Apparatus and method for recovering of carboxylic acid and removing of water from reactor emission in the oxidation process of aromatic compound by using energy contributing combined distillation

摘要

The present invention relates to a method for separating water, which is a reaction product, from a reactor discharge during the oxidation of an aromatic compound, and recovering a carboxylic acid used as a solvent in the reactor. From the reactor discharge during the oxidation reaction of aromatic compounds, in which two or more operating pressures are introduced into a dehydration tower with different operating pressures, and condenser of one dehydration tower serves as a reboiler of another dehydration tower, which significantly reduces energy consumption. Phosphorus water relates to a process for separating minutes and recovering carboxylic acid used as solvent in the reactor.