| Patents for C01G 37 - Compounds of chromium (1,613) |
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| 02/15/1995 | EP0638515A2 Process for upgrading of diluted acid |
| 02/13/1995 | CA2130212A1 Process for working up thin acid |
| 02/08/1995 | CN1027597C Method for comprehensive utilization of chrome slag by back-melting |
| 01/24/1995 | US5384017 Method of producing metal hydroxides |
| 01/24/1995 | CA2100948C Process for chromium removal using an inorganic sulfur compound |
| 01/10/1995 | US5380441 Removal of chromium from solution using mechanically agitated iron particles |
| 01/03/1995 | US5378383 Process for preparing modified chromium dioxide |
| 12/22/1994 | WO1994029220A1 Refractory oxides |
| 12/20/1994 | US5374408 Process for the preparation of alkaline chromates from chromium minerals |
| 11/23/1994 | CN1026681C Plumbous chromate and lead sulfate produced by waste oxalic acid dregs |
| 11/02/1994 | EP0621905A1 Process for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 10/26/1994 | EP0621234A1 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 09/29/1994 | WO1994021376A1 Synthesis of higher alcohols |
| 09/20/1994 | US5348725 Method of making pillared hydrotalcites and associated products |
| 09/07/1994 | EP0568640B1 Beneficiated lanthanum chromite for low temperature firing |
| 08/30/1994 | US5342589 Heating |
| 08/24/1994 | EP0527794B1 Process for regulating the flow rate in the electrochemical regeneration of chromic-sulphuric acid |
| 08/24/1994 | CN1091057A Catalyst production |
| 08/16/1994 | US5338334 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 08/09/1994 | US5336475 Adjustment of temperature and pH |
| 08/02/1994 | CA1331174C Mixed metal oxide powders, mixtures of these, metal oxide powders, and their use in the catalytic dehydration of hydrocarbons |
| 07/06/1994 | CN1025321C Process for preparing ultra-fine lead chromate |
| 06/28/1994 | US5324353 Zinc sulfide bodies having improved optical transmittance characteristics and mechanical characteristics |
| 06/09/1994 | WO1994012447A1 Fluxed lanthanum chromite for low temperature air firing |
| 06/09/1994 | WO1994012446A1 Air-sinterable lanthanum chromite and process for its preparation |
| 06/07/1994 | US5318937 Ruthenium-containing perovskite materials, catalysts and methods |
| 05/31/1994 | US5316684 Process for reduction of hexavalent chromium |
| 05/25/1994 | CN1087064A Process and apparatus for extracting chromium trioxide from leftover of chromium tanned leather |
| 05/25/1994 | CN1024684C Detoxication method of Cr slag leaching smelting |
| 05/11/1994 | CN1086494A Process for chromium trioxide by reduction of aminium sulfate |
| 05/10/1994 | US5310607 Hard coating; a workpiece coated by such hard coating and a method of coating such workpiece by such hard coating |
| 04/28/1994 | CA2109023A1 Low-residue high-extraction production of sodium dichromate |
| 03/31/1994 | WO1994006558A1 Catalyst production for use in a process for fluorination of hydrocarbons |
| 03/31/1994 | CA2141184A1 Catalyst production for use in a process for fluorination of hydrocarbons |
| 03/29/1994 | US5298469 Fluxed lanthanum chromite for low temperature air firing |
| 03/23/1994 | EP0588691A1 Ceric oxide containing composition, its preparation and its use |
| 03/09/1994 | CN1083535A Frame loading total-immersion dynamic countercurrent leaching process |
| 02/15/1994 | US5286686 Coprecipitation of lanthanum and chromium hydroxides; adding copper or zinc salt; desolventizing; calcining |
| 01/18/1994 | US5279804 Vanadium removal in aqueous streams |
| 12/28/1993 | US5273735 Process for the preparation of sodium dichromate |
| 12/21/1993 | US5271912 Enzymatic processing of materials containing chromium and protein |
| 12/15/1993 | CN1023107C Process for recovery of chromium from waste solution for electroplating chromium |
| 11/02/1993 | US5258365 CrTlSrCaCuO and related superconducting systems |
| 10/19/1993 | US5254321 Reduction; precipitation of chromium oxide; recycling |
| 10/19/1993 | US5254162 Brown spinel pigments based on zinc chromite, method of their production and use |
| 10/05/1993 | US5250274 Process for the production of sodium dichromate |
| 09/16/1993 | WO1993017970A1 Enzymatic processing of materials containing chromium and protein |
| 09/16/1993 | WO1993017959A1 Production of transparent cationically homogeneous refractory oxides of nanometer-scale particle size diameters at reduced temperatures |
| 09/08/1993 | EP0559590A1 Process for obtaining metallic hydroxides |
| 08/31/1993 | US5240493 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 08/25/1993 | EP0557089A1 Sunscreen agents containing layered double hydroxides |
| 08/05/1993 | DE4202741A1 Metallurgical grade chromic oxide prodn. - using oxidising agent addn. to obtain low sulphur@ content prod. |
| 08/04/1993 | CN1074958A Process for recovery of waste chrome-plating bath solution by concentration, smelting and purifying |
| 08/04/1993 | CN1074948A Process and plant for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 08/04/1993 | CN1074888A Method for comprehensive utilization of chrome slag by back-melting |
| 07/22/1993 | WO1993014232A1 Process and plant for the reduction of hexavalent chromium contained in the residue resulting from the processing of chromium minerals |
| 07/22/1993 | WO1993014023A1 Process for the production of a powder of fine particles and a plant for performing said process |
| 07/21/1993 | EP0552133A1 Process for preparing submicron/nanosize ceramic powders from precursors incorporated within a polymeric foam |
| 06/30/1993 | EP0548642A1 Magnetic recording medium |
| 06/09/1993 | EP0545757A1 Process for the preparation of perovskites on the basis of manganese or chromium and perovskites so obtained |
| 06/01/1993 | US5215727 Method of making chromic oxide |
| 05/30/1993 | CA2084010A1 Process for the preparation of manganese or chromium perovskites and perovskites therefrom |
| 05/25/1993 | US5213777 Extraction of uranium values using an imidazole extractant |
| 04/21/1993 | EP0399035B1 Method of removing arsenic and/or other amphoteric elements from sludge and solid waste materials |
| 04/20/1993 | US5204073 Toxicity elimination and comprehensive utilization of chrome residues |
| 04/14/1993 | CN1070892A Made method of sodium dichromate |
| 04/06/1993 | US5200383 Method for the production of catalytically active mixed phases |
| 04/06/1993 | US5200041 Composite element incorporating a polyether or copolyether, its preparation process and its use for extracting and separating metal cations |
| 03/31/1993 | EP0534109A1 Brown spinel pigment on the basis of zinc chromite, process for its preparation and use |
| 03/10/1993 | CN1069711A New technology for comprehensive utilization of waste liquid of sodium hydrosulphate in production of chromate |
| 03/10/1993 | CA2076455A1 Process for making chromic acid |
| 02/24/1993 | EP0527811A1 A process and plant for the preparation of alkaline chromates from chromium minerals. |
| 02/24/1993 | CN1069294A Hard coating, workpiece coated by such hard coating and method of coating such workpiece by such hard coating |
| 02/09/1993 | US5185301 Sinter reactive lanthanum chromite and process for making it |
| 02/04/1993 | DE4125910C1 Recovery of chromium from waste water - comprises adding base to waste water contg. trivalent chromium and organic solvent to ppte. chromium hydroxide |
| 02/03/1993 | EP0525116A1 Sinter reactive lanthanum chromite and process for making it |
| 01/26/1993 | US5181994 From ferrochrome; electrolysis |
| 12/23/1992 | EP0406234B1 Process for recovering chromic anhydride from exhausted aqueous chromium plating bath solutions with exploitation of the recovered chromium |
| 12/08/1992 | US5169811 Ceramic powder mixture of lanthanum, chromium, magnesium and/or calcium oxides with boron oxide and lanthanum oxide as sintering aids; powder compacts |
| 12/01/1992 | US5167708 Trivalent chromium oxide; chromate-free pigments by annealing with boric acid or phosphorus pentoxide |
| 11/19/1992 | EP0513662A1 Work piece coated with a hard layer and process for coating with the layer |
| 11/18/1992 | CN1066296A Method for treatment of chromium slag for comprehensive toxicity removal |
| 11/17/1992 | US5164173 Preparation of stabilized acicular ferromagnetic chromium dioxide |
| 10/29/1992 | DE4209892A1 Verfahren zum entfernen von vanadium aus einem waessrigen strom und verwendung des verfahrens bei der herstellung von natriumbichromat A method of removing vanadium from an aqueous stream and using the method during the production of sodium bichromate |
| 10/28/1992 | CN1065687A Chromium slag leaching and smelting detoxication method |
| 10/14/1992 | EP0508697A1 A re-calcination and extraction process for the detoxification and comprehensive utilization of chromic residues |
| 10/14/1992 | CN1065257A Preparation of super-fine powdered chromium oxide by laser multi-photon dissociation and its apparatus |
| 10/14/1992 | CN1018628B Process for preparing chrome yellow with galena |
| 10/07/1992 | EP0507174A1 Process for preparing chromiumtrioxide-containing pigments |
| 09/24/1992 | DE4109434A1 Regeneration of waste chromate solns. by pptn. and electrolysis - to recover chromic acid and barium-contg. precipitant |
| 09/17/1992 | WO1992012929A3 Beneficiated lanthanum chromite for low temperature firing |
| 09/16/1992 | CN1064459A Method for comprehensive utilization of sodium sulfate containing chromium |
| 09/02/1992 | CN1064065A Process for preparing ultra-fine lead chromate |
| 09/01/1992 | US5143751 Forming solution of lanthanum, chromium and dopant metal compounds, mixing with acids and alcohol solutions, esterification and polymerization, pyrolysis, and calcination to remove organic component |
| 08/26/1992 | EP0391938B1 Preparation of lanthanum chromite powders by sol-gel |
| 08/18/1992 | US5140604 Mixed strontium and lanthanide oxides and a laser using monocrystals of these oxides |
| 08/06/1992 | WO1992012929A2 Beneficiated lanthanum chromite for low temperature firing |
| 08/05/1992 | EP0497542A1 Method for producing lanthanum chromite film and method for producing interconnector for solid electrolyte type fuel cells |
| 07/28/1992 | US5133947 Reduction, precipitation |
| 07/23/1992 | DE4119499C1 Ceramic powder sinters for fuel cells - intensively mixes starting materials esp. nitrate(s) in water and citric acid and concentrates soln. until unstirrable before azeotropic distn. |