Additive Contains Organic Portion Patents (Class 423/268)
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Patent number: 4219590Abstract: A method for improving calcium carbonate by causing calcium carbonate particles to undergo contact reaction with an acid gas capable of reacting with calcium carbonate for finely uniformizing the calcium carbonate particle size and, at the same time, coating the surface of the calcium carbonate particles with the calcium salt of the acid of the acid gas.Type: GrantFiled: April 2, 1979Date of Patent: August 26, 1980Assignee: Shiraishi Kogyo Kaisha, Ltd.Inventors: Hiroji Shibazaki, Setsuji Edagawa, Yoshinaga Okamoto
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Patent number: 4215097Abstract: Abrasion resistant granules of sodium perborate monohydrate are made by introducing an aqueous solution containing hydrogen peroxide and an aqueous solution containing sodium metaborate simultaneously into a fluidized bed dryer which contains seeds of a size smaller than that of the desired granules. At least one surface active agent is introduced into at least one of the aqueous solutions containing hydrogen peroxide and sodium perborate. Water present in the aqueous solutions is evaporated by fluidization gas which is introduced into the fluidized bed dryer. The process produces, in one stage, granules of sodium perborate monohydrate having a high rate of dissolution, good flowability, abrasion resistance, and other desirable properties.Type: GrantFiled: April 10, 1978Date of Patent: July 29, 1980Assignee: InteroxInventors: Jean Brichard, Jean-Claude Colery
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Patent number: 4208388Abstract: The flowability of particulate lime is enhanced by treatment with effective amounts of selected fluid polymethylhydrogensiloxanes, polydimethylsiloxanes, and/or mixtures thereof.Type: GrantFiled: September 28, 1978Date of Patent: June 17, 1980Assignee: Dow Corning CorporationInventor: William R. Nicholson
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Patent number: 4201756Abstract: A coated, rounded, solid calcium hypochlorite granule is described which is comprised of granular calcium hypochlorite encapsulated with a plurality of layers of an inorganic salt other than calcium hypochlorite. The inorganic salt is admixed with sufficient alkaline material to form a coating which has a pH in dilute aqueous solution at ambient temperature of at least about nine or higher. The inorganic salt is selected from a group consisting of the chloride, chlorate, nitrate, bromide, bromate and sulfate of an alkali metal. The alkaline material is selected from the group consisting of calcium hydroxide, strontium hydroxide, barium hydroxide, magnesium hydroxide and mixtures thereof. The inorganic salt coating comprises from about 4 to about 45 percent by weight of the calcium hypochlorite granule. The coated, rounded, solid granule of this invention is highly stable and resists chemical decomposition and dusting during storage.Type: GrantFiled: October 31, 1978Date of Patent: May 6, 1980Assignee: Olin CorporationInventors: Walter C. Saeman, Noel N. Coe, John P. Faust
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Patent number: 4192756Abstract: Caking of potassium chloride and sodium chloride in the particle size range of 20 mesh and finer is inhibited by adding one or more alkaline earth or multi-valent metal salts of lignosulfonate in an amount by weight within the range of about 1% to about 20% to the potassium chloride or sodium chloride.Type: GrantFiled: November 13, 1978Date of Patent: March 11, 1980Assignee: Texas Brine CorporationInventor: Thomas C. Mondshine
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Patent number: 4159312Abstract: Surface-treated calcium carbonate powders of this invention are easy to handle and highly dispersible in water, give slurries of high concentration and are useful as pigments and various other applications.Type: GrantFiled: June 2, 1978Date of Patent: June 26, 1979Assignee: Shiraishi Kogyo Kaisha, Ltd.Inventors: Hiroji Shibazaki, Setsuji Edagawa, Hisashi Hasegawa, Satoshi Kondo, Kazuo Ohnawa
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Patent number: 4117090Abstract: A process for stabilizing dibasic calcium phosphate dihydrate against hydrolysis comprising treating an aqueous suspension of dibasic calcium phosphate dihydrate at a pH of from 5 to 10 with an azacycloalkane-2,2-diphosphonic acid of the formula ##STR1## WHEREIN N IS AN INTEGER FROM 3 TO 5, OR A WATER-SOLUBLE SALT THEREOF, IN AN AMOUNT OF FROM 0.01% TO 5% BY WEIGHT WITH REFERENCE TO THE DIBASIC CALCIUM PHOSPHATE DIHYDRATE; AS WELL AS TOOTH CLEANING PREPARATIONS CONTAINING THE STABILIZED DIBASIC CALCIUM PHOSPHATE DIHYDRATE.Type: GrantFiled: December 1, 1975Date of Patent: September 26, 1978Assignee: Henkel Kommanditgesellschaft auf AktienInventor: Walter Ploger
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Patent number: 4117086Abstract: A process for stabilizing dibasic calcium phosphate dihydrate against hydrolysis comprising treating an aqueous suspension of dibasic calcium phosphate dihydrate at a pH of from 5 to 10 with 3-amino-1-hydroxypropane-1,1-diphosphonic acid, or a water-soluble salt thereof, in an amount of from 0.01 to 5% by weight with reference to the dibasic calcium phosphate dihydrate; as well as tooth cleaning preparations containing the stabilized dibasic calcium phosphate dihydrate.Type: GrantFiled: December 1, 1975Date of Patent: September 26, 1978Assignee: Henkel Kommanditgesellschaft auf AktienInventor: Walter Ploger
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Patent number: 4108960Abstract: Anhydrous metal dithionite compositions are stabilized by 0.1 to 5% by weight of the composition of one or more of vanillin, ethyl vanillin and benzoin.Type: GrantFiled: August 30, 1976Date of Patent: August 22, 1978Assignee: BOC LimitedInventor: Roland Albert Leigh
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Patent number: 4107274Abstract: Caking of industrial alkali metal chlorides and mixtures containing them in storage is prevented and a flowable product is obtained by adding a hydrophilic and/or a hydrophobic material, in combination with a complex iron cyanide, on a hydroxyl group containing carrier to produce a permanent moisture content of at least 0.01 weight percent of water on the salt.Type: GrantFiled: April 29, 1977Date of Patent: August 15, 1978Assignee: Duetsche Gold- und Silber-Scheideanstalt vormals RoesslerInventors: Helmut Knorre, Joachim Fischer, Gerhard Pohl
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Patent number: 4051228Abstract: Caking of industrial alkali metal chlorides and mixtures containing them in storage is prevented and a flowable product is obtained by adding a hydrophilic and/or a hydrophobic material, in combination with a complex iron cyanide, on a hydroxyl group containing carrier to produce a permanent moisture content of at least 0.01 weight percent of water on the salt.Type: GrantFiled: May 20, 1975Date of Patent: September 27, 1977Assignee: Deutsch Gold-und Silber-ScheideanstaltInventors: Helmut Knorre, Joachim Fischer, Gerhard Pohl
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Patent number: 4026991Abstract: There is provided a process for stabilizing lime mud so as to eliminate balling during calcination of the same by incorporating a surface active agent decomposable at a temperature below 1500.degree. F into lime mud comprising calcium carbonate, filtering said treated lime mud, and thereafter calcining said treated lime mud to recover calcium oxide absent any balling during calcination.Type: GrantFiled: July 12, 1976Date of Patent: May 31, 1977Assignee: American Cyanamid CompanyInventor: Ralph Joseph Chamberlain
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Patent number: 4001378Abstract: Composition of matter and process effecting a nitrogen-containing material that flows freely and resists caking even on prolonged storage. It can be manufactured to yield a desired percent nitrogen upon analysis characterized by the nitrogen-containing material in its normal manufactured form having on the external surface thereof an amount that is sufficient to reduce its normal caking tendencies an alkene sulfonate containing from 6 to 26 carbon atoms, inclusive. Further reduced caking tendency is effected by including on the surface of the nitrogen-containing material an inert material, such as clay. Also disclosed are the effective and optimum amounts of the respective materials that are added, the amounts being given as an average percent by weight basis.Type: GrantFiled: November 12, 1975Date of Patent: January 4, 1977Assignee: Petrochemicals Company, Inc.Inventor: John J. Jasnosz
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Patent number: 3987077Abstract: An aqueous solution is prepared by: (a) admixing nitrilotriacetonitrile and aqueous hydrochloric acid to form a first mixture; (b) reacting the nitrilotriacetonitrile and the hydrochloric acid components of the first mixture at 25.degree.-70.degree. C to form a second mixture; and (c) adjusting the pH of the second mixture to about 3-7 by admixing the second mixture and sodium hydroxide, potassium hydroxide, or ammonia to form the aqueous solution. Said solution is useful for reducing the caking tendency of particulate sodium chloride. Said solution is also useful as an additive to systems in which potassium chloride is to be separated from sodium chloride by froth flotation. Said solution is also useful as an inhibitor for inhibiting the crystallization of sodium chloride from brines, including brines encountered in oil well operations.Type: GrantFiled: June 16, 1975Date of Patent: October 19, 1976Assignee: W. R. Grace & Co.Inventors: Robert Wright Bragdon, Jon Carl Thunberg
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Patent number: 3981973Abstract: Metal salts which are crystallizable from a saturated aqueous solution of the salt in the presence of a dispersion of polytetrafluoroethylene (hereinafter referred to as PTFE) resin are grown as geometrically better defined and larger crystals than those grown from an unseeded saturated solution.Type: GrantFiled: December 17, 1973Date of Patent: September 21, 1976Assignee: The Harshaw Chemical CompanyInventor: John G. Richardson
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Patent number: 3981964Abstract: Chrome saltcake has stable free flowing properties imparted to it by subjecting the sodium dichromate impurity present in chrome saltcake to reaction to form a product that is less susceptible to absorption of moisture than sodium dichromate.Type: GrantFiled: December 3, 1974Date of Patent: September 21, 1976Assignee: British Chrome & Chemicals LimitedInventor: Danvers A. Swales