USE OF PHOSPHATE SALTS IN THE PRODUCTION OF CARBOXYLIC ACIDS

摘要

The use of a metal phosphate compound in a transition metal catalyzed carbonylation reaction to increase the rate of carbonylation reaction is provided. In some aspects, the metal phosphate compound is used in conjunction with a rhodium catalyzed carbonylation process for producing glacial acetic acid including a carbonylation method which comprises LiI.

主权项

1. A method comprising reacting methanol with carbon monoxide in a reaction mixture in the presence of:
(A) a rhodium compound; (B) an iodide containing compound; (C) a metal iodide salt; and (D) a phosphate of the formula:
MxHyPO4   (I) wherein:
M is a metal cation;x is 0, 1, or 2; andy is an integer equal to 3−x; under conditions sufficient to cause carbonylation of methanol to form acetic acid.