Patents by Inventor Richard F. Sullivan

Richard F. Sullivan 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).

  • Low emissions diesel fuel
    Patent number: 5389111
    Abstract: A low emissions diesel fuel with prescribed levels of aromatics and cetane number is disclosed which, when combusted in a diesel engine, results in lower emissions than the California Reference diesel fuel.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: February 14, 1995
    Assignee: Chevron Research and Technology Company
    Inventors: Manuch Nikanjam, Richard F. Sullivan
  • Low emissions diesel fuel
    Patent number: 5389112
    Abstract: A low emissions diesel fuel with prescribed levels of aromatics and cetane number is disclosed which, when combusted in a diesel engine, results in lower emissions than the California Reference diesel fuel.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: February 14, 1995
    Assignee: Chevron Research and Technology Company
    Inventors: Manuch Nikanjam, Richard F. Sullivan
  • Catalyst system for hydrotreating hydrocarbons
    Patent number: 5071805
    Abstract: This invention provides a layered catalyst system for hydro-denitrification of hydrocarbons, such as vacuum gas oil, used for hydrocracking to produce various fuels. The layered catalyst system of this invention comprises a first layer of a nickel-molybdenum-phosphorus/alumina catalyst or a cobalt-molybdenum-phosphorus/alumina catalyst and a second layer catalyst comprising a nickel-tungsten/silica-alumina-zeolite or a nickel-molybdenum/silica-alumina-zeolite catalyst. The preferred aspects of the combination of the layered catalysts disclosed herein are: (a) the first layer alumina catalyst has a molybdenum content greater than about 14% by wt.; (b) the first layer alumina catalyst has a relatively large pore size, such as at least about 60 .ANG.; and (c) the second layer catalyst contains at least about 2% of a zeolite component. The layered catalyst system of this invention and the attendant process produces improved denitrification of feedstocks, improved catalyst life and other advantages.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: December 10, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Philip L. Winslow, Richard F. Sullivan
  • Process for hydrodenitrogenating hydrocarbon oils
    Patent number: 4990243
    Abstract: This invention provides a layered catalyst system for hydro-denitrification of hydrocarbons, such as vacuum gas oil, used for hydrocracking to produce various fuels. The layered catalyst system of this invention comprises a first layer of a nickel-molybdenum-phosphorus/alumina catalyst or a cobalt-molybdenum-phosphorus/alumina catalyst and a second layer catalyst comprising a nickel-tungsten/silica-alumina-zeolite or a nickel-molybdenum/silica-alumina-zeolite catalyst. The preferred aspects of the combination of the layered catalysts disclosed herein are: (a) the first layer alumina catalyst has a molybdenum content greater than about 14% by wt.; (b) the first layer alumina catalyst has a relatively large pore size, such as at least about 60 .ANG.; and (c) the second layer catalyst contains at least about 2% of a zeolite component. The layered catalyst system of this invention and the attendant process produces improved denitrification of feedstocks, improved catalyst life and other advantages.
    Type: Grant
    Filed: May 10, 1989
    Date of Patent: February 5, 1991
    Assignee: Chevron Research and Technology Company
    Inventors: Philip L. Winslow, Richard F. Sullivan
  • Process for upgrading arsenic-containing oils
    Patent number: 4141820
    Abstract: A method is provided for avoiding feed-transfer-line plugging by a deposit comprising arsenic in hydroprocessing an oil containing an arsenic contaminant. In the method, a mixture of hydrogen gas and the oil is formed in situ in a bed of porous particulate contact material.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: February 27, 1979
    Assignee: Chevron Research Company
    Inventor: Richard F. Sullivan