Patents by Inventor Kathleen M. Keville

Kathleen M. Keville 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: 20200407291
    Abstract: Co-feeding sulfolane into a transalkylation reactor along with the aromatic hydrocarbon feed(s) can improve benzene purity of the benzene product stream produced from the transalkylation product mixture, especially at the beginning phase of a catalyst cycle.
    Type: Application
    Filed: May 12, 2020
    Publication date: December 31, 2020
    Inventors: Jesus A. Ramos, Robert G. Tinger, Paul Podsiadlo, Todd E. Detjen, Kathleen M. Keville
  • Patent number: 10766834
    Abstract: Disclosed are selectivated transalkylation catalyst compositions and methods of making the same. The selectivated transalkylation catalyst compositions have a zeolite framework structure of MWW, FAU, BEA*, or MOR, or mixtures thereof, and are selectivated with a selectivating solution. The selectivating solution includes a dissolved ion of at least one element in Group 1, Group 2, Group 15, Group 16, or Group 17 of the Periodic Table. Also disclosed are processes of producing ethylbenzene and cumene using the selectivated transalkylation catalyst compositions.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: September 8, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Brett T. Loveless, Daniel J. Benedict, Kathleen M. Keville, Juan D. Henao, Matthew S. Ide
  • Patent number: 10450243
    Abstract: A process is provided for producing xylene by transalkylation including introducing sulfur into a reactor containing a catalyst system prior to first introduction of hydrocarbon feedstock into the reactor; introducing hydrocarbon feedstock into the reactor upon the concentration of sulfur downstream of the catalyst system meeting a predetermined sulfur breakthrough concentration; continuing sulfur introduction for a period of time after first introducing hydrocarbon feedstock into the reactor; reducing the concentration of sulfur introduced upon ?T decreasing to or below a predetermined sulfur reduction threshold; and discontinuing sulfur introduction upon ?T decreasing to or below a predetermined sulfur shutoff threshold.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: October 22, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Xiaobo Zheng, Robert G. Tinger, Timothy P. Bender, Kathleen M. Keville, Jeffrey L. Andrews
  • Publication number: 20180251413
    Abstract: Disclosed are selectivated transalkylation catalyst compositions and methods of making the same. The selectivated transalkylation catalyst compositions have a zeolite framework structure of MWW, FAU, BEA*, or MOR, or mixtures thereof, and are selectivated with a selectivating solution. The selectivating solution includes a dissolved ion of at least one element in Group 1, Group 2, Group 15, Group 16, or Group 17 of the Periodic Table. Also disclosed are processes of producing ethylbenzene and cumene using the selectivated transalkylation catalyst compositions.
    Type: Application
    Filed: February 19, 2018
    Publication date: September 6, 2018
    Inventors: Brett T. Loveless, Daniel J. Benedict, Kathleen M. Keville, Juan D. Henao, Matthew S. Ide
  • Publication number: 20160176786
    Abstract: A process is provided for producing xylene by transalkylation including introducing sulfur into a reactor containing a catalyst system prior to first introduction of hydrocarbon feedstock into the reactor; introducing hydrocarbon feedstock into the reactor upon the concentration of sulfur downstream of the catalyst system meeting a predetermined sulfur breakthrough concentration; continuing sulfur introduction for a period of time after first introducing hydrocarbon feedstock into the reactor; reducing the concentration of sulfur introduced upon ?T decreasing to or below a predetermined sulfur reduction threshold; and discontinuing sulfur introduction upon ?T decreasing to or below a predetermined sulfur shutoff threshold.
    Type: Application
    Filed: September 22, 2015
    Publication date: June 23, 2016
    Inventors: Xiaobo Zheng, Robert G. Tinger, Timothy P. Bender, Kathleen M. Keville, Jeffrey L. Andrews
  • Patent number: 6878654
    Abstract: The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then contacting the catalyst with an aqueous medium, such as an ammonium nitrate solution, an ammonium carbonate solution or an acid solution.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: April 12, 2005
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Ajit B. Dandekar, Michael Hryniszak, Jeffrey S. Beck, David L. Stern, Kathleen M. Keville
  • Publication number: 20030050521
    Abstract: The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then contacting the catalyst with an aqueous medium, such as an ammonium nitrate solution, an ammonium carbonate solution or an acid solution.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 13, 2003
    Inventors: Ajit B. Dandekar, Michael Hryniszak, Jeffrey S. Beck, David L. Stern, Kathleen M. Keville
  • Patent number: 5900520
    Abstract: Alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a paraffin alkylating agent under alkylation reaction conditions in the presence of catalyst comprising synthetic porous crystalline material characterized by an X-ray diffraction pattern including interplanar d-spacings at 12.36.+-.0.4, 11.03.+-.0.2, 8.83.+-.0.14, 6.18.+-.0.12, 6.00.+-.0.10, 4.06.+-.0.07, 3.91.+-.0.07, and 3.42.+-.0.06 Angstroms.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: May 4, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Dominick N. Mazzone, David O. Marler, Kathleen M. Keville, Larry A. Green
  • Patent number: 5516962
    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: August 1, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Cynthia T.-W. Chu, Altaf Husain, Kathleen M. Keville, Daria N. Lissy
  • Patent number: 5500109
    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: October 17, 1994
    Date of Patent: March 19, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Kathleen M. Keville, Hye K. C. Timken, Robert A. Ware
  • Patent number: 5378671
    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
  • Patent number: 5354718
    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
  • Patent number: 5326462
    Abstract: Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization followed by treatment over an acidic catalyst system comprising a zeolite having the topology of ZSM-5 and a zeolite sorbing 10 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per gram dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. The treatment over the acidic catalyst system in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: July 5, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Stuart S-S. Shih, Kathleen M. Keville, Daria N. Lissy
  • Patent number: 5298150
    Abstract: Low sulfur gasoline of relatively high octane number is produced from a catalytically cracked, sulfur-containing naphtha by hydrodesulfurization followed by treatment over an acidic catalyst comprising a zeolite sorbing 10 to 40 mg 3-methylpentane at 90.degree. C., 90 torr, per gram dry zeolite in the hydrogen form, e.g., ZSM-22, ZSM-23, or ZSM-35. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the feed naphtha. The use of the specified zeolite provides greater desulfurization, gasoline selectivity, and octane than obtained using ZSM-5.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: March 29, 1994
    Assignee: Mobil Oil Corporation
    Inventors: David L. Fletcher, Michael S. Sarli, Stuart S-S. Shih, Kathleen M. Keville, Daria N. Lissy
  • Patent number: 5296428
    Abstract: There is provided a catalyst comprising MCM-36 and a hydrogenation/dehydrogenation component. A particular example of such a catalyst comprises MCM-36, nickel and tungsten.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: March 22, 1994
    Assignee: Mobil Oil Corp.
    Inventors: Thomas F. Degnan, Kathleen M. Keville, Charles T. Kresge, David O. Marler, Brenda H. Rose, Wieslaw J. Roth, Kenneth G. Simons, deceased, Hye K. C. Timken, James C. Vartuli
  • Patent number: 5294330
    Abstract: There is provided a hydrocracking process with a catalyst comprising MCM-36.
    Type: Grant
    Filed: August 12, 1992
    Date of Patent: March 15, 1994
    Assignee: Mobil Oil Corp.
    Inventors: Thomas F. Degnan, Kathleen M. Keville, Charles T. Kresge, David O. Marler, Brenda H. Rose, Wieslaw J. Roth, Hye Kyung C. Timken
  • Patent number: 5290744
    Abstract: A hydrocracking catalyst with improved distillate selectivity comprises, in addition to a metal component, a mesoporous crystalline material together with a molecular sieve component of relatively smaller pore size. The metal component of the catalyst is preferably associated with the high-surface area mesoporous component and high-metal loadings can be achieved in order to give good hydrogenation activity to the catalyst. The relatively smaller pore size component is preferably a large pore size zeolite such as zeolite Y or an intermediate pore size zeolite such as ZSM-5; this component provides a higher level of acidic functionality than the mesoporous component, achieving a functional separation in the hydrocracking process, permitting the metals loading and acidic activities to be optimized for good catalyst selectivity and activity. The catalysts enable the distillate selectivities comparable to amorphous catalyst to be achieved with improved conversion activity.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: March 1, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Thomas F. Degnan Jr., Kathleen M. Keville, Michael E. Landis, David O. Marler, Dominick N. Mazzone
  • Patent number: 5281328
    Abstract: A hydrocracking process uses a catalyst which is based on an ultra-large pore crystalline material. The crystalline material has pores of at least 13 .ANG. diameter arranged in a uniform manner and exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams (50 torr and 25.degree. C.). A preferred form of the catalyst has a hexagonal structure which exhibits a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 .ANG.. The hydrocracking catalysts based on these materials are capable of producing hydrocracked products of improved quality with lower nitrogen and aromatic content.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: January 25, 1994
    Assignee: Mobil Oil Corporation
    Inventors: Thomas F. Degnan, Jr., Kathleen M. Keville, David O. Marler, Dominick N. Mazzone
  • Patent number: 5260501
    Abstract: A novel oligomerization catalyst and process for upgrading olefins employing new synthetic catalyst of ultra-large pore crystalline material. The new crystalline material exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams at 50 torr and 25.degree. C., 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; and the porous crystalline material is impregnated with at least one oligomerization promoting metal, such as Groups VIIIA metals, preferably nickel.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: November 9, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Nazeer A. Bhore, Ivy D. Johnson, Kathleen M. Keville, Quang N. Le, Grant H. Yokomizo
  • Patent number: 5183561
    Abstract: There is provided a process for demetallizing hydrocarbon feedstocks, such as resids or shale oil. The process uses a catalyst comprising at least one hydrogenation metal, such as nickel and molybdenum, and an ultra-large pore oxide material. This ultra-large pore oxide material may have uniformly large pores, e.g., having a size of about 40 Angstroms in diameter.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: February 2, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Charles T. Kresge, Michael E. Leonowicz, Wieslaw J. Roth, James C. Vartuli, Kathleen M. Keville, Stuart S. Shih, Thomas F. Degnan, Francis G. Dwyer, Michael E. Landis