Patent ID: 9149735
Filing Date: 2015-10-06
Classification: B01D,C07C

Abstract:
1. A process for removing permanganate reducing compounds (PRC's) from a crude acetic acid composition comprising acetic acid and one or more PRC's, the process comprising the steps of: (a) separating the crude acetic acid composition in a light ends column into a PRC enriched stream and an acetic acid stream; (b) separating the PRC enriched stream into an aqueous phase and an organic phase; (c) refluxing a portion of the aqueous phase to the light ends column; (d) separating another portion of the aqueous phase in a distillation column into an overhead stream and a bottoms stream; and (e) directing a first return stream comprising at least a portion of the bottoms stream to the reflux of the light ends column.