Patent ID: 8367860

Claim:
A method for producing a (meth)acrylic acid derivative selected from (meth)acrylate or a polymerized product of (meth)acrylic acid, comprising reacting (meth)acrylic acid with an alcohol or polymerizing (meth)acrylic acid using as a raw material an aqueous solution of (meth)acrylic acid without further purification to produce a (meth)acrylic acid derivative, wherein the aqueous solution of (meth)acrylic acid is formed in a production/storage step of (meth)acrylic acid and comprises at least one selected from the group consisting of: (1) a condensed water of a vapor used for a steam ejector; (2) a seal water of a vacuum pump; and (3) a water used for collecting (meth)acrylic acid in a deodorization device for collecting (meth)acrylic acid from a gas to deodorize the gas; and wherein the aqueous solution of (meth)acrylic acid and purified (meth)acrylic acid are used as the raw materials.