Patents by Inventor Theodorus M. Smeets

Theodorus M. Smeets 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 recovering caprolactam
    Patent number: 7141668
    Abstract: The invention relates to a process for recovering caprolactam from a mixture comprising caprolactam, water, light and heavy components, by subjecting the mixture to a first vacuum distillation resulting in a first bottom product comprising heavy components and caprolactam and in a fist overhead product comprising caprolactam, water, unsaturated lactams and light components; and subjecting at least part of the unsaturated lactams to a hydrogenation.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: November 28, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Theodorus M Smeets, Gerardus W. A. Hangx
  • Process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a catalyst
    Patent number: 6747181
    Abstract: The invention relates to a process for the hydrogenation of phenyl acetylene in a styrene-containing medium with the aid of a supported nickel catalyst with a nickel content of 10-25 wt. %. This process is by preference used for the hydrogenation of phenyl acetylene in a styrene-containing medium which contains more that 30 wt. % of styrene.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: June 8, 2004
    Assignee: DSM N.V.
    Inventors: Hubertus J. M. Bosman, Edwin J. Grootendorst, Leonardus H. Postma, Theodorus M. Smeets
  • Process to separate rhodium from an organic mixture
    Patent number: 6231821
    Abstract: Process to separate rhodium from an organic starting mixture comprising of an organic solvent, C6-dicarboxylic acids and iodide compounds, wherein rhodium is separated by extracting the organic starting mixture with an aqueous solvent containing C6-dicarboxylic acids and an iodide compound resulting in an organic raffinate poor in rhodium and an aqueous extract rich in rhodium.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: May 15, 2001
    Assignees: DSM N.V., E.I. Du Pont de Nemours and Company
    Inventors: Jeroen A. F. Boogers, Theodorus M. Smeets