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:
Dec. 27, 2011
Filed:
Feb. 11, 2008
Agapios K. Agapiou, Humble, TX (US);
David M. Glowczwski, Baytown, TX (US);
Zerong Lin, Kingwood, TX (US);
Gary D. Mohr, Houston, TX (US);
Ted A. Powell, La Porte, TX (US);
Michael E. Sieloff, Houston, TX (US);
Edward F. Smith, Kingwood, TX (US);
Kevin B. Stavens, Houston, TX (US);
Keith W. Trapp, Houston, TX (US);
Michael E. Muhle, Kingwood, TX (US);
F. David Hussein, Cross Lanes, WV (US);
Agapios K. Agapiou, Humble, TX (US);
David M. Glowczwski, Baytown, TX (US);
Zerong Lin, Kingwood, TX (US);
Gary D. Mohr, Houston, TX (US);
Ted A. Powell, La Porte, TX (US);
Michael E. Sieloff, Houston, TX (US);
Edward F. Smith, Kingwood, TX (US);
Kevin B. Stavens, Houston, TX (US);
Keith W. Trapp, Houston, TX (US);
Michael E. Muhle, Kingwood, TX (US);
F. David Hussein, Cross Lanes, WV (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A method of treating a gas phase fluidized bed reactor and a method of polymerizing olefins in a gas phase fluidized bed reactor in the presence of a catalyst prone to cause sheeting by introducing a chromium-containing compound into the reactor and forming a high molecular weight polymer coating on the walls of the reactor. Furthermore, a device for and method of introducing the chromium-containing compound into the fluidized bed reactor at a plurality of locations in proximity to a lower section of a bed section wall of the fluidized bed reactor, and forming a high molecular weight polymer coating on the bed section wall.