Patents by Inventor Koert A. Vonkeman

Koert A. Vonkeman 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).

  • Process for the catalytic partial oxidation of hydrocarbons
    Patent number: 5510056
    Abstract: A process for the catalytic partial oxidation of a hydrocarbon feedstock comprises contacting a feed comprising a hydrocarbon feedstock and an oxygen-containing gas with a catalyst in a reaction zone, which catalyst is retained in the reaction zone in a fixed arrangement having a tortuosity of at least 1.1 and having at least 750 pores per square centimeter.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: April 23, 1996
    Assignee: Shell Oil Company
    Inventors: Ludovicus L. G. Jacobs, Peter W. Lednor, Alex G. G. Limahelu, Ronald J. Schoonebeek, Koert A. Vonkeman
  • Process for the preparation of carbon monoxide and/or hydrogen
    Patent number: 5486313
    Abstract: The present invention provides a process for the preparation of carbon monoxide and/or hydrogen from a hydrocarbon feedstock. The hydrocarbon feedstock is subjected in a first stage to a catalytic partial oxidation process in which it is contacted, as a gaseous mixture comprising the hydrocarbon feedstock and an oxygen-containing gas, which gaseous mixture also comprises nitrogen, with a catalyst comprising as a catalytically active metal rhodium, iridium or platinum. At least a portion of the products of the first stage is subjected in a second stage to a process in which ammonia and/or hydrogen cyanide is removed.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: January 23, 1996
    Assignee: Shell Oil Company
    Inventors: Krijn P. De Jong, Peter W. Lednor, Anna E. M. Oud, Ronald J. Schoonebeek, Koert A. Vonkeman, Gerardus P. Van Der Zwet