Patent ID: 6825381
Filing Date: 2004-11-30
Classification: B01D,B27N,C07C

Abstract:
A method for absorbing (meth)acrylic acid, produced by a manufacturing process employing a catalytic gas-phase oxidation reaction, which method comprises introducing (meth)acrylic acid-containing gas, produced by the manufacturing process, into an absorption column, containing an absorbent comprising water as the main component, to absorb (meth)acrylic acid and form a solution of (meth)acrylic acid, discharging the solution of (meth)acrylic acid from a bottom portion of the absorbent column, and exhausting a water-containing gas from a top portion of the absorption column; wherein the concentration of (meth)acrylic acid in the solution discharged from the bottom portion of the absorbent column is controlled by changing the amount of water contained in the gas exhausted from the top portion of the absorption column.