Patents by Inventor Daria N. Lissy

Daria N. Lissy 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).

  • Patent number: 5449851
    Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-35 under isomerization conditions to produce iso-olefins of corresponding carbon number, e.g., isobutene. High iso-olefin selectivities thus can be obtained, even at relatively low temperatures and high linear olefin partial pressures.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: September 12, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Iraj Rahmin, Albin Huss, Jr., Daria N. Lissy, Donald J. Klocke, Werner O. Haag
  • Patent number: 5401896
    Abstract: Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the presence of catalyst comprising zeolite MCM-49.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: March 28, 1995
    Assignee: Mobil Oil Corp.
    Inventors: Guenter H. Kuehl, Daria N. Lissy, Hye Kyung C. Timken
  • Patent number: 5401704
    Abstract: There is provided a process and a catalyst for hydrocracking hydrocarbons, such as gas oils. The catalyst comprises a hydrogenating metal and small crystal size zeolite Y. The zeolite Y may have a crystal size of less than one micron. Examples of hydrogenating metals include nickel and tungsten.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: March 28, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Robert P. L. Absil, James R. Katzer, Daria N. Lissy, Robert A. Ware, Stephen S. Wong
  • Patent number: 5371310
    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
  • 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: 5237121
    Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-22 having a crystal size whose largest dimension is no greater than 0.5 micron. The process is carried out under isomerization conditions to produce iso-olefins of corresponding carbon number, e.g., isobutene. High overall iso-olefin yields thus can be obtained, even at relatively low temperatures.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: August 17, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Iraj Rahmim, Albin Huss, Jr., Daria N. Lissy, Donald J. Klocke, Ivy D. Johnson
  • Patent number: 5236575
    Abstract: This invention relates to a new synthetic porous crystalline material, a method for its preparation and use thereof in catalytic conversion of organic compounds. The new crystalline material exhibits a distinctive X-ray diffraction pattern.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: August 17, 1993
    Assignee: Mobil Oil Corp.
    Inventors: J. Michael Bennett, Clarence D. Chang, Stephen L. Lawton, Michael E. Leonowicz, Daria N. Lissy, Mae K. Rubin
  • Patent number: 5219814
    Abstract: A moderate pressure hydrocracking process in which a highly aromatic, substantially dealkylated feedstock is processed to high octane gasoline and low sulfur distillate by hydrocracking over a catalyst, preferably comprising ultrastable Y and a Group VIII metal and a Group VI metal, in which the amount of the Group VIII metal content is incorporated at specified proportion into the framework aluminum content of the ultrastable Y component. The feedstock which is preferably a light cycle oil has an aromatic content of at least 50, usually at least 60 percent, and an API gravity not more than 25. The hydrocracking typically operates at 400-1000 psig at moderate to high conversion levels to maximize the production of monocyclic aromatics which provide the requisite octane value to the product gasoline. The distillate products from the hydrocracker are reduced in their sulfur content.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: June 15, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Garry W. Kirker, Michael E. Landis, Daria N. Lissy, Sadi Mizrahi, Michael S. Sarli, Stuart S. Shih
  • Patent number: 5157194
    Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-22 having a crystal size whose largest dimension is no greater than 0.5 micron. The process is carried out under isomerization conditions to produce iso-olefins of corresponding carbon number, e.g., isobutene. High overall iso-olefin yields thus can be obtained, even at relatively low temperatures.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: October 20, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Iraj Rahmim, Albin Huss, Jr., Daria N. Lissy, Donald J. Klocke, Ivy D. Johnson