Patents by Inventor Robert Bachtel

Robert Bachtel 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).

  • Presulfiding OCR catalyst replacement batches
    Publication number: 20050006283
    Abstract: Catalyst particles are presulfided in a pretreatment zone separate from a hydroconversion reaction zone. The presulfided catalyst is then added to a moving bed of catalyst in the hydroconversion reaction zone at reaction pressure, so that the reactor is not shut down to replace catalyst. The presulfiding process is particularly beneficial for use in moving bed reactors for heavy oil conversion.
    Type: Application
    Filed: May 6, 2004
    Publication date: January 13, 2005
    Inventors: Pak Leung, David Earls, Bruce Reynolds, David Johnson, Robert Bachtel, Harold Trimble
  • Upflow reactor system with layered catalyst bed for hydrotreating heavy feedstocks
    Patent number: 6554994
    Abstract: A reactor system and process for hydrotreating a heavy feedstock contaminated with metals sulfur and carbon residue using an upflow fixed bed reactor with at least two catalyst layers having different hydrogenation activity.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: April 29, 2003
    Assignee: Chevron U.S.A. Inc.
    Inventors: Bruce E. Reynolds, Fred W. Lam, Julie Chabot, Fernando J. Antezana, Robert Bachtel, Kirk R. Gibson, Richard Threlkel, Pak C. Leung