Patents by Inventor Henry Van Zwet

Henry Van Zwet 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).

  • Treatment of contaminated hydrocarbon from olefin polymerization
    Patent number: 4065610
    Abstract: In conventional olefin polymerization using TiCl.sub.3 -containing Ziegler type catalysts, the catalyst-containing reaction product may be de-ashed by treatment with titanium-solubilizing compounds such as alcohols and the polymer product from the de-ashing step washed with a hydrocarbon to separate it from catalyst residue. It is desirable to treat the dirty hydrocarbon wash liquid to recover purified hydrocarbon suitable for recycle to the polymerization reaction. According to this invention the dirty hydrocarbon wash liquid is treated with an epoxy compound in the presence of an alcohol and distilled to recover purified hydrocarbon suitable for recycle.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: December 27, 1977
    Assignee: Shell Oil Company
    Inventors: Jan W. De Beukelaar, Henry Van Zwet, Jacob B. Roest