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| Number | Title | Issue Date |
| 6858129 | Tailored zeolite bound zeolite catalysts and its use for hydrocarbon conversion There is provided a zeolite bound zeolite catalyst which does not contain significant amount of non-zeolitic binder and can be tailored to optimize its performance and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The zeolite bo... | 02/22/2005 |
| 6831203 | Metal-containing zeolite catalyst, preparation thereof and use for hydrocarbon conversion There is provided a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The catalyst comprises first zeolite, crystals, a binder comp... | 12/14/2004 |
| 6793901 | Synthesis of molecular sieves having the CHA framework type The invention is directed to a method for preparing microporous aluminophosphate or silicoaluminophosphate molecular sieves having the CHA framework type, the process comprising the steps of a) forming a reaction mixture comprising a source of aluminum, a source of ... | 09/21/2004 |
| 6350428 | Preparation of zeolite-bound FAU structure type zeolite and use thereof This invention relates to a process for producing zeolite-bound FAU structure type zeolite having excellent mechanical strength and containing reduced amounts of zeolite P and the use of the zeolite-bound FAU structure type zeolites produced by the proces... | 02/26/2002 |
| 6258991 | Zeolites and processes for their manufacture Low temperature hydrothermal treatment of an LTL zeolite-producing mixture produces a colloidal suspension of the zeolite; the suspension may be used as seeds in Al- and Ga-LTL zeolite manufacture.... | 07/10/2001 |
| 6245219 | Naphtha aromatization process A process for reforming naphtha-containing hydrocarbon feedstreams is disclosed wherein a naphtha stream containing at least about 25 wt % of C5 to C9 aliphatic and cycloaliphatic hydrocarbons is contacted with a modified reforming c... | 06/12/2001 |
| 6198013 | Toluene disproportionation process using a zeolite bound zeolite catalyst There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, i... | 03/06/2001 |
| 6177373 | Procedure for preparing molecular sieve films The invention is comprised of a procedure for applying molecular sieve films to the surface of different substrates. This procedure is characterized in that microcrystals of the molecular sieves in question bind to the substrate surface in a first step as... | 01/23/2001 |
| 6160191 | Hydrocarbon conversion using large crystal zeolite catalyst A process for converting hydrocarbons by contacting a hydrocarbon feedstream under hydrocarbon conversion conditions with a large crystal zeolite catalyst. The large crystal zeolite of the catalyst used in the hydrocarbon conversion process is made by hea... | 12/12/2000 |
| 6150293 | Preparation of zeolite bound by MFI structure type zeolite and use thereof The preparation of zeolite bound zeolite comprising zeolite core crystals other than MFI structure zeolite which are bound by MFI structure type zeolite and the use of the zeolite bound by MFI structure type zeolite prepared by the process as an adsorbent... | 11/21/2000 |
| 6111157 | Aromatic conversion processes and zeolite bound zeolite catalyst useful therein A process is provided for the alkylation, transalkylation, or isomerization of aromatic hydrocarbons. The processes comprises contacting aromatic hydrocarbons under conversion conditions with a zeolite bound zeolite catalyst. The zeolite bound zeolite cat... | 08/29/2000 |
| 6090289 | Molecular sieves and processes for their manufacture Structures comprising an upper crystalline molecular sieve layer on a support, the crystals being at least partially oriented normal to the plane of the layer, there being a dense intermediate crystalline molecular sieve layer between the support and uppe... | 07/18/2000 |
| 6074457 | Molecular sieves and processes for their manufacture Structures comprising a crystalline molecular sieve layer on a substrate and an additional layer of a refractory material to occlude voids in the molecular sieve layer.... | 06/13/2000 |
| 6042808 | Zeolites and processes for their manufacture Low temperature hydrothermal treatment of an LTL zeolite-producing mixture produces a colloidal suspension of the zeolite; the suspension may be used as seeds in Al-- and Ga--LTL zeolite manufacture.... | 03/28/2000 |
| 6040259 | Metal-containing zeolite catalyst, preparation thereof and use for hydrocarbon conversion There is provided a zeolite bound zeolite catalyst which does not contain significant amounts of non-zeolitic binder and a process for converting hydrocarbons utilizing the zeolite bound zeolite catalyst. The catalyst comprises first zeolite, crystals, a ... | 03/21/2000 |
| 6039864 | Hydrocarbon conversion process using a zeolite bound zeolite catalyst There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, i... | 03/21/2000 |
| 6019956 | Zeolites and processes for their manufacture Colloidal Offretite, a process for its manufacture, and zeolite manufacture using it.... | 02/01/2000 |
| 6008425 | Process for isomerization of alkylaromatic hydrocarbons A process for isomerizating a feed containing alkylaromatic hydrocarbons, e.g., monocyclic alkylaromatic hydrocarbons and/or bicyclic alkylaromatic hydrocarbons. The process is carried out by contacting the feed under conversion conditions with a zeolite ... | 12/28/1999 |
| 5998686 | Process for producing aromatic compounds from aliphatic hydrocarbons A dehydrocyclo-oligomerization process is provided for converting aliphatic hydrocarbons to aromatics by contacting the feedstock under conversion conditions which a zeolite bound zeolite catalyst. The zeolite bound zeolite catalyst comprises first zeolit... | 12/07/1999 |
| 5993642 | Hydrocarbon conversion process using a zeolite bound zeolite catalyst There is provided a process for converting hydrocarbons which utilizes a zeolite bound zeolite catalyst that has enhanced performance when utilized in hydrocarbon conversion processes, e.g., catalytic cracking, alkylation, disproportionation of toluene, i... | 11/30/1999 |
| 5994603 | Methylation of toluene to para-xylene A process is provided for the production of paraxylene by the methylation of toluene in the presence of a zeolite bound zeolite catalyst. The catalyst comprises first zeolite crystals which are bound together by second zeolite crystals. When used to methy... | 11/30/1999 |
| 5980731 | Naphtha reforming catalyst and process The invention provides a crystalline type L zeolite reforming catalyst comprising cylindrically shaped crystals having a length of 0.6 microns or less and an average length: diameter ratio of less than about 0.5, the catalyst containing at least one Group... | 11/09/1999 |
| 5981817 | Xylene isomerization process A process for isomerizing a nonequilibrium xylene feed mixture is disclosed. The isomerization is conducted in the presence of hydrogen and at pressures in excess of 75 psig over a ZSM-5 type catalyst containing about 0.1 to 5 wt % of at least one metal s... | 11/09/1999 |
| 5972203 | Hydrocarbon conversion catalyst and its use There is provided catalysts and conversion processes for converting hydrocarbons using the catalysts. The catalysts comprises a first alumino-phosphospho-molecular sieves and a binder comprising a second alumino-phopho-molecular sieves. Exemplary conversi... | 10/26/1999 |
| 5958366 | Synthesis of large crystal zeolites Large crystal zeolites are prepared by heating a zeolite synthesis mixture under agitation to a temperature equal to or less than the effective nucleation temperature of the zeolite synthesis mixture and thereafter the zeolite synthesis mixture is heated ... | 09/28/1999 |
| 5919722 | Zeolite L catalyst Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to ... | 07/06/1999 |
| 5919721 | Microfiltration of zeolites Processes for washing zeolites, preferably less than about 0.5 micron in size, with a microfiltration system employing a washing liquid, such as an aqueous solution or water (preferably deionized water), to produce zeolite crystals having a zeolite pH in ... | 07/06/1999 |
| 5866495 | Method of regenerating deactivated catalysts A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with oxygen and water at elevated temperatures, contacting the c... | 02/02/1999 |
| 5863516 | Micro particles The present invention relates to colloidal suspensions of discrete particles of colloidal zeolite and a method for preparing such zeolite from clear tetraalkylammonium stabilized aluminiumsilicate solutions. Smaller amounts of well defined and controlled ... | 01/26/1999 |
| 5855863 | Zeolite L preparation Binderless particles of zeolite L of very high mechanical strength are prepared by a process which comprises forming a mixture by reacting substantially binderless particles of zeolite L, preferably as shaped particles such as extrudates, with an aqueous ... | 01/05/1999 |
| 5849177 | Process for reforming a dimethylbutane-free hydrocarbon fraction A process for reforming a hydrocarbon fraction substantially free of dimethylbutanes. The hydrocarbon is separated into a fraction comprising the C5 - hydrocarbons and the dimethylbutanes, a light fraction excluding dimethyl butanes, and a heav... | 12/15/1998 |
| 5849967 | Hydrocarbon conversion process using binderless zeolite L catalyst Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to ... | 12/15/1998 |
| 5783321 | ZSM-5 zeolite Crystalline tectosilicate ZSM-5 zeolite may be prepared which comprise substantially needle-shaped agglomerates. Tectosilicate ZSM-5 zeolite having a 29 Si NMR spectrum having at least three peaks indicates the presence of Si atoms in the struc... | 07/21/1998 |
| 5776849 | Regeneration of severely deactivated reforming catalysts The invention is directed a process for regenerating deactivated reforming catalysts comprising at least one Group VIII metal on zeolite L, preferably wherein the catalysts are extruded using a binder material such as alumina or silica. The process includ... | 07/07/1998 |
| 5773381 | Zeolite L preparation Zeolite L containing caesium is prepared by a process in which said zeolite L is crystallised from a synthesis mixture with a molar composition (expressed as oxides) of: ______________________________________ K2 O/SiO... | 06/30/1998 |
| 5763348 | Method of regenerating deactivated catalyst A deactivated reforming catalyst comprising a type L zeolite containing a Group VIII noble metal may be regenerated and have enhanced dispersion by a method involving contacting the catalyst with oxygen and water at elevated temperatures, contacting the c... | 06/09/1998 |
| 5756873 | Design for aromatics alkylation A method is provided for simply and effectively increasing monoalkylation of aromatic compounds while also increasing the life of the acid catalyst used to alkylate said compounds. The method and apparatus involve drastically reducing the amount of the al... | 05/26/1998 |
| 5756064 | Siliceous offretite Zeolite crystals having an offretite structure have smaller crystals and/or can be produced using a synthesis mixture of lower alkalinity than could otherwise be used, if a divalent metal cation, such as magnesium, barium or cobalt is included in the synt... | 05/26/1998 |
| 5756414 | Method of regenerating deactivated catalyst The present invention is a process for regenerating deactivated catalyst or redispersing catalytic metal in a fresh catalyst comprising at least one Group VIII catalytic metal, zeolite, an inert binder. The process comprises coke burn, hydrogen reduction,... | 05/26/1998 |
| 5753121 | Inorganic composite membrane comprising molecular sieve crystals Inorganic composite membrane containing molecular sieve crystals, comprising a macroporous support to which molecular sieve crystals and modifications thereof have been applied substantially as a monolayer, said crystals and modifications thereof having b... | 05/19/1998 |
