Exxonmobil Chemical Patents Inc.

Ralph Howard Schatz

Kenneth W Powers

Robert Norman Webb

Michael F McDonald, Jr

Michael F Mcdonald

David Y Chung

Timothy Daniel Shaffer

Pamela Jean Wright

Michael Francis McDonald

Richard Dwight Hembree

Andrew B Donnalley

Claude André Gautier

Richard E Baud

Claude A Gautier

Scott T Milner

Jean-Pierre Courseaux

The invention relates to methods for separating mixture components such as reactor effluent components. In particular, the invention relates to the use of an extractive agent such as a hydrocarbon in an extractive distillation process to separate monomers such as a C-Cisoolefins such as isobutylene from mixtures such as reactor effluents including one or more hydrofluorocarbon(s) (HFC).

Processes utilizing extractive distillation

The invention relates to a new catalyst system that improves the heat transfer capability of a butyl reactor slurry process system in the production of random copolymers of one or more isoolefin monomers and one or more conjugated diene monomers in continuous slurry polymerization processes. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar diluent along with a Lewis acid and a Cor greater initiator having a tertiary halide.

Process for polymerizing cationically polymerizable monomers

The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce random copolymers using the improved catalyst system. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar solvent along with a Lewis acid and a stabilizing initiator.

Production of polyisobutylene copolymers

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Dillon, CO, United States of America

Ralph Howard Schatz