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 REDUCING THE FORMATION OF ALKYL IODIDES AND C3-8 CARBOXYLIC ACIDS BY REMOVING PERMANGANATE REDUCING COMPOUNDS ("PRC'S") FROM THE LIGHT PHASE OF THE CONDENSED LIGHT ENDS OVERHEAD STREAM, INCLUDING (A) DISTILLING THE LIGHT PHASE TO YIELD A PRC ENRICHED OVERHEAD STREAM; AND (B) EXTRACTING THE THIRD OVERHEAD STREAM WITH WATER IN AT LEAST TWO CONSECUTIVE STAGES AND SEPARATING THEREFROM ONE OR MORE AQUEOUS STREAMS CONTAINING PRC'S.