Univation Technologies, LLC

Daniel W Mosser

Mark Williams Blood

Robert Darrell Olson

Randall L Force

George W Schwarz, Jr

James Leland Swecker, Ii

Cloid Russell Smith, Iii

Donald A Fischer

Theodore Duncan

James L Swecker

Mark W Blood

Jr George W Schwarz

Theodore D Duncan

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.

Systems and methods for recovering hydrocarbons from a polyolefin purge gas product

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Hurricane, WV, United States of America

Daniel W Mosser