Using Metal Oxide Catalyst Patents (Class 585/640)
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Patent number: 5625109Abstract: A tertiary butyl alcohol feed is continuously dehydrated in the liquid phase, in a boiling reactor, a vapor mixture of isobutylene, water, tertiary butyl alcohol and isobutanol and/or secondary butanol is removed and cooled, isobutylene is recovered and the remaining product mixture is phase separated into an upper organic-rich phase which is recycled to dehydration and a lower aqueous phase which is purged.Type: GrantFiled: November 21, 1994Date of Patent: April 29, 1997Inventor: Vijai P. Gupta
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Patent number: 5578195Abstract: Synthetic crystalline aluminosilicate of the pentasil type and method for using the same as catalysts or catalyst components in petrochemical processes for the catalytic conversion of hydrocarbons and their derivatives into useful organic compounds and intermediates.Type: GrantFiled: April 13, 1995Date of Patent: November 26, 1996Assignee: Ecolith - Zeolithe GmbHInventors: Arno Tissler, Roland Thome, Karl Becker, Hans-Dieter Neubauer, Hans-Heino John
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Patent number: 5567860Abstract: A process for the production of R.sub.2 -isoolefins by decomposition of R.sub.1 --O-tertiary-R.sub.2 is disclosed. R.sub.1 --O-secondary-R.sub.2 that are normally present in the feed stream are selectively removed. Removal of these R.sub.1 --O-secondary-R.sub.2 lowers the R.sub.2 -normal olefin impurity and increases the yield of the product R.sub.2 -isoolefins.Type: GrantFiled: October 4, 1994Date of Patent: October 22, 1996Assignee: UOPInventors: John R. Mowry, Jacqueline A. Harris, Charles P. Luebke, David A. Hamm
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Patent number: 5550309Abstract: A process for the dehydrogenation of a hydrocarbon and/or oxygenated hydrocarbon feed, which process comprises the steps of(a) sequentially contacting the feed with a catalyst bed in a reaction chamber at elevated temperature, said catalyst bed comprising a first catalyst which is a dehydrogenation catalyst to produce a dehydrogenated product and hydrogen and a second catalyst capable of adsorbing and/or reacting with at least some of said hydrogen, said second catalyst having a porous coating.(b) removing the dehydrogenated product and any hydrogen which has not been adsorbed or reacted from the reaction chamber;(c) removing at least some of the adsorbed/reacted hydrogen from the coated catalyst and/or oxidising at least some of the reduced coated catalyst, thereby regenerating the second catalyst;(d) using said regenerated second catalyst in step (a).Type: GrantFiled: October 31, 1994Date of Patent: August 27, 1996Assignee: BP Chemicals LimitedInventors: Barry M. Maunders, Stephen R. Partington
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Patent number: 5545791Abstract: A catalyst for the conversion of lower aliphatic alcohols such as methanol to form petroleum type hydrocarbons comprises one or more metals and/or metal ions supported on a phosphate carrier. Preferred metals include transition metals such as Ti, Ni, Cu, Zn, Rh, Ag, Ir and alkali metals, alkaline earth metals, Al and Sn. The phosphate carrier is preferably aluminium phosphate, zirconyl phosphate, magnesium phosphate, barium phosphate, zinc phosphate or a calcium phosphate compound. The metal should amount to 0.1 to 30% by weight with respect to the phosphate carrier. This catalyst is used to convert lower aliphatic alcohols to produce the gasoline type hydrocarbons at a reaction temperature of 200.degree. to 600.degree. C. and a supply rate of 0.75 to 3.0 weight units of alcohol per weight unit of catalyst per hour.Type: GrantFiled: April 15, 1994Date of Patent: August 13, 1996Assignee: Kabushiki Kaisha SangiInventors: Shuji Sakuma, Kiminori Atsumi, Akira Inose, Hideo Koyama
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Patent number: 5523509Abstract: Synthetic manganese oxide octahedral molecular sieves, e.g., OMS-1 and OMS-2, are employed as acid-base catalysts in a variety of acid-base organic conversion reactions.Type: GrantFiled: November 7, 1994Date of Patent: June 4, 1996Assignee: Texaco Inc.Inventors: Chi-Lin O'Young, Robert A. Sawicki, Yan-Fei Shen, Steven L. Suib
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Patent number: 5475178Abstract: There is provided a catalyst comprising a heteropoly acid, such as phosphotungstic acid, supported on a mesoporous crystalline material, such as M41S. A particular form of this M41S support is designated as MCM-41. There is also provided a method for preparing this catalyst by impregnating the heteropoly acid on the support. There is also provided a process for using this catalyst to catalyze acid catalyzed reactions, such as the isomerization of paraffins and the alkylation of aromatics.Type: GrantFiled: August 18, 1994Date of Patent: December 12, 1995Assignee: Mobil Oil Corp.Inventors: Kenneth J. Del Rossi, Gregory A. Jablonski, Charles T. Kresge, Guenter H. Kuehl, David O. Marler, Gayatri S. Rav, Brenda H. Rose
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Patent number: 5475183Abstract: A process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms which comprises using a .gamma.-alumina catalyst containing 0.3% by weight or less of impurities in total excluding SiO.sub.2, the impurities including 0.2% by weight or less of sulfur content calculated in terms of SO.sub.4 - and 0.05% by weight or less of sodium content calculated in terms of Na.sub.2 O, and/or a process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms that comprises using a .gamma.-alumina catalyst which contains 0.5 to 5% by weight of SiO.sub.2.According to the process of the present invention, lower olefins can be produced from lower alcohols with high yield and high selectivity for a prolonged period of time without reducing the catalytic activity.Type: GrantFiled: December 3, 1993Date of Patent: December 12, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shintaro Araki, Katsuo Taniguchi, Toshiyuki Isaka
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Patent number: 5475182Abstract: A method for enhancing ethylene yield in the conversion of oxygenates to olefins that involves extracting molecular sieve catalysts, such as silicoaluminophosphate catalysts, with a mineral acid is provided. Acid extraction is thought to alter the crystallinity of the molecular sieve catalyst and thereby improve ethylene yield.Type: GrantFiled: July 27, 1993Date of Patent: December 12, 1995Assignee: Exxon Chemical Patents Inc.Inventor: Marcel J. G. Janssen
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Patent number: 5463157Abstract: A method for producing 3-methyl-2-pentene which is substantially free of any other C.sub.6 olefin, except 2-ethyl-1-butene, by first producing a stream that contains 2-ethyl-1-butene from the trimerization of ethylene, and second by recovering the 2-ethyl-1-butene as 3-methyl-2-pentene via etherification, separation of the ether, and decomposition of the ether back to predominantly 3-methyl-2-pentene with some 2-ethyl-1-butene.Type: GrantFiled: October 29, 1993Date of Patent: October 31, 1995Assignee: Exxon Chemical Patents, Inc.Inventors: Dan E. Hendriksen, Gerald G. McGlamery, Michael J. Keenan, Derrick D. Pete
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Patent number: 5436382Abstract: The present invention provides a process for producing isobutylene from a tertiary butyl alcohol purge stream comprised of tertiary butyl alcohol, water and light organics by a hydrocarbon solvent extraction of tertiary butyl alcohol, stripping of the extracted tertiary butyl alcohol from the solvent and dehydration of the stripped tertiary butyl alcohol to form isobutylene.Type: GrantFiled: November 15, 1994Date of Patent: July 25, 1995Assignee: Arco Chemical Technology, L.P.Inventor: Vijai P. Gupta
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Patent number: 5397454Abstract: A crystalline zeolite SSZ-32 of novel composition is prepared using an N-lower alkyl-N'-isopropyl-imidazolium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-32.Type: GrantFiled: February 28, 1994Date of Patent: March 14, 1995Assignee: Chevron U.S.A. Inc.Inventors: Stacey I. Zones, James N. Ziemer, Donald S. Santilli, Robert A. Innes, Dennis L. Holtermann
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Patent number: 5382740Abstract: A process for the continuous production of cyclohexene from a cyclohexyl ester of a carboxylic acid having 1 or 2 carbon atoms, which comprises the following steps:a) heating a cyclohexyl ester of a carboxylic acid having 1 or 2 carbon atoms in the presence of an acid catalyst with the formation of cyclohexene and a carboxylic acid having 1 or 2 carbon atoms;b) removing, by distillation, cyclohexene and carboxylic acid having 1 or 2 carbon atoms from the reaction mixture from stage a) at the same rate as they are formed;c) adding a cyclohexyl ester of a carboxylic acid having 1 or 2 carbon atoms to stage a) at the rate cyclohexene and carboxylic acid are distilled off; andd) separating the mixture comprising cyclohexene and carboxylic acid having 1 or 2 carbon atoms coming from stage b).Type: GrantFiled: December 18, 1992Date of Patent: January 17, 1995Assignee: BASF AktiengesellschaftInventors: Rolf Pinkos, Rolf Fischer, Roman Dostalek
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Patent number: 5367100Abstract: A zeolite catalyst from ZSM-5 modified with phosphorus, rare earth elements and pore structure regulator is used for methanol/dimethyl ether conversion to light olefins.High temperature, non-recycling, continuous-running process is realized in the reactor system, comprising a dehydration reactor and several (2-n) adiabatic, fixed bed cracking reactors, loaded with the catalyst in multi-stage packing and operated in reaction regeneration cycles. The catalyst possesses high activity, high selectivity, good hydrothermal stability and long reaction life time.Operation of 100% methanol conversion and >85% C.sub.2 -C.sub.4 selectivity has been performed in a reactor system of the scale 0.7-1 ton CH.sub.3 OH/day for >600 hours on stream and with reaction time of single cycle >24 hours.Type: GrantFiled: April 29, 1993Date of Patent: November 22, 1994Assignee: Dalian Institute of Chemical PhysicsInventors: Wang Gongwei, Ying Muliang, Wang Xingchun, Chen Guoquan
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Patent number: 5349113Abstract: A process for a shape selective hydrocarbon conversion such as toluene disproportionation involves contacting a reaction stream under conversion conditions with a catalytic molecular sieve which has been pre-selectivated and concurrently activated by contact with a substantially aqueous solution of an organosilicon compound. The invention also includes a method for concurrently preselectivating and activating a catalyst and the shape selectivated, activated catalyst which results from this method.Type: GrantFiled: February 25, 1993Date of Patent: September 20, 1994Assignee: Mobil Oil Corp.Inventors: Clarence D. Chang, Paul G. Rodewald
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Patent number: 5349114Abstract: A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedsteam under conversion conditions with a modified catalytic molecular sieve which has been modified by being pre-selectivated with a first silicon source, then steamed. The feedstream may also contain a second silicon source which is a high efficiency para-xylene selectivating agent. The method for modifying the molecular sieve is also described.Type: GrantFiled: April 5, 1993Date of Patent: September 20, 1994Assignee: Mobil Oil Corp.Inventors: Rudolph M. Lago, David O. Marler, Sharon B. McCullen
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Patent number: 5302775Abstract: Process for the catalytic conversion of a charge incorporating at least one oxygen compound such as methanol, into olefinic hydrocarbons having 2 to 4 carbon atoms. Conversion takes place in a reactor (100), into which the charge is introduced by the pipe (20), the catalytic solid by the pipe (30) and the solid entrainment gas by the pipe (40), the reactor being connected by a pipe (1) to a co-current cyclone separator (S) making it possible to separate a solid phase from a gaseous phase containing the conversion products, which is recovered by the pipe (4). The solid phase is fed by the pipe (9) to a regenerator (R), in which the catalytic particles are at least partly regenerated before being returned by the pipe (80), connected to the pipe (30), to the reactor (100).Type: GrantFiled: February 7, 1992Date of Patent: April 12, 1994Assignee: Institut Francais du PetroleInventors: Francois Hugues, Daniel Vuillemot, Jean Pierre Burzynski, Pierre Galtier, Thierry Gauthier
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Patent number: 5300210Abstract: A crystalline zeolite SSZ-32 of novel composition is prepared using an N-lower alkyl-N'-isopropyl-imidazolium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-32.Type: GrantFiled: June 7, 1993Date of Patent: April 5, 1994Assignee: Chevron Research and Technology CompanyInventors: Stacey I. Zones, James N. Ziemer, Donald S. Santilli, Robert A. Innes, Dennis L. Holtermann
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Patent number: 5278345Abstract: A process for converting an oxygenate feed to light olefins using a microporous zeolite catalysts such as ECR-1, mazmorites, and/or ECR-18 is provided. In a preferred embodiment, the process is conducted at approximately 440.degree. C. (824.degree. F.) to about 460.degree. C. (860.degree. F.) using a methanol:water (approximately 1:4 molar ratio) feed and results in superior production of light olefins.Type: GrantFiled: May 27, 1992Date of Patent: January 11, 1994Assignee: Exxon Chemical Patents Inc.Inventors: Marcel J. G. Janssen, David E. W. Vaughan
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Patent number: 5264645Abstract: The conversion of a charge comprising at least one oxygen compound is performed in a reactor C, into which the charge is introduced by the pipe (11), the solid catalytic particles forming the dense phase D1 by the pipe (14) and the solid entrainment gas by the pipe (12). The reactor is connected by a pipe (1) to a cocurrent cyclone separator-mixer (MS) making it possible to separate a solid phase from a gaseous phase containing the conversion products recovered by the pipe (4'), while carrying out a quenching of said gaseous phase by a product M2 introduced by the pipe (3). The phase D1 is fed by the pipe (7) to a regenerator R before being returned by the pipe (13) into the reactor C. The mixture of the gaseous phase and the product M2 is separated in a separator and the product M2, optionally after cooling, is recycled to the mixer-separator (MS).Type: GrantFiled: March 9, 1992Date of Patent: November 23, 1993Assignee: Institut Francais du PetroleInventors: Francois Hugues, Jean P. Burzynski, Daniel Vuillemot, Pierre Galtier, Thierry Gauthier
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Patent number: 5254785Abstract: The present invention provides a process for cracking or decomposing a feedstream containing a major proportion of at least one dialkyl ether to produce the corresponding olefins comprising contacting the feedstream with a faujasite aluminosilicate catalyst which is characterized in that at least about 50 wt. % of the alkali metal content originally present in said faujasite has been exchanged by at least one alkaline earth metal. The decomposition is preferably conducted in the vapor phase at preferred temperatures in the range of from about 125.degree. F. to about 600.degree. F. The process offers the advantages of longer catalyst life coupled with high yield and selectivity rates towards olefin production.Type: GrantFiled: June 9, 1992Date of Patent: October 19, 1993Assignee: Exxon Chemical Patents Inc.Inventors: David D. Rosenfeld, Derrick D. Pete, Larry L. Iaccino, Barrington M. Hammond
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Patent number: 5254767Abstract: A new zeolite, designated ZSM-22, is disclosed and claimed. The new zeolite has the composition, in the anhydrous state, expressed in terms of mole ratios of oxides as follows:(x)Q.sub.2 O:(y)M.sub.2/n O:(z)L.sub.2 O.sub.3 :100SiO.sub.2wherein Q.sub.2 O is the oxide form of an organic compound containing an element of Group 5-B (as defined in the Table of the Elements--National Bureau of Standards, Fischer Scientific Co. Catalog No. 5-702-10), e.g., N or P, preferably N, containing at least one alkyl or aryl group having at least 2 carbon atoms, M is an alkali or alkaline earth metal having a valence n, e.g., Na, K, Cs or Li and wherein x=0.01-2.0, y=0-2.0, z=0-5, and L=Al. The zeolite is useful in the process of catalytic conversion of alcohols and/or oxygenates to gasoline-grade hydrocarbons.Type: GrantFiled: June 22, 1984Date of Patent: October 19, 1993Assignee: Mobil Oil Corp.Inventor: Francis G. Dwyer
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Patent number: 5233117Abstract: Hydrothermal treatment of silicoaluminophosphate molecular-sieves at temperatures in excess of about 700.degree. C. for periods sufficient to destroy a large proportion of their acid sites while retaining at least 80 percent of their crystallinity is found to result in a catalyst for converting methanol to lower olefins having increased catalyst life, increased selectivity for C.sub.2 -C.sub.3 olefins and decreased selectivity for paraffin production than the untreated SAPO-n starting composition.Type: GrantFiled: May 4, 1992Date of Patent: August 3, 1993Assignee: UOPInventor: Paul T. Barger
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Patent number: 5227563Abstract: Propylene can be prepared in high yield and selectivity by dehydrating isopropanol in the presence of a .gamma.-alumina catalyst having a mean pore diameter of from 30 to 150 .ANG. with a standard deviation (.sigma..sub.n) of from 10 to 40 .ANG. based on statistic calculation from pore diameter and pore volume.Type: GrantFiled: May 9, 1991Date of Patent: July 13, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiroshi Fukuhara, Fujihisa Matsunaga, Mitsuki Yasuhara, Shintaro Araki, Toshiyuki Isaka
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Patent number: 5227564Abstract: A process for the preparation of tertiary olefins by decomposition of a tertiary alkyl ether in the vapor phase in the presence of a catalyst, wherein the catalyst used is a composition of: (i) 5 to 95 percent by weight of a crystalline aluminosilicate zeolite having a silica-to-alumina mole ratio of at least about 5 and a Constraint Index of about 1 to about 12, and (ii) 95 to 5 percent by weight of a binder selected from amorphous silica, alumina, silica-alumina and mixtures thereof.Type: GrantFiled: December 9, 1991Date of Patent: July 13, 1993Assignee: Dairen Chemical CorporationInventors: S. C. Chen, C. C. Chu, F. S. Lin, Liang Sheu, Shing Y. Wang
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Patent number: 5223464Abstract: A process for regenerating a catalyst which involves washing a catalyst with a liquid at a temperature within the range of about 50.degree. C. to about 70.degree. C. for a time sufficient to remove foulants thereby recovering catalyst activity. The wash liquid is preferably a member selected from the group consisting of ethers, alcohols and mixtures of ethers and alcohols wherein the ether is a tertiary alkyl ether, preferably selected from the group consisting of tertiary amyl methyl ether and methyl tertiary butyl ether, and wherein the alcohol is preferably selected from the group consisting of tertiary butyl alcohol and methanol. The catalyst is preferably a clay treated with an acid selected from the group consisting of hydrofluoric acid, hydrochloric acid and mixtures of hydrofluoric and hydrochloric acid, wherein the clay is preferably selected from the group consisting of montmorillonite, kaolinite, attapulgite, bentoninte and natural clay.Type: GrantFiled: April 10, 1991Date of Patent: June 29, 1993Assignee: Exxon Chemical Patents Inc.Inventors: Robert C. Michaelson, Gustavo Cerri
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Patent number: 5215648Abstract: Hydrocarbon conversion processes using a crystalline zeolite SSZ-31.Type: GrantFiled: January 3, 1992Date of Patent: June 1, 1993Assignee: Chevron Research and Technology CompanyInventors: Stacey I. Zones, Thomas V. Harris, Andrew Rainis, Donald S. Santilli
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Patent number: 5210363Abstract: Disclosed is a hydrous zirconium oxide catalyst for the dehydration of alcohols of the general formula ##STR1## to terminal olefins, as well as a method for preparing said catalyst. The catalyst provides high conversion of alcohol to olefin, high dehydration selectivity, and high selectivity for terminal olefin.Type: GrantFiled: March 17, 1992Date of Patent: May 11, 1993Assignee: Chevron Research and Technology CompanyInventor: William A. Sweeney
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Patent number: 5210364Abstract: A process for the production of olefins which comprises passing an oxygenate-containing feedstock over a zeo type catalyst at a temperature greater than 200.degree. C. characterized in that the oxygenate-containing feedstock comprises C.sub.3 and/or C.sub.4 olefins and as oxygenate methanol formaldehyde and/or dimethylether, the molar ratio of olefin to oxygenate being greater than 1:20 and the zeo type catalyst being of TON-type structure.Type: GrantFiled: November 7, 1991Date of Patent: May 11, 1993Assignee: The British Petroleum Co., p.l.c.Inventors: Sami A. I. Barri, David A. Kidd
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Patent number: 5210207Abstract: The invention provides an improved process for the preparation of a vinyl derivative of a Bronsted acid, wherein a vinyl derivative of a first Bronsted acid is subjected to transvinylation by reactive distillation with a second Bronsted acid.Type: GrantFiled: January 31, 1991Date of Patent: May 11, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Morteza Mokhtarzadeh, Rex E. Murray
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Patent number: 5202014Abstract: A crystalline zeolite SSZ-25 is prepared using an adamantane quaternary ammonium ion as a template.Type: GrantFiled: November 6, 1991Date of Patent: April 13, 1993Assignee: Chevron Research and Technology CompanyInventors: Stacey I. Zones, Dennis L. Holtermann, Robert A. Innes, Theresa A. Pecoraro, Donald S. Santilli, James N. Ziemer
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Patent number: 5196633Abstract: A process is provided for effecting catalytic conversion of an organic compound-containing feedstock to conversion product which comprises contacting said feedstock under catalytic conversion conditions with a catalyst comprising an active form of an inorganic, porous crystalline phase exhibiting, after calcination, a hexagonal arrangement of uniformly-sized pores having diameters of at least about 13, e.g., at least about 15, Angstrom Units and exhibiting a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 Angstrom Units.Type: GrantFiled: March 18, 1992Date of Patent: March 23, 1993Assignee: Mobil Oil Corp.Inventors: Charles T. Kresge, Michael E. Leonowicz, Wieslaw J. Roth, James C. Vartuli
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Patent number: 5191141Abstract: This invention relates to an improved process for converting methanol to light olefins using an ELAPO catalyst. The catalyst comprises a metal aluminophosphate molecular sieve having the empirical formula (EL.sub.x Al.sub.y P.sub.z)O.sub.2 where EL is a metal and x,y and z are mole fractions of EL, Al and P respectively. Preferred metals are silicon, magnesium and cobalt, with silicon especially preferred. The molecular sieve catalyst is composed of particles at least 50% of which have a particle size less than 1.0 .mu.m and no more than 10% of the particles have a particle size greater than 2.0 .mu.m. It is also preferred that the metal content (x) be from about 0.005 and 0.05 mole fraction.Type: GrantFiled: April 1, 1992Date of Patent: March 2, 1993Assignee: UOPInventors: Paul T. Barger, Stephen T. Wilson, Jennifer S. Holmgren
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Patent number: 5191137Abstract: There is provided a molecular sieve coated with a non-oxide ceramic. The molecular sieve may be a zeolite, such as ZSM-5, and the ceramic coating may be, e.g., boron nitride. The coated molecular sieve may be prepared by contacting the molecular sieve with a ceramic precursor material comprising a thermally decomposable material, such as polyborazylene, and thermally decomposing this thermally decomposable material. The coated molecular sieves may be used as organic conversion catalysts. The non-oxide ceramic coating may alter or enhance the shape-selective properties of the molecular sieve by providing a diffusion barrier to molecules.Type: GrantFiled: April 27, 1992Date of Patent: March 2, 1993Assignee: Mobil Oil Corp.Inventor: Jeffrey S. Beck
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Patent number: 5191142Abstract: A process for efficiently converting methanol to C.sub.3 -C.sub.12 olefins or paraffinic gasoline components is disclosed. A gaseous reaction mixture containing methanol and olefins is contacted with a solid acid catalyst in a reaction zone under conditions whereby a positive methanol concentration is maintained throughout the reaction zone. The process provides extended catalyst life, reduced deactivation rates, improved yields, and enhanced selectively for valuable products.Type: GrantFiled: December 23, 1991Date of Patent: March 2, 1993Assignee: Amoco CorporationInventors: Christopher L. Marshall, Jeffery T. Miller
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Patent number: 5191143Abstract: A method for the preparation of isobutylene substantially free from tertiary butyl formate and peroxides from a tertiary butyl alcohol feedstock contaminated with tertiary butyl formate and peroxides wherein the feedstock is continuously brought into contact with a bed of a catalyst consisting essentially of sulfuric acid impregnated alumina under reaction conditions including a temperature of about 150.degree. to about 400.degree. C. and a pressure of about 0 to about 3000 psig. at the rate of about 0.5 to about 10 g of feedstock per hour per cc of catalyst, to form a reaction product substantially completely free from tertiary butyl formate and peroxides.Type: GrantFiled: January 10, 1992Date of Patent: March 2, 1993Assignee: Texaco Chemical CompanyInventors: Wei-Yang Su, William A. Smith, Roya Tooloian
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Patent number: 5178748Abstract: A catalyst comprising a novel zeolite NU-87, is useful in a wide variety of hydrocarbon conversion reactions including isomerisation, transalkylation and alkylation.Type: GrantFiled: June 13, 1991Date of Patent: January 12, 1993Assignee: Imperial Chemical IndustriesInventors: John L. Casci, Ivan J. S. Lake, Timothy R. Maberly
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Patent number: 5177279Abstract: An integrated process for the conversion of methanol feed to gasoline and distillate range liquid hydrocarbons comprising the steps of splitting the methanol feed into two portions, contacting the first portion of the methanol feed with a medium-pore shape selective zeolite catalyst in a first reaction zone at elevated temperature and moderate pressure to convert the first portion of the methanol feed to hydrocarbons comprising C.sub.2 + olefins; cooling and separating effluent from the first reaction zone to recover a C.sub.3 + olefin hydrocarbon stream and a C.sub.2 - light gas stream; pressurizing the C.sub.3 + olefin hydrocarbon stream and the second portion of the methanol feed and contacting the C.sub.3 + hydrocarbon stream and the methanol feed in a second reaction zone with a medium-pore shape selective oligomerization zeolite catalyst at substantially increased pressure and moderate temperature to convert at least a portion of the C.sub.Type: GrantFiled: October 1, 1991Date of Patent: January 5, 1993Assignee: Mobil Oil CorporationInventor: Mohsen N. Harandi
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Patent number: 5174888Abstract: A process is provided for effecting catalytic conversion of an organic compound-containing feedstock to conversion product which comprises contacting said feedstock under catalytic conversion conditions with a catalyst comprising an active form of an inorganic, non-pillared crystalline phase exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a position greater than about 18 Angstrom Units d-spacing with a relative intensity of 100, and a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams crystal at 50 torr and 25.degree. C.Type: GrantFiled: October 28, 1991Date of Patent: December 29, 1992Assignee: Mobil Oil Corp.Inventors: Charles T. Kresge, Michael E. Leonowicz, Wieslaw J. Roth, James C. Vartuli
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Patent number: 5171920Abstract: A process for obtaining a tertiary olefin, e.g. isobutylene in a very pure state by decomposing the corresponding ether, e.g. methyl tert. butyl ether, in the presence of a catalyst constituted by silica, modified by the addition of at least one element or compound of an element preferably chosen from the group constituted by rubidium, cesium, magnesium, calcium, strontium, barium, gallium, lanthanum, cerium, praseodymium, neodymium and uranium and optionally by the addition of at least one element or compound of an element chosen from the group constituted by aluminium, titanium and zirconium.Type: GrantFiled: April 9, 1991Date of Patent: December 15, 1992Assignee: Institut Francais du PetroleInventors: Patrick Chaumette, Germain Martino, Catherine Verdon, Serge Leporq
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Patent number: 5157181Abstract: Moving bed hydrocarbon conversion processes are disclosed wherein a carbonaceous material is deposited on a solid catalyst used in the conversion process to form a coked catalyst which is regenerated in a regeneration zone in order to remove the carbonaceous deposit material from the catalyst and provide a regenerated catalyst having an increased number of active catalyst sites relative to the coked catalyst. The regenerated catalyst is then added to the reaction zone at a rate effective to enhance the conversion to desired products without enhancing the conversion to undesired by-products. When a radial flow reaction zone is employed a relatively constant amount of active catalyst sites can be maintained through the reaction zone by increasing the thickness of annulus through which the catalyst flows in the lower section of the reaction zone wherein the catalyst is more severely coked and has fewer active catalyst sites.Type: GrantFiled: December 3, 1990Date of Patent: October 20, 1992Assignee: UOPInventors: Laurence O. Stine, Howard E. Fullerton, Thomas R. Fritsch, Paul T. Barger
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Patent number: 5157193Abstract: Controlled ratios of ethylene to propylene are obtained in almost quantitative yields from catalytic dehydration of methanol when selected molecular sieve zeolites are used as catalysts and the methanol starting material is diluted with varying amounts of steam or inert gas.Type: GrantFiled: January 15, 1991Date of Patent: October 20, 1992Assignee: Energia Andina Ltd.Inventor: Jorge P. Miller
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Patent number: 5157192Abstract: A process for the conversion of tertiary alcohols to C.sub.8 + olefin products over a zeolite catalyst, such as zeolite Beta. The process is particularly useful for the conversion of t-butyl alcohol to 2,2,4-trimethyl pentene. A two-step partial oxidation/dimerization process to yield C.sub.8 + olefin products is also disclosed.Type: GrantFiled: November 12, 1991Date of Patent: October 20, 1992Assignee: Mobil Oil CorporationInventor: Charles M. Sorensen
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Patent number: 5151393Abstract: The invention comprises the discovery has been made that the reactivation of spent medium pore, shape selective metallosilicate catalyst particles can be enhanced by carrying out the removal of deactivating coke and carbonaceous deposits on the surface and within the pores of the catalyst using hydrogen in a two stage process. The first stage consists of reactivation with hydrogen at elevated temperature and relatively high pressure to crack, strip and remove the more volatile deactivating coke and carbonaceous components on the catalyst surface. The second stage of the reactivation process is carried out at low pressure and elevated temperature, leading to the stripping of the deactivating carbonaceous residue of low volatility on the catalyst surface and pores. The effect of the two stage regeneration process is to improve the removal of coke and carbonaceous materials from the catalyst surface, pores and voids providing a more effective reactivated catalyst.Type: GrantFiled: April 23, 1991Date of Patent: September 29, 1992Assignee: Mobil Oil CorporationInventors: Mohsen N. Harandi, Hartley Owen
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Patent number: 5146032Abstract: An integrated process comprising the steps of pressurizing a C.sub.3.sup.+ olefin hydrocarbon stream and a methanol feed and contacting the C.sub.3.sup.+ hydrocarbon stream and methanol feed in a first reaction zone with a medium-pore shape selective oligomerization zeolite catalyst at elevated pressure and moderate temperature to convert at least a portion of the C.sub.3.sup.+ hydrocarbons and methanol feed to heavier liquid hydrocarbon product stream comprising olefinic gasoline and distillate range liquids. An ethene stream and a stream containing unreacted methanol and water are recovered from the first reaction zone effluent and the methanol is separated from the water.The ethene and the separated unreacted methanol are contacted with a medium-pore shape selective zeolite catalyst in a second reaction zone at elevated temperature and moderate pressure to convert the methanol feed to hydrocarbons comprising C.sub.3.sup.+ olefins and cooling effluent from the second reaction zone to recover a C.sub.3.sup.Type: GrantFiled: December 12, 1991Date of Patent: September 8, 1992Assignee: Mobil Oil CorporationInventor: Mohsen N. Harandi
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Patent number: 5126308Abstract: This invention relates to an improved process for converting methanol to light olefins and to a catalyst for carrying out the process. The catalyst comprises a metal aluminophosphate molecular sieve having the empirical formula (EL.sub.x Al.sub.y P.sub.z)O.sub.2 where EL is a metal and x, y and z are mole fractions of EL, Al and P respectively. Preferred metals are silicon, magnesium and cobalt, with silicon especially preferred. The molecular sieve catalyst is composed of particles at least 50% of which have a particle size less than 1.0 .mu.m and no more than 10% of the particles have a particle size greater than 2.0 .mu.m. It is also preferred that the metal content (x) be from about 0.005 and 0.05 mole fraction.Type: GrantFiled: November 13, 1991Date of Patent: June 30, 1992Assignee: UOPInventors: Paul T. Barger, Stephen T. Wilson, Jennifer S. Holmgren
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Patent number: 5107001Abstract: Present invention relates to the production of propylene oxide by reaction of propylene with a C.sub.4 or higher hydroperoxide wherein at least a portion of the propylene is derived from the hydroperoxide moiety.Type: GrantFiled: September 7, 1990Date of Patent: April 21, 1992Assignee: Arco Chemical Technology, L.P.Inventors: Morris Gelb, David W. Leyshon, John A. Sofranko, C. Andrew Jones
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Patent number: 5095163Abstract: Hydrothermal treatment of silicoaluminophosphate molecular sieves at temperatures in excess of about 700.degree. C. for periods sufficient to destroy a large proportion of their acid sites while retaining at least 80 percent of their crystallinity is found to result in a catalyst for converting methanol to lower olefins having increased catalyst life, increased selectivity for C.sub.2 -C.sub.3 olefins and decreased selectivity for paraffin production than the untreated SAPO-n starting composition.Type: GrantFiled: February 28, 1991Date of Patent: March 10, 1992Assignee: UOPInventor: Paul T. Barger
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Patent number: 5095164Abstract: Alkyl tert.-alkyl ethers can be cleaved into the underlying alkanols and tert.-olefins in the presence of strongly acidic substances in a column apparatus, the strongly acidic substance being made available at the foot of the column. A particularly advantageous process design results when a water stream is fed below the top column tray in countercurrent to the tert.-olefin flowing upwards and is taken off again from the column above the bottom circulation; in the case of using an insoluble, strongly acidic substance, the latter is located in a catalyst bed at the foot of the column, and the alkyl tert.-alkyl ether is preferably fed in between the catalyst bed and the bottom circulation evaporator.Type: GrantFiled: March 7, 1991Date of Patent: March 10, 1992Assignee: Ec Erdolchemie GmbHInventors: Christian Gabel, Bernhard Schleppinghoff, Hans-Dieter Kohler, Hans-Volker Scheef
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Patent number: 5091073Abstract: This invention relates to a novel synthetic crystalline molecular sieve composition, MCM-37, which may contain framework +3 valence element, e.g. aluminum, and +5 valence element, e.g. phosphorus or with an addition +4 valence element, e.g. silicon, and to use thereof as a support and in catalytic conversion of organic compounds. The crystalline composition of this invention can easily be converted to catalytically active material.Type: GrantFiled: July 13, 1990Date of Patent: February 25, 1992Assignee: Mobil Oil Corp.Inventors: Clarence D. Chang, Cynthia T. W. Chu, Ralph M. Dessau, John B. Higgins, John D. Lutner, John D. Schlenker