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:
Mar. 17, 2009
Filed:
Apr. 07, 2004
Stephanie M. Whited, Charleston, WV (US);
Michael D. Turner, Hurricane, WV (US);
Michael A. Kinnan, Charleston, WV (US);
Robert J. Jorgensen, Scott Depot, WV (US);
Stephanie M. Whited, Charleston, WV (US);
Michael D. Turner, Hurricane, WV (US);
Michael A. Kinnan, Charleston, WV (US);
Robert J. Jorgensen, Scott Depot, WV (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A gas phase polymerization process comprising: (1) preparing a solution of a catalyst precursor comprising a mixture of magnesium and titanium compounds, an electron donor and a solvent; (2) adding a filler to the solution from step (1) to form a slurry; (3) spray drying the slurry from step (2) at a temperature of 100 to 140° C. to form a spray dried precursor, (4) slurring the spray dried precursor from step (3) in mineral oil, (5) partially or fully pre-activating the catalyst precursor by contacting the slurry of (4) with one or more Lewis Acids, and (6) transferring the partially or fully activated precursor from step (5) into a gas phase reactor in which an olefin polymerization reaction is in progress.