REMOVAL OF PERMANGANATE REDUCING COMPOUNDS FROM METHANOL CARBONYLATION PROCESS STREAM

摘要

An improvement of the methanol carbonylation process for manufacturing acetic
acid is disclosed. Specifically disclosed is a method for removing
permanganate reducing compounds ("PRC''s") from the condensed light ends
overhead stream, including (a) distilling at least a portion of the condensed
light ends overhead to yield a PRC enriched second overhead stream; (b)
extracting the second overhead stream with water and separating therefrom an
aqueous stream containing PRC''s; and (c) returning at least a portion of the
extracted second overhead to the second distiller.