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:
Jun. 14, 1977
Filed:
Jun. 10, 1975
Applicant:
Inventors:
Hirohisa Yoshiura, Kurashiki, JA;
Toshiharu Arai, Kurashiki, JA;
Masao Miyake, Kurashiki, JA;
Yoshikane Furuya, Kurashiki, JA;
Seiji Onogi, Kurashiki, JA;
Tetsushi Kamizono, Kurashiki, JA;
Assignee:
Mitsubishi Chemical Industries Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528483 ; 260 / ; 526106 ; 526116 ; 528499 ;
Abstract
In a process for preparing a polyolefin without separation of catalyst residues by polymerizing an olefin in the pres ence of a Ziegler catalyst having high catalytic activity, in an inert gas sealing system; an improvement comprises separating the polyolefin containing the catalyst residue from the polymerization mixture, and contacting the polyolefin containing the catalyst residue with a weak reactive gas of oxygen and/or steam diluted with an inert gas.