| Patents for B01J 21 - Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium (28,523) |
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| 04/30/1991 | US5011953 Catalytically reacting 2-alkylallyl chlorides with alkyl hydroperoxides; efficiency |
| 04/30/1991 | CA1283647C Layered silicates and their synthesis |
| 04/30/1991 | CA1283646C Layered metal oxides containing interlayer oxides and their synthesis |
| 04/24/1991 | EP0424187A1 Process for the preparation of pillared clays and the pillared clays obtained from the process |
| 04/24/1991 | EP0423526A2 Process for the preparation of triethylenediamine and piperazine |
| 04/24/1991 | EP0423490A1 Friable particles and processes for preparing same |
| 04/23/1991 | US5010052 Zirconium dioxide gas desulfurization catalyst |
| 04/18/1991 | WO1991004790A1 Amorphous alloy catalyst for cleaning exhaust gas |
| 04/18/1991 | DE3933860A1 Verfahren zur herstellung von alkyl-polyethoxyethersulfaten A process for the preparation of alkyl polyethoxyethersulfaten |
| 04/17/1991 | EP0422999A1 Catalysts for treating exhaust gases and process for treating these exhaust gases |
| 04/17/1991 | EP0422591A2 Ortho-alkylation of aromatic amines |
| 04/17/1991 | EP0422590A2 Ortho-alkylation of aromatic amines |
| 04/17/1991 | EP0422013A1 Method for intercalating organic-swelled layered metal chalcogenide with polymer chalogenide by treatment with organic, hydrolyzable, polymeric chalcogenide precursor wherein organic hydrolysis by-products are removed |
| 04/16/1991 | US5008465 Preparing ether by heating alcohol with olefin |
| 04/16/1991 | US5008463 Process for the preparation of formaldehyde |
| 04/16/1991 | US5008233 Reacting alumina with ammonium hexafluorosilicate |
| 04/16/1991 | US5008094 Alkali or alkaline earth metal silicates with specific molar ratios and containing tetramethylammonium ion |
| 04/16/1991 | US5008047 Catalytic purification using Lewis acid catalyst on support |
| 04/12/1991 | WO1991005764A1 Process for making alkyl polyethoxy ether sulphates |
| 04/12/1991 | CA2067789A1 Process for the production of alkyl polyethoxyether sulfates |
| 04/11/1991 | CA2027191A1 Ortho-alkylation of aromatic amines |
| 04/11/1991 | CA2027173A1 Ortho-alkylation of aromatic amines |
| 04/10/1991 | EP0421679A1 Process for the preparation of glycol ethers |
| 04/10/1991 | EP0421678A1 Process for the preparation of catalysts |
| 04/10/1991 | EP0421677A1 Process for the preparation of glycol ethers |
| 04/10/1991 | EP0421196A1 One-step process for the preparation of alcohols |
| 04/10/1991 | CA2027015A1 Catalysts for treating gaseous effluents, and treatment process for said effluent |
| 04/05/1991 | CA2026138A1 Process for the preparation of catalysts |
| 04/05/1991 | CA2026116A1 Process for the preparation of glycol ethers |
| 04/03/1991 | EP0420770A1 Process for the preparation of dihydroxy esters |
| 04/03/1991 | EP0419581A1 Method for intercalating organic-swelled layered metal chalcogenide with a polymeric chalcogenide by plural treatments with polymeric chalcogenide precursor |
| 04/03/1991 | EP0404908A4 Silica/alumina cogel catalysts |
| 04/02/1991 | US5004846 Process for producing nitrobenzenes |
| 04/02/1991 | US5004719 Containing one or more of silica, alumina or hafnium oxide; catalyst supports |
| 03/28/1991 | WO1991004960A1 Process for the preparation of dihidroxy esters |
| 03/28/1991 | CA2024582A1 Amorphous alloy catalysts for conversion of exhaust gases to harmless gases |
| 03/27/1991 | EP0419265A1 A process for converting and upgrading organic resource materials in aqueous environments |
| 03/27/1991 | EP0418682A1 Metal doped carbon fibres catalysts, their production and their use |
| 03/27/1991 | EP0418573A1 Process for treating new or aged graphite powder to improve its effectiveness as a support for metal catalysts |
| 03/27/1991 | CN1050145A Alumina particles |
| 03/26/1991 | US5003121 Production of alkyl aromatic compounds |
| 03/26/1991 | US5002922 Oxides of Zirconium Copper, Cobalt and/or Nickel |
| 03/26/1991 | US5002920 Catalyst for ozone decomposition |
| 03/26/1991 | US5002918 Molded articles based on pyrogenically produced mixed-oxide systems of silicon dioxide and aluminum oxide, a method for manufacturing them and their use |
| 03/26/1991 | US5002917 Molded articles based on pyrogenically produced titanium dioxide method for their manufacturing and uses |
| 03/20/1991 | EP0417629A1 Attrition resistant catalyst support |
| 03/19/1991 | US5001260 Tetracarboxylic acids |
| 03/15/1991 | WO1991014670A1 Process for producing branched fatty acids and their esters |
| 03/12/1991 | US4999328 Hydrocracking of heavy oils in presence of petroleum coke derived from heavy oil coking operations |
| 03/12/1991 | CA1281336C Method of preparing acetal or ketal |
| 03/06/1991 | EP0415145A1 Catalyst for removal of nitrogen oxides and method for removal of nitrogen oxides by use of the catalyst |
| 03/05/1991 | US4997801 In situ sulfurization |
| 03/05/1991 | CA1281039C Process for the preparation of decabromodiphenyl ether |
| 02/27/1991 | EP0414207A2 Method for preparing alpha-(-4-isobutylphenyl) propionic acid or its precursor |
| 02/26/1991 | US4996385 Produced from titanium chelates with coordination number at least five; catalyst for alkylation, isomerization, dehydration |
| 02/26/1991 | US4996368 Process for the purification and stabilization of perfluoropolyethers |
| 02/26/1991 | US4996363 Contacting with Group 2A metal silicate catalyst; aluminum-free |
| 02/26/1991 | US4996007 Process for the oxidation of alcohols to aldehydes/acids/esters |
| 02/26/1991 | US4995964 Catalyst selectivity, stability |
| 02/22/1991 | WO1991002711A2 7,7-dimethylnorbornane derivatives |
| 02/22/1991 | CA2065014A1 7-7-dimethylnorbornane derivatives |
| 02/20/1991 | CN1049320A Catalyst for selective oxidation of sulphur compounds to elemental sulphur, process for preparing such catalyst and method for seletive oxidation of sulphur compounds to elemental sulphur |
| 02/20/1991 | CN1049295A Process for catalytic decomposition of chlorofluoro-alkanes |
| 02/20/1991 | CN1049294A Method and apparatus for simultaneously scrubbing cement kiln exhaust gas and producing useful by-products therefrom |
| 02/19/1991 | US4994583 Process for the preparation of epsilon-caprolactone |
| 02/19/1991 | US4994425 Magnesia-silica cogels with controlled porosity for hydrorefining catalysts |
| 02/13/1991 | EP0412785A1 A method of pretreating a particulate catalyst |
| 02/13/1991 | EP0412614A2 Amines catalysis |
| 02/13/1991 | EP0412613A2 Amines catalysis using metallic phosphate condensation catalysts having a cyclic structure |
| 02/13/1991 | EP0412611A2 Promoted amines catalysis |
| 02/13/1991 | EP0412456A2 A process for the catalytic decomposition of chlorofluoro-alkanes |
| 02/12/1991 | US4992608 Method for preparing cumene |
| 02/12/1991 | US4992406 Alumina or zirconia binder |
| 02/12/1991 | US4992404 Denitrification catalyst |
| 02/12/1991 | US4992319 Activated carbon supporting honeycomb structure and process for fabricating the same |
| 02/09/1991 | CA2022780A1 Promoted amines catalysis |
| 02/09/1991 | CA2022777A1 Amines catalysis |
| 02/09/1991 | CA2022776A1 Amines catalysis using metallic phosphate condensation catalysts having a cyclic structure |
| 02/07/1991 | WO1991001298A1 Process for the preparation of aromatic nitriles |
| 02/06/1991 | EP0411456A1 Method for the preparation of 2-Imidazolines |
| 02/06/1991 | EP0411053A1 Method for intercalating organic-swelled layered metal chalcogenide with polymer chalcogenide |
| 02/06/1991 | CA2022212A1 Process for the catalytic decomposition of chlorofluoro-alkanes |
| 02/05/1991 | US4990662 Process for preparation of alpha, beta-unsaturated acids |
| 02/01/1991 | WO1991001804A1 Process for regenerating a catalyst and resultant regenerated catalyst and production of olefins by catalytic ether decomposition using regenerated catalyst |
| 02/01/1991 | CA2064040A1 Process for regenerating a catalyst and resultant regenerated catalyst and production of olefins by catalytic ether decomposition using regenerated catalyst |
| 01/30/1991 | EP0410694A2 Mullite articles and their manufacture |
| 01/30/1991 | CN1048847A Process for preparing aromatic nitriles |
| 01/29/1991 | US4988659 A hydrocarbon conversion catalyst formed by mixing a silicate solution, aging, adjusting the ph, gelation, washing |
| 01/29/1991 | CA2020453A1 Thermal shock and creep resistant porous mullite articles |
| 01/24/1991 | DE3923979A1 Verfahren zur herstellung von aromatischen nitrilen A process for preparing aromatic nitriles |
| 01/23/1991 | EP0409353A1 Catalyst and process for the selective oxidation of hydrogen sulphide to elemental sulphur |
| 01/22/1991 | US4987260 Amination of phenols with alumina catalyst having ink bottle shaped pores |
| 01/22/1991 | US4987068 Porous inorganic support spheres which can be cleaned of surface biomass under fluidized bed conditions |
| 01/22/1991 | US4986835 Process for separating and recovering carbonic acid gas from gas mixture by adsorption |
| 01/16/1991 | EP0408506A2 New triazole compounds |
| 01/16/1991 | EP0408300A1 Low density/low surface area silica-alumina composition |
| 01/16/1991 | EP0408043A1 Inert ceramic catalyst bed support |
| 01/16/1991 | EP0407841A2 Method for the production of ethers from C4-C7-tert-alkenes and 2- to 6-valent alcohols |
| 01/16/1991 | EP0407840A1 Process for the preparation of pure C4-C7-tert.-alcenes |
| 01/16/1991 | EP0214147B1 Crystalline magnesia-silica composites and process for producing same |