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. 19, 2013
Filed:
Jul. 23, 2009
Eric J. Markel, Kingwood, TX (US);
Robert O. Hagerty, Wyckoff, NJ (US);
Ryan W. Impelman, Houston, TX (US);
Richard B. Pannell, Kingwood, TX (US);
Cecile F. Saladino, Baytown, TX (US);
Eric J. Markel, Kingwood, TX (US);
Robert O. Hagerty, Wyckoff, NJ (US);
Ryan W. Impelman, Houston, TX (US);
Richard B. Pannell, Kingwood, TX (US);
Cecile F. Saladino, Baytown, TX (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A method for cleaning a distributor plate in a fluidized bed polymerization reactor system according to one embodiment includes, in a first mode, operating with about a normal, baseline value of superficial gas velocity in a fluidized bed polymerization reactor system having a reactor vessel, a recycle line, and a distributor plate in the reactor vessel near an inlet of the reactor vessel. In a second mode, the superficial gas velocity is increased above the baseline value of the first mode to a level sufficient to raise the temperature of the cycle gas at the inlet above an average temperature of the cycle gas at the inlet in the first mode, and to a level sufficient to dislodge foulant from holes in the distributor plate.