METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID

Abstract: a method for preparing (meth)acrylic acid, including: bringing a mixed gas including (meth)acrylic acid into contact with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; bringing the (meth)acrylic acid aqueous solution into contact with an extraction solvent in an extraction column to obtain an extract solution including the (meth)acrylic acid and extraction solvent; supplying the extract solution to a solvent purification column and separating the extract solution into a solvent-purification-column lower discharge stream and a solvent-purification-column upper discharge stream; supplying the solvent-purification-column lower discharge stream to a crystallizer and obtaining crystallized (meth)acrylic acid in the crystallizer; and supplying the mother liquor after the crystallization to a high boiling point by-product separation tower, and circulating a high boiling point by-product separation tower upper discharge stream from which the high boiling point by-product has been removed to the solvent purification tower.

Inventor(s): Sung Jin Yoo, Kyung Soo Jang, Sung Kyu Lee

CPC Classification: C07C51/48 (ACYCLIC OR CARBOCYCLIC COMPOUNDS)

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