Process for purification of (meth)acrylic acid

摘要

A process for purification of (meth)acrylic acid which comprises adding to a crude (meth)acrylic acid one or two or more polar organic substances as a second component at a concentration of 1-35% by weight, crystallizing (meth)acrylic acid from the resulting (meth)acrylic acid solution, and separating the precipitated crystal of (meth)acrylic acid and a mother liquor from each other.