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:
Feb. 28, 2006
Filed:
Nov. 18, 2003
David H. Burns, Houston, TX (US);
Donald W. Verser, Houston, TX (US);
John D Hottovy, Bartlesville, OR (US);
Michael C. Carter, Humble, TX (US);
Robert W. Bohmer, Kingwood, TX (US);
David H. Burns, Houston, TX (US);
Donald W. Verser, Houston, TX (US);
John D Hottovy, Bartlesville, OR (US);
Michael C. Carter, Humble, TX (US);
Robert W. Bohmer, Kingwood, TX (US);
Chevron Phillips Chemical Company LP, The Woodlands, TX (US);
Abstract
A process is provided that produces polyolefins. The process comprises mixing a first stream, which comprises at least one catalyst deactivating agent, with a second stream, which comprises at least one polyolefin, at least one catalyst, at least one diluent, and at least one monomer, to produce a third stream, which comprises at least one polyolefin, at least one deactivated catalyst, at least one diluent, and at least one monomer. By utilizing the deactivating agent, polymerization can be slowed, or substantially stopped, when downstream equipment is being repaired or process control problems are being corrected. Later, polymerization can be restarted without the use of scavengers to remove poisons from the slurry polymerization reactor, and polyolefin production can be resumed.