Patents by Inventor Abraham Van Mannekes

Abraham Van Mannekes 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).

  • Purification of propylene polymerization product
    Patent number: 4167619
    Abstract: This invention is directed to an improved method for the work-up of the reaction product from stereospecific polymerization of propylene with Ziegler Type catalysts in a liquid phase polymerization process employing a C.sub.3 reaction medium. The product work-up comprises treatment of the reactor effluent slurry with a small amount of a C.sub.3 or C.sub.4 alkanol and with oxygen or an effective peroxide, followed by washing of the polymer with a C.sub.3 hydrocarbon medium containing a small amount of a C.sub.3 or C.sub.4 alkanol.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: September 11, 1979
    Assignee: Shell Development Company
    Inventors: Abraham Van Mannekes, Ross T. Channon, Jan W. De Beukelaar