Texaco Chemical Inc.

Huntsman Specialty Chemicals Corporation

Michael Warren Peters

Mark A Mueller

John F Knifton

Mark E Taylor

Andrew Charles Hiester

William Pleasie Nelson

James Joseph Downs

In the continuous purification of a propylene oxide feedstock contaminated with water, methanol and acetone wherein an acetone buffer is established in the column, normal distillation conditions are maintained or restored during or after an upset by continuously monitoring predetermined distillation conditions in the acetone buffer zone, and adding additional acetone to the extractive distillation column when the monitored distillation condition deviates from a predetermined value by a predetermined amount.

Controlled continuous purification of propylene oxide by extractive

Disclosed is a method for removing organic acids and derivatives thereof from a crude methyl tertiary butyl ether (MTBE) stream of the type found in the feed to, or effluent from, a reactor for a one-step process for producing MTBE which comprises:

Neutralization of crude MTBE effluent streams using solid bases

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Gilbert, AZ, United States of America

Michael Warren Peters