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AssigneeAdvanced Extraction Technologies, Inc.
InventorsYuv R. Mehra, Robert H. Stodghill
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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.
A process for recovering unreacted monomers in a gas phase olefin polymerization process, wherein vent gas stream(s) from the reactor purge or product purge tanks, said vent gas comprising inert light components and unreacted monomers, are treated in a process comprising the steps of:
A process for recovering unreacted monomers in a gas phase olefin polymerization process, wherein vent gas stream(s) from the reactor purge or product purge tanks, said vent gas comprising inert light components, unreacted monomers and heavy hydrocarbons, are treated in a process comprising the steps of:
Dependencies are inferred from the claim text.