Patent ID: 8530699

Claim:
A process for production of (meth)acrylic acid, comprising the steps of: cooling a crude (meth)acrylic acid solution in a crystallization apparatus until the temperature of a cooling medium discharged from the crystallization apparatus is stabilized in the range of higher than the solidification point of the crude (meth)acrylic acid solution in the crystallization apparatus and not more than the solidification point plus 5° C., wherein the temperature of the cooling medium is stabilized without forming crystals of (meth)acrylic acid in the (meth)acrylic acid solution; then bringing the crude (meth)acrylic acid solution in the crystallization apparatus to a supercooled condition by setting the temperature of a cooling medium supplied to the crystallization apparatus to be lower than the solidification point of the crude (meth)acrylic acid solution by not less than 1° C., wherein the crude (meth)acrylic acid solution is brought to a supercooled condition without forming crystals of (meth)acrylic acid; and crystallizing (meth)acrylic acid from the crude (meth)acrylic acid solution.