Physical Separation Agents Patents (Class 252/60)
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Patent number: 5615862Abstract: A powdered composition for treating spent dry film stripping and/or developing solutions comprising: 10 to 70 percent by weight of an aluminum source, such as aluminum sulfate, aluminum chloride; and 28 to 90 percent by weight of siliceous particulates, such as diatomaceous earth, sodium potassium aluminum silicate or expanded perlite. The powdered composition may also include 3 to 35 percent by weight of a metal precipitation agent, such as trimercapto-s-triazine, sodium dimethyldithiocarbamate, starch xanthate, sodium diethydithiocarbamate and thio red, to precipitate the metal from the spent solutions and/or 0 to 10 percent by weight of a dust-suppression agent such as water or propylene glycol. A method of using the disclosed compositions is also revealed in this application.Type: GrantFiled: February 2, 1995Date of Patent: April 1, 1997Inventor: Robert M. Gaudette
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Patent number: 5560860Abstract: A composition for reclaiming paint and volatile organic paint carrier from industrial paint spray booths without increasing VOCs has been developed. The improvement over the existing booths recirculating hydrophilic based fluids, is the inclusion of a water based solution containing about 10 to about 45 per cent by weight of one or more N-alkyl pyrrolidones, about 15 to 40 percent by weight of one or more alkyl glycol mono alkyl ethers, a surfactant present in the amount of about 0.1 to 2.0 percent by weight, and the balance water.Type: GrantFiled: January 11, 1995Date of Patent: October 1, 1996Assignee: BASF CorporationInventors: William C. Walsh, Lawrence E. James
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Patent number: 5556557Abstract: A polyester is provided which facilitates the separation of blood into light and heavy phases via centrifugation in a blood collection vessel. The polyester is useful as a component of a partitioning composition formulated to have appropriate specific gravity to be positioned intermediate the light and heavy blood phases during centrifugation. A partitioning composition including a polyester of the invention provides a particular advantage in blood collection vessels due to its lighter and more consistent coloration. The polyester composition can be prepared with relative ease compared to prior art polyesters useful in blood partitioning compositions.Type: GrantFiled: June 5, 1995Date of Patent: September 17, 1996Assignee: Henkel CorporationInventors: William L. O'Brien, Alan C. Kilbarger
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Patent number: 5547577Abstract: Gel formulations including a polydimethylsiloxane-polyethyleneoxide copolymer gelled with dibenzylidine sorbitol in the presence of water or alcohol, The gel formulations are useful for facilitating the separation of blood serum or plasma from the cellular portion of blood or as a thermoreversible shear sensitive substance.Type: GrantFiled: May 22, 1995Date of Patent: August 20, 1996Assignee: Becton, Dickinson and CompanyInventors: Erwin A. Vogler, Thomas A. Shepard, Jane C. Graper
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Patent number: 5543048Abstract: A blood collection assembly with gel formulations including a polydimethylsiloxane-polyethyleneoxide copolymer gelled with dibenzylidine sorbitol in the presence of water or alcohol. The gel formulations are useful for facilitating the separation of blood serum or plasma from the cellular portion of blood or as a thermoreversible shear sensitive substance.Type: GrantFiled: May 17, 1995Date of Patent: August 6, 1996Assignee: Becton, Dickinson and CompanyInventors: Erwin A. Vogler, Thomas A. Shepard, Jane C. Graper
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Patent number: 5527843Abstract: A blood separating composition for use in blood collection tubes, the composition having an absolute viscosity of 100,000-320,000 cP at 25.degree. C. at a shear rate of 1 sec.sup.-1 when the blood separating composition turns into its dynamic state from its stationary state, with a reduced viscosity of 50,000 cP or more at a shear rate of 10 sec.sup.-1 in the dynamic state. The absolute viscosity of said composition is 100,000-300,000 cP at the shear rate of 1 sec.sup.-1 when returning to the stationary state. Such a viscosity renders stable and less flowable and blood separating composition during storage, allowing it to form a stable partition barrier in each collection tube when centrifuged to separate the blood phases one from another, with the blood cells above the barrier being prevented from remaining within the serum. The blood separating composition does not release any harmful oily substance or the like.Type: GrantFiled: July 20, 1994Date of Patent: June 18, 1996Assignee: Nissho CorporationInventors: Kazunori Murakmi, Hiroshi Sudo, Kazumi Sakurai, Hitoshi Tanaka
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Patent number: 5525227Abstract: Method for forming blood compatible, shear sensitive gel formulations including a polydimethylsiloxane-polyethyleneoxide copolymer gelled with dibenzylidine sorbitol in the presence of water or alcohol. The gel formulations are useful for facilitating the separation of blood serum or plasma from the cellular portion of blood or as a thermoreversible shear sensitive substance.Type: GrantFiled: May 17, 1995Date of Patent: June 11, 1996Assignee: Becton, Dickinson and CompanyInventors: Erwin A. Vogler, Thomas A. Shepard, Jane C. Graper
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Patent number: 5518615Abstract: Gel formulations including a polydimethylsiloxane-polyethyleneoxide copolymer gelled with dibenzylidine sorbitol in the presence of water or alcohol. The gel formulations are useful for facilitating the separation of blood serum or plasma from the cellular portion of blood or as a thermoreversible shear sensitive substance.Type: GrantFiled: April 22, 1994Date of Patent: May 21, 1996Assignee: Becton, Dickinson and CompanyInventors: Erwin A. Vogler, Thomas A. Shepard, Jane C. Graper
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Patent number: 5510237Abstract: The invention provides a serum or plasma separating composition which comprises a cyclopentadiene resin, a viscosity adjusting agent and an organic gelling agent. The composition is characterized in that the cyclopentadiene resin is a liquid resin at a temperature of 25.degree. C., the viscosity adjusting agent being a liquid ester obtained from propionic acid, butyric acid, benzoic acid or phthalic acid, the organic gelling agent being a condensation product of sorbitol and an aromatic aldehyde, the composition containing 0.8 to 25 parts by weight of the viscosity adjusting agent and 0.03 to 0.9 part by weight of the organic gelling agent per 100 parts by weight of the cyclopentadiene resin. The composition forms a satisfactory separating layer even when subjected to a centrifugal separation operation at a set temperature of 4.degree. C.Type: GrantFiled: February 21, 1995Date of Patent: April 23, 1996Assignee: Sekisui Chemical Co., Ltd.Inventors: Hironobu Isogawa, Hideo Anraku
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Patent number: 5505853Abstract: A serum:plasma separator is provided containing a tackifier having a softening point of 70.degree. to 150.degree. C. and a partition-forming material. The separator prevents hemocyte from remaining in a serum portion after blood separation and prevents migration of a component having a concentration gradient between clot and serum, even when separated blood components are stored as they are in place in a tube for the separation of blood, whereby correct examination results can be obtained. The serum:plasma separator hardly undergoes a form change at room temperature and under heat and hardly shows a viscosity change even after a long period of time. Further, the serum:plasma separator has an excellent thixotropic nature free from a change in temperature, excellent cohesion and excellent adhesion to a blood separation tube. There is also provided a tube for the separation of serum:plasma from clot;hemocyte, which contains the above serum:plasma separator.Type: GrantFiled: November 14, 1994Date of Patent: April 9, 1996Assignee: Toyo Ink Manufacturing Co., Ltd.Inventor: Sunao Satake
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Patent number: 5487842Abstract: N-ethyl alkanohydroxamic acids, where said alkyl group is a straight chain alkyl group of 8 to 10 carbon atoms, or a branched alkyl group of 8 to 25 carbon atoms, provided said alkyl group is not cyclic, useful as metal chelants for use in organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted metal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentrations into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhibit rapid phase separation from aqueous solutions, good hydrolytic stability and resistance to forming emulsions.Type: GrantFiled: July 11, 1994Date of Patent: January 30, 1996Assignee: Met-Tech Systems LimitedInventor: Bruce F. Monzyk
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Patent number: 5438000Abstract: A serum separating sealant having a specific gravity at 20.degree. C. of 1.035 to 1.065, a viscosity of 100 to 400 Pa.S and a yield stress of 100 to 400 dyne/cm.sup.2 and comprising:(A) 100 parts by weight of a polymer having specific gravity at 20.degree. C. of 0.94 to 1.06 and a viscosity of 10 to 140 Pa.S, derived from an alkyl acrylate or alkyl methacrylate monomer having the formula (I): ##STR1## wherein R.sup.1 denotes H or CH.sub.3, R.sup.2 denotes an alkyl group having 1 to 18 carbon atoms;(B) 0.5 to 10 parts by weight of at least one component selected from silica and bentonite; and(C) 0.01 to 2 parts by weight of at least one surfactant selected from the group consisting of:(C-1) fluorocarbon-based surfactants;(C-2) polyester modified alkylpolysiloxane based surfactants.Type: GrantFiled: November 12, 1993Date of Patent: August 1, 1995Assignee: Nippon Paint Co., Ltd.Inventors: Ronald Legario, Toshiomi Nakamura, Toshiko Shibata
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Patent number: 5387355Abstract: A composition and method for the improved deinking of groundwood newsprint is disclosed. The composition comprises an amount, effective for the intended purpose, of: 1) an anionic surfactant, e.g., the ammonium or sodium salts of a sulfated ethoxylate derived from a 12 to 14 carbon linear primary alcohol blend, and 2) a dispersant, e.g., naphthalene-formaldehyde condensates.The method comprises administering a sufficient amount of this combined treatment to a sample of groundwood newsprint for which treatment is desired.Type: GrantFiled: January 21, 1994Date of Patent: February 7, 1995Assignee: Betz Laboratories, Inc.Inventor: Mary Beth Letscher
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Patent number: 5348160Abstract: Fine particle coal is beneficiated in specially designed dense medium cyclones to improve particle acceleration and enhance separation efficiency. Raw coal feed is first sized to remove fine coal particles. The coarse fraction is then separated into clean coal, middlings, and refuse. Middlings are comminuted for beneficiation with the fine fraction. The fine fraction is deslimed in a countercurrent cyclone circuit and then separated as multiple fractions of different size specifications in dense medium cyclones. The dense medium contains ultra-fine magnetite particles of a narrow size distribution which aid separation and improves magnetite recovery. Magnetite is recovered from each separated fraction independently, with non-magnetic effluent water from one fraction diluting feed to a smaller-size fraction, and improving both overall coal and magnetite recovery.Type: GrantFiled: December 9, 1992Date of Patent: September 20, 1994Assignee: Genesis Research CorporationInventor: James K. Kindig
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Patent number: 5342538Abstract: A flocculating agent which comprises: a particulate polyethylene oxide; an inert liquid vehicle comprising a mixture of a glycol and glycerine, wherein the specific gravity of the polyethylene oxide is approximately the same as the specific gravity of the inert liquid vehicle; a suspension agent, and, optionally, an acidic compound.Type: GrantFiled: September 9, 1992Date of Patent: August 30, 1994Assignee: Nalco Canada, Inc.Inventors: Daniel K. Chung, Steven B. Warrick
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Patent number: 5328626Abstract: N-ethyl alkanohydroxamic acids, where said alkyl group is a straight chain alkyl group of 8 to 10 carbon atoms, or a branched alkyl group of 8 to 18 carbon atoms, provided said alkyl group is not cyclic, useful as metal chelants for use in organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted metal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentrations into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhibit rapid phase separation from aqueous solutions, good hydrolytic stability and resistance to forming emulsions.Type: GrantFiled: May 29, 1992Date of Patent: July 12, 1994Assignee: Met-Tech Systems, Ltd.Inventor: Bruce F. Monzyk
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Patent number: 5304605Abstract: A blood separation composition for use in blood collection tubes. The composition comprises a fatty acid amide(s) blended with a gel-like material which is the main ingredient of said composition. The amide(s) render(s) stable and less flowable the blood separation composition during storage, allowing it to form a stable partition barrier in each collection tube when centrifuged, with the blood cells above the barrier being prevented from remaining within the serum. The blood separation composition containing the fatty acid amide(s) does not release any harmful oily substance.Type: GrantFiled: June 25, 1992Date of Patent: April 19, 1994Assignees: Nissho Corporation, Hokoku Oil Mill Co., Ltd.Inventors: Kazunori Murakami, Tetsuo Takuchi
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Patent number: 5304316Abstract: A deinking agent for regenerating waste paper, which comprises a reaction product obtained by reacting a compound having an OH group, which is represented by the following (A) or (B) with a dicarboxylic acid or an anhydride thereof as an active ingredient:(A) a compound obtained by adding ethylene oxide and propylene oxide to a higher fatty acid having 8 to 22 carbon atoms in such a manner as to control the molar ratio of ethylene oxide/propylene oxide to from 1 to 4 and to control the total amount of the added ethylene oxide and propylene oxide to from 10 to 50 moles on average; or(B) an incomplete ester of a polyhydric alcohol, to which ethylene oxide and propylene oxide have been added in such a manner as to control the molar ratio of ethylene oxide/propylene oxide to from 1 to 4 and to control the total amount of the added ethylene oxide and propylene oxide to from 10 to 50 moles per OH group on average, and a higher fatty acid having 8 to 22 carbon atoms;is disclosed.Type: GrantFiled: September 18, 1992Date of Patent: April 19, 1994Assignee: Kao CorporationInventors: Hideaki Urushibata, Koji Hamaguchi, Akio Kimura, Shigetoshi Suzue
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Patent number: 5288369Abstract: A deinking composition for use in the reclamation of waste paper consisting essentially of a mixture of higher fatty acids having 8 to 24 carbon atoms, or salts thereof, wherein the average carbon atom number of said fatty acids in said mixture ranges from 12.7 to 21.5, and wherein the content of higher fatty acids having 20 to 24 carbon atoms or salts thereof, ranges from 9.6 to 70.6% by weight, said mixture having an iodine value (IV) of not greater than 45.Type: GrantFiled: November 22, 1991Date of Patent: February 22, 1994Assignee: Kao CorporationInventors: Yoichi Ishibashi, Yoshitaka Miyauchi, Koji Hamaguchi, Hideaki Urushibata, Hiromichi Takahashi, Takanobu Shiroishi
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Patent number: 5282928Abstract: A deinking composition which shows a good deinking performance, a good defoaming property and excellent operation characteristics whereby a deinked pulp having a high whiteness and little contamination with the total remaining ink can be obtained in the reclamation of waste papers by flotation, washing or a combination procedure thereof and wherein the deinking composition comprises a reaction mixture (II), as a deinking agent, obtained by the addition reaction of alkylene oxide (D) with a mixture (I) comprising a fat and oil (A) which is constituted with a mixture of higher fatty acids (a) comprising fatty acids having 8 to 24 carbon atoms; having an average carbon atom number of from 12.7 to 22.5; containing from 9.6 to 70.Type: GrantFiled: May 29, 1992Date of Patent: February 1, 1994Assignee: Kao CorporationInventors: Hiromichi Takahashi, Yoichi Ishibashi, Yoshitaka Miyauchi, Takanobu Shiroishi, Yoshinao Kono
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Patent number: 5281348Abstract: A composition and method for the improved deinking of groundwood newsprint is disclosed. The composition comprises an amount, effective for the intended purpose, of: 1) an anionic surfactant, e.g., the ammonium or sodium salts of a sulfated ethoxylate derived from a 12 to 14 carbon linear primary alcohol blend, and 2) a dispersant, e.g., naphthalene-formaldehyde condensates. The method comprises administering a sufficient amount of this combined treatment to a sample of groundwood newsprint for which treatment is desired.Type: GrantFiled: November 12, 1991Date of Patent: January 25, 1994Assignee: Betz PaperChem, Inc.Inventor: Mary Beth Letscher
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Patent number: 5281358Abstract: A deinking agent comprising an ester mixture as the active ingredient, wherein the ester mixture is obtained by adding ethylene oxide and propylene oxide to a mixture obtained by reacting a natural fat or a reaction product, obtained by preliminarily reacting a natural fat with glycerol, with a monohydric or dihydric alcohol in such a manner as to give a molar ratio of the alcohol to the glycerol in the natural fat of from 0.02/1 to 1/1. By using the deinking agent of the present invention, a less sticky deinked pulp can be obtained without any foaming troubles or dulling.Type: GrantFiled: August 20, 1991Date of Patent: January 25, 1994Assignee: Kao CorporationInventors: Hideaki Urushibata, Koji Hamaguchi, Hiroyoshi Hiramatsu, Yoshitaka Miyauchi
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Patent number: 5259969Abstract: Deinking of impact and nonimpact printed paper is accomplished by repulping and defibering the printed paper in an alkali aqueous medium containing a deinking chemical to form an ink pulp medium. The presence of the deinking chemical causes separation of ink particles from the printed paper fibers. Removal of the ink particles from the ink pulp medium is accomplished by screening, flotation, forward cleaning, reverse cleaning, washing and mechanical dispersion procedures to produce a substantially ink free pulp medium. This substantially ink free pulp medium has a speck removal and brightness level sufficient to produce a high-grade recyclable grade paper product. The invention provides a deinking composition comprised of a mixture of one or more solvents, and nonionic and anionic surfactants, capable of high ink removal from all types of impact and nonimpact printed paper.Type: GrantFiled: September 16, 1991Date of Patent: November 9, 1993Assignee: International Paper CompanyInventors: Narendra R. Srivatsa, Richard R. Wesolowski, Dennis J. Kerstanski
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Water clarification composition containing a water clarifier component and a floc modifier component
Patent number: 5190683Abstract: Materials such as amines, alcohols, aminoalcohols, ethers and mixtures thereof, including halogenated adducts thereof, have been found to be useful floc modifiers for water clarifiers to form an effective overall water clarifier composition. The water clarifier portion of the composition is a dithiocarbamate. The floc modifier of a particular water clarifier composition need not be the same compound that is reacted with carbon disulfide (CS.sub.2) to make the water clarifier portion of the novel compositions.Type: GrantFiled: June 19, 1990Date of Patent: March 2, 1993Assignee: Baker Hughes IncorporatedInventors: Eric J. Evain, Hartley H. Downs, Daniel K. Durham -
Patent number: 5178848Abstract: Lithium metatungstate as a new composition of matter and the production thereof are disclosed. A solution of lithium monotungstate is treated with an extractant to remove sufficient lithium ions to produce a dilute solution of lithium metatungstate and the dilute solution is then concentrated. Lithium metatungstate solutions are more dense than other alkali metal metatungstates and have lower viscosities which properties make the solutions highly useful for heavy media separations.Type: GrantFiled: June 25, 1991Date of Patent: January 12, 1993Assignee: BHP-Utah International Corp.Inventors: Willem P. C. Duyvesteyn, Houyuan Liu, Nicholas L. Labao, Purusotam L. Shrestha
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Patent number: 5174917Abstract: N-ethyl hydroxamic acids, preferably containing at least 10 carbon atoms, useful as metal chelants for use in organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted metal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentrations into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhibit rapid phase separation from aqueous solutions and resistance to forming emulsions.Type: GrantFiled: July 19, 1991Date of Patent: December 29, 1992Assignee: Monsanto CompanyInventor: Bruce F. Monzyk
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Patent number: 5173208Abstract: A flocculating agent which comprises: a particulate ethylene oxide polymer present in an amount of between about 20 to about 35% by weight; an inert liquid vehicle comprising a mixture of a glycol which is present in an amount between about 25 to about 30% by weight, and glycerine which is present in an amount between about 45 to about 50% by weight, wherein the specific gravity of the ethylene oxide polymer is approximately the same as the specific gravity of the inert liquid vehicle; and a suspension agent which is present in an amount between about 0.4 to about 0.6% by weight, wherein the flocculating agent has a viscosity in the range between about 1800 to about 5900 cps.Type: GrantFiled: June 17, 1991Date of Patent: December 22, 1992Assignee: Nalco Canada Inc.Inventors: Daniel K. Chung, Stephen B. Warrick
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Patent number: 5169543Abstract: A serum separation sealant containing 0.1 to 20 parts by weight of fine resin particles having an average particle size of 0.01 to 2 .mu.m and having an internal crosslinking density of 0.1 to 3 mmol/g and 100 parts by weight of a gelatinous material.Type: GrantFiled: March 27, 1990Date of Patent: December 8, 1992Assignee: Nippon Paint Co., Ltd.Inventor: Toshiko Shibata
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Patent number: 5167849Abstract: The present invention provides a flocculation and/or fixing agent for paper sizing in the weakly acidic to weakly alkaline pH range, wherein it contains or consists to a preponderant amount of a mixture and/or a co-condensation product of the components cationic dicyandiamide resin and polyaluminium hydroxy compound.The present invention also provides processes for the production of this agent.Type: GrantFiled: December 17, 1991Date of Patent: December 1, 1992Assignee: SKW Trostberg AktiengesellschaftInventors: Josef Seeholzer, Joachim von Seyerl
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Patent number: 5158697Abstract: The present invention relates to an deinking agent used for reproduction of printed waste papers such as newspapers, magazines, leaflets and the like, and mainly contains one or more additives selected from the group comprising(a) additives made by adding one or more selected from alkylene oxides to at least one selected from dimer acids and polymer acids of higher unsaturated fatty acids having a carbon number of 16-20;(b) additives made by adding one or more selected from alkylene oxides to at least one selected from partial esters which are made of an alcohol having a carbon number of 1-18 and dimer acids and polymer acids of higher unsaturted fatty acids having a carbon number of 16-20;(c) additives made by adding one or more selected from alkylene oxides to one or more selected from dicarboxylic acids or dicarboxylic acid monoesters.Type: GrantFiled: August 17, 1990Date of Patent: October 27, 1992Assignee: Harima Chemicals, Inc.Inventors: Yukiyoshi Kawamori, Susumu Monno, Yoshiharu Hashiguchi, Yoshikazu Inoue, Masao Hamada
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Patent number: 5147046Abstract: A gravity separation method using iron powder is employed for subjecting a metal or ore to sink-float separation using a specific gravity liquid in which the iron powder is mixed and suspended. This gravity separation method comprises mixing and suspending the iron powder composed of fine particles having a size of 40 microns or less to form a specific gravity liquid having specific gravity within the range of 2.6 to 3.5, depending upon the intended use, and pouring various raw materials such as metals and ores into the specific gravity liquid so as to subject the raw materials to sink-float separation.Type: GrantFiled: July 30, 1990Date of Patent: September 15, 1992Assignee: Kyusyumetal Industry Co., Ltd.Inventors: Masamichi Hata, Manabu Futamata
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Patent number: 5123931Abstract: A method for the beneficiation of coal by selective agglomeration and the beneficiated coal product thereof is disclosed wherein coal, comprising impurities, is comminuted to a particle size sufficient to allow impurities contained therein to disperse in water, an aqueous slurry is formed with the comminuted coal particles, treated with a compound, such as a polysaccharide and/or disaccharide, to increase the relative hydrophilicity of hydrophilic components, and thereafter the slurry is treated with sufficient liquid agglomerant to form a coagulum comprising reduced impurity coal.Type: GrantFiled: December 6, 1990Date of Patent: June 23, 1992Assignee: The Research Foundation of State University of NYInventors: Robert J. Good, Mohan Badgujar
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Patent number: 5093019Abstract: A liquid separating agent consisting essentially of a copolymer of an .alpha.-olefin having from 6 to 20 carbon atoms and a maleic acid diester with a copolymer composition (molar ratio) such that the maleic acid diester is more than 1.4 mols relative to 1 mol of the .alpha.-olefin, said copolymer having a molecular weight within a range of from 1,000 to 30,000.Type: GrantFiled: December 4, 1989Date of Patent: March 3, 1992Assignee: Mitsubishi Kasei CorporationInventors: Toru Tagawa, Hideki Yamanouchi, Youichirou Tsuji
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Patent number: 4994393Abstract: A composition is provided for use, particularly in evacuated blood collection tubes, as a blood partitioning composition. The composition is useful in provididng cleaner serum or plasma samples for biochemical tests, including a wide range of drugs. The composition includes a balanced dual resin component which provides the desired hydrophobic property while simultaneously controlling viscosity and the specific gravity, which component is comprised of poly-alpha-pinene resin which provides good drug recovery but low density with a chlorinated hydrocarbon resin which provides the proper density level while maintaining the desired hydrophobic property of the resin blend. Thixotropic property is achieved by adding silica and network stabilizer in the composition.Type: GrantFiled: February 22, 1989Date of Patent: February 19, 1991Assignee: Becton, Dickinson and CompanyInventors: Shrikant P. Pradhan, Sheshadri Narayanan, Fu-chung Lin
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Patent number: 4990264Abstract: The present invention is directed to a dewatering aid which functions unexpectedly efficiently in the dewatering of a particulate solids slurry, e.g. mineral ore concentrate or slurry, wherein a dewatering aid is added thereto followed by filtration of the slurry. Such improved dewatering results are achieved by adding to the mineral ore slurry, an effective amount of a dewatering aid comprising an alkoxylated C.sub.6 -C.sub.11 alkanol or alkanoic acid wherein alkoxylation is conducted with propylene oxide or butylene oxide.Type: GrantFiled: October 13, 1989Date of Patent: February 5, 1991Assignee: Sherex Chemical Company, Inc.Inventors: James G. Fuller, Owen Portwood, Joe W. Cotton
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Patent number: 4985162Abstract: A dewatering composition for use in dewatering coal and other ores, comprising a sulfosuccinate, a non-ionic surfactant and a defoaming agent.Type: GrantFiled: January 6, 1989Date of Patent: January 15, 1991Assignee: Wen-Don CorporationInventor: Robert Cole
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Patent number: 4964949Abstract: A deinking composition is used for reclamation of waste paper and comprises (a) an alkylene oxide adduct to a mixture of a natural oil or fat and a polyhydric alcohol and (b-1) an alkylene oxide adduct of a higher alcohol, (b-2) a sulfate of (b-1) or (b-3) a higher fatty acid.Type: GrantFiled: June 22, 1988Date of Patent: October 23, 1990Assignee: Kao CorporationInventors: Koji Hamaguchi, Fumihiko Togashi, Yoshitaka Miyauchi
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Patent number: 4897201Abstract: A composition for promoting dewatering of granulated slag which comprises the combination of an anionic polyether sulfate surfactant with a cationic nitrogen-containing surfactant and optionally a defoaming agent, and a process for promoting dewatering of granulated slag using such composition, which are useful for preparing granulated slag having a moisture content of 4% or less as a material for cement.Type: GrantFiled: June 25, 1987Date of Patent: January 30, 1990Assignees: Katayama Chemical Works Co., Ltd., Nippon Steel CorporationInventors: Akira Yamamoto, Yasutaka Arimoto, Michio Konno
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Patent number: 4839060Abstract: Modified starch compositions and their use for flocculating mineral waste residues, particularly the red mud containing alumina liquors from bauxite residues, comprising the addition to an alumina liquor of a flocculating amount of a methylated starch which, optionally, may be hydrolyzed, or a methylated starch which is also sulfonated and, optionally, may be hydrolyzed. Preferably, the methylated starch compositions are potato and dasheen starch derivatives prepared at temperatures of about 50.degree. to about 85.degree. C.Type: GrantFiled: October 21, 1987Date of Patent: June 13, 1989Assignee: Suncor, Inc.Inventors: Raymond N. Yong, Amar J. Sethi
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Patent number: 4828720Abstract: A liquid separating agent consisting essentially of (A) a separating layer-forming material which is a polymeric oily substance selected from the group consisting of a copolymer of an .alpha.-olefin with an .alpha.,.beta.-unsaturated dicarboxylic acid diester and a copolymer of a styrene with an .alpha.,.beta. unsaturated dicarboxylic acid diester and (B) an organic gelling agent which is a condensation product of a benzaldehyde with a tetra- or higher hydric alcohol.Type: GrantFiled: February 11, 1987Date of Patent: May 9, 1989Assignee: Mitsubishi Chemical Industries LimitedInventors: Katsuhiko Kuroda, Hideki Yamanouchi
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Patent number: 4783270Abstract: Disclosed herein are a coagulant for minute mineral particles in suspension, comprising a copolymer of 0.5 to 10 mol % of 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof, 40 to 99.5 mol % of N-hydroxymethylacrylamide and 0 to 59.5 mol % of acrylamide and showing a reduced viscosity of 10 to 30 dl/g in an aqueous 1N solution of sodium chloride at a temperature of 25.degree. C. and a concentration of the copolymer of 0.1 g/dl therein, and a method for coagulating the minute mineral particles in a suspension, comprising adding the coagulant a neutral waste water.Type: GrantFiled: October 30, 1987Date of Patent: November 8, 1988Assignee: Mitsubishi Chemical Industries LimitedInventors: Yoshikazu Murao, Shigeru Sawayama, Kenji Mori
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Patent number: 4770779Abstract: An apparatus for separating blood is provided with a closed end and a thixotropic gel-like sealant with a specific gravity intermediate between the gravities of serum and clot phases. A cavity is formed on the upper surface of said sealant. The sealant consists essentially of an .alpha.-olefin-dimaleate copolymer having a viscosity from 10,000 to 120,000 c.p. (25.degree. C.), to which a viscosity-specific gravity adjusting agent is added to adjust the specific gravity to 1.035-1.055. The cavity is formed in such a size that diameter of the upper surface is from 0.15 to 0.7 times the inner diameter of the apparatus and its depth is from 0.13 to 0.65 times the thickness of said sealant.Type: GrantFiled: July 1, 1987Date of Patent: September 13, 1988Assignee: Terumo CorporationInventors: Toshiji Ichikawa, Teruko Watanabe, Yoshimitsu Asada
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Patent number: 4698171Abstract: Flocculating agents for the selective flocculation of ultrafine granulometry titanium and iron ores suspended in water, said agents being made up of polymeric or copolymeric compounds containing as the monomeric units the monomers of formula I ##STR1## wherein R.sup.1 and R.sup.2, which can be the same or different, represent a --O--CHR.sup.5 --O--bridge, or two hydroxyl groups which can also be in the form of their ether or ester derivatives, and in which formula one of the symbols R.sup.3, R.sup.4 or R.sup.5 corresponds to an atomic group containing, at a position variously spaced from the substitution site, a polymerizable system which is preferably an olefinic system activated with respect to polymerization reactions, whereas the other symbols, which can be the same or different, can be hydrogen atoms or alkyl, aryl, hydroxyl, alkoxyl, hydroxyalkyl, alkoxyalkyl, haloakyl, carbonyl, carboxyl, ester, amido, nitrilo, or sulfonic groups, or halogen atoms or nitro groups.Type: GrantFiled: January 13, 1986Date of Patent: October 6, 1987Assignee: Consiglio Nazionale Delle RicercheInventors: Vincenzo Bertini, Anna Marabini, Angela De Munno, Maria Barbaro, Marco Pocci
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Patent number: 4618461Abstract: The invention relates to novel O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamothioates) and S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamodithioate). The novel compounds of this invention are useful as collectors in the froth flotation of sulfide mineral ores.Type: GrantFiled: July 25, 1983Date of Patent: October 21, 1986Assignee: The Dow Chemical CompanyInventors: Roger W. Bergman, Harry A. Smith
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Patent number: 4595538Abstract: Tri-alkali metal di(carboxyalkyl) dithiocarbamates and triammonium-di(carboxyalkyl) dithiocarbamates which can be characterized by the formula ##STR1## wherein R and R' can be the same or different and are selected from the group consisting of alkylene radicals, preferably alkylene radicals each preferably having from 1 to 12 carbon atoms, and wherein M is selected from the group consisting of alkali metal atoms and ammonium; their use as ore flotation depressants; and a process for making these novel compositions are disclosed.Type: GrantFiled: March 4, 1985Date of Patent: June 17, 1986Assignee: Phillips Petroleum CompanyInventors: Kenneth B. Kimble, Clarence R. Bresson, Harold W. Mark
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Patent number: 4578525Abstract: A process is presented for extracting polar organic compounds, in particular lower aliphatic alcohols, out of their aqueous solutions, which is based on the use of fluids which contain a significant amount of polyoxaalkanols, polyoxaalkanediols and/or polyoxaalkanepolyols. These compounds, by virtue of their high molar masses, their low solubility in water and their good affinity for polar organic compounds, are particularly suitable for use as extractants.Type: GrantFiled: September 26, 1983Date of Patent: March 25, 1986Assignees: Krupp Industrietechnik Werk Buckau-Wolf, Starcosa GmbH, Versuchs- und Lehranstalt fur Spiritusfabrikation und Fermentationstechno logie in BerlinInventor: Harald Bruckner
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Patent number: 4568475Abstract: An improved dewatering agent for aqueous slurries of mineral concentrates comprising branched dodecylbenzene sulphonic acid used alone or in combination with sodium xylene sulphonate.Type: GrantFiled: January 22, 1985Date of Patent: February 4, 1986Assignee: Nalco Chemical CompanyInventors: William J. Roe, Jacqueline L. Perisho
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Patent number: 4557718Abstract: The separation of dissolved and/or undissolved materials having different densities or different buoyancy densities can be effected with the aid of agents comprising solutions of true metatungstates. In the case of a separation of materials having different buoyancy densities by means of a density gradient centrifugation, the agent has the form of an aqueous solution of an alkali, ammonium or alkaline earth metal metatungstate and, if desired, may be augmented by the addition of at least one low molecular weight electrolyte. The agent can have a density of up to 3.1 g.cm.sup.-3, has a low viscosity at high concentrations, and is neutral and chemically insert. In the case of a separation of water-insoluble solid mixtures of different densities, the densities of the solutions of the true metatungstates can be increased up to 4.6 g.cm.sup.-3 by adding to the solutions high density materials such as sodium tungstate or tungsten carbide of suitable grain size so as to form a suspension.Type: GrantFiled: January 3, 1984Date of Patent: December 10, 1985Inventors: Rainer Kamps, Bodo Plewinsky, Manfred Miehe, Klaus Wetz
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Patent number: 4532049Abstract: An improved dewatering agent for aqueous slurries of mineral concentrates comprising branched dodecylbenzene sulphonic acid used alone or in combination with sodium xylene sulphonate.Type: GrantFiled: May 10, 1984Date of Patent: July 30, 1985Assignee: Nalco Chemical CompanyInventors: William J. Roe, Jacqueline L. Perisho
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Patent number: 4528107Abstract: Minerals, especially coals for power generation, can be subjected to froth flotation using as a collector a liquid which contains at least 21% aromatics or at least 41% naphthenes. Improvements in froth yield and ash-in-tailings compared with commercial products are demonstrated.Type: GrantFiled: July 27, 1983Date of Patent: July 9, 1985Assignee: Coal Industry (Patents) LimitedInventors: David J. A. McCaffrey, John P. Sheppard