Selective Patents (Class 23/296)
  • Patent number: 10843259
    Abstract: A method for producing cast items in a casting method, wherein a charge of a conductive material is introduced into the sphere of influence of at least one alternating electromagnetic field, so that the charge is kept in a levitating state. The melt is poured into moulds in order to produce turbine blades, prostheses or turbocharger impellers.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: November 24, 2020
    Assignee: ALD VACUUM TECHNOLOGIES GMBH
    Inventors: Henrik Franz, Sergejs Spitans, Ulrich Betz, Egon Bauer, Markus Holz
  • Patent number: 10450630
    Abstract: A process for the recovery of lithium from lithium bearing mica rich minerals, the process comprising passing an ore containing one or more lithium bearing mica rich minerals to at least one pre-treatment step, passing the pre-treated ore to an acid leach step thereby producing a pregnant leach solution, subjecting the pregnant leach solution to a series of process steps in which one or more impurity metals are removed, and recovering lithium as a lithium containing salt product.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: October 22, 2019
    Assignee: Li-Technology Pty Ltd.
    Inventors: Gary Donald Johnson, Mark Daniel Urbani, Nicholas John Vines
  • Patent number: 10300434
    Abstract: A reactive composition comprising between 60% and 98% by weight of sodium bicarbonate, between 1% and 40% by weight of sodium carbonate and between 0.02% and 2.0% by weight of ammonia, expressed in the form of ammonium ions NH4+, and comprising from 0.01 to 5% by weight of a compound selected from the group consisting of hydrocarbons, fatty alcohols, fatty acids, and fatty acid salts.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: May 28, 2019
    Assignee: Solvay SA
    Inventors: Marc Thijssen, Patrick Perrin, Jorge Alejandro Kabbabe Malave
  • Patent number: 10040685
    Abstract: An apparatus for the extraction of phosphorus from wastewater that includes a precipitation module and a retention module. The precipitation module includes a crystallization vessel, one or more inlets disposed in a lower region of the precipitation module and at least one outlet disposed in an upper region of the precipitation module. The retention module includes a sedimentation vessel, at least one inlet disposed in an upper region of the retention module and at least one outlet disposed in a lower region of the retention module. At least one outlet of the precipitation module is connected to at least one inlet of the retention module and at least one outlet of the retention module is connected to at least one inlet of the precipitation module. The volume VS of the sedimentation vessel is greater than/equal to 0.6 times the volume VC of the crystallization vessel (VS?0.6·VC).
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: August 7, 2018
    Assignee: Eliquo Stulz GmbH
    Inventor: Ulrich Knörle
  • Patent number: 10028541
    Abstract: This disclosure relates to a garment having zippers for separating the garment into two halves. The garment has a zipper on the front and a zipper on the back. The halves can be mixed and matched according to preference for color, surface ornamentation, or material. Each half has an inside pocket that can be used for storing an additional garment half. The garment may optionally include a hood. In embodiments where the garment has a hood, the back zipper may unzip as the slider is moved in the downward direction, thereby allowing the user to separate the hood and fold the hood into a collar.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: July 24, 2018
    Inventor: S Jermikko Johnson
  • Patent number: 9914646
    Abstract: A method for the processing of potassium containing materials comprises: (i) Separation of a potassium containing mineral from gangue minerals; (ii) Acid leaching whereby substantially all potassium, iron, aluminum and magnesium is solubilized and mixed potassium/iron double salt formed; (iii) Selectively crystallizing the mixed potassium/iron double salt formed in the leach step (ii); (iv) Second separation to separate the mixed potassium/iron double salt formed in step (iii); (v) Thermal decomposition to produce an iron oxide, a potassium salt and one or more phosphates; (vi) Leaching the product of the thermal decomposition; (vii) Third separation to separate the iron oxide and phosphate from the potassium salt; (viii) Recovering the potassium salt by crystallization; (ix) Separating the iron oxide and phosphate of step (vii) by leaching and subsequent solid liquid separation; and (x) Precipitating phosphate from liquor produced in step (ix) through the addition of a base.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: March 13, 2018
    Assignee: K-Max Pty Ltd.
    Inventors: Gary Donald Johnson, Mark Daniel Urbani, Nicholas John Vines
  • Patent number: 9868645
    Abstract: The object of the disclosure is to provide a method for efficiently producing fine particles with low crystal growth of the raw material components, in particular fine particles with a plurality of raw material components in a highly complexed state and having low crystal growth, without blockage of the nozzle. The method of the disclosure for producing particles includes injecting a good solvent solution that includes a good solvent and one or more raw material components dissolved in the good solvent, with a nozzle into a precipitating poor solvent that has been heated to a temperature higher than the boiling point of the good solvent, to evaporate the good solvent solution and precipitate a plurality of particles, and running a cleansing poor solvent through the nozzle before starting and after completing injection of the good solvent solution into the precipitating poor solvent.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: January 16, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuo Yanagi, Hirokazu Kawaoka
  • Patent number: 9776880
    Abstract: The object of the disclosure is to provide a method for efficiently producing fine particles with low crystal growth of the raw material components, in particular fine particles with a plurality of raw material components in a highly complexed state and having low crystal growth, without blockage of the nozzle. The method of the disclosure for producing particles includes injecting a good solvent solution that includes a good solvent and one or more raw material components dissolved in the good solvent, with a nozzle into a precipitating poor solvent that has been heated to a temperature higher than the boiling point of the good solvent, to evaporate the good solvent solution and precipitate a plurality of particles, and running a cleansing poor solvent through the nozzle before starting and after completing injection of the good solvent solution into the precipitating poor solvent.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: October 3, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuo Yanagi, Hirokazu Kawaoka
  • Patent number: 9005310
    Abstract: A production saltwater disposal facility comprising a separator configured to receive production saltwater from a pipeline or a vehicle and separate hydrocarbons from the production saltwater, wherein the production saltwater received from the pipeline or vehicle is substantially the same composition as when the production saltwater was located in a subterranean formation, a hydrocarbon storage tank configured to receive hydrocarbons from the separator, a settling pit configured to receive the production saltwater from the separator and separate metals and/or other solids from the saltwater, an evaporator in fluid communication with the settling pit and comprising a nozzle configured to emit a stream of the saltwater along a path in air such that water in the saltwater evaporates, and a collection pit positioned under the path and configured to collect the salt from the saltwater after the water has evaporated.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: April 14, 2015
    Assignee: Hudgens Holdings, LLC
    Inventor: Dennis Hudgens
  • Patent number: 8771380
    Abstract: The present invention pertains to a process for producing sodium chloride comprising the steps of (i) preparing a brine comprising at least 150 g/l of sodium chloride by dissolving a sodium chloride source in water, (ii) subjecting the resulting brine to a eutectic freeze crystallization step by indirect cooling of said brine, resulting in the formation of ice, sodium chloride dihydrate, and a mother liquor, (iii) separating the sodium chloride dihydrate formed in step (ii) from the ice and optionally mother liquor at the eutectic temperature, such that a sodium chloride dihydrate-rich stream is formed, and (iv) feeding said sodium chloride dihydrate-rich stream to a recrystallizer to form sodium chloride and a mother liquor.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 8, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Hendrikus Wilhelmus Bakkenes, Johannes Albertus Maria Meijer, Allert Schokker
  • Patent number: 8734535
    Abstract: This invention relates to novel methods for affecting, controlling and/or directing various crystal formation, structure formation or phase formation/phase change reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a crystallization reaction system. In a second aspect of the invention, at least one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other (or all) crystallization reaction system participants being introduced into the reaction vessel.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: May 27, 2014
    Assignee: GR Intellectual Reserve, LLC
    Inventors: Bentley J. Blum, Juliana H. J. Brooks, Mark G. Mortenson
  • Patent number: 8486157
    Abstract: Process for the phase transformation of substances and mixtures of substances, in which the substance or the mixture of substances is introduced into a plasma reactor, the substance or the mixture of substances is converted into the higher-energy phase and the product is removed in gaseous form from the plasma reactor. The process can be used for the sublimation of metal salts, metal nitrates and/or metal alkoxides and other vaporizable metal-organic compounds.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 16, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Aymee Lisette Michel De Arevalo, Patrik Stenner, Stefan Fiedler, Dieter Kerner, Manfred Nagel
  • Patent number: 8414858
    Abstract: A novel method for high quality crystal growth of intermetallic clathrates is presented. The synthesis of high quality pure phase crystals has been complicated by the simultaneous formation of both clathrate type-I and clathrate type-II structures. It was found that selective, phase pure, single-crystal growth of type-I and type-II clathrates can be achieved by maintaining sufficient partial pressure of a chemical constituent during slow, controlled deprivation of the chemical constituent from the primary reactant. The chemical constituent is slowly removed from the primary reactant by the reaction of the chemical constituent vapor with a secondary reactant, spatially separated from the primary reactant, in a closed volume under uniaxial pressure and heat to form the single phase pure crystals.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: April 9, 2013
    Assignee: University of South Florida
    Inventors: George S. Nolas, Matthew K. Beekman
  • Patent number: 8388702
    Abstract: A unique method of convective dissolution of salts from in situ ponds by trenching salt beds, introducing dissolution waters to promote convective dissolution, pumping out the saturated solution from the pond bottom, and introducing additional dissolution waters.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: March 5, 2013
    Inventor: Abraham Sadan
  • Patent number: 8231792
    Abstract: The invention relates to a process for purifying an ionic liquid, which comprises the steps (a) partial crystallization of the ionic liquid from its melt and (b) separation of the crystals from the residual melt.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: July 31, 2012
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Fiene, Harald Rust, Klemens Massonne, Veit Stegmann, Oliver Huttenloch, Jörg Heilek
  • Patent number: 8021441
    Abstract: A method of vaporizing a solid organometallic compound in which the method comprises filling the solid organometallic compound into a container, introducing a carrier gas to the container and taking out the gas containing the organometallic compound, wherein the solid organometallic compound is in the form of pellets and contains an inert support.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: September 20, 2011
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Katsumi Inui, Naoyuki Ide, Motoki Takahashi
  • Patent number: 7993416
    Abstract: The present invention generally relates to encapsulation of crystallization solutions in pierceable reservoirs in order to prevent evaporation of the crystallization solutions, thereby allowing safe transport/shipping, from a workstation to another workstation, and safe storage of pre-filled microplates used to carry large number of vapor-diffusion crystallization experiments.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: August 9, 2011
    Assignee: Qiagen Canada Inc.
    Inventors: Jean-Pascal Viola, Christian Houde, Marie-Claude Marchand, David Bouchard
  • Patent number: 7972390
    Abstract: This invention relates to novel methods for affecting, and/or directing various crystal formation, structure formation or phase formation/phase change reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a crystallization reaction system. In a second aspect of the invention, at least one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other (or all) crystallization reaction system participants being introduced into the reaction vessel.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: July 5, 2011
    Assignee: GR Intellectual Reserve, LLC
    Inventors: Bentley J. Blum, Juliana H. J. Brooks, Mark G. Mortenson
  • Patent number: 7901466
    Abstract: The invention relates to a method for preparing a suspension containing phosphate stepwise directly from raw materials, from phosphoric acid of fertilizer quality, a base and organic additives. In accordance with the method, the phosphoric acid is preneutralised with the base, the organic additives are added, nucleation is controlled and phosphate salts are cooling crystallised in order to form a suspension. The phosphate suspension prepared with the method of the invention is applicable to seed coating.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: March 8, 2011
    Assignee: Yara Suomi Oy
    Inventors: Eija Saarikko, Juhani Poukari, Paula Ylinen, Anders Weckman
  • Patent number: 7883551
    Abstract: The present invention is directed to a crystallization process and apparatuses for such processes. In a first aspect, the process of the invention comprises a step wherein a liquid comprising a solvent and material dissolved therein, is subjected to crystallization conditions in the presence of Dean vortices, which Dean vortices result from said liquid flowing through a channel having at least one curvature. In a second aspect, the invention is directed to a crystallization process, which comprises a step wherein a liquid comprising a solvent, material dissolved therein and heterogeneous particles is subjected to crystallization conditions in the presence of Dean vortices, which Dean vortices result from said liquid flowing through a channel having at least one curvature, wherein said material crystallizes on solid surfaces, in particular on surfaces of the heterogeneous particles present in the feed.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: February 8, 2011
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO
    Inventors: Dirk Verdoes, Earl Lawrence Vincent Goetheer, Zhuo Hornstra-Xu, Jan Izaak Walpot
  • Patent number: 7879115
    Abstract: Applying a strong static DC electric field to supersaturated aqueous glycine solutions resulted in the nucleation of the ? polymorph attributed to the electric-field induced orientation of the highly polar glycine molecules in large preexisting solute clusters, helping them organize into a crystalline structure. A method to induce crystallization and to prepare polymorphs and/or morphologies of materials by using a static electric field to cause nucleation and crystal growth to occur in a supersaturated solution in such a way as to obtain a crystal structure that would not normally appear without the use of the static electric field. Aqueous glycine solutions were prepared by combining solid glycine and water. Supersaturated solutions were generated by heating the tubes to 62-64° C. and holding them at that temperature in an ultrasonicator overnight. Once the glycine was completely dissolved, the solutions were slowly cooled to room temperature.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: February 1, 2011
    Assignee: Intellectual Ventures Holding 19, LLC
    Inventors: Bruce A. Garetz, Allan S. Myerson, Stephen Arnold, Janice E. Aber
  • Patent number: 7875086
    Abstract: The present invention is a method for simultaneously separating two highly pure fullerenes from a mixture of fullerenes via crystallization, by (i) adjusting the amount of solvent in the mixture fed to a first crystallizer to obtain a phase equilibrium behavior so a first fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; (ii) adjusting the amount of solvent in another mixture fed to a second crystallizer, operating at a temperature different from the first crystallizer, to obtain a phase equilibrium behavior so a second fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; and additionally (iii) purifying the solid solution or the solvate into highly pure fullerene, when the solid product from the crystallizers is in the form of solid solution or solvate.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: January 25, 2011
    Assignee: The Hong Kong University of Science and Technology
    Inventor: Ka Ming Ng
  • Patent number: 7771493
    Abstract: A process for crystallizing amorphous polymers whose Tg lies below the crystallite melting point. According to this process, amorphous or partially crystalline polymer grains are exposed in water for a period of at least 30 seconds to a temperature in the polymer crystallization range.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: August 10, 2010
    Assignee: Treofan Germany GmbH & Co. KG
    Inventors: Detlef Busch, Harald Eiden, Bertram Schmidt
  • Patent number: 7771494
    Abstract: Processes for the preparation, concentration and recovery an N-(phosphonomethyl)glycine product from aqueous process streams including contacting mother liquor generated in the precipitation of N-(phosphonomethyl)glycine product crystals with a selective membrane to produce a retentate enriched N-(phosphonomethyl)glycine product and a permeate depleted in N-(phosphonomethyl)glycine product are disclosed.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: August 10, 2010
    Assignee: Monsanto Technology LLC
    Inventors: Sunder Rangachari, Ed Ries, Eduardo Casanova, Randall Alberts, Todd Friedman, Greg Hartmann
  • Patent number: 7641932
    Abstract: Production of a phosphate mixture for brines used in the food industry, which comprises a) 60 to 85 weight % of a clear soluble potassiumtripolyphosphate (KTPP) with a P2O5 content of 46.0 weight % to 47.0 weight % and a K2O/P2O5 mole ratio of 1.7 to 1.78, b) 15 to 39 weight % sodiumpolyphosphate, c) 1 to 5 weigth % MxH3-xPO4, with M=Na, K and x=1,2,3 and/or MxH4-xP2O7, in which M=Na and x=2,3,4 and when M=K then x=4; wherein the phosphate mixture has a pH value of 8 to 10 and exhibits a turbidity in water and brines of <5 TE/F.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: January 5, 2010
    Assignee: B.K. Giulini GmbH
    Inventors: Richard Tänzler, Bernd Krug, Frank Neumann, Peter Braun, Ulrike Fischer-Nägele
  • Patent number: 7540884
    Abstract: A process for purifying removal of crystals from their suspension in mother liquor by means of a washing column having forced transport in which the process chamber is encased by a metal wall which, on its side facing away from the process chamber, is heated at least along the length of the pure melt zone.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: June 2, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Hammon, Dieter Baumann, Joerg Heilek, Klaus Joachim Mueller-Engel, Bernd Eck
  • Patent number: 7531023
    Abstract: The invention relates to a method for the purification of a molten metal containing one or more foreign elements. The molten metal is cooled to a eutectic temperature to simultaneously form purified metal crystals and crystals containing at least one foreign element, and at least some of the crystals containing at least one foreign element are separated from the purified metal crystals by using a solid-solid separation technique.
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: May 12, 2009
    Assignee: Aleris Switzerland GmbH
    Inventor: Paul Alexander De Vries
  • Patent number: 7150766
    Abstract: The invention provides a method for forming particles of a target substance, comprising (a) co-introducing into a particle formation vessel, under controlled temperature and pressure, a supercritical or near-critical anti-solvent fluid; a first target substance in a first vehicle; and a second target substance in a second vehicle; and (b) using the anti-solvent to disperse the target substances in their respective vehicles and to extract the vehicles, substantially simultaneously and substantially immediately on introduction of the fluids into the particle formation vessel. The second vehicle is immiscible with the first, and contact between the first and second vehicles occurs a sufficiently short period of time before their dispersion by the anti-solvent, and with sufficient physical mixing, as to allow only insignificant, if any, phase separation to occur between the two vehicles between their contact with one another and their dispersion.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: December 19, 2006
    Assignee: Nektar Therapeutics UK, Ltd.
    Inventors: Mazen H. Hanna, Peter York
  • Patent number: 7001526
    Abstract: Methods for separation of two optical isomers in a racemate into its constituent isomers by statistical means are described, whereby the saturated racemate solution is first allotted into small samples by means of microfluidic or inkjet techniques to obtain small sample quantities (picoliters to microliters) with one isomer in measurable excess of the other. The samples are then tested by means of spectrophotometers used for measuring Cotton Effects or Circular Dichroism or other related effects which measure the difference in the absorption of right and left circularly polarized light, so that there is a predetermined minimum excess of one enantiomer. Collecting them in three different receptacles then separates the three types of samples. The right and left excess samples are then used in the crystallization process to obtain right or left handed isomers respectively.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: February 21, 2006
    Inventor: Hla Ngwe Tin
  • Patent number: 6860907
    Abstract: The invention provides a method for forming particles of a target substance, comprising (a) co-introducing into a particle formation vessel, under controlled temperature and pressure, a supercritical or near-critical anti-solvent fluid; a “target solution or suspension” of the target in a first vehicle; and a second vehicle which is soluble in the anti-solvent fluid; and (b) using the anti-solvent to disperse the target solution/suspension and the second vehicle, and to extract the vehicles, substantially simultaneously and substantially immediately on introduction of the fluids into the particle formation vessel, wherein the second vehicle is immiscible with the first, and wherein contact between the target solution/suspension and the second vehicle occurs a sufficiently short period of time before their dispersion by the anti-solvent, and with sufficient physical mixing, as to allow only insignificant, if any, phase separation to occur between the two vehicles between their contact with one another and thei
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: March 1, 2005
    Assignee: Nektar Therapeutica
    Inventors: Mazen H. Hanna, Peter York
  • Patent number: 6855176
    Abstract: 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: Grant
    Filed: March 8, 2000
    Date of Patent: February 15, 2005
    Assignee: Reuter Chemische Apparatebau KG [DE/DE]
    Inventor: Karl Reuter
  • Publication number: 20030095912
    Abstract: A process for recovering sodium carbonate decahydrate crystals from solutions and mother liquors supersaturated in sodium bicarbonate concentration. Feed liquors containing higher levels of sodium bicarbonate than traditionally fed to a sodium carbonate decahydrate crystallizer are used to create a mother liquor within a sodium carbonate decahydrate crystallizer that is supersaturated with respect to sodium bicarbonate. Substantially pure sodium carbonate decahydrate crystals may be precipitated from the supersaturated mother liquor without substantially precipitation of sodium bicarbonate containing crystals.
    Type: Application
    Filed: November 18, 2002
    Publication date: May 22, 2003
    Inventor: William C. Copenhafer
  • Patent number: 6558434
    Abstract: A method for cooling is provided which makes use of materials which undergo a pressure induced structural phase transition such that the material's crystal field interaction changes, and which colds down during this phase transition. This effect is used for cooling objects which are thermally coupled to the material.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: May 6, 2003
    Inventors: Albert Furrer, Karl Alexander Müller, Joël Mesot
  • Patent number: 6428583
    Abstract: 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: Grant
    Filed: April 27, 2000
    Date of Patent: August 6, 2002
    Assignee: Reuter Chemische Apparatebau KG
    Inventor: Karl Reuter
  • Patent number: 6364914
    Abstract: 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: Grant
    Filed: March 19, 1999
    Date of Patent: April 2, 2002
    Assignee: Ajinomoto Co., Inc.
    Inventors: Hiroshi Ueda, Hiroshi Fukushi, Muneyuki Ozawa
  • Publication number: 20010003224
    Abstract: A process for preparing a powdery alkyl sulfate, comprising drying aqueous slurry having a solid content of 60 to 85% by weight and containing an alkyl sulfate and an alkali metal carbonate in a ratio of 0.05 to 10 parts by weight of the alkali metal carbonate based on 100 parts by weight of the alkyl sulfate. This process is capable of stably preparing a powdery alkyl sulfate without deteriorating the quality of aqueous slurry of an alkyl sulfate and powder obtainable from the aqueous slurry.
    Type: Application
    Filed: November 29, 2000
    Publication date: June 14, 2001
    Inventors: Futoshi Nishigaki, Osamu Tabata
  • Patent number: 6180074
    Abstract: A method for removing contaminants, such as sulfur dioxide, mercury and hydrochloric acid, out of flue gases is provided, said method including the steps of: treating the flue gases with a reagent, such as sodium carbonate, sodium bicarbonate and ammonium salts or mixtures thereof; selectively dissolving the sodium phosphates produced thereby in water; separating out the solids remaining in suspension in the solution; and crystallizing the purified sodium sulphate present in the above-mentioned solution. The sodium sulfate can be upgraded in glass working furnaces. The reagent can be obtained by heating an intermediate solution containing sodium bicarbonate; sodium carbonate; ammonium bicarbonate and ammonium carbonate, which was obtained from the Solvay process for manufacturing sodium carbonate.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: January 30, 2001
    Assignee: Novacarb
    Inventors: Fabrice Fourcot, Jean-Claude Pouxviel
  • Patent number: 6103139
    Abstract: An activator (10) made in accordance with the principles of the present invention includes activating crystals (11) that have been formed into a shape and then coated with coating (12). The activator (10) of the present invention can be used in any environment in which the solidification of a supercooled solution occurs and whereby heat is generated during the solidification process. In the preferred embodiment disclosed herein, the activator is placed inside a hot pack (15) containing a supercooled solution (16). The hot pack can be made of a container made of a thermoplastic film which is formed into a bag, filled with activator (10) and the supercooled solution (16), and sealed to form the hot pack. The coating (12) of the activator (10) is impervious to the supercooled solution (16) in the hot pack (15) and into which the activator will be placed. The supercooled solution (16) may be any of a variety of chemical compositions known in the art which give off heat as they solidify.
    Type: Grant
    Filed: August 8, 1998
    Date of Patent: August 15, 2000
    Assignee: Allegiance Corporation
    Inventor: Dan Kohout
  • Patent number: 5755975
    Abstract: 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: Grant
    Filed: September 9, 1996
    Date of Patent: May 26, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Eck, Bernhard Maltry
  • Patent number: 5614104
    Abstract: Process for determining the sylvine saturation in which the salt concentration in the solid matter-free crude solution through temperature determination at a temperature T.sub.M >T, and subsequently after contacting with KCl at a temperature T.sub.NS >T and heating to T.sub.M, is measured again, and from this data a saturation temperature T.sub.S is obtained. The temperature difference T.sub.S -T serves as a measure for the sylvine saturation degree. In this manner, the sylvine saturation degree can automatically be measured in intervals of seconds and can serve as a control value for the addition of crude salt in a hot solution process.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: March 25, 1997
    Assignee: Kali Und Salz GmbH
    Inventors: Ivan Bakardjiev, Karl R. Wambach-Sommerhoff, Markus Cieslik, Helmut Zentgraf, Jost Gotte, Stefan Dressel
  • Patent number: 5575923
    Abstract: An improved salt basket for dewatering solids, particularly salts resulting from evaporation of industrial wastewaters. The salt basket system includes a pressurizable vessel having a screen floor situated above a bottom liquid collection head, an inlet for the brine/solids slurry from which solids are to be separated and dried, an inlet for air, an inlet for steam (the latter two inlets may be combined, where convenient), an inlet for solids free feed, and a drain outlet (these two may be combined where convenient into a combination feed/drain connection). Preferably, an automated system for introducing feed brine and for removing the solids product is provided. For safety, a pivotally attached lower door has a hydraulic failsafe closure mechanism and locking safety latches to prevent the door from inadvertently opening.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 19, 1996
    Assignee: Ionics, Incorporated
    Inventors: Robert L. Solomon, Ferris C. Standiford, Joseph Bostjancic, Dan Peterson, George R. Jones
  • Patent number: 5505924
    Abstract: A multistage process for the separation and purification of a desired crystalline material by repeated dissolution and recrystallization, wherein crystals and solvent move countercurrent to one another through the stages. A fluid temperature gradient is maintained within each recrystallization unit to make use of convection to facilitate or accelerate concurrent dissolution and recrystallization within a single vessel. Solid recrystallized material is moved from one unit to the next unit. An automated apparatus and a manually operated apparatus for carrying out the process are also described.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: April 9, 1996
    Assignee: Bicron Corporation
    Inventor: Neil M. Johnson
  • Patent number: 5448005
    Abstract: This invention is a crystallization process for p-xylene recovery. A single temperature crystallization production stage is used for producing p-xylene from a feed having an above equilibrium p-xylene concentration, such as from a toluene disproportionation process. Scavenger stages are also used to raise the p-xylene recovery rate.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: September 5, 1995
    Assignee: Mobil Oil Corporation
    Inventors: William D. Eccli, Alexander D. S. Fremuth
  • Patent number: 5447541
    Abstract: Process for separating and purifying substances by crystallization from the melt under high pressuresIn the process for separating or purifying substances by crystallization from melts or highly concentrated solutions under high pressures, gas is dissolved in the melt to be crystallized and is expelled again after the crystallization with reduction in the pressure. Still adhering or occluded impurities are thus removed.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: September 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudolf Steiner, Axel Konig, Siegbert Rittner
  • Patent number: 5447542
    Abstract: In the process for separating and purifying substances by crystallization from the melt under pressure, the melt is subjected to pressure under an inert gas atmosphere and then cooled, whereupon it crystallizes. The residual melt is separated from the resulting crystals, after which the crystals are degassed by reducing the pressure and are caused to sweat, and the sweat oil is separated off.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: September 5, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudolf Steiner, Axel Konig, Siegbert Rittner
  • Patent number: 5435919
    Abstract: Optically-active, amphiphilic, free-radical addition copolymers having an optically-active hydrophobic portion and an ionic hydrophilic portion are effective resolving agents. This utility is based on a unique combination of properties, viz., water solubility, chirality and amphiphilicity, i.e., having a dual hydrophobic and hydrophilic nature.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: July 25, 1995
    Assignee: The Dow Chemical Company
    Inventors: Mladen Ladika, Thomas E. Fisk
  • Patent number: 5433932
    Abstract: In a process for recovering an alkali metal azide from a waste gas generating material containing the alkali metal azide and a metal oxide reactable with the azide, the gas generating material is mixed with a solvent for the alkali metal azide. This produces a slurry comprising (i) a solution comprising the solvent and the alkali metal azide, and (ii) the metal oxide. The slurry is separated into a liquid stream comprising primarily the solution and a sludge stream comprising primarily the metal oxide. The liquid stream is filtered in a filter to produce a filtrate which is substantially free of metal oxide and is then concentrated by evaporation of the solvent to produce crystals of the alkali metal azide. The separation may be carried out by a filter or centrifuge to produce a filter or centrifuge cake. The sludge obtained from the slurry is reslurried to recover additional azide, and the resulting slurry is again separated into a sludge and a liquid stream by a filter or centrifuge.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: July 18, 1995
    Assignee: TRW Vehicle Safety Systems Inc.
    Inventors: John F. Clausen, Christopher C. Shih
  • Patent number: 5332674
    Abstract: A process is described for separating the optical isomers of 1,2-isopropylideneglycerol, of formula (I), comprising partially stereoselective enzymatic hydrolysis of 1,2-isopropylideneglycerol benzoyl ester (II) catalyzed by a free or immobilized lipase, the hydrolysis being conducted in the presence of a cosolvent and followed by crystallization enabling crystals of (II) in raceme form and mother liquor containing (II) in the form of the pure enantiomer to be selectively obtained.The compound (I) is widely used industrially as an intermediate in the synthesis of chiral drugs such as (R)-(-)-carnitine, (S)-beta-blockers, (S)-antiviral agents, analgesic drugs etc.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: July 26, 1994
    Assignee: Ministero Dell'Universita' E Della Ricerca Scientifica E Tecnologica
    Inventors: Daniele Bianchi, Aldo Bosetti, Pietro Cesti, Paolo Golini, Carlo Pina
  • Patent number: 5240467
    Abstract: A multistage process for the separation and purification of a desired crystalline material by repeated dissolution and recrystallization, wherein crystals and solvent move countercurrent to one another through the stages. A fluid temperature gradient is maintained within each recrystallization unit to make use of convection to facilitate or accelerate concurrent dissolution and recrystallization within a single vessel. Solid recrystallized material is moved from one unit to the next unit. An automated apparatus and a manually operated apparatus for carrying out the process are also described.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: August 31, 1993
    Assignee: Bicron Corporation
    Inventor: Neil M. Johnson
  • Patent number: 5230769
    Abstract: A process is provided for the separation of substances by melt crystallization. The organic mixtures which are difficult to crystallize are heated to a temperature sufficient to obtain a melt with the melt then being moved through a three-dimensional crystallization matrix having a large specific area. The melt is slowly cooled over a temperature range so as to achieve a selective crystallization from the supersaturated melt in the carrier matrix. A deposited crystal phase is thereafter melted and separated from the carrier matrix and removed by centrifugation. The carrier matrix may have a crystallization-promoting microstructure surface and may consist of an openpored foam.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: July 27, 1993
    Assignee: Sulzer Brothers Limited
    Inventors: Slobodan Jancic, Evangelos Sakellariou