The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 1979
Filed:
Apr. 21, 1978
Applicant:
Inventors:
Abraham Van Mannekes, The Hague, NL;
Ross T Channon, Amsterdam, NL;
Jan W De Beukelaar, Amsterdam, NL;
Assignee:
Shell Development Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
528483 ; 526351 ; 528493 ; 528494 ; 528496 ;
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.