Robert H Stodghill15807 Aberdeen Trails Dr, Houston, TX 77095

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15807 Aberdeen Trails Dr, Houston, TX 77095

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Robert Stodghill

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Independent Chemicals Professional

Location:
Houston, Texas Area
Industry:
Chemicals

Publications & IP owners

Us Patents

Absorption Process For Rejection Of Reactor Byproducts And Recovery Of Monomers From Waste Gas Streams In Olefin Polymerization Processes

US Patent:
5681908, Oct 28, 1997
Filed:
Jan 25, 1996
Appl. No.:
8/591314
Inventors:
Yuv R. Mehra - The Woodlands TX
Robert H. Stodghill - Houston TX
Assignee:
Advanced Extraction Technologies, Inc. - Houston TX
International Classification:
C08F 234
US Classification:
526 68
Abstract:
A process for rejecting reactor byproduct from the polymerization reactor in an olefins polymerization process wherein reactor waste gas stream(s) comprising unreacted monomers, reactor byproduct and light components are treated in an absorption process to additionally recover the monomers. The absorption process comprises contacting the reactor waste 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, absorbed reactor byproduct 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 and reactor byproduct which is further fractionated in a splitter column to reject the reactor byproduct as a bottoms stream. The recovered monomers from the splitter overhead can be conveyed to the reactor. In a preferred embodiment, the absorption solvent consists essentially of components derived from the reactor waste gas stream(s) so that no external solvent is required.

Gas Phase Olefin Polymerization Process With Recovery Of Monomers From Reactor Vent Gas By Absorption

US Patent:
5521264, May 28, 1996
Filed:
Aug 3, 1995
Appl. No.:
8/398349
Inventors:
Yuv R. Mehra - The Woodlands TX
Robert H. Stodghill - Houston TX
Assignee:
Advanced Extraction Technologies, Inc. - Houston TX
International Classification:
C08F 234
US Classification:
526 68
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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