Patents by Inventor David E. Heather

David E. Heather 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).

  • Oligomerisation process
    Patent number: 8921590
    Abstract: The startup of a tubular reactor containing fresh or regenerated molecular sieve catalyst and cooled by steam generation on the shell side, as part of an olefin oligomerization process, is improved by, during the startup phase of the reactor, controlling the pressure on the shell side of the reactor at maximum 10 barg. The startup may be further improved by controlling the inlet temperature of the hydrocarbon startup stream to the reactor, by controlling the flow of reactant olefins to the reactor, or by controlling the nature and/or concentration of the olefins in the reactor feed.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: December 30, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Paul Hamilton, John S. Godsmark, David E. Heather
  • Oligomerisation Process
    Publication number: 20120283465
    Abstract: The startup of a tubular reactor containing fresh or regenerated molecular sieve catalyst and cooled by steam generation on the shell side, as part of an olefin oligomerisation process, is improved by, during the startup phase of the reactor, controlling the pressure on the shell side of the reactor at maximum 10 barg. The startup may be further improved by controlling the inlet temperature of the hydrocarbon startup stream to the reactor, by controlling the flow of reactant olefins to the reactor, or by controlling the nature and/or concentration of the olefins in the reactor feed.
    Type: Application
    Filed: November 23, 2010
    Publication date: November 8, 2012
    Inventors: Paul Hamilton, John S. Godsmark, David E. Heather