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. 06, 2012
Filed:
Oct. 08, 2009
Ping Cai, Lake Jackson, TX (US);
F. David Hussein, Cross Lanes, WV (US);
Ian D. Burdett, Charleston, WV (US);
David M. Gaines, St. Albans, WV (US);
Roger B. Painter, Rosharon, TX (US);
Ping Cai, Lake Jackson, TX (US);
F. David Hussein, Cross Lanes, WV (US);
Ian D. Burdett, Charleston, WV (US);
David M. Gaines, St. Albans, WV (US);
Roger B. Painter, Rosharon, TX (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A continuous gas phase circulating bed reactor, including: a riser for contacting a catalyst and a first gas composition comprising an olefin to form a polyolefin under fast-fluidization regime or a dilute-phase pneumatic conveying regime conditions; a downer for contacting the catalyst and a second gas composition comprising an olefin to form additional polyolefin under fast fluidization regime or a dilute-phase pneumatic conveying regime conditions; and a transport section for conveying at least a portion of the catalyst, polyolefin, and additional polyolefin from the downer to the riser. Also disclosed is a polymerization process using such a circulating bed reactor.