06657078 is referenced by 215 patents and cites 4 patents.

A low energy process for producing acetic acid by the carbonylation of methanol is disclosed. The process involves a rhodium-catalyzed system operated at less than about 14% water utilizing up to 2 distillation columns. The process is preferably controlled such that the product stream has a low level of propionic acid impurity and the level of aldehyde impurities is minimized by way of aldehyde removal or minimizing aldehyde generation. The level of iodides is controlled by contacting the product, at elevated temperatures, with ion exchange resins. In preferred embodiments, at least one silver or mercury exchanged macroreticular strong acid ion exchange resin is used to purify the product. The high temperature treatment provides the added benefit of controlling the Color Value (Pt—Co units) of the product stream.

Title
Low energy carbonylation process
Application Number
9/778663
Publication Number
6657078 (B2)
Application Date
February 7, 2001
Publication Date
December 2, 2003
Inventor
Jerry A Broussard
Corpus Christi
TX, US
G Paull Torrence
Corpus Christi
TX, US
George A Blay
Corpus Christi
TX, US
Mark O Scates
Friendswood
TX, US
Agent
James J Mullen
US
Assignee
Celanese International Corporation
TX, US
IPC
C07C 51/12
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