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| Number | Title | Issue Date |
| 7341974 | Method for preparing a catalyst for partial oxidation of propylene The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex... | 03/11/2008 |
| 7217836 | Process for producing (meth)acrolein and/or (meth)acrylic acid A method for producing (meth)acrolein and/or (meth)acrylic acid by subjecting isobutylene and the like or propylene to a vapor-phase catalytic oxidation with molecular oxygen in the presence of a solid oxidation catalyst in a tubular type of fixed bed reactor, where... | 05/15/2007 |
| 7154009 | Long-term operation of a heterogeneously catalyzed gas phase partial oxidation of propene to acrolein A process for the long-term operation of a heterogeneously catalyzed gas phase partial oxidation of propene to acrolein, in which the temperature of the fixed catalyst bed is increased over the time and the gas phase partial oxidation is interrupted at least once pe... | 12/26/2006 |
| 7122707 | Method for producing an annular shell catalyst and use thereof for producing acrolein Coated catalysts which are suitable for the gas-phase catalytic oxidation of propene to acrolein are prepared by a process in which rings are used as supports and water is used as a binder. ... | 10/17/2006 |
| 6812366 | Catalyst useful for oxidation reactions A catalyst useful for oxidation reactions is disclosed. The catalyst is useful for the gas phase oxidation of alkanes, propylene, acrolein, or isopropanol to unsaturated aldehydes or carboxylic acids. ... | 11/02/2004 |
| 6545178 | Method for production of acrolein and acrylic acid from propylene In the production of acrolein and acrylic acid by the catalytic gas phase oxidation of propylene with a molecular oxygen-containing gas, a method is provided which enables acrolein and acrylic acid to be stably produced with a high yield for a long time f... | 04/08/2003 |
| 6410785 | Method for producing acrolein by heterogeneous catalytic gas-phase partial oxidation of propene In a process for the preparation of acrolein by gas-phase partial oxidation under heterogeneous catalysis, a reaction gas starting mixture which contains propene and molecular oxygen in a molar C3 H6 :O2 ratio of >1 is rea... | 06/25/2002 |
| 6346646 | Process for producing methacrolein and methacrylic acid A process for producing methacrolein and methacrylic acid by catalytically oxidizing isobutylene or tertiary butanol in the presence of a catalyst comprising a compound oxide containing molybdenum, bismuth and iron as the essential components, wherein a c... | 02/12/2002 |
| 6080893 | Process for the manufacture of acrolein from propylene by a redox reaction and use of a solid mixed oxide composition as redox system in the said reaction A mixed oxide solid composition of formula (I): Mo12 Wa Bib Fec Cod Nie Sif Kg Snh Ox (I) where Oࣘaࣘ5, 0.5ࣘb... | 06/27/2000 |
| 5977416 | Dehydration catalyst and process for producing a monoalkylether of a dihydric phenolic compound using same A dehydration catalyst useful for producing a monoalkylether of dihydric phenolic compound by a dehydration reaction of a dihydric phenolic compound with a lower alkyl alcohol with a high conversion at a high selectivity, comprises at least one inorganic ... | 11/02/1999 |
| 5929275 | Catalyst and process for producing unsaturated aldehyde and unsaturated acid A catalyst for the production of unsaturated aldehyde and unsaturated acid, obtained by loading a catalytically active component on a carrier and calcining the loaded catalyst, characterized by an average particle diameter of the catalyst of 4 to 16 mm, a... | 07/27/1999 |
| 5583086 | Cesium containing multimetal oxide catalyst compositions for the preparation of methacrolein by gas-phase-catalytic oxidation Cesium based multimetal oxide compositions which are suitable as catalysts for the gas-phase-catalytic oxidative preparation of methacrolein from isobutene or tert-butanol or its methyl ether. The catalysts are characterized by increased selectivity for t... | 12/10/1996 |
| 5491258 | Molded catalyst or supported catalyst for synthesizing methacrolein and methacrylic acid, a process for production thereof, and a process of use thereof For providing a molded catalyst or a supported catalyst which has an excellent mechanical strength and is intended for producing methacrolein and methacrylic acid from isobutylene or tertiary butanol, the surface of a molded catalyst or a supported cataly... | 02/13/1996 |
| 5449821 | Multimetal oxide compositions for gas-phase catalytic oxidation A process for the gas phase catalytic oxidation of a C3-6 alkane, alkanol, alkene or alkenal using as a catalyst multimetal oxide compositions of the formula I, [X1a X2b Ox ]p [X... | 09/12/1995 |
| 5312975 | Process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid A process for the preparation of 5-(2,4-difluorophenyl)-salicylic acid comprising the reaction of an organometallic derivative with a suitable substituted benzene in the presence of a transition-metal based catalyst is described.... | 05/17/1994 |
| 5225602 | Phenylacetaldehydes and the preparation of phenylacetaldehydes Phenylacetaldehydes of the structure (I) ##STR1## where the substituents X are 2,4-dichloro, difluoro, trifluoro, tetrafluoro, p-trifluoromethyl, 2-methyl-4-fluoro, haloalkoxy or haloalkylthio radicals or are adjacent Cl, F, CF3, alkyl, al... | 07/06/1993 |
| 5144090 | Method for preparing acrolein or methacrolein A method for preparing acrolein or methacrolein comprises subjecting propylene, secondary propanol, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of a catalyst represented by the following general f... | 09/01/1992 |
| 4816603 | Process for the production of methacrolein and methacrylic acid The present invention provides a process for the production of methacrolein and methacrylic acid by the gas phase catalytic oxidation of isobutylene or t-butanol at high temperature using molecular oxygen in the presence of catalyst consisting of molybden... | 03/28/1989 |
| 4778930 | Process for the oxidation of olefins using catalysts contaning antimony The present invention is a process for the oxidation of olefins to unsaturated aldehydes and acids using a catalyst containing antimony, iron, bismuth, molybdenum plus at least one of nickel, cobalt, magnesium, zinc, cadmium or calcium within certain comp... | 10/18/1988 |
| 4746753 | Preparation of acrylonitrile from propylene, oxygen and ammonia in the presence of an alkali metal promoted bismuth, cerium, molybdenum, tungsten catalyst Bismuth cerium molybdate catalysts promoted with alkali metal and other optional ingredients provide high yields of acrylonitrile in the ammoxidation of propylene.... | 05/24/1988 |
| 4709070 | Process for improving activity of tellurium containing metal oxide catalysts A process for improving the activity of tellurium containing metal oxide catalysts useful as catalysts for oxidation, ammoxidation or oxidative dehydrogenation of organic compounds by heating the catalysts together with an activity-improving agent to a te... | 11/24/1987 |
| 4657956 | Compounds useful as stabilizing agents for rubber vulcanizates Additives for rubber compositions, giving vulcanizates having improved retention of optimum physical properties, are compounds having the formula R--S--B--S--R where B is an organic bridging group and R is an electron-withdrawing group, for example CN, CC... | 04/14/1987 |
| 4604370 | Process for regenerating a catalyst A process for regenerating a Mo.Bi-based multi-oxide catalyst the catalytic performance of which has deteriorated as a result of its use in vapor-phase catalytic oxidation of propylene or isobutene to prepare acrolein or methacrolein, respectively, which ... | 08/05/1986 |
| 4564703 | Process for preparing methacrylic acid In a process for preparing methacrylic acid by the vapor-phase catalytic oxidation of methacrolein or a methacrolein-containing mixture with molecular oxygen in the presence of an oxidation catalyst; the improvement wherein said process comprises a first-... | 01/14/1986 |
| 4556731 | Process for the oxidation of olefins using catalysts containing various promoter elements Iron-bismuth-molybdate catalysts further containing specific promoter elements have been found to exhibit excellent redox stability even under high stress conditions in the catalytic oxidation of olefins to unsaturated aldehydes and acids.... | 12/03/1985 |
| 4532083 | Multiply promoted Sn/Sb oxide catalysts Certain multiply promoted Sn/Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolef... | 07/30/1985 |
| 4479013 | Catalyst and process for unsaturated aldehydes A catalyst composition useful for the oxidation of olefins, particularly the vapor phase oxidation of isobutylene and/or tertiary butyl alcohol to produce methacrolein, consists essentially of the combination of oxides of molybdenum, cobalt, iron, bismuth... | 10/23/1984 |
| 4473506 | Iron selenium tellurium oxide catalysts Oxide complex catalysts of iron, selenium and tellurium provide good yields of acrylonitrile in the ammoxidation of propylene with high selectivities at low temperature.... | 09/25/1984 |
| 4453006 | Oxidation of propylene or isobutylene with attrition resistant catalysts A method for preparing attrition resistant, high percentage active component catalysts comprises using two types of silica, one of which is fumed silica, in a two stage catalyst preparation.... | 06/05/1984 |
| 4404397 | High conversion of C3 and C4 olefins to corresponding unsaturated aldehydes and acids with stable molybdenum catalysts A stabilized heteropoly molybdate catalyst precursor in calcined form and containing anionic molybdenum in defect state is surface impregnated with certain metal cations. The stabilized precursor is one obtained by incorporating into the reaction product ... | 09/13/1983 |
| 4380664 | Process for producing unsaturated aldehydes, and unsaturated fatty acids At least one olefinic hydrocarbon of 3 to 4 carbon atoms is oxidized catalytically in the gas phase in the presence of molecular oxygen at 200°-450° C. to produce the corresponding aldehyde and acid over a calcined catalyst of the formula Moa... | 04/19/1983 |
| 4351963 | Aliphatic olefin oxidation using catalyst containing Sn, P, O, Li A method for preparing aldehyde from aliphatic olefin in the presence of oxygen and a catalyst containing Sn, P, Li, and O.... | 09/28/1982 |
| 4339394 | Process of ammoxidation of olefins in the presence of multiply promoted Sn-Sb oxide catalysts Certain multiply promoted Sn-Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolef... | 07/13/1982 |
| 4332971 | Process for the oxidation of olefinically unsaturated hydrocarbons to aldehydes using attrition resistant catalysts Olefin oxidation catalysts having improved attrition resistance are produced by incorporating a substantially uniform-appearing coating of a partially calcined catalytic material onto an inert porous support containing sorbed aqueous silica sol and then c... | 06/01/1982 |
| 4323520 | Preparation of methacrylic derivatives from tertiary-butyl-containing compounds The present invention relates to a process for the conversion of tertiary-butyl-containing compounds to methacrylic derivatives, and more particularly to a process for the conversion of tertiary-butyl-containing compounds selected from the group consistin... | 04/06/1982 |
| 4322368 | Copper-promoted antimony phosphate oxide complex catalysts Oxide complexes comprising copper-promoted antimony phosphates have been found to exhibit significant catalytic activity in various oxidation-type reactions such as the ammoxidation of propylene to produce acrylonitrile.... | 03/30/1982 |
| 4317747 | Promoted U-Sb-oxide catalysts Certain multiply promoted U-Sb-oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxyde-hydrogenation of olefins to diolef... | 03/02/1982 |
| 4316855 | Multiply promoted Sn-Sb oxide catalysts Certain multiply promoted Sn-Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolef... | 02/23/1982 |
| 4316856 | Molybdenum-promoted antimony phosphate oxide complex catalysts also containing at least one of bismuth and tellurium Molybdenum-promoted antimony phosphates also containing at least one of tellurium and bismuth have been found to exhibit significant catalytic activity in various oxidation-type reactions.... | 02/23/1982 |
| 4311611 | Process for regenerating an antimony containing oxide catalyst A process for regenerating a deteriorated antimony containing oxide catalyst comprising as essential components of (i) antimony and (ii) at least one metal element selected from the group consisting of iron, cobalt, nickel, manganese, uranium, cerium, tin... | 01/19/1982 |
