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:
Nov. 10, 2015
Filed:
Dec. 13, 2011
Mark W. Blood, Hurricane, WV (US);
Randall L. Force, Charleston, WV (US);
Theodore D. Duncan, Elkview, WV (US);
George W. Schwarz, Jr., Charleston, WV (US);
Daniel W. Mosser, Hurricane, WV (US);
Donald A. Fischer, Cross Lane, WV (US);
Robert D. Olson, Charleston, WV (US);
James Leland Swecker, Ii, Clendenin, WV (US);
Cloid Russell Smith, Iii, Charleston, WV (US);
Mark W. Blood, Hurricane, WV (US);
Randall L. Force, Charleston, WV (US);
Theodore D. Duncan, Elkview, WV (US);
George W. Schwarz, Jr., Charleston, WV (US);
Daniel W. Mosser, Hurricane, WV (US);
Donald A. Fischer, Cross Lane, WV (US);
Robert D. Olson, Charleston, WV (US);
James Leland Swecker, II, Clendenin, WV (US);
Cloid Russell Smith, III, Charleston, WV (US);
Univation Technologies, LLC, Houston, TX (US);
Abstract
Provided are systems and methods for separating a purge gas recovered from a polyethylene product. The method includes recovering a polyethylene product containing one or more volatile hydrocarbons from a polymerization reactor and contacting the polyethylene product with a purge gas to remove at least a portion of the volatile hydrocarbons to produce a polymer product having a reduced concentration of volatile hydrocarbons and a purge gas product enriched in volatile hydrocarbons. The purge gas product is compressed to a pressure of 2,500 kPaa to 10,000 kPaa, and is then cooled and separated into at least a first product, a second product, and a third product. A portion of one or more of the first, second, or third products is then recycled as a purge gas, to the polymerization reactor, or to the purge gas product enriched in volatile hydrocarbons prior to compression, respectively.