Patents by Inventor Stephen Anthony Leng

Stephen Anthony Leng 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).

  • Fischer-tropsch process
    Patent number: 7012102
    Abstract: The present invention provides a process for the conversion of synthesis gas to hydrocarbons comprising the steps of: a) contacting synthesis gas at an elevated temperature and pressure with a particulate Fischer-Tropsch catalyst in a Fischer-Tropsch reactor system to generate hydrocarbons comprising gaseous and liquid hydrocarbons; b) in a gas separation zone, separating a gaseous phase comprising saturated gaseous hydrocarbons from a liquid phase comprising liquid hydrocarbons and from the particulate Fischer-Tropsch catalyst; c) passing at least a portion of the separated gaseous phase to a dehydrogenation reactor where at least a portion of the saturated gaseous hydrocarbons are converted to unsaturated hydrocarbons; and d) recycling at least a portion of said unsaturated hydrocarbons back to the Fischer-Tropsch reactor system.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: March 14, 2006
    Assignees: BP Exploration Operating Company Limited, Davy Process Technology Limited
    Inventors: Josephus Johannes Helena Maria Font Freide, Stephen Anthony Leng, Christopher Sharp
  • Fischer-tropsch process
    Patent number: 6903140
    Abstract: Process for the conversion of synthesis gas to a product comprising liquid hydrocarbons and oxygenates. The process includes contacting synthesis gas at an elevated temperature and pressure with a mixed particulate catalyst comprising a mixture of a particulate Fischer-Tropsch catalyst and a particulate oxygenate synthesis catalyst.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: June 7, 2005
    Assignees: BP Exploration Operating C Company Limited, Davy Process Technology Limited
    Inventors: Josephus Johannes Helena Maria Font Freide, Stephen Anthony Leng, David Charles Griffiths
  • Fischer-tropsch process
    Publication number: 20040157941
    Abstract: A process for the conversion of synthesis gas to a product comprising liquid hydrocarbons and oxygenates wherein said process comprises contacting synthesis gas at an elevated temperature and pressure with a mixed particulate catalyst comprising a mixture of a particulate Fischer-Tropsch catalyst and a particulate oxygenate synthesis catalyst.
    Type: Application
    Filed: October 29, 2003
    Publication date: August 12, 2004
    Inventors: Josephus Johannes Helena Maria Font Freide, Stephen Anthony Leng, David Charles Griffiths
  • Fischer-tropsch process
    Publication number: 20040132837
    Abstract: The present invention provides a process for the conversion of synthesis gas to hydrocarbons comprising the steps of: a) contacting synthesis gas at an elevated temperature and pressure with a particulate Fischer-Tropsch catalyst in a Fischer-Tropsch reactor system to generate hydrocarbons comprising gaseous and liquid hydrocarbons; b) in a gas separation zone, separating a gaseous phase comprising saturated gaseous hydrocarbons from a liquid phase comprising liquid hydrocarbons and from the particulate Fischer-Tropsch catalyst; c) passing at least a portion of the separated gaseous phase to a dehydrogenation reactor where at least a portion of the saturated gaseous hydrocarbons are converted to unsaturated hydrocarbons; and d) recycling at least a portion of said unsaturated hydrocarbons back to the Fischer-Tropsch reactor system.
    Type: Application
    Filed: November 6, 2003
    Publication date: July 8, 2004
    Inventors: Josephus Johannes Helena Maria Font Freide, Stephen Anthony Leng, Christopher Sharp