Patents Represented by Attorney J. J. Kliebert

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  • Producing low sulfur naphtha products through improved olefin isomerization
    Patent number: 7288181
    Abstract: The instant invention relates to a process to produce high octane, low sulfur naphtha products through the removal of basic nitrogen-containing compounds with subsequent skeletal isomerization of feed olefins and hydrotreating.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: October 30, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Stuart S. Shih, David L. Stern, Madhav Acharya
  • Process for preparing basestocks having high VI
    Patent number: 7282137
    Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: October 16, 2007
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jr., Jeenok T. Kim
  • Selective hydroprocessing and mercaptan removal
    Patent number: 7244352
    Abstract: A process for producing a naphtha having a decreased amount of sulfur by selective hydroprocessing a petroleum feedstream comprising cracked naphtha to reduce its sulfur content with minimum loss of octane. The reduced sulfur naphtha stream contains mercaptan sulfur reversion products that are removed preferably by use of an aqueous base solution containing a catalytically effective amount of a phase transfer catalyst.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: July 17, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Thomas R. Halbert, Craig A. McKnight, John P. Greeley, Bruce R. Cook, Garland B. Brignac, Mark A. Greaney, Robert C. Welch
  • Process for producing lubricant base oils
    Patent number: 7179365
    Abstract: The instant invention is an improved process for producing naphthenic base oils from low quality feedstocks.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: February 20, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Keith K. Aldous, Jacob B. Angelo, Christopher J. S. Kent, Geraldine P. Gatton