18708329. METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID (LG Chem, Ltd.)
METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID
Organization Name
Inventor(s)
Kyung Soo Jang of Daejeon (KR)
METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID
This abstract first appeared for US patent application 18708329 titled 'METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID
Original Abstract Submitted
A method for preparing a (meth)acrylic acid, the method including: bringing a mixed gas containing (meth)acrylic acid into contact with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; supplying the (meth)acrylic acid aqueous solution to a crystallizer, performing crystallization to obtain purified (meth)acrylic acid, and supplying a mother liquor separated from the purified (meth)acrylic acid to a water separation column; separating, in the water separation column, an upper discharge stream containing water and a lower discharge stream containing (meth)acrylic acid and high-boiling by-products; and supplying the lower discharge stream of the water separation column to a high boiling point by-product separation column, and supplying an upper discharge stream of the high-boiling point by-product separation column containing (meth)acrylic acid to the crystallizer.