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| Number | Title | Issue Date |
| 5958822 | Modified fluorosulfonic acids This invention concerns modified fluorosulfonic acid compounds possessing a sulfonic acid fluoride, chloride or ester group or a sulfonic acid or a salt of a sulfonic acid group at one end and respectively a hydrolyzable or hydrolyzed silane group at the ... | 09/28/1999 |
| 5952258 | Process for the preparation of pyridine using zeolite catalysts Disclosed is a process for the preparation of pyridine bases by a reaction of an aliphatic aldehyde and/or ketone with ammonia under gaseous phase using a specified catalyst in which a specified metal or combined metals are carried in or onto specified ze... | 09/14/1999 |
| 5935897 | Monomodal and polymodal catalyst supports and catalysts having narrow pore size distributions and their production Monomodal or polymodal catalyst supports or catalysts having a BET specific surface area of from 0.01 to 250 m2 /g and a monomodal or polymodal pore size distribution having a mean pore diameter of from 50 to 300,000 nm measured by the mercury ... | 08/10/1999 |
| 5935898 | Monomodal and polymodal catalyst supports and catalysts having narrow pore size distributions and their production Monomodal or polymodal catalyst supports or catalysts having a BET specific surface area of from 0.01 to 250 m2 /g and a monomodal or polymodal pore size distribution having a mean pore diameter of from 50 to 300,000 nm measured by the mercury ... | 08/10/1999 |
| 5925801 | Process for preparing high-octane gasoline components, and a catalyst A process for preparing high-octane gasoline components consists in that a feed stock, composed of isobutane and olefins, preferably butylenes, in a molar ratio between 1 and 40, is contacted at temperatures of from about 50 to about 160° C. and at press... | 07/20/1999 |
| 5905053 | Ethylene oxide catalyst A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, a fluorine component, and a pnictogen component from the group phosphorus, bismuth and an... | 05/18/1999 |
| 5883036 | Olefin oligomerization catalyst, process for preparing the same, and olefin oligomerization process using the same An olefin oligomerization catalyst comprises at least one oxide selected from alumina and silica.cndot.alumina having a sulfate ion supported thereon. The amount of the sulfate ion contained in the catalyst is desirably in the range of 0.3 to 60% by weigh... | 03/16/1999 |
| 5866501 | Dispersed anion-modified iron oxide catalysts for hydroconversion processes A dispersed fine-sized anion-modified iron oxide slurry catalyst having high surface area exceeding about 100 m2 /gm and high catalytic activity, and which is useful for hydrogenation and hydroconversion reactions for carbonaceous feed material... | 02/02/1999 |
| 5856609 | Aromatic hydrodealkylation process with sulfur oxide containing catalyst A catalyst composition and a process for hydrodealkylating a C9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises ... | 01/05/1999 |
| 5854167 | Ethylene oxide catalyst A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, a germanium or tin component, and a fluorine component the catalyst being essentially fre... | 12/29/1998 |
| 5821191 | Process for presulfiding hydrocarbon processing catalysts The present invention relates to a process for presulfiding hydrocarbon processing catalysts by impregnating the catalyst with an inorganic polysulfide solution containing at least one water-soluble oxygenated hydrocarbon such that at least a portion of s... | 10/13/1998 |
| 5786293 | Process for presulfiding hydrocarbon processing catalysts The present invention relates to a process for presulfiding hydrocarbon processing catalysts by impregnating the catalyst with an inorganic polysulfide solution such that at least a portion of said sulfide or sulfur is incorporated in the pores of said ca... | 07/28/1998 |
| 5786294 | Crystalline mesoporous zirconia catalysts having stable tetragonal pore wall structure Methods for the preparation of new sulfated mesoporous zirconia materials/catalysts with crystalline pore walls of predominantly tetragonal crystal structure, characterized by nitrogen physisorption measurement, X-ray diffraction, transmission electron mi... | 07/28/1998 |
| 5780383 | Solid superacid catalyst comprising group VII metal and having Ho less than -18 The invention is a solid catalyst having acid strength Ho less than -18. Such catalysts are characterized by the ability to react with very weak bases, such as butane, at relatively low temperatures, for example temperatures in the range from 2... | 07/14/1998 |
| 5753192 | Zirconia and sulfate in NOx traps to improved trapping and sulfur tolerance The invention is a nitrogen oxide trap comprising a porous support loaded with 6-15 wt. % strontium oxide and thereon, a mixture of: 0.5-5 wt. % precious metal catalyst selected from platinum, palladium, rhodium or mixtures thereof loaded, 3.5-15 wt. % zi... | 05/19/1998 |
| 5741753 | Nitrate-free catalyst for the wash-and-wear finishing of textiles Essentially nitrate-free catalyst for the wash-and-wear finishing of textiles with formaldehyde-free crosslinkers, comprising magnesium, tetrafluoroborate, chloride and sulfate ions in the molar weight ratios of (a) Mg2+ : BF4-... | 04/21/1998 |
| 5731256 | Alkylation catalyst for C4 -C5 isoparaffins using at least one C2 -C6 olefin The present invention concerns a catalyst comprising a porous organic or mineral support, preferably silica, and an acidic phase containing B(OSO2 CF3)3 and at least one acid selected from the group formed by sulphuric aci... | 03/24/1998 |
| 5652192 | Catalyst material and method of making The material of the present invention is a mixture of catalytically active material and carrier materials, which may be catalytically active themselves. Hence, the material of the present invention provides a catalyst particle that has catalytically activ... | 07/29/1997 |
| 5629257 | Solid superacid catalysts comprising platinum metal A sulfated solid catalyst is provided which comprises (1) oxide or hydroxide of Group III or Group IV element, e.g. zirconium, and (2) a first metal comprising a metal or combination of metals selected from the group consisting of platinum, palladium, nic... | 05/13/1997 |
| 5604173 | Desulfurization of sulfur compound-containing gases with vanadium catalysts Particular mixed vanadium/other metal catalysts, well suited for the desulfurization of gaseous effluents containing contaminating amounts of objectionable sulfur compounds, typically via the Claus reaction and notably in the presence of oxygen, comprise ... | 02/18/1997 |
| 5550096 | Catalyst for purifying nitrogen oxides from exhaust and waste gases A catalyst for the purification of an exhaust gas by the removal, through selective reduction, of nitrogen oxides present in the exhaust gas, which comprises (A) 80 to 95% by weight of a sulfur oxide-containing catalytic oxide obtained by thermally treati... | 08/27/1996 |
| 5504053 | Alkylene oxide catalysts having enhanced activity and/or stability Catalysts for the production of alkylene oxide by the epoxidation of alkene with oxygen comprise a silver impregnated support containing a sufficient amount of manganese component to enhance at least one of activity and/or efficiency and/or stability as c... | 04/02/1996 |
| 5478788 | Solid acid alkylation using a sulphated mixed oxide of titanium/nickel Disclosed is an alkylation catalyst to form adducts or alkylates of a C3 -C9 olefin with a C4 to C9 isoparaffin comprising a sulfated mixed oxide of titanium and nickel, wherein the percent by weight of titanium... | 12/26/1995 |
| 5447706 | Direct synthesis of hydrogen peroxide by heterogeneous catalysis, catalyst for the said synthesis and method of preparation of the said catalyst Method for the direct synthesis of an aqueous solution of hydrogen peroxyde from hydrogen and oxygen by hydrogenous catalysis in a three-phase system in which the hydrogen and oxygen are reacted directly in a gas state, at a pressure above atmospheric pre... | 09/05/1995 |
| 5391533 | Catalyst system for producing chlorine dioxide A catalyst contains at least one Group VIII metal and/or Group VIII metal oxide deposited on internal surfaces of a support which contains a sintered agglomerate substrate which is preferably coated with a hydrated metal oxide.... | 02/21/1995 |
| 5380691 | Catalytic microporous zirconia particulates Highly microporous zirconia particulates having pore sizes of an average diameter of less than 20 Å (2 nm), well adapted as catalysts and catalyst supports, are prepared by thermohydrolyzing a zirconium salt, separating the resulting precipitate from the... | 01/10/1995 |
| 5369076 | Vanadium catalysts and desulfurization of sulfur compound-containing gases therewith Particular mixed vanadium/other metal catalysts, well suited for the desulfurization of gaseous effluents containing contaminating amounts of objectionable sulfur compounds, typically via the Claus reaction and notably in the presence of oxygen, comprise ... | 11/29/1994 |
| 5278123 | Monolithic catalysts for converting sulfur compounds into SO2 Monolithic catalyst shaped articles adopted for the catalytic oxidation conversion of compounds of sulfur, e.g., HS, into sulfur dioxide, include a monolithic substrate containing a catalytically effective amount of at least one catalytically active eleme... | 01/11/1994 |
| 5254793 | Alkylation process and catalyst therefor A composition of matter, which is an effective alkylation catalyst composition, is prepared by a method comprising heating, at a temperature of about 40°-90° C., (a) aluminum chloride, (b) boron phosphate, (c) alumina and/or silica, and (d) at least one... | 10/19/1993 |
| 5252473 | Production of esters of lactic acid, esters of acrylic acid, lactic acid, and acrylic acid Processes are disclosed for producing lactic acid, esters of lactic acid, acrylic acid, and esters of acrylic acid, primarily from fermentable carbohydrate materials. An overall process for producing esters of acrylic acid comprises: a) fermenting carbohy... | 10/12/1993 |
| 5227356 | Catalyst containing metal oxides for use in the degenerative oxidation of organic compounds present in exhaust gases from combustion plants A metal oxide-containing catalyst which also contains, besides oxides of titanium and/or zirconium, oxides of vanadium and/or niobium and oxides of molybdenum, tungsten, and/or chromium, sulfates of alkaline earth metals, and which is used in a process fo... | 07/13/1993 |
| 5214017 | Solid-acid alkylation catalyst compositions for alkylation processes New catalyst compositions comprise sulfated and calcined mixtures of (1) a support comprising an oxide or hydroxide of a Group IV-A element, (2) an oxide or hydroxide of a Group VI, VII or VIII metal, (3) an oxide or hydroxide of a Group I-B, II-B, III-A,... | 05/25/1993 |
| 5212136 | Solid-acid alkylation catalyst compositions for alkylation processes New catalyst compositions comprise sulfated and calcined mixtures of (1) a support comprising an oxide or hydroxide of a Group IV-A element, (2) an oxide or hydroxide of molybdenum, and (3) an oxide or hydroxide of a Group I-B, II-B, III-A, III-B, IV-B, V... | 05/18/1993 |
| 5182247 | Sulfated catalyst for skeletal isomerization of olefins Normal olefins such as n-butene can be converted to branched species by skeletal isomerization over catalysts containing solid acids prepared by sulfating catalyst precursors containing hydrous metal oxides--e.g., aluminas, silica-aluminas or clays treate... | 01/26/1993 |
| 5137855 | Catalysts for selective catalytic reduction denox technology Catalysts for the selective catalytic reduction of NOx by ammonia are made from porous formed supports having a certain fraction of the pores with pore diameters larger than 600 Angstrom units. Thus macropores can be introduced in a formed TiO2... | 08/11/1992 |
| 5135901 | A catalyst composition comprising rhodium, ruthenium,and a promoter A catalyst used in a process for producing a ଲ-hydroxyester product or a ଲ-hydroxyaldehyde product from ethylene oxide, carbon monoxide, and, optionally, hydrogen, is disclosed. This process uses, as a catalyst, a catalyst comprising rhodium, ... | 08/04/1992 |
| 5128291 | Porous titania or zirconia spheres Porous titania or zirconia spheres having a particle diameter of about 1 to 100 microns, a pore volume of about 0.1 to 1 cc/g, and a pore diameter in the range of about 10 to 5,000 Angstrom units are made by spray drying a slurry of ultimate titania or zi... | 07/07/1992 |
| 5072024 | Synthesis of N-substituted amides by condensation of nitriles with certain organic hydroxyl compounds Disclosed is a method which comprises the reaction in a reaction zone of a nitrile, RCN, with a hydroxyl compound, R'OH, in the presence of an inorganic catalyst introduced into the reaction zone, thereby producing a reaction mixture containing at least o... | 12/10/1991 |
| 5039645 | Cement-containing catalyst composition and process for its preparation A solid composition is prepared by mixing water, a hydraulic cement, aluminum metal powder, and a catalyst composition comprising (a) an inorganic support, (b) Pt and/or Pd metal (c) and Fe metal and/or oxide, followed by maintaining the obtained mixture ... | 08/13/1991 |
| 5039646 | Cement-containing catalyst composition and process for its preparation A solid composition is prepared by mixing water, a hydraulic cement, sodium silicate, and a catalyst composition comprising (a) an inorganic support, (b) Pt and/or Pd metal and (c) Fe metal and/or oxide, followed by maintaining the obtained mixture under ... | 08/13/1991 |
