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:
Aug. 31, 1976
Filed:
Jul. 09, 1974
Henri A Aboutboul, Brussels, BE;
William Kirch, Clinton, IA (US);
Jerome H Krekeler, Cincinnati, OH (US);
National Petro Chemicals Corporation, New York, NY (US);
Abstract
An olefin polymerization catalyst comprising a silica xerogel support having a pore volume greater than about 2.0 cc/g, the major portion of which volume is provided by pores having pore diameters ranging from 300 to 600 A and a surface area ranging from 200 to 500 m.sup.2 /g, and having deposited thereon a metal-containing catalytic material, such as chromium oxide, or other metal oxide. Further, a polymerization process utilizing such a catalyst for the preparation of polyolefins having relatively low molecular weights and high melt indexes without loss of catalyst activity, especially a process for the preparation of polymers and copolymers of 1-olefins having a maximum of 8 carbon atoms in the chain and having no branching nearer the double bond than the 4-position, e.g., ethylene polymers.