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US 9,517,997 B2Granted
Process for continuous recovering (meth)acrylic acid and apparatus for the process
AssigneeLG Chem, Ltd.
InventorsSe-Won Baek, Jong-Hun Song, Sul-Hee Yoo
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Abstract
This disclosure relates to a method of continuous recovery of (meth)acrylic acid and an apparatus used for the continuous recovery method. The continuous recovery method of (meth)acrylic acid according to the present invention may maintain a recovery rate of (meth)acrylic acid equivalent to that of the previous recovery method, and yet may significantly reduce energy consumption, and may minimize polymerization of (meth)acrylic acid in the recovery process, thus providing more improved operation stability.
Claims18
A method of continuous recovery of (meth)acrylic acid, comprising:
- contacting a mixed gas comprising (meth)acrylic acid, organic by-products, and vapor, which is produced by a synthesis reaction of (meth)acrylic acid, with water in a (meth)acrylic acid absorption tower (100) to obtain a (meth)acrylic acid aqueous solution;
- dividing and feeding the (meth)acrylic acid aqueous solution to a (meth)acrylic acid extraction tower (200) and a water separation tower (300);
- obtaining a (meth)acrylic acid extract with reduced water content from the (meth)acrylic acid aqueous solution that is fed to the (meth)acrylic acid extraction tower (200), and feeding it to a water separation tower (300);
- and
- distilling the (meth)acrylic acid aqueous solution and the (meth)acrylic acid extract that are fed to the water separation tower (300) to obtain (meth)acrylic acid.
2 more elements
Dependencies are inferred from the claim text.