Seed Patents (Class 23/301)
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Patent number: 11847246Abstract: Techniques are described for communicating between two organizations without exchanging sensitive private information. One of the methods includes generating a token representative of private data. The method includes identifying at least one entity associated with the private data. The method includes associating the token with at least one entity. The method also includes providing information identifying at least one entity and the token to a machine learning system.Type: GrantFiled: September 12, 2018Date of Patent: December 19, 2023Assignee: United Services Automobile Association (USAA)Inventors: Fredrick William Rodgers, Michael P. Gout
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Patent number: 11326273Abstract: A device for producing a tubular single crystal comprises a crucible, a heating means, a die disposed in the crucible, having an annular slit, and a pulling-up means. The upper surface of the die includes an upward slope that increases in height from the annular slit to an inner diameter side and an outer diameter side, respectively, progressing away from the annular slit, wherein the maximum height of the slope on the inner diameter side (H1) is greater than the maximum height of the slope on the outer diameter side (H2) and the difference (H1?H2) is 0.1 mm or more and less than 7.5 mm.Type: GrantFiled: May 28, 2019Date of Patent: May 10, 2022Assignee: KYOCERA CorporationInventors: Ichiro Sakano, Masatoshi Harada, Akeo Fukui
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Patent number: 10792771Abstract: Disclosed is a method of making an integrally bladed rotor. According to the method, a rotor disk comprising a radially outer rim surface is provided. A portion of the disk outer rim surface is removed, leaving a protrusion on the rotor disk outer rim surface. The disk with material removed is subjected to thermal processing. A blade comprising an airfoil and a base is positioned such that a base surface is in contact with the protrusion, and heat, pressure, and motion are applied between the blade and the disk to friction weld the base surface to the protrusion.Type: GrantFiled: September 12, 2017Date of Patent: October 6, 2020Assignee: RAYTHEON TECHNOLOGIES CORPORATIONInventors: Michael F. Machinchick, Luke H. Rettberg, Andrew L. Haynes, Janet M. Stanley, Vasisht Venkatesh, David Ulrich Furrer, James R. Murdock, Daniel Gynther, Michael J. Linden
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Patent number: 10384190Abstract: The present invention relates to a tubular reactor (14) for multi-phase polymerization, in particular for producing butyl rubber, comprising a pipe piece (16) for radially delimiting a reactor volume between an inlet (18) and an outlet (20), a stirrer (22) for generating a flow (27) in the radial direction of the pipe piece (16), wherein the stirrer (22) is dimensioned and operable such that the flow (27) is impartable with a centrifugal force which generates a concentration distribution in the radial direction inside the pipe piece (16) and an outlet conduit (32) for discharging a concentrated radially inner part (30) of the flow (27, 28). Enrichment of polymer particles in the radially inner part (30) of the flow (27, 28) avoids gumming of the pipe piece (16) by the polymer particles so that the risk of a blockage is reduced.Type: GrantFiled: January 21, 2016Date of Patent: August 20, 2019Inventor: Joachim Ritter
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Patent number: 10369493Abstract: A continuous process for producing crystalline ammonium sulfate, said process comprising a start-up operation followed by a steady-state operation, wherein the start-up operation comprises: i) in a crystallizer, evaporating solvent from an approximately saturated ammonium sulfate solution; ii) replacing evaporated solvent with further approximately proximately saturated ammonium sulfate solution; iii) introducing to the crystallizer seed crystals of ammonium sulfate; iv) continuing to evaporate solvent, until a desired degree of supersaturation is reached; and v) recovering crystalline ammonium sulfate from ammonium sulfate solution in a recovery unit, and the steady-state operation comprises: vi) continuously feeding approximately saturated ammonium sulfate solution into the crystallizer and continuously withdrawing ammonium sulfate crystals from the crystallizer, such that the total combined volume of ammonium sulfate solution and ammonium sulfate crystals within the crystallizer remains constant; and vii)Type: GrantFiled: August 28, 2013Date of Patent: August 6, 2019Assignee: CAP III B.V.Inventors: Geert Ekkelenkamp, Johan Thomas Tinge, Pieter Vonk
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Patent number: 9428400Abstract: Titanium dioxide and an electro-conductive titanium oxide which each includes particles having a large major-axis length in a large proportion and comprises columnar particles having a satisfactory particle size distribution. A titanium compound, an alkali metal compound, and an oxyphosphorus compound are heated/fired in the presence of titanium dioxide nucleus crystals having an aspect ratio of 2 or higher to grow the titanium dioxide nucleus crystals. Subsequently, a titanium compound, an alkali metal compound, and an oxyphosphorus compound are further added and heated/fired in the presence of the grown titanium dioxide nucleus crystals. Thus, titanium dioxide is produced which comprises columnar particles having a weight-average major-axis length of 7.0-15.0 ?m and in which particles having a major-axis length of 10 ?m or longer account for 15 wt. % or more of all the particles. A solution of a tin compound and a solution of compounds of antimony, phosphorus, etc.Type: GrantFiled: November 24, 2014Date of Patent: August 30, 2016Assignee: ISHIHARA SANGYO KAISHA, LTD.Inventors: Kaoru Isobe, Katsuichi Chiba, Takanori Sakamoto
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Patent number: 8926713Abstract: Titanium dioxide which includes particles having a large major-axis length in a large proportion and comprises columnar particles having a satisfactory particle size distribution. A titanium compound, an alkali metal compound, and an oxyphosphorus compound are heated/fired in the presence of titanium dioxide nucleus crystals having an aspect ratio of 2 or higher to grow the titanium dioxide nucleus crystals. Subsequently, a titanium compound, an alkali metal compound, and an oxyphosphorus compound are further added and heated/fired in the presence of the grown titanium dioxide nucleus crystals. Thus, titanium dioxide is produced which comprises columnar particles having a weight-average major-axis length of 7.0-15.0 ?m and in which particles having a major-axis length of 10 ?m or longer account for 15 wt. % or more of all the particles.Type: GrantFiled: June 4, 2012Date of Patent: January 6, 2015Assignee: Ishihara Sangyo Kaisha, Ltd.Inventors: Kaoru Isobe, Katsuichi Chiba, Takanori Sakamoto
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Patent number: 8835005Abstract: The present invention relates to a process for the preparation of granules comprising the steps of: providing a granulation zone comprising particles, the particles being kept in motion; providing a first feed stream comprising a liquid composition into the granulation zone, the liquid composition being applied onto or over the moving particles in the granulation zone; withdrawing a product stream comprising granules from the granulation zone, the granules being the result of layered growth of the moving particles in the granulation zone; wherein a second feed stream comprising granulation nuclei is fed into the granulation zone, wherein the granulation nuclei have a particle size distribution characterized by a standard deviation of the particle size that is less than 15% of the mean particle size, and wherein the second feed stream comprises between 0.05 wt % and 50 wt % of the product stream.Type: GrantFiled: August 10, 2010Date of Patent: September 16, 2014Assignee: Stamicarbon B.V.Inventors: Willem Frederik Roos, Fredericus Henricus Maria Buitink
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Patent number: 8323360Abstract: A method of crystallization is provided. The method includes providing a solution comprising a solute dissolved in a first solvent. The method includes providing a dispersion comprising a plurality of nanoparticles in a second solvent. The first solvent and the second solvent are mutually miscible. The method includes combining the solution and the dispersion to form a mixture. The nanoparticles remain dispersed in the mixture and the solute remains dissolved in the mixture at or below a saturation concentration. The method includes cooling the mixture such that the solute exceeds the saturation concentration forming crystals in the presence of the dispersed nanoparticles. The method includes separating the crystals from the mixture, wherein the nanoparticles remain dispersed in the mixture.Type: GrantFiled: June 26, 2009Date of Patent: December 4, 2012Assignee: 3M Innovative Properties CompanyInventors: Jimmie R. Baran, Jr., William J. Hunt
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Patent number: 8298300Abstract: The invention relates to a continuous process for preparing large crystal products of a crystalline product in a fluid bed crystallizer, said fluid bed crystallizer comprising a crystallization vessel and means for mechanically impacting of crystals; and connected to the crystallization vessel (i) a feed line; (ii) an external circulation circuit comprising means for determining properties of the slurry in the external circulation circuit and a heat exchanger; and (iii) a product withdrawal line, wherein—for any specific crystalline product and at any flow rate chosen in the external circulation circuit—the weight percentage of crystals of the crystalline product in the slurry in the external circulation circuit, ECCWPC, is controlled by said means for determining properties of the slurry within a specified and predetermined narrow range having a maximum and minimum value not more apart than at most 25% by weight and falling within the range of from 1 to 50% by weight.Type: GrantFiled: July 19, 2007Date of Patent: October 30, 2012Assignee: DSM IP Assets B.V.Inventor: Geert Ekkelenkamp
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Patent number: 8288022Abstract: A perovskite phosphor film emitting red light from among the three primary colors (i.e., red, green and blue) underlying the construction of displays which is fabricated by adsorbing a nanosheet as a seed layer on a solid substrate and forming an oriented film of an oxide phosphor thereon, characterized in that the perovskite phosphor film comprises a film of an oxide phosphor (3) having a high transparency that is formed on a seed layer comprising a nanosheet (2) that is adsorbed on a solid substrate (1) such as a glass substrate or the like, and the oxide phosphor (3) is (SrxCa1-x)1-yPryTiO3: 0?x?0.8, 0.001?y?0.01.Type: GrantFiled: July 17, 2009Date of Patent: October 16, 2012Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Keiichi Ikegami, Hiroshi Takashima, Takeo Ebina, Hiroyuki Tetsuka
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Patent number: 8178066Abstract: The present invention provides a method for stabilizing fine particles of calcium phosphates without lowering their solid phase forming activity. It is possible to stabilize the fine particles of calcium phosphates by stopping the growth of the fine particles formed in an aqueous solution supersaturated with respect to calcium phosphates. More specifically, the fine particles of calcium phosphates were stabilized by lowering the inorganic ion concentration of a fine-particle-forming solution containing fine particles of calcium phosphates by dialysis, ion exchange, dilution, or the like, or by separating the fine particles of calcium phosphates from the fine-particle-forming solution by filtration, centrifuging, or the like.Type: GrantFiled: August 15, 2006Date of Patent: May 15, 2012Assignee: Kyoto UniversityInventors: Takeshi Yao, Mitsuhiro Hibino, Seiji Yamaguchi, Hidetaka Okada
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Patent number: 7820057Abstract: The invention relates to a method for removing at least one constituent from a solution, comprising:—forming a liquid mixture by bringing together said solution (1) and a particulate seed material (6) under conditions or in the presence of one or more substances which cause the constituent to be removed to crystallize out on the surface of the seed material; and—separating the seed material having the constituent to be removed crystallized out thereon from the liquid mixture by passing the liquid mixture through a filter (3), wherein the pore size of the filter (3) is greater than or equal to the particle size of the seed material (6). The invention also relates to a method for preparing a particulate material wherein use is made of the method according to the present invention. The invention also relates to the particulate material obtainable by this method. The invention further relates to an apparatus that can be used in the process of the present invention.Type: GrantFiled: October 8, 2004Date of Patent: October 26, 2010Assignee: Nederlandse Organisatie voor toegepastnatuurwetenschappelijk Onderzoek TNOInventors: Dirk Verdoes, Johannes van der Meer, Earl Lawrence Vincent Goetheer
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Patent number: 7763223Abstract: In a synthetic method for porous silica crystals through a hydrothermal reaction, a method for synthesizing porous silica crystals with a size of 0.5 mm or larger in high reproducibility and efficiency is provided using a method for manufacturing the porous silica crystals, wherein a high concentration area with silicon is formed as a partial area inside a hydrothermal synthesis vessel, and at least a part of a surface-smoothed bulk material is present in the high concentration area with silicon to perform the hydrothermal reaction, the bulk material comprising a compound containing both silicon and oxygen as a supply source for a part or a whole of the structure composition elements of the porous silica crystals.Type: GrantFiled: September 12, 2005Date of Patent: July 27, 2010Assignees: Shimane Prefectural Government, Shimane UniversityInventors: Shuji Noda, Takanobu Shiomura, Masahiro Tajima, Naoto Imawaka, Yasuaki Okamoto, Takeshi Kubota
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Patent number: 7736614Abstract: A process for removing aluminum and other metal chlorides from liquid chlorosilanes with the steps of: introducing a source of seed into a source of impure liquid chlorosilanes, initiating the crystallization of aluminum and other metal chlorides on the seed from the liquid chlorosilanes in a first agitated vessel, passing the resulting mixture of liquid and solids through a cooler into a second agitated vessel for additional crystallization, transferring the resulting mixture of liquid and solids into a solids removal device, transferring the liquid with reduced solids content to a further process or vessel and transferring the liquid with high solids content into a waste concentration device, passing the resulting liquid with reduced solids content to a further process or vessel and passing the resultant liquid with very high solids content to a waste storage vessel with agitation.Type: GrantFiled: April 7, 2008Date of Patent: June 15, 2010Assignee: Lord Ltd., LPInventor: Stephen Michael Lord
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Publication number: 20100024172Abstract: The invention relates to a continuous process for preparing large crystal products of a crystalline product in a fluid bed crystallizer, said fluid bed crystallizer comprising a crystallization vessel and means for mechanically impacting of crystals; and connected to the crystallization vessel (i) a feed line; (ii) an external circulation circuit comprising means for determining properties of the slurry in the external circulation circuit and a heat exchanger; and (iii) a product withdrawal line, wherein—for any specific crystalline product and at any flow rate chosen in the external circulation circuit—the weight percentage of crystals of the crystalline product in the slurry in the external circulation circuit, ECCWPC, is controlled by said means for determining properties of the slurry within a specified and predetermined narrow range having a maximum and minimum value not more apart than at most 25% by weight and falling within the range of from 1 to 50% by weight.Type: ApplicationFiled: July 19, 2007Publication date: February 4, 2010Inventor: Geert Ekkelenkamp
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Patent number: 7637965Abstract: A process for operating a hydraulic wash column, in which the position of the buildup front in the wash column is positioned by means of the flow rates of control liquor conducted into the wash column and/or by means of the flow rate of the suspension conducted into the wash column, and the flow rate determination is with the aid of the pressure difference which exists in the column between points in the suspension zone disposed upstream of the buildup front and points in the zone projecting from the buildup front up to the end of the crystal bed.Type: GrantFiled: April 10, 2006Date of Patent: December 29, 2009Assignee: BASF AktiengesellschaftInventors: Joerg Heilek, Klaus Joachim Mueller-Engel, Ulrich Hammon, Thomas Walter
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Patent number: 7520932Abstract: A method of analyzing carbon concentration in crystalline silicon includes providing a section from a zoned and annealed silicon core. The zoned and annealed core is extracted from a polycrystalline silicon composition and has a columnar shape. The zoned and annealed core includes a single crystalline silicon region and a freeze-out melt region. The freeze-out melt region is disposed adjacent to the single crystalline silicon region, and the regions are spaced along a length of the columnar shape. Specifically, the section is provided from the freeze-out melt region, with the entire freeze-out melt region in the section. A carbon concentration of the section is determined. By providing the section from the freeze-out melt region, as opposed to the polycrystalline silicon composition, determination of carbon concentration in the crystalline silicon is enabled with a sensitivity at less than or equal to 10 parts per billion atomic.Type: GrantFiled: March 29, 2007Date of Patent: April 21, 2009Assignee: Dow Corning CorporationInventor: Doug Kreszowski
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Publication number: 20090000080Abstract: A solid hollow fiber cooling crystallizer and method for crystallizing aqueous and organic solutions are provided. The solid hollow fiber crystallizer (SHFC) for carrying out cooling crystallization of inorganic/organic microsolutes/macrosolutes from solution generally includes a bundle of non-porous hollow fibers mounted within a shell where a feed solution for crystallization flows through the lumen side of the hollow fibers and a cooling solution flows through the shell side to form nuclei and subsequently crystals in the feed solution at a temperature below its saturation temperature. The solid hollow fiber crystallizer may be combined with a mixing device, such as a completely stirred tank or static mixer, to further effectuate crystallization. The solid hollow fiber crystallizer may be operated in a number of modes including feed recycle mode, once through mode, SHFC-in-line static mixer in series mode, and SHFC-CST in series mode.Type: ApplicationFiled: May 2, 2008Publication date: January 1, 2009Applicant: NEW JERSEY INSTITUTE OF TECHNOLOGYInventors: Kamalesh K. Sirkar, Dimitrios Zarkadas
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Patent number: 7438729Abstract: In order to produce granules granulometrically polidispersed in a very little range, a fluid bed granulation process of the type comprising the steps of preparing a fluid bed of seeds (S1) of the substance to be granulated, having a free surface (P) substantially horizontal; and feeding a continuous flow (L) of a fluid comprising a growth liquid, provides in the fluid bed for a continuous vortex (V) with a substantially horizontal axis, in which an upper zone (Z1) of seeds wetting and evaporation of possible solvent contained in the flow (L) and a lower zone (Z2) of solidification/consolidation of the growth liquid are identified.Type: GrantFiled: March 20, 2002Date of Patent: October 21, 2008Assignee: Urea Casale S.A.Inventor: Gianfranco Bedetti
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Publication number: 20080229549Abstract: This disclosure pertains to a process for making single crystal Group III nitride, particularly gallium nitride, at low pressure and temperature, in the region of the phase diagram of Group III nitride where Group III nitride is thermodynamically stable comprises a charge in the reaction vessel of (a) Group III nitride material as a source, (b) a barrier of solvent interposed between said source of Group III nitride and the deposition site, the solvent being prepared from the lithium nitride (Li3N) combined with barium fluoride (BaF2), or lithium nitride combined with barium fluoride and lithium fluoride (LiF) composition, heating the solvent to render it molten, dissolution of the source of GaN material in the molten solvent and following precipitation of GaN single crystals either self seeded or on the seed, maintaining conditions and then precipitating out.Type: ApplicationFiled: April 25, 2008Publication date: September 25, 2008Inventors: Boris N. Feigelson, Richard L. Henry
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Publication number: 20080092340Abstract: The present invention concerns a method for the controlled precipitation of organic molecules which comprises the use of apparatus that is normally used in the field of photography.Type: ApplicationFiled: July 19, 2005Publication date: April 24, 2008Inventors: Gertjan Bogels, Jan Bastiaan Bouwstra, Huib Van Boxtel
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Patent number: 7357835Abstract: A crystalline material sufficiently pure for use in pharmaceuticals may be made by forming a saturated solution of the material, changing the temperature of the solution so it becomes supersaturated, and subjecting the solution to irradiation by high intensity ultrasound, the frequency of the ultrasound being scanned over a range of frequencies. For example the ultrasound may be varied between 19.5 and 20.5 kHz, and this variation may be sinusoidal. Preferably the ultrasound is provided only briefly, say for less than 5 s, before allowing the solution to cool gradually without further irradiation. The ultrasound may be applied using a vessel with an array of ultrasonic transducers attached to a wall, so each transducer radiates no more than 3 W/cm2 yet the power dissipation within the vessel is between 25 and 150 W/litre. This method can reduce the metastable zone width to less than 10 K. It is applicable in particular to aspartame.Type: GrantFiled: May 13, 2003Date of Patent: April 15, 2008Assignee: Accentus PLCInventors: Linda Jane McCausland, John Patrick Perkins
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Patent number: 7270752Abstract: A process is described for purifying lactams, in particular the lactams obtained by cyclizing hydrolysis of an aminoalkylnitrile, and more particularly to the purification by crystallization of ?-caprolactam obtained by cyclizing hydrolysis of aminocapronitrile. This crystallization is carried out on the cyclization reaction medium after hydrogenation, removal of volatile compounds, and treatment with an ion-exchange resin.Type: GrantFiled: December 27, 2000Date of Patent: September 18, 2007Assignee: Rhodia Polyamide IntermediatesInventors: Philippe Carvin, Jean-Claude Masson
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Patent number: 7011708Abstract: A device includes an agitation tank, a liquid circulation means for circulating a liquid along a tank wall of the agitation tank, and at least one auxiliary heat transfer means provided inside the agitation tank, wherein the auxiliary heat transfer means is constantly put in a wetted state.Type: GrantFiled: September 17, 2001Date of Patent: March 14, 2006Assignee: Kansai Chemical Engineering Co. Ltd.Inventors: Hideo Noda, Hiroshi Ooshima, Takaya Inoue, Hiroaki Ueda
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Patent number: 6881231Abstract: A composition for reducing deposition of a mineral salt from an aqueous supersaturated solution onto a solid surface in contact with the aqueous supersaturated solution which composition comprises a dispersion of either (i) seed crystals of the mineral salt in an aqueous solution of the mineral salt or (ii) seed crystals of a salt isomorphous with the mineral salt in an aqueous solution of the isomorphous salt wherein the dispersed seed crystals are of Mean particle size of less than 2.5 microns.Type: GrantFiled: December 14, 2001Date of Patent: April 19, 2005Assignees: BP Exploration Operating Company Limited, Asymptote LimitedInventors: Elizabeth Acton, George John Morris
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Patent number: 6855176Abstract: A method for purifying substances through emulsion crystallisation is described, whereby (a) an emulsion of organic liquid droplets in a continuous water phase containing the impure substance is formed; (b) the emulsion is super-saturated in the substance; (c) crystallisation of the substance in the water phase is induced; (d) the crystals of the substance are isolated from the from emulsion, yielding an emulsion-filtrate; (e) additional impure substance is dissolved in the emulsion-filtrate; and (f) steps (b)-(d) are repeated with the emulsion obtained from step (e).Type: GrantFiled: March 8, 2000Date of Patent: February 15, 2005Assignee: Reuter Chemische Apparatebau KG [DE/DE]Inventor: Karl Reuter
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Patent number: 6670036Abstract: There are disclosed a silicon seed crystal which is composed of silicon single crystal and used for the Czochralski method, wherein oxygen concentration in the seed crystal is 15 ppma (JEIDA) or less, a silicon seed crystal which is used for the Czochralski method, wherein the silicon seed crystal does not have a straight body, and a method for producing a silicon single crystal by the Czochralski method comprising using said seed crystal, bringing a tip end of the seed crystal into contact with a silicon melt to melt the tip end of the seed crystal, with or without performing necking operation, and growing a silicon single crystal. The method is capable of improving the rate of success in making crystals dislocation-free and the productivity of single crystal rods regardless of the use of necking operation.Type: GrantFiled: April 6, 1999Date of Patent: December 30, 2003Assignee: Shin-Etsu Handotai Co., Ltd.Inventors: Eiichi Iino, Masanori Kimura
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Patent number: 6589906Abstract: Disclosed are methods for producing films of a composite comprising a metal oxide in combination with one or more other oxides or metals as a third component, or a composite comprising a metal oxide doped with metal ions as a third component, methods for producing titanium oxide coating layers having transparency, low peeling property and weather resistance, which are comparable to or even more excellent than those of conventional ones, as well as surface hardness comparable to that of coating films produced by using sintering, on plastic substrates, and methods for producing titanium oxide which exhibits photocatalytic activity even with light of visible light range. These methods do not require a treatment at a high temperature.Type: GrantFiled: January 11, 2002Date of Patent: July 8, 2003Assignee: Hoya CorporationInventors: Koji Sato, Shigeaki Ohmi
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Patent number: 6566490Abstract: Disclosed is a method for producing seeding microcrystals for the production of human insulin, the microcrystals being free of non-human pancreatic insulin, the method comprising providing an unseeded suspension of human insulin, the suspension being free of non-human pancreatic insulin, and homogenizing the insulin suspension under pressure to result in human insulin microcrystals suitable for use as seeding microcrystals for the production of zinc insulin products. The method of homogenization under pressure may also be used for the production of seeding mnicrocrystals for other peptides and proteins, in particular pharmaceutical peptides or proteins such as insulin, GLP-1, glucagon and growth hormones.Type: GrantFiled: December 20, 2000Date of Patent: May 20, 2003Assignee: Novo Nordisk A/SInventors: Flemming Manique, Christian Ilsoe
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Patent number: 6478828Abstract: A process for crystallization of an inorganic substance includes preparing a supersaturated solution of the inorganic substance to be crystallized in a solvent which is a liquid; forcing a stream of the supersaturated solution upwardly through successively a fluidized bed distributor of a fluidized bed reactor and a bed of crystals arranged above the fluidized bed distributor with a pressure effective to cause fluidization of the bed of crystals, the fluidized bed distributor dividing the stream of supersaturated solution into thin, substantially parallel and vertical jets; maintaining the fluidized bed distributor at a temperature which is uniform and at which the inorganic substance to be crystallized from the supersaturated solution is lower than or equal to the concentration corresponding to saturation; and controlling the temperature of the fluidized bed distributor to cause the stream of supersaturated solution in the fluidized bed distributor to undergo a temperature change which is insufficient to desType: GrantFiled: December 19, 1994Date of Patent: November 12, 2002Assignee: Solvay & Cie (Société Anonyme)Inventors: Léon Ninane, Léopold Detry
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Patent number: 6464736Abstract: The present invention provides a process for producing crystals of a polymorphic compound in a first crystal structure by introduction of the compound in a second crystal structure into a saturated brine solution of the compound under conditions in which formation of the first crystal structure is favored and without evaporation or changes in temperature. As the second crystal structure dissolves, the brine becomes supersaturated resulting in relief of supersaturation by formation of crystals of the first crystal structure. The process includes controlling supersaturation and its relief to achieve growth of existing crystals of the first crystal structure rather than nucleation and formation of new crystals. The resulting crystals are separated from insoluble impurities on a size separation basis.Type: GrantFiled: March 9, 2000Date of Patent: October 15, 2002Assignee: Environmental Projects, Inc.Inventors: Wayne C. Hazen, Dale Lee Denham, Jr., David R. Baughman, Rudolph Pruszko
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Patent number: 6428583Abstract: A crystallization process is described for separating a desired substance from an aggregate mixture in which an emulsion of droplets in a continuous phase containing the aggregate mixture is formed and supersaturated, characterized in that the emulsion is seeded with seed crystals of the desired substance and seed crystals of at least one other substance in the aggregate mixture to effect crystallization of the desired substance and the other substance(s) in the continuous phase. Also described are substances separated by the process, and devices for carrying out the process.Type: GrantFiled: April 27, 2000Date of Patent: August 6, 2002Assignee: Reuter Chemische Apparatebau KGInventor: Karl Reuter
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Patent number: 6383233Abstract: A process is described for separating a desired substance from an aggregate mixture in which process a three-phase dispersion is formed, the first phase comprising droplets phase comprising a liquid transport phase, and the third phase comprising a surface upon which the desired substance can crystallize, whereby a chemical potential exists for crystal growth of the desired substance in the third phase thereby creating a flow of the desired substance from the first phase through the second phase to the third phase where the desired substance crystallizes, characterized in that the Gibb's free enthalpy of formation (&Dgr;G) of the droplets is <0.Type: GrantFiled: January 19, 1999Date of Patent: May 7, 2002Assignee: Reuter Chemicscher Apparatebau KGInventor: Karl Reuter
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Patent number: 6364914Abstract: Herein is disclosed a method of crystallization with the particle size distribution being controlled, characterized in that while crystals are being precipitated by vacuum concentration crystallization, the temperature of the slurry is periodically varied up and down during the concentration of the crystallization mother liquor (i.e., the slurry), which method is an excellent one free from the defects of the conventional methods.Type: GrantFiled: March 19, 1999Date of Patent: April 2, 2002Assignee: Ajinomoto Co., Inc.Inventors: Hiroshi Ueda, Hiroshi Fukushi, Muneyuki Ozawa
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Patent number: 6334878Abstract: An apparatus for crystallization, which contains a crystallization vessel, a seed supplying device, a feed solution supplying device and a tube baffle disposed within the crystallization vessel. The tube baffle is provided with a crystallization portion in an inner area and a lower area thereof, and the tube baffle and the crystallization vessel define a classification portion there between. The apparatus further contains an agitating fan for agitating the seed crystals and the feed solution, and a plurality of plate baffles disposed within the classification portion which define a buffer portion and a gravitational settling portion. The apparatus further contains a device for generating a rising velocity of a slurry containing fine crystals in the gravitational settling portion by discharging the slurry so that the rising velocity of the slurry is greater than a settling velocity of the fine crystals and an outlet for discharging the crystallized material.Type: GrantFiled: August 27, 1999Date of Patent: January 1, 2002Assignee: Ajinomoto Co., Inc.Inventors: Ichiro Miyahara, Tatsuo Kitamura, Masato Yokoyama, Takashi Koko
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Patent number: 6315966Abstract: Continuously operated, two-part crystallizer which is particularly suitable for the resolution of racemic mixtures, and process for separating solid mixtures which are difficult to separate, in particular racemates.Type: GrantFiled: December 15, 1998Date of Patent: November 13, 2001Assignee: Haarmann & Reimer GmbHInventors: Hans-Dieter Baumgard, Bernhard Haedke, Josef Himmelreich, Helmut Judat
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Patent number: 6267789Abstract: Process for enriching crude salt, in which the crude salt is ground and then cooled in a saturated aqueous sodium chloride solution, to a temperature below the anhydrous sodium chloride to sodium chloride dihydrate transition temperature, a stock of a powder comprising sodium chloride crystals is collected from the cooling step and the powder is subjected to particle-size fractionation from which a fine particle-size fraction and a coarse particle-size fraction comprising the enriched salt are collected.Type: GrantFiled: October 12, 1999Date of Patent: July 31, 2001Assignee: Solvay (Société Anonyme)Inventor: Léon Ninane
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Patent number: 6251358Abstract: Process for the preparation of sodium fluoride from sodium hydroxide solution and hydrogen fluoride or hydrofluoric acid, characterized in that <45% strength by weight, preferably 20 to 40% strength by weight, sodium hydroxide solution and hydrogen fluoride or hydrofluoric acid are introduced separately into a saturated NaF solution in which 4 to 50% by weight, preferably 5 to 30% by weight, of solid NaF are suspended and whose temperature is in the range from 20 to 80° C., preferably 30 to 60° C.Type: GrantFiled: July 30, 1999Date of Patent: June 26, 2001Assignee: Bayer AktiengesellschaftInventors: Günter Lailach, Andreas Bulan, Günter Buss
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Patent number: 6251182Abstract: The present invention is an improved susceptor for a float-zone apparatus for the float-zone processing of silicon elements. The susceptor is of a cylindrical design which allows the susceptor to be positioned around a free end of a silicon element to heat the free end of the silicon element to facilitate inductive coupling of the free end of the silicon element with an RF induction coil heater. In a preferred embodiment of the present invention, the susceptor is formed from tantalum.Type: GrantFiled: May 11, 1993Date of Patent: June 26, 2001Assignee: Hemlock Semiconductor CorporationInventors: Joaquin Enrique Luna, Scott Allen Wheelock
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Publication number: 20010000546Abstract: The present invention relates to a process for the manufacture of particles comprising magnesium chloride, which may serve as a support for a catalytic component for the polymerization of olefins, this process comprising a step of placing in contact between solid particles, an organomagnesium derivative and a chlorinating agent for the organomagnesium derivative. The process affords excellent control over the morphology of the support particles, particles of catalytic component and polymer particles.Type: ApplicationFiled: December 18, 2000Publication date: May 3, 2001Applicant: ELF ATOCHEM S.A.Inventor: Claude Brun
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Patent number: 6113657Abstract: In a process for preparing crystalline NaOH.3.5H.sub.2 O, NaOH.3.5H.sub.2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of NaOH.3.5H.sub.2 O and the crystals formed are separated from the solution using a mechanical solid/liquid separation apparatus, wherein the solid/liquid separation is carried out under conditions under which the crystalline NaOH.3.5H.sub.2 O is freed sufficiently of residual solution adhering to the surface for the sodium chloride content of the crystalline NaOH.3.5H.sub.2 O obtained to be less than 100 mg per kg. The crystalline NaOH.3.5H.sub.2 O is subjected to an additional purification step, which may include the at least superficial melting or the at least superficial dissolution of the crystals, in combination with a solid/liquid separation step. The additional purification step. The additional purification step comprises washing the crystalline NaOH.3.5H.sub.2 O separated off.Type: GrantFiled: March 13, 1998Date of Patent: September 5, 2000Assignee: BASF AktiengesellschaftInventors: Dieter Schlafer, Michael Mauss, Matthias Rauls, Dieter Baumann
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Patent number: 6106794Abstract: Process for the preparation of sodium fluoride from sodium hydroxide solution and hydrogen fluoride, characterized in that at least 45% strength by weight, in particular 50% strength by weight, sodium hydroxide solution and anhydrous hydrogen fluoride are introduced separately into a saturated NaF solution in which 4 to 50% by weight, preferably 5 to 30% by weight, solid NaF are suspended and the temperature of which is in the range from 20 to 80.degree. C., preferably 30 to 60.degree. C.Type: GrantFiled: July 30, 1999Date of Patent: August 22, 2000Assignee: Bayer AktiengesellschaftInventors: Gunter Lailach, Andreas Bulan, Gunter Buss
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Patent number: 6080210Abstract: A process for producing aluminum fluoride particles having a smooth surface, comprising the steps of adding aluminum fluoride seed crystals to a super-saturated solution of aluminium fluoride; allowing aluminum fluoride particles to be precipitated under heating and agitation; collecting the aluminium fluoride particles by filtration; and drying them, wherein: a super-saturated solution of aluminium fluoride containing 0.6 to 1.3 wt % of fluosilicic acid which is preferably obtained by reacting aluminum hydroxide with fluosilicic acid in an [Al(OH).sub.3 /H.sub.2 SiF.sub.6 ] molar ratio of 1.80 to 1.90 is used as the crystallization mother liquor.Type: GrantFiled: November 14, 1997Date of Patent: June 27, 2000Assignee: Onoda Chemical Industry Co., Ltd.Inventors: Motohiko Asano, Toyohiro Nawata, Masahiro Numata, Koji Okamoto, Takashi Goda, Kazuyoshi Kamata
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Patent number: 5985165Abstract: The present invention allows the reproduction of a crystalline aluminum hydroxide having a high particle strength and a high purity which can find wide application such as abrasive from a supersaturated sodium aluminate solution which is being recycled in the production of aluminum hydroxide or lithographic printing plate. In a process for the purification of aluminum hydroxide which comprises the hydrolysis reaction of a supersaturated solution of sodium aluminate to crystallize aluminum hydroxide, the improvement which comprises the steps of keeping the temperature of a suspension formed by mixing a mother liquor having a total caustic soda concentration of from 50 to 700 g/l and an aluminum concentration or from 0 to 300 g/l with crystalline aluminum hydroxide at a range of from 10.degree. C. to 200.degree. C. for at least 1 to 48 hours, mixing the suspension with the supersaturated solution of sodium aluminate, and then causing the crystallization reaction at the crystallization reaction temperature.Type: GrantFiled: October 31, 1996Date of Patent: November 16, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroshi Fukuta, Tsutomu Kakei, Tadabumi Tomita, Hideki Miwa
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Patent number: 5879647Abstract: An improvement is proposed in the so-called urea method for the preparation of fine particles of yttrium oxide, according to which, while an aqueous reaction mixture containing a water-soluble yttrium salt, e.g., nitrate, and urea dissolved therein in specified concentrations is heated at 90.degree. to 100.degree. C. to effect precipitation of yttrium carbonate hydroxide particles followed by calcination of the carbonate hydroxide in air into yttrium oxide, the aqueous reaction mixture is diluted with addition of a specified volume of preheated water within a critical period between incipient appearance of turbidity in the reaction mixture by the precipitation of the carbonate hydroxide and a moment 30 minutes thereafter. In this way, the yttrium oxide particles obtained have a globular particle configuration with a very small average particle diameter D.sub.50 in the range from 0.1 to 0.3 .mu.m and are suitable for use in various fine applications.Type: GrantFiled: November 13, 1997Date of Patent: March 9, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazuhiro Wataya, Shigeru Sakai
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Patent number: 5814231Abstract: A process for separating a liquid eutectic mixture by crystallization of one eutectic forming substance of the mixture on a cold surface to which seed crystals of the eutectic forming substance have been applied in the form of a seed crystal layer, and subsequent removal of the eutectic forming substance in liquid form after heating of the surface.Type: GrantFiled: September 9, 1996Date of Patent: September 29, 1998Assignee: BASF AktiengesellschaftInventors: Klaus Borho, Jorg Heilek, Gunter Schnabel
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Patent number: 5776864Abstract: A method of fabricating bulk YBa.sub.2 Cu.sub.3 O.sub.x where compressed powder oxides and/or carbonates of Y and Ba and Cu present in mole ratios to form YBa.sub.2 Cu.sub.3 O.sub.x are heated in the presence of a Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.y seed crystal to a temperature sufficient to form a liquid phase in the YBa.sub.2 Cu.sub.3 O.sub.x while maintaining the seed crystal solid. The materials are slowly cooled to provide a YBa.sub.2 Cu.sub.3 O.sub.x material having a predetermined number of domains between 1 and 5. Crack-free single domain materials can be formed using either plate shaped seed crystals or cube shaped seed crystals with a pedestal of preferential orientation material.Type: GrantFiled: April 1, 1997Date of Patent: July 7, 1998Assignee: The University of ChicagoInventors: Volker Todt, Dean J. Miller, Donglu Shi, Suvankar Sengupta
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Patent number: 5755975Abstract: In a process for separating substances from a liquid mixture by crystallization in a crystallizer, a two-phase seed layer in the form of a melt or solution of the mixture to be separated, with crystals suspended therein, is applied, prior to the crystallization, to those surfaces of the crystallizer from which crystals grow during the crystallization.Type: GrantFiled: September 9, 1996Date of Patent: May 26, 1998Assignee: BASF AktiengesellschaftInventors: Bernd Eck, Bernhard Maltry
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Patent number: 5707406Abstract: A method of manufacturing aluminum fluoride anhydride by means of a wet method. This method is featured in that a seed crystal of AlF.sub.3.3H.sub.2 O containing not more than 5% of fine particle 40 .mu.m or less in diameter is added into the super-saturated solution of aluminum fluoride in such a ratio that the total surface area of the seed crystal is in the range of 40-100 m.sup.2 per 1 kg of AlF.sub.3.3H.sub.2 O to be precipitated until an initial concentration of the super-saturated solution is reduced to 1.6%. The initial concentration of the super-saturated solution is adjusted to 8 to 15%. Resultant slurry is heated under agitation, thereby precipitating in batch-wise large AlF.sub.3.3H.sub.2 O particles which are then separated, dried and dehydrated.Type: GrantFiled: January 29, 1997Date of Patent: January 13, 1998Assignee: Onoda Chemical Industry Co., Ltd.Inventors: Motohiko Asano, Masahiro Numata, Koji Okamoto, Takashi Goda