Patents by Inventor Arthur W. Chester

Arthur W. Chester has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20030038058
    Abstract: This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecular sieve of low acid activity. The preferred molecular sieve is steamed ZSM-5. The benzene and toluene synthesis zone is operated under conditions compatible with the conditions of the reformer such as temperatures of above about 800° F. (427° C.). In one aspect on the invention, the benzene and toluene synthesis catalyst includes a metal hydrogenation component from group VII(B), specifically rhenium. In one mode of operation, the benzene and toluene synthesis catalyst replaces at least a portion of the catalyst in the reformer. The process produces a product containing an increased proportion of benzene, toluene, and/or xylenes, and a reduced portion of alkylated aromatics, as compared to reformate.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 27, 2003
    Inventors: Madhav Acharya, Jeffrey S. Beck, Robert A. Crane, Arthur W. Chester, Vinaya A. Kapoor, Richard C. Kovacs, David L. Stern
  • Publication number: 20020179498
    Abstract: The sulfur content of liquid cracking products, especially the cracked gasoline, of the catalytic cracking process is reduced by the use of a sulfur reduction catalyst composition comprising a porous molecular sieve which contains a metal in an oxidation state above zero within the interior of the pore structure of the sieve as well as a cerium component which enhances the stability and sulfur reduction activity of the catalyst. The molecular sieve is normally a faujasite such as USY. The primary sulfur reduction component is normally a metal of Period 3 of the Periodic Table, preferably vanadium. The sulfur reduction catalyst may be used in the form of a separate particle additive or as a component of an integrated cracking/sulfur reduction catalyst.
    Type: Application
    Filed: December 21, 1999
    Publication date: December 5, 2002
    Inventors: Arthur W. Chester, Terry G. Roberie, Hye Kyung C. Timken, Michael S. Ziebarth
  • Publication number: 20020153283
    Abstract: The sulfur content of liquid cracking products, especially the cracked gasoline, of the catalytic cracking process is reduced by the use of a sulfur reduction catalyst composition comprising a porous molecular sieve which contains a metal in an oxidation state above zero within the interior of the pore structure of the sieve as well as a cerium component which enhances the stability and sulfur reduction activity of the catalyst. The molecular sieve is normally a faujasite such as USY. The primary sulfur reduction component is normally a metal of Period 3 of the Periodic Table, preferably vanadium. The sulfur reduction catalyst may be used in the form of a separate particle additive or as a component of an integrated cracking/sulfur reduction catalyst.
    Type: Application
    Filed: December 28, 1998
    Publication date: October 24, 2002
    Inventors: ARTHUR W CHESTER, HYE KYUNG CHO TIMKEN, TERRY G ROBERIE, MICHAEL S ZIEBARTH
  • Patent number: 6447741
    Abstract: A mesoporous aluminophosphate material includes a solid aluminophosphate composition modified with at least one element selected from zirconium, cerium, lanthanum, manganese, cobalt, zinc, and vanadium. This mesoporous aluminophosphate material has a specific surface area of at least 100 m2/g, an average pore size less than or equal to 100 Å, and a pore size distribution such that at least 50% of the pores have a pore diameter less than 100 Å. The material can be used as a support for a catalytic cracking catalyst. Additionally, a method for making such a mesoporous aluminophosphate material is disclosed. The method, which preferably avoids use of organic reagents or solvents, includes providing an aqueous solution containing an inorganic phosphorus component; an inorganic aluminum containing component; and an inorganic modifying component containing at least one element selected from zirconium, cerium, lanthanum, manganese, cobalt, zinc, and vanadium.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: September 10, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventors: Arthur W. Chester, Frederick E. Daugherty, Charles T. Kresge, Hye-Kyung C. Timken, James C. Vartuli
  • Publication number: 20020049359
    Abstract: A process for preparing alkyl substituted aromatic compounds by alkylating an aromatic compound with an alkylating agent in the presence of a porous crystalline zeolite in which the zeolite has been selectively deluminated to remove nonframework aluminum.
    Type: Application
    Filed: March 20, 2001
    Publication date: April 25, 2002
    Inventors: Hye Kyung C. Timken, Arthur W. Chester, Susan Ardito, Mark P. Hagemeister
  • Publication number: 20020037805
    Abstract: A catalyst composition is disclosed comprising a zeolite having a non-framework aluminum content of about less than 25 percent of the total aluminum content, a bulk silica:alumina ratio of about 6.5 to about 10.0 and a unit cell size ranging from about 2.440 to about 2.464 nm.
    Type: Application
    Filed: May 11, 2001
    Publication date: March 28, 2002
    Inventors: Hye Kyung C. Timken, Arthur W. Chester, Susan C. Ardito, Mark P. Hagemeister
  • Publication number: 20010053868
    Abstract: A C4+naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.
    Type: Application
    Filed: July 12, 1999
    Publication date: December 20, 2001
    Inventors: ARTHUR W. CHESTER, KE LIU, ROBERT A. WARE
  • Patent number: 6310265
    Abstract: This invention relates to a process for isomerizing paraffins comprising the step of contacting a feed containing paraffins with a catalyst comprising a synthetic porous crystalline material, designated MCM-68, which exhibits a distinctive X-ray diffraction pattern and has a unique crystal structure which contains at least one channel system, in which each channel is defined by a 12-membered ring of tetrahedrally coordinated atoms, and at least two further, independent channel systems, in each of which each channel is defined by a 10-membered ring of tetrahedrally coordinated atoms, wherein the number of unique 10-membered ring channels is twice the number of 12-membered ring channels.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: October 30, 2001
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Arthur W. Chester, David C. Calabro, Sandeep S. Dhingra, Jean W. Beeckman, Timothy J. Fiebig, Glenn R. Sweeten, Terry E. Helton, Charles T. Kresge, Richard F. Socha, Simon C. Weston
  • Patent number: 6136291
    Abstract: Novel crystalline zeolitic materials of the faujasite structure having an increased ratio of zeolitic surface area to mesoporous surface area and distinctive X-Ray Diffraction peak ratios are produced by calcining zeolite Y of low sodium content at temperatures above 600.degree. C.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: October 24, 2000
    Assignee: Mobile Oil Corporation
    Inventors: Arthur W. Chester, C. Patricia Clement, Scott Han
  • Patent number: 5965474
    Abstract: A composition for passivating metal contaminants in catalytic cracking of hydrocarbons includes a non-layered, ultra-large pore crystalline material 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 anhydrous crystal at 50 torr and 25.degree. C., and a metal passivator incorporated within the crystalline material. A method for passivating contaminating metals uses the composition during catalytic cracking as an additive or as a component of the catalyst.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: October 12, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Jeffrey William Balko, Arthur W. Chester, Augusto Rodolfo Quinones
  • Patent number: 5779882
    Abstract: A layered composition of matter, MCM-56, has an X-ray diffraction pattern including lines at d-spacing values of 12.4.+-.0.2, 9.9.+-.0.3, 6.9.+-.0.1, 6.2.+-.0.1, 3.55.+-.0.07 and 3.42.+-.0.07 Angstroms and has been selectively modified so that the ratio of the number of active acid sites at its external surface to the number of internal active acid sites is greater than that of the unmodified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gasoline yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: July 14, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Arthur W. Chester, Anthony S. Fung, Charles T. Kresge, Wieslaw J. Roth
  • Patent number: 5763720
    Abstract: A heavy aromatics feed is converted to lighter aromatics products, such as benzene, toluene and xylenes by contacting a C.sub.9 + aromatics fraction and benzene and/or toluene over a catalyst comprising a zeolite, such as ZSM-12, and a hydrogenation component, preferably platinum. The catalyst, complete with hydrogenation component, is treated to reduce aromatics loss. Treatment includes exposure to steam and/or sulfur after incorporation of the hydrogenation component. For additional stability and aromatics retention the steamed and/or sulfur treated catalyst is sulfided by cofeeding a source of sulfur. In a further embodiment of the invention a low hydrogen partial pressure is employed to retain aromatics.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: June 9, 1998
    Assignee: Mobil Oil Corporation
    Inventors: John S. Buchanan, Arthur W. Chester, Anthony S. Fung, Timothy F. Kinn, Sadi Mizrahi
  • Patent number: 5514632
    Abstract: Silicon-containing species which evolve from the calcination of silicone treated catalysts may be removed by the use of an alumina-containing guard bed. The method is particularly useful for the production of silicone treated ZSM-5 catalysts.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Arthur W. Chester, Jocelyn A. Kowalski
  • Patent number: 5258114
    Abstract: A process and catalyst for catalytic cracking comprising a non-layered, ultra-large pore crystalline material. The crystalline material preferably has a benzene adsorption capacity greater than about 15 grams benzene/100 grams at 50 torr and 25.degree. C. Preferred materials have a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 Angstrom Units and a hexagonal arrangement of uniformly sized pores with a maximum perpendicular cross section of at least about 13 Angstrom units. Preferred cracking catalysts comprise ultra-large pore materials having pore openings formed by at least 20 tetrahedrally coordinated members, most preferably with 36 or 42 tetahedrally coordinated members.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: November 2, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Brent A. Aufdembrink, Arthur W. Chester, Joseph A. Herbst, Charles T. Kresge
  • Patent number: 5243112
    Abstract: Lower olefins are upgraded to high viscosity index lubricants by converting olefinic feed over a medium pore zeolite catalyst consisting essentially of aluminosilicate HzSM-22 under oligomerization conditions.
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: September 7, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Arthur W. Chester, Francis G. Dwyer, William E. Garwood, James C. Vartuli
  • Patent number: 5036159
    Abstract: Ternary oxide phases, including copper oxide, which exhibit unusal electronic properties, have been determined to exhibit catalytic function for the oxidiation of carbon monoxide, the hydrogenation of ethylene and the cracking of hydrocarbons.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: July 30, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Brent A. Aufdembrink, Arthur W. Chester, Pochen Chu
  • Patent number: 4919787
    Abstract: An improved method for passivating metals in a hydrocarbon feedstock during catalytic cracking has been discovered. The method involves contacting the feedstock with a passivating agent comprising a precipitated porous rare earth oxide, alumina, and aluminum phosphate precipitate. The passivating agent may be coated on a cracking catalyst, be part of the matrix of a cracking catalyst, or be added to the cracking operation as discrete particles.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: April 24, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Arthur W. Chester, Pochen Chu, Albin Huss, Jr., Garry W. Kirker
  • Patent number: 4910181
    Abstract: The catalyst composition comprises a layered metal oxide and/or sulfide of a metal selected from the group consisting of Group VB and VIB metals and containing inserted atomic hydrogen therein, with no chemical bond between said atomic hydrogen and anionic oxygen or anionic sulfur of the oxide or sulfide. It is useful for demetallizing resids.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: March 20, 1990
    Assignee: Mobil Oil Corporation
    Inventors: Philip J. Angevine, Arthur W. Chester, Thomas F. Degnan, Garry W. Kirker
  • Patent number: 4873216
    Abstract: This invention relates to a new catalyst composition. The catalyst composition comprises a catalytic component and a support comprising an amorphous combination of lanthana, alumina and aluminum phosphate, and may be characterized after calcination by a pore size distribution including about 5 to 20 vol. % within the pore size diameter range of 50 to 100 Angstroms, about 10 to 35 vol. % within the pore size diameter range of 100 to 150 Angstroms, about 15 to 50 vol. % within the pore size diameter range of 150 to 200 Angstroms and about 10 to 50 vol. % within the pore size diameter range of 200 to 400 Angstroms.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: October 10, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Robert P. L. Absil, Philip J. Angevine, Arthur W. Chester, Garry W. Kirker
  • Patent number: 4810357
    Abstract: Relatively heavy or relatively light lube chargestocks are dewaxed in two parallel, separate reactors. The reactor used for dewaxing the relatively light chargestocks contains a crystalline aluminosilicate zeolite exemplified natural or synthetic ferrierite, ZSM-22, ZSM-23 and ZSM-35 zeolites and/or mixtures thereof. The reactor used for dewaxing the relatively heavy chargestocks contains a crystalline aluminosilicate zeolite exemplified by ZSM-5, ZSM-11 zeolites, ZSM-5/ZSM-11 intermediates and/or mixtures thereof.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: March 7, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Arthur W. Chester, William E. Garwood, James C. Vartuli