PROCESS FOR PRODUCING (METH)ACRYLIC ACID

摘要

A process for producing (meth)acrylic acid which comprises: a step in which a raw gas is caused to undergo catalytic vapor-phase oxidation in a catalytic vapor-phase oxidation reactor to produce a gas containing (meth)acrylic acid; and a step in which the (meth)acrylic acid-containing gas produced is introduced into an absorption column and a noncondensable gas is separated from the (meth)acrylic acid-containing gas to obtain a (meth)acrylic acid solution. In the process, the temperature of the (meth)acrylic acid-containing gas immediately before feeding to the absorption column is regulated to thereby stably obtain a high-concentration acrylic acid solution regardless of fluctuations in temperature of the gas discharged from the catalytic vapor-phase oxidation reactor.