| Patent Number |
Title Of Patent |
Date Issued |
| RE32827 |
Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors |
January 10, 1989 |
| New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thionocarbamate compound selected from compounds of t |
| RE32786 |
Neutral hydrocarboxycarbonyl thiourea sulfide collectors |
November 22, 1988 |
| New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thiourea compound selected from compounds of the form |
| 5959054 |
Polymeric sulfide mineral depressants |
September 28, 1999 |
| Novel depressants for depressing sulfide minerals during froth floatation of ores to recover value minerals are disclosed, as well as a method for their use in the froth flotation. The novel depressants are terpolymers of a (meth)acrylamide, an allyl thiourea and a hydroxyalkyl(meth)acry |
| 5837211 |
Compositions and method for foam control in Bayer process |
November 17, 1998 |
| Methods of reducing foam in Bayer process liquor are provided, said methods comprising adding a composition to the Bayer process liquor that comprises a tri(alkoxy alkyl) phosphate and a hydroxyl group containing carrier. |
| 5756622 |
Polymeric sulfide mineral depressants |
May 26, 1998 |
| Novel depressants for depressing sulfide minerals during froth floatation of ores to recover value minerals are disclosed, as well as a method for their use in the froth flotation. The novel depressants are terpolymers of a (meth)acrylamide, an allyl thiourea and a hydroxyalkyl (meth)acr |
| 5533626 |
Method of depressing non-sulfide silicate gangue minerals |
July 9, 1996 |
| A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a polymeric mixture of a polysaccharide and a material comprising recurring units of the formula: ##STR1## wherein X is the polymerization residue of an acrylamide or mixture of |
| 5531330 |
Method of depressing non-sulfide silicate gangue minerals |
July 2, 1996 |
| A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a polymeric material comprising recurring units of the formula: ##STR1## wherein X is the polymerization residue of an acrylamide or mixture of acrylamides, Y is an hydroxy |
| 5525212 |
Method of depressing non-sulfide silicate gangue minerals |
June 11, 1996 |
| A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a mixture of a polysaccharide and a graft polymer of polyvinyl alcohol and an acrylamide. |
| 5507395 |
Method of depressing non-sulfide silicate gangue minerals |
April 16, 1996 |
| A method for the depression of non-sulfide, silicate gangue minerals is provided wherein the depressant is a graft polymer of polyvinyl alcohol and an acrylamide. |
| 5261539 |
Flotation process for purifying calcite |
November 16, 1993 |
| Alkoxylated alkyl amines and alkoxylated alkyl guanidines are excellent collectors when used in mineral froth flotation to remove quartz, micaceous minerals, chlorite, pyrite and other mineral impurities from finely ground calcium carbonate to control tint, color, and abrasiveness. |
| 5237079 |
Collectors and processes for making and using same |
August 17, 1993 |
| A method for the production of alkyl or alkaryl hydroxamic acids and/or salts wherein a C.sub.8 -C.sub.22 alcohol is employed with water as the solvent is disclosed as well as the resultant salt and/or acid solutions per se and their use in the flotation of non-sulfide minerals, preferab |
| 5194673 |
Process of alkoxy and aryloxy isothiocyanate preparation |
March 16, 1993 |
| Alkoxy and aryloxy isothiocyanates are produced by the reaction of a haloformate and an alkali or alkaline earth metal thiocyanate in the presence of water and (i) a catalyst comprising a six membered mononuclear or ten membered fused polynuclear aromatic, heterocyclic compound having 1 |
| 5019246 |
Frothing procedure using polymeric sulfide mineral depressants |
May 28, 1991 |
| Various acrylic acid allyl/thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed. |
| 4966938 |
Allyl thiourea polymer with surface-modifying agent |
October 30, 1990 |
| Various acrylic acid allyl/thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed. |
| 4929343 |
Novel collectors and processes for making and using same |
May 29, 1990 |
| A method for the production of alkyl or alkaryl hydroxamic acids and/or salts wherein a C.sub.8 -C.sub.22 alcohol is employed with water as the solvent is disclosed as well as the resultant salt and/or acid solutions per se and their use in the flotation of non-sulfide minerals, preferab |
| 4902765 |
Allyl thiourea polymers |
February 20, 1990 |
| Various acrylic acid allyl/thiourea polymers and their use as depressants in the beneficiation of sulfide minerals from ores are disclosed. |
| 4902764 |
Polymeric sulfide mineral depressants |
February 20, 1990 |
| A novel polymer composition comprising recurring units of the formula: ##STR1## wherein each R.sup.1 is, individually, hydrogen or C.sub.1 -C.sub.4 alkyl; each R.sup.5, individually, is hydrogen or a C.sub.1 -C.sub.4 lower alkyl group; X is OH or SH; Y is OR.sup.2, SR.sup.2, NR.sub.2 |
| 4871466 |
Novel collectors and processes for making and using same |
October 3, 1989 |
| A method for the production of alkyl or alkaryl hydroxamic acids and/or salts wherein a C.sub.8 -C.sub.22 alcohol is employed with water as the solvent is disclosed as well as the resultant salt and/or acid solutions per se and their use in the flotation of non-sulfide minerals, preferab |
| 4778921 |
Novel process of alkoxy and aryloxy isothiocyanate preparation |
October 18, 1988 |
| Alkoxy and aryloxy isothiocyanates are produced by the reaction of a haloformate and an alkali or alkaline earth metal thiocyanate in the presence of water and a catalyst comprising a six membered mononuclear or ten membered fused polynuclear aromatic, heterocyclic compound having 1 or |
| 4744893 |
Polymeric sulfide mineral depressants |
May 17, 1988 |
| A process for the froth flotation separation of value sulfide minerals from gangue iron sulfide minerals in which a novel terpolymer of copolymer of acylamide, acrylic acid and/or derivatives of acrylamide and acrylic acid is employed as a depressant for the gangue iron sulfide minerals. |
| 4661278 |
Monothiophosphinates as acid, neutral, or mildly alkaline circuit sulfide collectors and process |
April 28, 1987 |
| A process for the beneficiation of base metal sulfide mineral values from base metal sulfide ores with selective rejection of gangue sulfide minerals at pH values below about 10.0 by froth flotation is disclosed. The process includes the use of a new and improved collector which at pH |
| 4657688 |
Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors |
April 14, 1987 |
| New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thionocarbamate compound selected from compounds of t |
| 4587013 |
Monothiophosphinates as acid, neutral, or mildly alkaline circuit sulfide collectors and process |
May 6, 1986 |
| A process for the beneficiation of base metal sulfide mineral values from base metal sulfide ores with selective rejection of gangue sulfide minerals at pH values below about 10.0 by froth flotation is disclosed. The process includes the use of a new and improved collector which at pH |
| 4584097 |
Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors |
April 22, 1986 |
| New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thionocarbamate compound selected from compounds of t |
| 4556483 |
Neutral hydrocarboxycarbonyl thiourea sulfide collectors |
December 3, 1985 |
| New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thiourea compound selected from compounds of the form |
| 4532031 |
Froth flotation process |
July 30, 1985 |
| A process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. Frothers prepared by Michael addition between alpha, beta-unsaturated ethylenic compounds and either alcohols, amines or mercaptans or by the condensation of HCN, aldehydes |
| 4394257 |
Froth flotation process |
July 19, 1983 |
| A process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. Frothers prepared by Michael addition between alpha, beta-unsaturated ethylenic compounds and either alcohols, amines or mercaptans or by the condensation of HCN, aldehydes |
| 4362559 |
Method of introducing addition agents into a metallurgical operation |
December 7, 1982 |
| Addition agents are blended with a modified tall oil pitch binder and briquetted, extruded, molded, pelletized, or tabletized into a unitary composition. This compacted composition is then fed into a metallurgical operation, such as steel-making, at an appropriate stage in the operation |
| 4360615 |
Addition agent composition |
November 23, 1982 |
| Modified tall oil pitch is blended with a metallurgical addition agent and briquetted, extruded, molded, pelletized, or tabletized into a unitary composition. The tall oil pitch is modified chemically to increase the molecular weight and improve the binding properties. |
| 4340467 |
Flotation of coal with latex emulsions of hydrocarbon animal or vegetable based oil |
July 20, 1982 |
| Employment of a latex emulsion prepared from a hydrocarbon, animal or vegetable based oil with a hydrophobic water-in-oil emulsifier and a hydrophilic surfactant in the froth flotation of coal improves coal recovery without increasing the ash content. The emulsifier employed should h |
| 4233150 |
Process for beneficiation of non-sulfide iron-free ores |
November 11, 1980 |
| Improved beneficiation of non-sulfide iron free ores by froth flotation results when the collector employed is a mixture of a naturally derived fatty acid and a partial ester of a polycarboxylic acid having at least one free carboxylic acid group. |
| 4231868 |
Process for dewatering mineral and coal concentrates |
November 4, 1980 |
| Mineral and coal concentrates are effectively dewatered by a process wherein there is employed a dewatering aid comprising of an N-substituted sulfosuccinamate. The process provides for mixing the dewatering aid to an aqueous slurry of the concentrate and thereafter subjecting the treate |
| 4210531 |
Process for dewatering mineral concentrates |
July 1, 1980 |
| Treatment of a slurry of a mineral concentrate with a flocculant followed by a combination of an anionic surfactant and a water-insoluble organic liquid provides reduced moisture content upon dewatering the thus-treated slurry. |
| 4208487 |
Novel frother composition for beneficiation of mineral ores |
June 17, 1980 |
| A combination of conventional frothing agent and a particular amino-aldehyde resin provides better recovery of mineral values than can be obtained with either agent alone. |
| 4207186 |
Process for dewatering mineral concentrates |
June 10, 1980 |
| Mineral concentrates are dewatered by filtration employing as a dewatering aid the mixture of a hydrophobic alcohol and a nonionic surfactant for significantly lower residual water contents. |
| 4207178 |
Process for beneficiation of phosphate and iron ores |
June 10, 1980 |
| Froth flotation of phosphate and iron ores is improved in recovery when a collector combination of a fatty acid and an alkylamidoalkyl monoester of a sulfosuccinic acid or a salt thereof is employed. |
| 4206063 |
Dewatering aid composition |
June 3, 1980 |
| The mixture of a hydrophobic alcohol and a nonionic surfactant is an effective dewatering aid for mineral concentrates, significantly lowering the moisture content. |
| 4206045 |
Process for froth flotation of phosphate using combination collector |
June 3, 1980 |
| Phosphate values are selectively froth floated from an aqueous ore pulp by use of a combination collector comprising a fatty acid and an N-alkyl substituted 3-sulfonic propionamide. |
| 4199065 |
Process for recovery of fine coal |
April 22, 1980 |
| Fine coal is recovered with reduced ash content when a bis(alkyl)ester of a sulfosuccinic acid salt is employed as conditioning agent in froth flotation thereof. |
| 4196092 |
Conditioning agent for froth flotation of fine coal |
April 1, 1980 |
| A conditioning agent comprising a frother and a bis(alkyl)ester of a sulfosuccinic acid salt provides high coal recovery with reduced ash content. |
| 4192739 |
Process for beneficiation of non-sulfide ores |
March 11, 1980 |
| Froth flotation of non-sulfide ores is improved in recovery when a collector combination of a fatty acid and a monoester of a sulfosuccinic acid or salt thereof is employed. |
| 4186083 |
Process for froth flotation of non-sulfide minerals |
January 29, 1980 |
| An improved process of froth flotation for non-sulfide minerals arises when the collector employed is a combination of a fatty acid and an anionic perfluorosulfonate compound. |
| 4158623 |
Process for froth flotation of phosphate ores |
June 19, 1979 |
| Conditioning of an aqueous slurry of a phosphate ore with a combination of a fatty acid and a dialkylsulfosuccinic acid or salt thereof provides improved beneficiation upon froth flotation of the conditioned ore. |
| 4153549 |
Sodium dialkyl sulfosuccinates as dewatering aids in the filtration of mineral concentrates |
May 8, 1979 |
| The use of a dialkylsulfosuccinic acid or salt thereof as a dewatering aid in the filtration of mineral concentrates provides reduced moisture content and substantial retention of the dewatering aid on the dewatered mineral concentrate when the alkyl groups of the dewatering aid contain |
| 4148720 |
Process for beneficiation of non-sulfide iron ores |
April 10, 1979 |
| Improved beneficiation of non-sulfide iron ores by froth flotation results when the collector employed is a mixture of a naturally derived fatty acid and a partial ester of a polycarboxylic acid having at least one free carboxylic acid group. |
| 4147644 |
Collector combination for non-sulfide ores |
April 3, 1979 |
| Combinations of fatty acids and anionic perfluoroalkyl compounds are superior collectors in the froth flotation of non-sulfide minerals. |
| 4139481 |
Combinations of alkylamidoalkyl monoesters of sulfosuccinic acid and fatty acids as collectors f |
February 13, 1979 |
| A combination of a fatty acid and an alkylamidoalkyl monoester of a sulfosuccinic acid or salt thereof provides improved recovery of non-sulfide ores by froth flotation. |
| 4138350 |
Collector combination for non-sulfide ores comprising a fatty acid and a sulfosuccinic acid mono |
February 6, 1979 |
| A combination of fatty acid and a monoester of sulfosuccinic acid or salt thereof provides improved recovery of non-sulfide ores by froth flotation. |
| 4128475 |
Process for beneficiation of mineral values |
December 5, 1978 |
| Improved recovery of mineral values is obtained in froth flotation thereof when the frothing composition employed is a combination of a conventional frothing agent and an amino-aldehyde resin. |
| 4021505 |
Mar-resistant coating composition of reaction product of hydroxy-terminated urethane and melamin |
May 3, 1977 |
| Compositions of matter consisting of urethane prepolymers having terminal hydroxy groups and produced from a diol of a molecular weight of 200-3,000, an organic diisocyanate and a polyhydric alcohol having 2-6 hydroxyl groups which are admixed with alkylated melamine/formaldehyde mat |
