Patent ID: 8637698
Filing Date: 2014-01-28
Classification: C07C

Abstract:
1. A carbonylation method of producing acetic acid comprising the steps of: reacting carbon monoxide with at least one reactant in a reactor containing a reaction medium to produce a reaction product comprising acetic acid, wherein the at least one reactant is selected from the group consisting of methanol, methyl acetate, methyl formate, dimethyl ether and mixtures thereof, and wherein the reaction medium comprises water, a halogen promoter, and a catalyst, separating the reaction product in a flasher to produce a crude product stream and a liquid recycle stream; purifying the crude product stream in a light ends column to produce a purified product stream; drying a first portion of the purified product stream in a first drying column; and drying a second portion of the purified product stream in a second drying column.