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Recovery of olefin monomers

United States Patent

March 16, 2004
View the Complete Patent at the US Patent & Trademark Office
In a process for the production of a polyolefin, an olefin monomer is polymerised said polyolefin and residual monomer is recovered. A gas stream comprising the monomer and nitrogen is subjected to a PSA process in which said monomer is adsorbed on a periodically regenerated silica gel or alumina adsorbent to recover a purified gas stream containing said olefin and a nitrogen rich stream containing no less than 99% nitrogen and containing no less than 50% of the nitrogen content of the gas feed to the PSA process.
Golden; Timothy Christopher (Allentown, PA), Weist, Jr.; Edward Landis (Macungie, PA), Johnson; Charles Henry (Coplay, PA)
Air Products and Chemicals, Inc. (Allentown, PA)
10/ 385,947
March 11, 2003
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under Contract No. DE-FC07-00CH110022 between Air Products and Chemicals, Inc. and the US Department of Energy. The Government has certain rights to this invention.