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:
Jan. 13, 2009
Filed:
May. 07, 2007
Ian Mckay, Calgary, CA;
Dusan Jeremic, Calgary, CA;
Paul Mesquita, Calgary, CA;
Grant Berent Jacobsen, Tervuren, BE;
Sergio Mastroianni, Brussels, BE;
Ian McKay, Calgary, CA;
Dusan Jeremic, Calgary, CA;
Paul Mesquita, Calgary, CA;
Grant Berent Jacobsen, Tervuren, BE;
Sergio Mastroianni, Brussels, BE;
Nova Chemicals(International) S.A., , CH;
Ineos Europe Limited, , GB;
Abstract
The use of high activity 'Single Site' polymerization catalysts often causes the fouling of polymerization reactors. The problem is particularly acute with gas phase polymerizations. While not wishing to be bound by theory it is believed that the fouling is initiated by the buildup of static charges in the reactor. The use of anti-static agents mitigates this problem, but typical antistatic agents contain polar species, which can deactivate the polymerization catalyst. We have now discovered that the use of a porous metal oxide support allows large levels of a selected antistatic agent to be used in a manner that reduces static/fouling problems in highly active polymerization catalysts.