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| Number | Title | Issue Date |
| 5705731 | Reactivation of hydrocarbon isomerization catalysts In a process for isomerizing C4 -C7 alkanes and/or C6 -C7 cycloalkanes which is carried out in the presence of hydrogen gas, a chloride additive (e.g., CCl4 or C2 Cl4) and a supp... | 01/06/1998 |
| 5668074 | Preparation of catalysts for alkane/cycloalkane isomerization A material which is effective as a catalyst for isomerizing alkanes and/or cycloalkanes is prepared by a method which comprises incorporating Nb and/or Ta into a reduced material comprising Pt and/or Pd on alumina, followed by heating in a non-reducing ga... | 09/16/1997 |
| 5587348 | Alkyne hydrogenation catalyst and process A catalyst composition comprises palladium, at least one chemically bound alkali metal (preferably potassium), chemically bound fluorine and an inorganic support material (preferably alumina), wherein the atomic ratio of fluorine to alkali metals about 1.... | 12/24/1996 |
| 5583274 | Alkyne hydrogenation process C2 -C6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal f... | 12/10/1996 |
| 5574201 | Alkylation process The alkylation of C2 -C12 alkanes (preferably isobutane) with C2 -C12 alkenes (preferably butene-2), in the presence of trifluoromethanesulfonic acid on a solid inorganic material as catalyst, is carried out wit... | 11/12/1996 |
| 5557029 | Isomerization of saturated hydrocarbons In a process for isomerizing saturated C4- C10 hydrocarbons (preferably n-pentane) in the presence of a platinum/zeolite catalyst, wherein sulfur compounds are present in the feed as impurities and cause catalyst deactivating, at lea... | 09/17/1996 |
| 5543374 | Isomerization catalyst and use thereof in alkane/cycloalkane isomerization A catalyst composition is prepared by a method comprising impregnating alumina with at least one platinum compound, followed by calcining, reducing treatment, and heating with gaseous aluminum chloride and gaseous titanium tetrachloride. The thus-prepared... | 08/06/1996 |
| 5536692 | Isomerization catalyst and use thereof in isomerization of saturated hydrocarbons A catalyst composition is prepared by a method comprising impregnating alumina with at least one platinum compound, followed by treatment with at least one organoaluminum chloride (preferably ethylaluminum dichloride), titanium tetrachloride and at least ... | 07/16/1996 |
| 5510550 | Selective acetylene hydrogenation A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60° C.) with a liquid composition comprising an effective reducing agent (preferably an alkali me... | 04/23/1996 |
| 5489565 | Hydrogenation process and catalyst therefor A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C4 -C10 diolefi... | 02/06/1996 |
| 5489727 | Isopentane disproportionation The disproportionation of isopentane(s) in the presence of hydrogen fluoride as the catalyst is improved by adding at least one C6 -C18 (preferably C6 -C8) isoalkane to the isopentane feed.... | 02/06/1996 |
| 5488024 | Selective acetylene hydrogenation A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60° C.) with a liquid composition comprising an effective reducing agent (preferably an alkali me... | 01/30/1996 |
| 5474964 | Hydrocarbon isomerization catalyst and use thereof A catalyst composition is prepared by a method comprising impregnating alumina with at least one dissolved titanium compound (preferably a triethanolamine titanate) and at least one platinum compound, followed by treatment (at specific temperature conditi... | 12/12/1995 |
| 5475173 | Hydrogenation process and catalyst therefor A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C4 -C10 diolefi... | 12/12/1995 |
| 5470441 | Packed column vaporizer and vaporizing process An apparatus for vaporizing volatile liquids comprises a packed column, a gas inlet port (for introducing a hot entrainer gas), a feed tube (for introducing a volatile liquid), a feed distributor comprising a base plate equipped with orifices (through whi... | 11/28/1995 |
| 5463166 | Reactivation of alkane isomerization catalysts A process for reactivating a used n-alkane (preferably n-butane) isomerization catalyst comprising platinum, chlorine and a support material comprises contacting the catalyst with flowing hydrogen gas for at least about 1 hour at a temperature of below ab... | 10/31/1995 |
| 5461021 | Metal borate composition A novel composition comprises aluminum borate and zirconium borate. Preferably, the composition is prepared by coprecipitation. The composition is useful as a sorbent or as a catalyst material.... | 10/24/1995 |
| 5435904 | Injection of antifoulants into thermal cracking process streams A method of injecting a liquid tin-containing antifoulant into a saturated hydrocarbon feed stream for a thermal cracking reactor comprises providing a first open-ended tube, a second open-ended tube which concentrically surrounds the first tube, and a th... | 07/25/1995 |
| 5430220 | Platinum and tin-containing catalyst and use thereof in alkane dehydrogenation In a process for preparing a dehydrogenation catalyst of the type in which a support comprising zinc aluminate is impregnated with at least one of platinum and tin from an impregnation solution, the improvement comprises simultaneously impregnating the su... | 07/04/1995 |
| 5427689 | Separation of polar substances from hydrocarbons A process for separating polar substances (preferably water, alcohols, ethers, aldehydes, nitriles) from hydrocarbon fluids employs a sorbent comprising aluminum borate and zirconium borate. Preferably, the sorbent composition has been prepared by copreci... | 06/27/1995 |
| 5414184 | Alkane disproportionation C4 -C15 alkanes (preferably C4 -C8 alkanes) are disproportionated in the presence of at least one alkylaluminum chloride (preferably isobutylaluminum dichloride), at least one chloroalkane (preferably carbon tet... | 05/09/1995 |
| 5396022 | Defluorination of alkane streams An alkane/fluoroalkane feed is treated with an acidic alumina to reduce the amount of fluoroalkane(s) in the feed. In a particularly preferred embodiment, the feed is treated with a sulfur-containing alumina so as to convert a major portion of fluoroalkan... | 03/07/1995 |
| 5389233 | Metals passivation of cracking catalysts A zeolite-containing cracking catalyst is passivated with lithium sulfate and, preferably, at least one additional passivating agent (more preferably at least one antimony compound). The thus-passivated cracking catalyst is employed in a process for catal... | 02/14/1995 |
| 5387566 | Binding and shaping of cracking catalyst fines A process for converting catalytic cracking catalyst fines to a shaped composition comprises acid-treatment of catalytic cracking catalyst fines, followed by separation and drying of the acid-treated fines; preparing a shapable mixture by mixing the dried... | 02/07/1995 |
| 5378349 | Passivated catalysts for cracking process A zeolite-containing cracking catalyst is passivated with compounds of (a) antimony and (b) zirconium and/or tungsten. The thus-passivated cracking catalyst is employed in a process for catalytically cracking a hydrocarbon-containing oil feed. In another ... | 01/03/1995 |
| 5364976 | Alkylation/etherification process A process for simultaneously producing C5 -C12 alkane(s) and C5 -C8 tertiary alkyl ether(s) employs a liquid feed mixture containing (a) at least one C4 -C7 isoalkane, (b) at least one seco... | 11/15/1994 |
| 5360632 | Reduced leaching of arsenic and/or mercury from solid wastes Solid waste material which contains arsenic and/or mercury impurities is encapsulated in a cured polysulfide polymer so as to alleviate leaching of arsenic and/or mercury into aqueous liquids. Preferably, the solid waste material is first extracted with a... | 11/01/1994 |
| 5360779 | Preparation of supported sulfur compositions A solid combination of elemental sulfur and an inorganic support material (preferably alumina), is contacted with at least one liquid C5 -C12 alkane and/or cycloalkane, followed by substantially removing the C5 -C12 | 11/01/1994 |
| 5358919 | Preparation and use of isomerization catalysts Novel compositions, being effective as catalysts for alkane and/or cycloalkane isomerization, are prepared by a method which includes the steps of impregnating alumina with a sulfate of at least one metal selected from the group consisting of copper, iron... | 10/25/1994 |
| 5349116 | Alkane alkylation and catalyst therefor A composition of matter comprises trifluorometbanesulfonic acid and a solid inorganic material which contains aluminum borate and aluminum oxide, This composition is used as a catalyst for alkylating at least one C2 -C10 alkane (pref... | 09/20/1994 |
| 5344805 | Platinum and tin-containing catalyst and use thereof in alkane dehydrogenation In a process for preparing a dehydrogenation catalyst of the type in which a support comprising zinc aluminate is impregnated with at least one of platinum and tin from an impregnation solution, the improvement comprises simultaneously impregnating the su... | 09/06/1994 |
| 5306685 | Absorption of hydrogen sulfide and absorbent composition therefor Hydrogen sulfide is removed from a gas by contacting it with an absorbent composition consisting essentially of a mixed oxide of iron, zinc and nickel and an inorganic binder.... | 04/26/1994 |
| 5292988 | Preparation and use of isomerization catalysts Materials which have been prepared by a method which includes the steps of (1) impregnating alumina with a sulfate of at least one metal selected from the group consisting of copper, iron, cobalt, nickel, manganese, zinc and magnesium, (2) calcining the t... | 03/08/1994 |
| 5288685 | Alkylation process and catalyst therefor A composition of matter comprises trifluoromethanesulfonic acid on a solid support material which contains boron phosphate and/or boron sulfate. Preferred support materials are boron phosphate, boron phosphate-coated silica and boron sulfate-coated silica... | 02/22/1994 |
| 5284994 | Injection of antifoulants into thermal cracking reactors A liquid tin-containing antifoulant composition is injected into a metal-walled thermal cracking reactor tube, concurrently with the injection of a gaseous stream (preferably a steam-diluted C2 -C4 alkane stream), through a nozzle of... | 02/08/1994 |
| 5276242 | Alkylation process In one embodiment of this invention, a process for alkylating C3 -C6 alkanes (paraffins) with C3 -C6 alkenes (monoolefins) employs a catalyst composition which has been prepared by heating a mixture consisting e... | 01/04/1994 |
| 5269990 | Preparation of shaped zirconia particles Shaped zirconia particles are prepared by mixing zirconia powder with an aqueous colloidal zirconia solution or an aqueous acid solution so as to obtain a shapable mixture containing about 4-40 weight-% water, shaping this mixture, and heating the shaped ... | 12/14/1993 |
| 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 |
| 5254791 | Cycloalkane isomerization process C5 -C10 cycloalkanes (preferably methylcyclopentane) are isomerized in the presence of a catalyst comprising aluminum chloride and at least one of the following materials: boron phosphate on silica, boron phosphate on activated carbo... | 10/19/1993 |
| 5254790 | Integrated process for producing motor fuels An integrated process for converting C4 /C5 hydrocarbons contained in a gasoline feedstock to more valuable motor fuel components includes various distillation steps, a hydroisomerization step, an etherification step (for producing t... | 10/19/1993 |
