(Meth) acrylic acid composition and method for producing the same

摘要

The present invention removes impurities inhibiting storage stability of (meth)acrylic acid or stability in polymerization of (meth)acrylic acid when (meth)acrylic acid is used as a raw material, to thereby stabilize (meth)acrylic acid. A total concentration of aromatic hydrocarbons each having 8 to 10 carbon atoms in a (meth)acrylic acid composition is controlled to less than 2 ppm. The (meth)acrylic acid composition can be obtained by crystallizing (meth)acrylic acid from a crude (meth)acrylic acid composition containing the aromatic hydrocarbons, sweating the crystallized (meth)acrylic acid, and separating the (meth)acrylic acid remained as a crystal after the sweating.