Separation of (meth)acrylic acid from the reaction gas mixture f

Details Separation of (meth)acrylic acid from the reaction gas mixture f Separation of (meth)acrylic acid from the reaction gas mixture f

1995-10-10

1998-07-14

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5142

Patent

active

057806799

ABSTRACT:
A process for the separation of (meth)acrylic acid from the reaction gas mixture formed in the catalytic gas phase oxidation by countercurrent absorption using a high-boiling inert hydrophobic organic liquid, in which the reaction gas mixture is passed through an absorption column countercurrently to the descending high-boiling inert hydrophobic organic liquid and (meth)acrylic acid is subsequently fractionally separated from the liquid effluent leaving the absorption column and containing (meth)acrylic acid, wherein a rectifying process is superimposed on the absorption process occurring naturally in the absorption column by removing a quantity of energy from the absorption column which exceeds its natural energy loss resulting from contact with the ambient atmosphere.

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