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:
Oct. 23, 2012
Filed:
Feb. 27, 2009
John R. Parrish, Charleston, WV (US);
Jeffrey B. Drabish, Elkview, WV (US);
Oscar M. Longoria, Jr., Rockport, TX (US);
James L. Swecker, Ii, Clendenin, WV (US);
John R. Parrish, Charleston, WV (US);
Jeffrey B. Drabish, Elkview, WV (US);
Oscar M. Longoria, Jr., Rockport, TX (US);
James L. Swecker, II, Clendenin, WV (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
A method and apparatus are disclosed for controlling product discharge from a fluidized bed reactor and for minimizing the loss of the unreacted monomer in the fluidizing gas upon removing the solid polymer product from the reactor. The method and apparatus utilize at least one detector in the product tank or its vent line and a control system in communication with the detector and the product tank fill valve, along with certain algorithms, to adjust by an iterative process, the product discharge time, thereby maximizing resin fill in the product tank and minimizing the lost reactor gas volume.