Patent ID: 6340777
Filing Date: 2002-01-22
Classification: C07C

Abstract:
A method for purifying acetone, comprising: distilling a crude acetone-phenol mixture by feeding the mixture to a first rectification column for separating low-boiling impurities; removing remaining constituents of the mixture from the bottom of the first column; and feeding the remaining constiuents to a second rectification column for separating high-boiling impurities wherein an alkaline agent and an oxidizing agent are both added to the remaining constituents in the second column or any point upstream, and wherein a ratio of the alkaline agent to the oxidizing agent is from 1:0.1 to 1:100, and the oxidizing agent is supplied at a rate of 0.5-50 grams per liter of the remaining constituents, thereby producing a purified acetone having a permanganate time of at least five hours.