Recovery of hydrocarbons from polyalkene product purge gas

Details Recovery of hydrocarbons from polyalkene product purge gas Recovery of hydrocarbons from polyalkene product purge gas

1996-07-08

1998-04-21

Spitzer, Robert

Gas separation: processes

Compressing and indirect cooling of gaseous fluid mixture to...

And liquid contact

95176, 95177, 95184, 95192, 95237, B01D 5344

Patent

active

057413509

ABSTRACT:
Hydrocarbons are recovered from the product purge gas in an alkene polymerization process by absorption of heavier hydrocarbons from the purge gas by an intermediate hydrocarbon stream to yield a vapor rich in inert gas and alkene monomer. Alkene monomer is condensed and rectified by dephlegmation at low temperatures from the inert gas, flashed and vaporized to provide refrigeration for the condensation step, and recycled to the polymerization process. The intermediate hydrocarbon from the absorption step is recycled to the polymerization process. Optionally a portion of the inert gas is reused for purge gas.

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Fatemizadeh, A., Nolley, E., "Ethylene Recovery from Polyethylene Plant Vent Streams", American Institute of Chemical Engineers, Orlando, FL, Mar. 19-23, 1990, Paper.

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