Gas phase olefin polymerization process with recovery of monomer

Details Gas phase olefin polymerization process with recovery of monomer Gas phase olefin polymerization process with recovery of monomer

1995-08-03

1996-05-28

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Removing and recycling removed material from an ongoing...

526 69, 526 70, 526901, 95143, 95237, 95240, 95238, C08F 234

Patent

active

055212646

ABSTRACT:
A process for gas phase polymerization of olefins wherein reactor vent gas stream(s) comprising unreacted monomers and light components are treated in an absorption process to recover the monomers. The absorption process comprises contacting the reactor vent gas stream(s) with an absorption solvent in an absorption zone to produce a gas stream comprising the light components, and a liquid stream comprising the absorption solvent and absorbed monomers. The liquid stream is fractionated in a distillation column to produce a distillation column bottoms stream that is the absorption solvent which is conveyed to the absorption zone, and an overhead stream comprising the monomers which can be conveyed to the reactor. In a preferred embodiment, the absorption solvent consists essentially of components derived from the reactor vent gas stream(s) so that no external solvent is required.

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