METHOD FOR MANUFACTURING CARBOXYLIC ACID

摘要

Provided are a method and device for manufacturing high-purity carboxylic acid from which a high percentage of metal-containing impurities and/or carbonyl-containing impurities have been removed. In this method for manufacturing carboxylic acid, a stream of carboxylic acid that contains metal-containing impurities is supplied to a first flash system (1) and vaporized. The vaporized fraction is then supplied to a distillation system (5) and separated into the following: a stream that consists primarily of carboxylic acid; and a fraction that contains high-volatility impurities (or low-boiling-point impurities). The stream that consists primarily of carboxylic acid is further supplied to a second flash system (10) or an adsorption system and purified carboxylic acid is collected.