Utilizing Dissolved Or Liquid Reactant Patents (Class 423/280)
  • Patent number: 8357344
    Abstract: The gaseous effluent to be treated is contacted in column C1 with an absorbent solution selected for its property of forming two separable phases when it is heated. The regenerated absorbent solution is separated into two phases in drum B1; a fraction rich in water and a fraction rich in reactive compounds. Separation allows to optimize the operations performed on the regenerated absorbent solution. On the one hand, separation allows to carry out vaporization, through reboiler R1, of a fraction of the absorbent solution, preferably containing a limited reactive compound concentration in relation to the absorbent solution, thus limiting their degradation. On the other hand, separation of the phases allows to reduce the amount of solution to be treated in order to remove the non-regeneratable salts and thus to reduce the costs linked with their elimination. Finally, separation allows to eliminate the degradation products by carrying out a specific and suitable purification for each phase.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: January 22, 2013
    Assignee: IFP
    Inventors: Pierre-Antoine Bouillon, Marc Jacquin
  • Patent number: 8268280
    Abstract: The present invention relates to a method for production of calcium compounds having very low content of phosphorus and boron from an impure calcium chloride, solution containing phosphorus and boron, which method comprises the following steps: a) addition of a FeCl3-solution to the calcium chloride solution, b) adjusting the pH of the solution by addition of a base to between 3 and 9.5 for precipitation of iron hydroxide, iron phosphate and boron compounds, c) removal of the solid precipitate from the solution in step b) obtaining a purified calcium chloride solution, d) precipitation of a calcium compound from the solution from step c), and e) separation of the calcium compound from the solution in step d).
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: September 18, 2012
    Assignee: Elkem Solar AS
    Inventors: Torfinn Buseth, Einar Andersen
  • Publication number: 20110319251
    Abstract: The present invention relates to a process for the preparation of an isomorphously substituted RUB-36 silicate comprising (1) providing a mixture containing silica, preferably amorphous silica, and/or at least one silica precursor, water, at least one suitable structure directing agent, (2) heating the mixture obtained according to (1) under hydrothermal conditions to give a suspension containing an RUB-36 silicate, (3) separating the RUB-36 silicate, wherein (a) either the mixture according to (1) contains at least one element suitable for isomorphous substitution and/or (b) the separated RUB-36 silicate according to (3) is subjected to isomorphous substitution.
    Type: Application
    Filed: March 3, 2010
    Publication date: December 29, 2011
    Applicant: BASF SE
    Inventors: Bilge Yilmaz, Ulrich Müller, Feng-Shou Xiao, Hermann Gies, Xinhe Bao, Dirk De Vos, Takashi Tatsumi, Weiping Zhang
  • Patent number: 7306780
    Abstract: A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or ruthenium. The micro-disperse particles can have a substantially uniform diameter of 1-10 microns, and preferably about 3-5 microns. Ruthenium or cobalt catalytic nanoparticles can be incorporated in the micro-disperse particles of sodium borohydride, which allows a rapid and complete reaction to occur without the problems associated with caking and scaling of the surface by the reactant product sodium metaborate. A closed loop water management system can be used to recycle wastewater from a PEM fuel cell to supply water for reacting with the micro-disperse particles of sodium borohydride in a compact hydrogen gas generator. Capillary forces can wick water from a water reservoir into a packed bed of micro-disperse fuel particles, eliminating the need for using an active pump.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: December 11, 2007
    Assignee: Sandia Corporation
    Inventors: Stanley H. Kravitz, Andrew M. Hecht, Alan P. Sylwester, Nelson S. Bell
  • Patent number: 6608001
    Abstract: A method for producing small spherical particles that are especially useful as catalysts and catalyst supports employed in chemical processes is disclosed. According to some embodiments, the method includes impregnating a porous support with a metal or metal oxide and dissolving the support to release spherical particles. In certain embodiments the support that is employed in the method comprises a number of spherical voids which determine the size of the spherical particles, and preferably have micrometer range diameters. One embodiment of an attrition resistant Fischer-Tropsch catalyst comprises a plurality of micrometer size spherical metal and/or metal oxide particles that are prepared according to the above-described method.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: August 19, 2003
    Assignee: ConocoPhillips Company
    Inventor: Joe D. Allison
  • Publication number: 20010030032
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Application
    Filed: April 22, 2001
    Publication date: October 18, 2001
    Inventors: Bruce A. Keiser, James E. Whitten
  • Publication number: 20010023753
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Application
    Filed: April 22, 2001
    Publication date: September 27, 2001
    Inventors: Bruce A. Keiser, James E. Whitten
  • Publication number: 20010023752
    Abstract: The invention comprises a borosilicate retention aid composition and a method for improving the production of paper by addition of the borosilicate. The borosilicate may be utilized in conjunction with a high molecular weight synthetic flocculant and/or starch, with or without the addition of a cationic coagulant. The borosilicate material is preferably a colloidal borosilicate. Methods for the preparation of the borosilicate material are disclosed.
    Type: Application
    Filed: April 22, 2001
    Publication date: September 27, 2001
    Inventors: Bruce A. Keiser, James E. Whitten
  • Patent number: 6025454
    Abstract: Direct thermal syntheses in the absence of catalyst, of poly(borazylenes) and of oligomers of borazine with polyhedral boranes, carboranes or heteroboranes are disclosed. The products of these syntheses are precursors to BN or other boron-containing ceramics.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: February 15, 2000
    Assignee: The Trustees of the University of Pennsylvania
    Inventors: Larry G. Sneddon, Jeffrey Scott Beck, Paul Joseph Fazen
  • Patent number: 5869014
    Abstract: A process for the production of calcium borate from boric acid; boric acid, obtained from any source, is reacted with a calcium compound, preferably calcium hydroxide, in an aqueous medium to obtain a suspension of solid calcium borate which is then separated from the residual liquor. Preferably the boric acid is prepared from minerals containing borate salts, in particular, colemanite and howlite; wherein said minerals are ground, reacted with sulfuric acid in an aqueous medium, at high temperature, to obtain a pulp of solids, including mainly gypsum and clay, in a liquor; said solids are eliminated from the liquor and boric acid is crystallized.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: February 9, 1999
    Inventors: Manuel Camarena Carranza, Juan Manuel Cuevas Martinez, Luis Armando Blanco Huerta, Julio Enrique Wong Gaytan
  • Patent number: 5785939
    Abstract: An improved method is provided for producing crystalline calcium hexaborate tetrahydrate, synthetic nobleite, by the reaction of boric acid and lime in an aqueous slurry. Reaction conditions include boric acid to water molar ratios of greater than 0.25:1, lime to boric acid molar ratios in the range of 0.05-0.15:1 and temperatures in the range of 60.degree.-85.degree. C. A concentration of at least 25% by weight undissolved solids is in the aqueous product slurry.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: July 28, 1998
    Assignee: U.S. Borax Inc.
    Inventor: David M. Schubert
  • Patent number: 5688481
    Abstract: An improved method is provided for producing crystalline calcium hexaborate tetrahydrate, synthetic nobleite, by the reaction of boric acid and lime in an aqueous slurry. Reaction conditions include boric acid to water molar ratios of greater than 0.25:1, lime to boric acid molar ratios in the range of 0.05-0.15:1 and temperatures in the range of 85.degree.-105.degree. C. A novel crystalline product is produced having a unique crystal habit resulting in improved physical properties. Dehydration of this product produced a novel amorphous, anhydrous product having similar crystal habit and physical properties.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: November 18, 1997
    Assignee: U.S. Borax Inc.
    Inventor: David M. Schubert
  • Patent number: 5520837
    Abstract: A cleaning composition, method of manufacture and method of cleaning of for se in cleaning equipment including life support equipment employed in the generating, handling, storage and delivery of oxygen-enriched gases and liquids are provided in which the cleaning composition is inorganic, non-flammable, non-toxic, environmentally safe, non-corrosive, and ready to use and which includes an aqueous silicate solution together with fluoroborates and molybdates.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: May 28, 1996
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Neil E. Antin, Douglas P. Jackson
  • Patent number: 5472644
    Abstract: Zinc borate compositions having a ZnO:B.sub.2 O.sub.3 ratio of 4:1. The hydrated zinc borate 4ZnO.B.sub.2 O.sub.3.H.sub.2 O and anhydrous zinc borate 4ZnO.B.sub.2 O.sub.3 are especially useful as fire-retardants and smoke-suppressant additives for polymeric compositions.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: December 5, 1995
    Assignee: U.S. Borax Inc.
    Inventor: David M. Schubert
  • Patent number: 5472678
    Abstract: The present invention concerns a method for preparing earth alkaline metal borates.The method comprises the steps of forming a mixture of an earth-alkaline metal alkoxide and a boron alkoxide, of hydrolysing this mixture to form a metal-borate precursor, and then coating the precursor onto a substrate and thermally treating it to form an inorganic film on the substrate.The method is especially useful to prepare beta barium borate layers which can serve in non-linear optical devices to produce second harmonics generation.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: December 5, 1995
    Assignee: Eastman Kodak Company
    Inventors: Wenjiang Nie, Gustavo R. Paz-Pujalt, Christian Lurin
  • Patent number: 5462692
    Abstract: Stable, solid acetyl peroxyborate compounds which are active oxygen-containing compounds derived from acetic acid and boron-oxygen compounds. The compounds of the invention have a peracetic acid content which can be liberated instantly and directly in water with only minor formation of hydrogen peroxide The acetyl peroxyborates of the invention are useful in washing, bleaching and cleaning agent and disinfectant applications and as oxidizing agents in organic synthesis.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: October 31, 1995
    Assignee: Peroxid-Chemie GmbH
    Inventors: Richard Roesler, Siegfried Schelle, Michael Gnann, Werner Zeiss
  • Patent number: 5427709
    Abstract: A cleaning composition, method of manufacture and method of cleaning of for se in cleaning equipment including life support equipment employed in the generating, handling, storage and delivery of oxygen-enriched gases and liquids are provided in which the cleaning composition is inorganic, non-flammable, non-toxic, environmentally safe, non-corrosive, and ready to use and which includes an aqueous silicate solution together with fluoroborates and molybdates.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: June 27, 1995
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Neil E. Antin, Douglas P. Jackson
  • Patent number: 5342553
    Abstract: Zinc borate compositions having a ZnO:B.sub.2 O.sub.3 ratio of 4:1. The hydrated zinc borate 4ZnO.B.sub.2 O.sub.3.H.sub.2 O and anhydrous zinc borate 4ZnO.B.sub.2 O.sub.3 are especially useful as fire-retardants and smoke-suppressant additives for polymeric compositions.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: August 30, 1994
    Assignee: U. S. Borax Inc.
    Inventor: David M. Schubert
  • Patent number: 5306478
    Abstract: A process for preparing granular water soluble alkali metal borate compositions by agitating a finely divided feedstock comprising a water soluble alkali metal borate and optionally boric acid, the molar ratio of alkali metal oxide to boric oxide in the feedstock being from about 0.1 to 0.5:1, optionally heating the agitated feedstock particles, contacting the agitated feedstock particles with an aqueous granulating agent to agglomerate feedstock particles, and recovering a granular borate composition having an average particle size of at least 250 micro meters. The resultant granulated product has a higher bulk density and better water dissolution rate than the feedstock particles.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: April 26, 1994
    Assignee: U.S. Borax Inc.
    Inventors: Igan Hayati, Kenneth W. Taylor, John M. Simon
  • Patent number: 4942025
    Abstract: Process for the manufacture of granular monohydrated sodium perborate, endowed with abrasion resistance, starting from the corresponding tetrahydrated perborate, characterized in that a carboxylic acid, containing from 1 to 3 C atoms, or an alkali metal salt thereof, is added to the tetrahydrated perborate, already present in the granular state, whereafter a dehydration of the tetrahydrated perborate is carried out.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: July 17, 1990
    Assignee: Ausimont S.p.A.
    Inventors: Antonino Condo, Renzo Ferrario
  • Patent number: 4897249
    Abstract: A filtered solution of barium hydroxide octahydrate reacted with an aqueous solution of boric acid to provide hydrated .gamma. barium borate having a barium to boron ratio of 1:2 and having fine particle size. The hydrated .gamma. barium borate was converted to the anhydrous .gamma. form at about 300.degree. to 400.degree. C. Further heating to about 600.degree. to 800.degree. C. converted the product to .beta.-BaB.sub.2 O.sub.4. The conversion to the .beta.-form is preferably during sintering of a ceramic dielectric composition to which the .gamma.-BaB.sub.2 O.sub.4 has been added as a flux.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: January 30, 1990
    Assignee: Sprague Electric Company
    Inventors: Sidney D. Ross, Manuel Finkelstein
  • Patent number: 4894211
    Abstract: The invention relates to a process for the production of granular sodium perborate monohydrate having good mechanical strength. The process is characterized in that sodium silicate having an SiO.sub.2 /Na.sub.2 O molar ratio comprised within the range of from 0.4 to 2.0 is added to granular sodium perborate tetrahydrate while this is being kept in movement and the so processed perborate tetrahydrate is dried until perborate monohydrate is obtained.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: January 16, 1990
    Assignee: Ausimont S.p.A.
    Inventors: Antonino Condo', Renzo Ferrario
  • Patent number: 4863706
    Abstract: A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1.The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate.The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or actone.The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: September 5, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takeo Wada, Hiroshi Onaka, Hideaki Matsuda
  • Patent number: 4857286
    Abstract: High-purity sodium tetraborate pentahydrate (Na.sub.2 B.sub.4 O.sub.7.5H.sub.2 O) is produced by:(a) reacting the mineral colemanite (2CaO.3B.sub.2 O.sub.3.5H.sub.2 O) with sodium carbonate (Na.sub.2 CO.sub.3) in an aqueous environment to produce an aqueous solution of sodium tetraborate and sodium hydroxide, with precipitation of solid calcium carbonate;(b) treating the aqueous solution obtained in stage (a), after separating the precipitated calcium carbonate, with boric acid (H.sub.3 BO.sub.3) to neutralize the sodium hydroxide and form a further quantity of sodium tetraborate;(c) separating sodium tetraborate pentahydrate by crystallization from the aqueous solution obtained in stage b.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: August 15, 1989
    Assignee: Societa Chimica Larderello S.p.A.
    Inventor: Paolo Mazzinghi
  • Patent number: 4816239
    Abstract: A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M other than boron, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1.The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate.The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or acetone.The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.
    Type: Grant
    Filed: November 10, 1987
    Date of Patent: March 28, 1989
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takeo Wada, Hiroshi Onaka, Hideaki Matsuda
  • Patent number: 4801404
    Abstract: A novel suspension of boric acid comprising a concentrated, finely dispersed suspension of boric acid and a small amount of a soluble borate salt in an aqueous medium and a method of preparing the same.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: January 31, 1989
    Assignee: Rutgerswerke AG
    Inventors: Wolf Dietrich, Volker Beez, Eberhard Giebeler
  • Patent number: 4767738
    Abstract: The present invention is a novel crystalline lead aluminum borate composition characterized by a unique x-ray diffraction pattern.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: August 30, 1988
    Assignee: Amoco Corporation
    Inventors: John L. Melquist, Melvin L. Luetkens, Jr.
  • Patent number: 4756894
    Abstract: Improved process for obtaining boric acid from colemanite and/or howlite minerals basically comprising the stages of: treating the mineral with sulfuric acid to dissolve boron compounds; separating a solution thus formed from the solids in suspension; reacting said solution with hydrogen sulfide to precipitate arsenic and iron impurities precipitated from the remaining solution; cooling the remaining solution to precipitate boric acid; and separating the boric acid from the formed suspension. The liquor produced is free from impurities and before cooling can be recycled to the stage where the mineral is treated with sulfuric acid in order to concentrate the mineral. Likewise, the liquor obtained after precipitation of boric acid can also be recycled to said stage in order to concentrate the solution.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: July 12, 1988
    Assignee: Materias Primas Magdalena S.A.DE C.V.
    Inventor: Jose Polendo-Loredo
  • Patent number: 4756745
    Abstract: An improved process to benefit colemanite and/or howlite minerals comprising the stages of: treating mineral with sulfuric acid in order to dissolve boron compounds; separating the solution formed from the solids in suspension; reacting said solution with hydrogen sulfide in order to precipitate the arsenic and iron impurities contained in the solution, and separating the impurities precipitated from the remaining solution as a beneficiated colemanite with boron. Said solution of the beneficiated colemanite with boron can be dried by spray fluidizing in order to obtain solid beneficiated colemanite with boron or said solution can be reacted with calcium hydroxide to precipitate a beneficiated colemanite with calcium borate which is separated from the remaining solution. This can be recycled for treatment with sulfuric acid to concentrate the mineral.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: July 12, 1988
    Assignee: Materias Primas Magdalena, S.A.DE C. V.
    Inventor: Jose Polendo-Loredo
  • Patent number: 4731234
    Abstract: A process for producing acidic boratozirconium chloride sols which comprises: reacting a zirconium compound with a boron compound in molar ratios of B/Zr of 0.3-1.2 together with a compound of a metal M other than boron, the metal M being selected from the group consisting of divalent, trivalent, tetravalent and pentavalent metals in molar ratios of M/Zr of about 0.01-1 in water in the presence of chloride ions in molar ratios of Cl/Zr of not less than about 1.The acidic boratozirconium chloride sol may be converted to basic boratozirconium sols by reacting the acidic sol with a basic carbonate compound such as ammonium carbonate.The sols, either acidic or basic, are readily gelled by contact with a dehydration solvent such as methanol or acetone.The gel is calcined at relatively low temperatures to provide zirconia which is either very pure or stabilized in varied degrees.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: March 15, 1988
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Takeo Wada, Hiroshi Onaka, Hideaki Matsuda
  • Patent number: 4683126
    Abstract: A method for producing an alkaline earth metal borate dispersion, comprising two steps of:(I) reacting at 20.degree.-100.degree. C. a mixture of the following ingredients (A) to (E)(A) 100 parts by weight of the oil-soluble neutral sulfonate of an alkaline earth metal,(B) 10-100 parts by weight of the hydroxide or oxide of an alkaline earth metal,(C) boric acid in an amount which is 0.5-6.5 times in mol that of the ingredient (B),(D) 5-50 parts by weight of water, and(E) 50-200 parts by weight of a dilution solvent and then(II) heating the reslting reaction mixture to 100.degree.-200.degree. C. to remove the water and a part of the dilution solvent as required.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: July 28, 1987
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Kiyoshi Inoue, Yoshiharu Nose
  • Patent number: 4661157
    Abstract: Boron compounds such as alkali metal or alkaline earth metal borates capable of forming hydrates or higher hydrates may be formed into shaped bodies by forming into a paste with water and allowing the water to be bound to form a solid shaped body. The bodies are useful as inserts into preformed cavities in structures, e.g. of wood, liable to insect, fungal or other infestation by virtue of the slow dissolution of the insert and the toxicity to such organisms of the boron compounds.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: April 28, 1987
    Assignee: Laporte Industries Limited
    Inventors: William Beauford, Nicholas J. Spragg, Malcolm Millar
  • Patent number: 4325922
    Abstract: High-temperature stack gases contaminated with condensable boron oxides or boric acids are processed to ecologically-acceptable effluent gases by the steps of:(a) cooling the stack gases to a temperature above about 250.degree. F. and converting condensable boron oxides and boric acids to non-volatile boron compounds by spraying the stack gases with an aqueous solution of a strong base;(b) collecting and removing the thus-formed non-volatile boron compounds from the cooled gases and(c) venting the resulting ecologically-acceptable effluent gases to the atmosphere.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: April 20, 1982
    Assignee: United McGill Corporation
    Inventor: Mark A. Bryant
  • Patent number: 4270944
    Abstract: A process where calcium borates are precipitated from an aqueous solution of ulexite is disclosed. The ulexite is dissolved in hydrochloric acid. Calcium chloride then is added to the acid solution and then neutralized to precipitate the calcium borates. The calcium borates so produced are useful as glass forming, batch ingredients that can be compacted into agglomerates and preheated.
    Type: Grant
    Filed: January 11, 1980
    Date of Patent: June 2, 1981
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Walter L. Eastes, Anna Tarantino
  • Patent number: 4256479
    Abstract: A process for granulating crystalline fertilizer borate to produce a product with exceptionally satisfactory physical and chemical properties in regard to bulk blending with other fertilizer blend materials and also in regard to storage and handling properties. The process involves specialized procedures in processing the solid feedstock and granulating the solids with use of a small amount of acid solution. Product drying is not required.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: March 17, 1981
    Assignee: Tennessee Valley Authority
    Inventor: Cecil P. Harrison
  • Patent number: 4233051
    Abstract: A method of precipitating calcium borates from an aqueous mixture of calcium chloride and borax is disclosed. The yield of calcium borate precipitates can be increased by increasing the concentration of borax. Preferably, an increase in the calcium concentration also is employed. In general, it was found that properties of compacted glass batch produced from these calcium borates compare favorably with those compacted from standard glass batches.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: November 11, 1980
    Assignee: Owens-Corning Fiberglas Corporation
    Inventor: Walter L. Eastes
  • Patent number: 4196177
    Abstract: High purity ammonium pentaborate or boric acid is produced from alkali metal and alkaline earth metal borate ores by a relatively non-corrosive technology requiring low energy, without polluting the environment, by treating finely ground borate ores with ammonia and sulphur dioxide or ammonium sulphite in the presence of methanol. Useful by-products, such as sulphites, or fertilizers, such as ammonium phosphates, can be obtained. If the ore is rendered anhydrous prior to treatment, there is produced methylborate-ammonia adduct which upon hydrolysis is transformed into ammonium pentaborate and boric acid.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: April 1, 1980
    Inventor: Stephen I. Sallay
  • Patent number: 4086325
    Abstract: The process of drying concentrates containing boric acid and/or borates after addition of lime is improved by the addition of an oxidizing agent to the concentrate.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: April 25, 1978
    Assignee: Belgonucleaire, S.A.
    Inventors: Jean-Pierre Cordier, Marc Vandorpe