| Patents for C01G 37 - Compounds of chromium (1,613) |
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| 07/07/1992 | US5128284 Preparation of lanthanum chromite powders by sol-gel |
| 07/07/1992 | US5127999 Process for the preparation of alkali metal dichromates and chromic acid by electrolysis |
| 06/16/1992 | US5122357 Crystalline microporous metal oxysulfide compositions |
| 06/16/1992 | US5122238 Efficient electrolytic method of making chromic acid from sodium bichromate |
| 05/20/1992 | EP0486236A1 Zinc sulfide optical elements |
| 05/12/1992 | US5112583 Process for recovering chromic anhydride from exhausted aqueous chromium plating bath solutions with exploitation of the recovered chromium |
| 03/25/1992 | EP0342218B1 Metallic oxide powders, their mixtures, systems of mixed metallic oxide powders, their mixtures and their use for catalytic dehydration of hydrocarbons |
| 03/17/1992 | US5096779 Chromium dioxide material, its preparation and magnetic recording media containing this chromium dioxide material |
| 03/17/1992 | US5096548 dissolving ferrochrome in sulfuric acid, crystallization, filtration, precipitation of chromium hydroxide, electrolysis |
| 03/10/1992 | US5094729 Processes for the preparation of alkali metal dichromates and chromic acid |
| 03/10/1992 | CA1297131C Process for the isolation of p-hydroxybenzaldehyde |
| 02/18/1992 | CA1295807C Coprecipitation method for the manufacture of zinc oxyde based doped powders |
| 01/08/1992 | CN1057683A Transparent polycrystalline garnets |
| 01/02/1992 | EP0463369A1 Transparent polycrystalline garnets |
| 12/30/1991 | CA2042263A1 Transparent polycrystalline garnets |
| 12/27/1991 | EP0335934B1 Process for producing pulverulent mixed phases with a catalytic action |
| 12/25/1991 | CN1057244A Process and plant for prepn. of alkaline chromates from chromium minerals |
| 12/24/1991 | US5075089 Calcining, forming intercalation compound with chromate, molybdates, vavadates, tungstates, or silicates |
| 12/10/1991 | US5071522 Process for the preparation of chromic acid |
| 12/04/1991 | CN1056667A Plumbous chromate and lead sulfate produced by waste oxalic acid dregs |
| 11/14/1991 | WO1991017118A1 A process and plant for the preparation of alkaline chromates from chromium minerals |
| 11/14/1991 | WO1991017117A1 Process for regulating the flow rate in the electrochemical regeneration of chromic-sulphuric acid |
| 11/12/1991 | US5064549 Preparation of stabilized chromium dioxide with sodium tetracarbonylferrate |
| 11/07/1991 | DE4014429A1 Verfahren zur regelung des durchsatzes bei der elektrochemischen regeneration von chromschwefelsaeure A method for regulating the flow rate in the electrochemical regeneration of chromschwefelsaeure |
| 10/31/1991 | WO1991016276A1 Sinter reactive lanthanum chromite and process for making it |
| 10/30/1991 | EP0453913A2 Process for the preparation of sodium dichromate |
| 10/29/1991 | US5061673 Compositions involving Cr2 --O3 --V2 O3 --TiO2 |
| 10/29/1991 | US5061402 Reacting lanthanum, chromium and group 2A compounds with ammonium hydroxide to precipitate as hydroxide gel, sintering to form ceramic powder |
| 10/27/1991 | CA2041005A1 Process for the production of sodium dichromate |
| 10/09/1991 | EP0451001A1 Strontium and lanthanide mixed oxides and laser using single crystals of these oxides |
| 10/09/1991 | EP0450307A1 Hydrous trivalent chromium oxide/carbon particles |
| 10/01/1991 | US5053580 From mixtures of vaporized chromyl chloride, titanium tetrachloride, and vanadyl chloride by laser pyrolysis |
| 10/01/1991 | CA1289873C Coated chromium dioxide particles |
| 09/25/1991 | EP0447717A1 Method of making highly sinterable lanthanum chromite powder |
| 09/24/1991 | US5051155 Electrolytic formation of of alkali metal chromates and chromic acid |
| 09/10/1991 | US5047388 Superconductor and method for its production |
| 09/03/1991 | US5045162 Process for electrochemically regenerating chromosulfuric acid |
| 08/22/1991 | DE4005211A1 Stabilising coercive finely divided chromium di:oxide - by tempering, using gas stream moistened with water, suspending in water and treating with reductant |
| 08/06/1991 | US5037620 Preparation of anhydrous sodium dichromate flakes |
| 07/23/1991 | US5034211 Reducing turbidity in chromic acid solutions |
| 07/16/1991 | US5032377 Ring-shaped particles, dustless, free flowing |
| 07/10/1991 | EP0436146A1 Process for the electrochemical regeneration of chromosulphuric acid |
| 06/26/1991 | EP0433838A2 Process for the preparation of stabilized chromium dioxide and magnetic recording medium containing this material |
| 06/26/1991 | EP0433750A1 Process for the preparation of chromic acid |
| 06/26/1991 | EP0433748A1 Process for the preparation of chromic acid |
| 06/17/1991 | CA2032369A1 Process for the preparation of chromic acid |
| 06/17/1991 | CA2032368A1 Process for the preparation of chromic acid |
| 06/12/1991 | CN1052102A Process for direct extraction of chrome yellow from treatment of cr 6+ waste liquid |
| 06/11/1991 | CA1284844C Brine treatment using ethylene/carboxylic acid polymers |
| 05/30/1991 | WO1991005881A3 A method for removing chromium from chromium containing waste material |
| 05/07/1991 | US5013706 Chromium oxide, titanium oxide, vanadium oxide, selectivity to mono-olefins |
| 05/07/1991 | CA1283984C Removal of metals from solutions |
| 05/02/1991 | WO1991005881A2 A method for removing chromium from chromium containing waste material |
| 04/23/1991 | US5009877 Stabilization of acicular ferromagnetic chromium dioxide |
| 04/17/1991 | CN1050709A Process for recovery of chromium from waste solution for electroplating chromium |
| 04/16/1991 | US5007960 Drying, sizing, mixing with alkali, heating in the presence of oxygen, extracting water soluble chromate, evaporating |
| 03/13/1991 | EP0416078A1 Composite element comprising a polyether or copolyether, process for its preparation and its use for the extraction and separation of metallic cations |
| 02/12/1991 | US4992207 Composition for extraction of metal ions and oxanions |
| 01/09/1991 | EP0406234A1 Process for recovering chromic anhydride from exhausted aqueous chromium plating bath solutions with exploitation of the recovered chromium. |
| 01/01/1991 | US4981573 Process for the production of alkali dichromates and chromic acid employing an anode of valve metal activated by electrodepositing noble metals from melts |
| 12/13/1990 | WO1990015026A1 Process for reduction of hexavalent chromium |
| 12/13/1990 | WO1990011390A3 Composite element comprising a polyether or copolyether, process for its preparation and its use for the extraction and separation of metallic cations |
| 12/11/1990 | US4976948 Agglomerating aqueous slurry with chromium acetate binder, sintering, flame spraying |
| 12/05/1990 | CN1010677B Method for extracting chromic oxide and its apparatus |
| 11/28/1990 | EP0399035A1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials. |
| 11/06/1990 | US4968503 Using sodium bisulfate formed as waste in production of chromic oxide |
| 10/30/1990 | US4966760 Method for recovering chromium from chromium-bearing material |
| 10/24/1990 | CN1046314A Treatment and comprehensive utilization of waste liquor of sodium hydrogen sulfate containing chromium |
| 10/10/1990 | EP0391192A2 Electrolytic process for manufacturing alkali dichromates and chromic acid |
| 10/06/1990 | CA2013782A1 Process for the preparation of alkali metal dichromates and chromic acids by electrolysis |
| 09/18/1990 | WO1990011390A2 Composite element comprising a polyether or copolyether, process for its preparation and its use for the extraction and separation of metallic cations |
| 09/18/1990 | US4957562 Chrome oxide green, a process for its preparation and its use |
| 09/18/1990 | CA2030547A1 Composite element incorporating a polyether or copolyether, its preparation process and its use for extracting and separating metal cations |
| 09/11/1990 | US4956154 Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions |
| 08/07/1990 | US4946820 Preparation and use of tin (IV) oxide dispersion |
| 07/11/1990 | CN1043686A Process for preparing chrome yellow with galena and chromite |
| 06/28/1990 | WO1990006820A1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials |
| 06/06/1990 | EP0371152A1 Metal oxide powders, their mixtures, mixed metal oxide powders, their mixtures and use thereof for the catalytic dehydrogenation of hydrocarbons |
| 05/22/1990 | CA1269234A1 Preparation of ferromagnetic chromium dioxide |
| 05/16/1990 | EP0368380A1 Process for the purification of an aqueous alcaline or ammonium metallate solution including their isopolyanions of the metals chromium, molybden or tungsten |
| 05/16/1990 | EP0368066A1 Process for the preparation of sodium dichromate |
| 05/16/1990 | CN1008005B Colour hollow spherical corpuscle magnetic powder for magnetic flaw detecting and mfv. thereof |
| 03/28/1990 | EP0359827A1 Superconducting oxide and method of producing the same |
| 03/27/1990 | US4912270 Reacting a halogenated hydrocarbon with hydrogen fluoride |
| 03/21/1990 | CN1007240B Preparation of ferromagnetic chromium dioxide |
| 03/07/1990 | EP0356807A2 Process for the production of alkali dichromates and chromic acid |
| 03/07/1990 | EP0356806A2 Process for the production of chromic acid |
| 03/07/1990 | EP0356805A2 Process for the production of alkali dichromates and chromic acid |
| 03/07/1990 | EP0356804A2 Process for the production of alkali dichromates and chromic acid |
| 03/07/1990 | EP0356803A2 Process for the preparation of an electrolyte for obtaining alkali metal bichromates and chromic acid |
| 02/28/1990 | EP0355755A2 Chromium dioxide material, process for its preparation and magnetic recording material containing this chromium dioxide material |
| 02/06/1990 | CA1265535A1 Removal of impurities from amines |
| 01/16/1990 | US4894185 Buffers to cause precipitation |
| 12/26/1989 | US4889665 Process for producing ultrafine particles of ceramics |
| 12/13/1989 | EP0345576A1 Green chromium oxide, process for its preparation and its use |
| 11/29/1989 | CN1037495A Process for producing na dichromate |
| 11/23/1989 | EP0342218A1 Metallic oxide powders, their mixtures, systems of mixed metallic oxide powders, their mixtures and their use for catalytic dehydration of hydrocarbons |
| 11/21/1989 | US4882183 Coating with supersaturated liquid, fluorine additive |
| 11/08/1989 | EP0340585A2 Process for the preparation of sodium bichromate |
| 10/11/1989 | EP0335934A1 Process for producing pulverulent mixed phases with a catalytic action |