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:
May. 26, 1981
Filed:
Jul. 17, 1979
Andras G Kortbeek, Amsterdam, NL;
Wilhelmina J van der Linden-Lemmers, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
A TiCl.sub.3 olefin polymerization catalyst component is prepared by reducing TiCl.sub.4 with an aluminum trihydrocarbyl compound in a molar ratio of Ti:Al of 2.7:1 to 4.0:1 in the presence of diisoamyl ether and a hydrocarbon solvent by gradually adding TiCl.sub.4 to the aluminum trihydrocarbyl compound and at least a substantial proportion of the diisoamyl ether at a temperature of from 15.degree. to 50.degree. C. during a period of from 0.7 to 2.5 hours to produce a precipitate of TiCl.sub.3, and thereafter converting the precipitate into active TiCl.sub.3 by heating at a temperature of from 80.degree. to 110.degree. C. during at least 30 minutes. The active TiCl.sub.3, when combined with a conventional organoaluminum cocatalyst, provides a stereospecific catalyst for the polymerization of alpha monoolefins having high activity, good morphology and good stereospecificity.