| Patents for C01F 7 - Compounds of aluminium (12,677) |
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| 09/28/1991 | WO1991014654A1 Aluminum-base oxides, moldings thereof, and production of said oxides |
| 09/25/1991 | CN1054757A High-effective composite coagulant and its manufacturing method |
| 09/24/1991 | US5051394 Precipitation and roasting |
| 09/24/1991 | US5051243 Mixing red mud in acid sulfur dioxide solution to form a residue for use as a weighting agent for drilling fluids |
| 09/19/1991 | WO1991014019A2 Process and device for regenerating alkaline solutions for pickling aluminium |
| 09/19/1991 | WO1991013831A1 Magnesium aluminate with controlled surface area |
| 09/19/1991 | DE4008379A1 Verfahren und anlage zum regenerieren von alkalihaltigen aluminiumbeizloesungen Method and system for regeneration of alkaline aluminiumbeizloesungen |
| 09/17/1991 | US5049371 Process for the preparation of monodisperse ceramic powders |
| 09/17/1991 | US5049233 Recovery of sodium hydroxide and aluminum hydroxide from etching waste |
| 09/12/1991 | DE4107191A1 Iridium catalyst for hydrazinolysis - prepd. on aluminium oxide carrier of large surface area |
| 09/11/1991 | EP0445543A1 Process for the preparation of coarse grained alumunium hydroxyde particles |
| 09/11/1991 | CN2084472U Waterless aluminium chloride producing device |
| 09/10/1991 | CA1288576C Process for producing aluminum hydroxide |
| 09/10/1991 | CA1288575C .alpha.-ALUMINA IN THE FORM OF SPHERICAL, NON AGGREGATED PARTICLES HAVING A NARROW SIZE DISTRIBUTION AND SIZES BELOW 2 MICRONS, AND PROCESS FOR PREPARING THE SAME |
| 09/10/1991 | CA1288574C Process for preparing hydrated alumina consisting essentially of spherical particles by homogeneous precipitation |
| 09/04/1991 | EP0444564A2 Direct process for the preparation of activated antiperspirant salts |
| 09/03/1991 | US5045300 Reacting amine.aluminum trichlorde complex and a bifluoride |
| 09/03/1991 | US5045244 Preparation of metal halide-amine complexes |
| 09/03/1991 | CA1288542C Oxide sol using reactive monomer as dispersion medium |
| 09/03/1991 | CA1288213C Method for the obtention of special alumina from the powder produced in the calcination of metallurgical alumina |
| 08/28/1991 | EP0442951A1 Precipitant or flocculant for treatment of waste water and process involving their use |
| 08/27/1991 | US5043077 Adding humic acids and esters to reduce viscosity |
| 08/22/1991 | WO1991012205A1 Process for the precipitating of aluminium hydroxide from bayer process liquor |
| 08/20/1991 | US5041269 Utilizing a dextran-synthetic polymer blend as flocculant, lowers turbidity |
| 08/14/1991 | EP0107700B1 Method for fabricating ceramic materials |
| 08/14/1991 | CN1053781A Battery of precipitators |
| 08/13/1991 | CA1287474C Controlled crystal form of aluminum hydroxide |
| 08/13/1991 | CA1287473C Aluminum hydroxide |
| 08/13/1991 | CA1287472C Method for producing a flaky material |
| 08/06/1991 | US5037911 Addition polymerization using a catalyst which is activated by heating |
| 08/06/1991 | CA2018155A1 Alumina crystal growth additive |
| 07/25/1991 | WO1991010629A1 Process for using dross residues to produce refractory products |
| 07/25/1991 | WO1991010505A1 LAYERED DOUBLE HYDROXIDE SORBENTS FOR THE REMOVAL OF SOx FROM FLUE GAS AND OTHER GAS STREAMS |
| 07/24/1991 | CN1013248B Method of treating by silicopyrohydrolysis worn linings from hall-heroult electrolysis tanks |
| 07/23/1991 | US5034360 Process for the production of a ceramic polycrystalline abrasive |
| 07/23/1991 | CA1286479C Transparent alumina microspheres |
| 07/17/1991 | CN1013200B Alumina treated by silicon and/or fluorine |
| 07/17/1991 | CN1013191B Prepn. of alumina by improved bayer's digestion process |
| 07/16/1991 | US5032555 Process for making zirconia-alumina |
| 07/16/1991 | US5032378 Catalyst supports |
| 07/11/1991 | WO1991009978A1 Process for converting dross residues to useful products |
| 07/09/1991 | US5030424 Digestion with dilute acid, separation |
| 07/02/1991 | US5027891 Method for transferring heat between process liquor streams |
| 07/02/1991 | CA1285373C Bayer cycle sodium aluminate solution purification through elimination of sodium oxalates |
| 06/26/1991 | EP0434222A1 Ultra high purity metal fluorides and their preparation |
| 06/26/1991 | EP0433450A1 Method of obtaining complex oxides |
| 06/25/1991 | US5026404 Abrasives |
| 06/19/1991 | CN1052291A Amononium aluminium sulfate producing process from waste water containing aluminium |
| 06/12/1991 | EP0431867A2 Detergent composition |
| 06/12/1991 | EP0431377A1 Process for the preparation of finely divided ceramic oxide powder from precursor compounds |
| 06/11/1991 | US5023071 Emulsifying a mixture of water and non-polar organis solvent containing metal alkoxide; hydrolysis; precipitation |
| 06/11/1991 | CA1284844C Brine treatment using ethylene/carboxylic acid polymers |
| 06/05/1991 | EP0429548A1 Small sized alpha alumina particles and platelets. |
| 06/04/1991 | US5021231 Recycling; utilizes spent sulfuric acid; sulfur dioxide contamination limited |
| 06/03/1991 | CA2031330A1 Process for the preparation of finely divided ceramic oxide powders from precursor compounds |
| 05/28/1991 | WO1991008173A1 Calcination process for the production of alumina from alumina trihydrate and apparatus therefor |
| 05/28/1991 | US5019367 Method for producing boehmite |
| 05/28/1991 | US5019360 Magnetic separation, extraction, precipitation |
| 05/28/1991 | CA2069628A1 High efficiency process for producing alumina and apparatus therefor |
| 05/23/1991 | DE4036448A1 Bauxite digestion in ball mill - for simultaneous fine grinding, leaching and silica removal |
| 05/22/1991 | CN1051541A Polymerized aluminium chloride synthesized from waste slag generated in processing aluminium shaped material |
| 05/14/1991 | US5015409 For cleansers, corrosive products household products or personal care products |
| 05/08/1991 | EP0425922A1 Process for the purification and concentration of diluted impure hydrochloric acid |
| 05/07/1991 | CA1283984C Removal of metals from solutions |
| 05/02/1991 | EP0425325A1 Alpha alumina macro crystals in the form of platelets and process for their production |
| 05/02/1991 | DE3936230A1 Unter einwirkung von wasser stabile schaeume auf der basis von aluminiumoxid, daraus erstellte koerper sowie mischungen fuer deren herstellung Under the influence of water-stable foams based on alumina, and mixtures prepared therefrom koerper for their production |
| 05/01/1991 | WO1991006516A1 Aluminium oxide-based foams which are stable under the effect of water, bodies made therefrom and mixtures for their production |
| 05/01/1991 | CA2069335A1 Aluminium oxide-based foams which are stable under the effect of water, bodies made therefrom and mixtures for their production |
| 04/30/1991 | US5011612 Fatty acid salt as filtration aid |
| 04/30/1991 | US5011508 Bonding protuberant particles; sintering |
| 04/24/1991 | EP0423490A1 Friable particles and processes for preparing same |
| 04/23/1991 | US5009674 Abrasives |
| 04/17/1991 | EP0404788A4 Metallic surface protection |
| 04/17/1991 | CN1012354B Improvement of technique of hydrolyzing low-carbon alkoxy aluminium for preparing aluminium oxide |
| 04/16/1991 | US5008420 Alkylaluminum alkoxide-magnesium alkoxide coordination compound |
| 04/16/1991 | US5008233 Reacting alumina with ammonium hexafluorosilicate |
| 04/16/1991 | US5008095 Clear and colorless basic aluminum chlorosulfates |
| 04/16/1991 | US5008089 Recovery of alumina from bauxite |
| 04/10/1991 | EP0421028A1 Method for preparing basic aluminum halides and product produced therefrom |
| 04/09/1991 | CA1282667C Process for retarding and controlling the formation of gels or precipitates derived from aluminum and corresponding compositions, plus the corresponding applications - in particular regarding oil wells |
| 04/03/1991 | CN1050366A Alpha-alumina macrocrystals and making process therefor |
| 03/27/1991 | CN1050145A Alumina particles |
| 03/26/1991 | US5002909 Mixed oxides of alumina and zirconia consisting essentially of spherical particles having a narrow granulometric distribution and process for their preparation |
| 03/26/1991 | CA1281885C Method and device for decomposing, without agitation, alumina production sodium aluminate liquors |
| 03/22/1991 | CA2025037A1 Platelet-shaped x-alumina macrocristals and process for their preparation |
| 03/20/1991 | EP0417798A1 Process for the preparation of short prismatic aluminium hydroxide and its use as filler or pigment |
| 03/20/1991 | EP0417360A1 Dewatering of alumina trihydrate, and dewatering aid |
| 03/12/1991 | US4999323 Production of ceramic powders by emulsion precipitation processes and the products thereof |
| 03/12/1991 | US4999170 Method for removing sodium oxalate from caustic aluminate liquors |
| 03/12/1991 | CA2016262A1 Process for sizing calcium carbonate-containing papers with resin size dispersions |
| 03/06/1991 | EP0414695A1 Ceramic powder and a process for the preparation thereof. |
| 03/06/1991 | CN1011883B Prodn. sandy aluminium hydroxide |
| 02/27/1991 | CN1049485A Process for production of composite of metal oxides, composite powders of metal oxides and ceramic materials |
| 02/19/1991 | US4994253 Process for the production of large boehmite particles |
| 02/19/1991 | US4994244 Process for producing alumina from bauxite |
| 02/19/1991 | CA1280270C Basic aluminum chlorosulphate, its preparation and its use as a clotting agent |
| 02/13/1991 | CN1049140A Basic aluminum chloride purified agent made by waste catalyzer |
| 02/05/1991 | US4990268 Enhanced oil recovery |
| 02/05/1991 | US4990181 Aluminide structures and method |
| 02/05/1991 | US4989794 Milling in liquid suspension classification, recycling |