Abstract: There is provided a process for ring opening of aromatics or cycloaliphatics, as well as isomerization of aliphatics. The feedstream to this process comprises hydrocarbons having 6 carbon atoms. The process involves the use of a recycle stream containing a source of chlorine, such as carbon tetrachloride, and this process involves the use of at least two reactors connected in series. The first reactor comprises a ring opening catalyst and is operated under conditions which particularly promote ring opening. The catalyst in this first reactor may comprise zirconia modified with tungstate and platinum. A second, downstream reactor is operated under conditions to promote isomerization of aliphatics. The catalyst in the second reactor may comprise alumina, platinum and a chloride component. The catalysts in both the first and second reactors are chlorine resistant.
Type:
Grant
Filed:
July 22, 1993
Date of Patent:
January 17, 1995
Assignee:
Mobil Oil Corp.
Inventors:
Clarence D. Chang, Roy D. Bastian, Scott Han, Jose G. Santiesteban
Abstract: A process for shape selective hydrocarbon conversion that involves contacting a hydrocarbon feedsteam, including ethylbenzene, under conversion conditions with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.
Type:
Grant
Filed:
May 28, 1993
Date of Patent:
January 17, 1995
Assignee:
Mobil Oil Corp.
Inventors:
Jeffrey S. Beck, Sharon B. McCullen, David H. Olson, Chaya R. Venkat
Abstract: There is provided a gallium-containing MCM-22 zeolite. There are also provided methods for making this zeolite and processes for using this zeolite as a catalyst for the conversion of organic molecules. Particular conversions are reforming and the dehydrogenation of methylcyclohexane to form toluene.
Abstract: There is provided a process for ring opening of aromatics and cycloaliphatics, as well as isomerization of aliphatics. The feedstream to this process comprises hydrocarbons having 6 carbon atoms. The process involves the use of at least two reactors connected in series. The first reactor comprises a zeolite catalyst and is operated under conditions which particularly promote ring opening. The catalyst in this first reactor may comprise zeolite Beta and platinum. A downstream reactor is operated under conditions to promote isomerization of aliphatics. The catalyst in the second reactor may comprise alumina, platinum and a chloride component. Hydrogen in the effluent of the first reactor may be removed and recycled to the first reactor. Hydrogen required for the second reactor may be satisfied by hydrogen remaining dissolved in the effluent from the first reactor after hydrogen is recycled to the first reactor.
Type:
Grant
Filed:
July 12, 1993
Date of Patent:
January 17, 1995
Assignee:
Mobil Oil Corp.
Inventors:
Lloyd L. Breckenridge, Kenneth J. Del Rossi, Albin Huss, Jr., Clinton R. Kennedy, Garry W. Kirker
Abstract: There is provided a method for preparing an alumina bound, zeolite catalyst, wherein a zeolite of low silanol content is used as the source of zeolite used to prepare the catalyst. A particular zeolite used in this catalyst is zeolite Y. This catalyst may be combined with at least one hydrogenation component and used to hydrocrack hydrocarbons, such as gas oils. In particular, an NiW/USY/alumina catalyst may be used in a hydrocracking reaction to produce distillate boiling range hydrocarbons from higher boiling hydrocarbons.
Type:
Grant
Filed:
June 3, 1993
Date of Patent:
January 3, 1995
Assignee:
Mobil Oil Corp.
Inventors:
Kathleen M. Keville, Hye K. C. Timken, Robert A. Ware
Abstract: A process for shape selective hydrocarbon conversion involves contacting a hydrocarbon feedstream under conversion conditions with a catalytic molecular sieve which has been modified by treatment with an amino silane polymer while molecular sieve acid sites are protected. When the process is toluene disproportionation, a toluene feedstream may also contain a second silicon source which is a high pxylene selectivating agent. The invention also includes the modification method and the shape selective catalyst which results from the modification.
Type:
Grant
Filed:
April 5, 1993
Date of Patent:
December 6, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Rudolph M. Lago, David O. Marler, Sharon B. McCullen, David H. Olson
Abstract: Relatively short chain alkyl aromatic compounds are prepared by alkylating or transalkylating an alkylatable aromatic compound with a relatively short chain alkylating or transalkylating agent under sufficient reaction conditions in the presence of catalyst comprising zeolite MCM-49.
Type:
Grant
Filed:
June 16, 1993
Date of Patent:
December 6, 1994
Assignee:
Mobil Oil Corp.
Inventors:
J. Michael Bennett, Clarence D. Chang, Jane C. Cheng, Stephen L. Lawton, Michael E. Leonowicz, Daria N. Lissy, Mae K. Rubin, C. Morris Smith, Dennis E. Walsh
Abstract: There is provided a vacancy titanate intercalated with a cationic hydroxy aluminum complex, such as a Keggin ion. A method for making this material and a process for using this material as a catalyst are also provided.
Abstract: There is provided a hydrocarbon conversion process and a process for sorbing a sorbate wherein said conversion and sorption process each comprises the use of a porous material. A process for preparing this material involves adding an amphiphilic compound to the reaction mixture for preparing a crystalline oxide. The amphiphilic compound may be a quaternary ammonium cationic surfactant. These surfactants may be in the form of lamellar liquid crystals, and may function as templates for the formation of the present mesoporous oxide materials.
Type:
Grant
Filed:
February 1, 1994
Date of Patent:
December 6, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Jeffrey S. Beck, Charles T. Kresge, Sharon B. McCullen, Wieslaw J. Roth, James C. Vartuli
Abstract: A process for shape selective hydrocarbon conversion that involves contacting a hydrocarbon feedsteam, including toluene, under conversion conditions with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.
Type:
Grant
Filed:
May 28, 1993
Date of Patent:
November 22, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Jeffrey S. Beck, David H. Olson, Sharon B. McCullen
Abstract: 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:
Grant
Filed:
December 22, 1992
Date of Patent:
November 22, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Charles T. Kresge, David O. Marler, Gayatri S. Rav, Brenda H. Rose
Abstract: 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 preselectivated by agglomerating with an organosilicon compound. The invention also includes a method for agglomeration-preselectivation and the shape selective catalyst which results from the agglomeration preselectivation.
Type:
Grant
Filed:
February 25, 1993
Date of Patent:
November 15, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Clarence D. Chang, Cynthia T.-W. Chu, Thomas F. Degnan, Paul G. Rodewald, David S. Shihabi
Abstract: There is provided a process for converting organic compounds using a catalyst comprising a pillared, layered crystalline oxide material. This material may be prepared by intercepting a swellable layered oxide before calcination. The intercepted material is swollen and pillared. If the material is not intercepted in this manner, it is transformed into a zeolite by calcination. The pillared material may have a large degree of catalytic activity, and it may have rather porous layers.
Type:
Grant
Filed:
March 9, 1993
Date of Patent:
November 15, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Charles T. Kresge, Wieslaw J. Roth, Kenneth G. Simmons, James C. Vartuli
Abstract: A process for shape selective hydrocarbon conversion that involves contacting a hydrocarbon feedsteam, including toluene, under conversion conditions with a catalytic molecular sieve which has been modified by being ex situ selectivated with a silicon compound. The ex situ selectivation involves exposing the molecular sieve to at least two silicon impregnation sequences, each sequence comprising an impregnation with a silicon compound followed by calcination. The modified catalyst used in the process may also be steamed. Optionally, the modified catalyst may be trim-selectivated.
Type:
Grant
Filed:
May 28, 1993
Date of Patent:
November 15, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Jeffrey S. Beck, Sharon B. McCullen, David H. Olson
Abstract: There is provided a process for converting organic compounds using a catalyst comprising a pillared, layered crystalline oxide material with a characteristic X-ray diffraction pattern. This layered material is designated MCM-39. This layered material may be swollen, and the swollen material may be pillared.
Abstract: There are provided a catalyst, a method for making this catalyst, and a process for using this catalyst in the alkylation of an isoparaffin with an olefin to provide an alkylate. The catalyst may be made from an as-synthesized material which, upon calcination, is capable of generating zeolites designated MCM-22. The as-synthesized material is then combined with a binder material, such as alumina, by an extrusion process. The uncalcined bound material may then be ammonium exchanged, followed by a calcination treatment. The as-synthesized material may also be swollen with a suitable swelling agent, such as a cetyltrimethylammonium compound, prior to the binding process.
Type:
Grant
Filed:
April 5, 1993
Date of Patent:
October 11, 1994
Assignee:
Mobil Oil Corporation
Inventors:
Cynthia T-W. Chu, Altaf Husain, Kathleen M. Keville, Daria N. Lissy
Abstract: 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.
Abstract: 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:
Grant
Filed:
April 5, 1993
Date of Patent:
September 20, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Rudolph M. Lago, David O. Marler, Sharon B. McCullen
Abstract: There is provided a ring opening process using a catalyst comprising a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. An example of this catalyst is zirconia, modified with tungstate and platinum. This catalyst is used to convert cyclic hydrocarbons, such as cyclohexane and benzene, to paraffins, especially branched paraffins.
Type:
Grant
Filed:
July 22, 1993
Date of Patent:
September 6, 1994
Assignee:
Mobil Oil Corp.
Inventors:
Clarence D. Chang, Jose G. Santiesteban, David L. Stern
Abstract: There is provided a process for dewaxing a hydrocarbon feedstock, wherein the effluent from a dewaxing reaction zone is passed over an oligomerization catalyst under conditions sufficient to oligomerize olefins in this effluent. The temperature of the oligomerization reaction is less than the temperature of the dewaxing reaction.