Separation of (meth)acrylic acid from the reaction gas...

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

C - Chemistry, Metallurgy

07

C

C07C 57/07 (2006.01) C07C 51/47 (2006.01) C07C 51/48 (2006.01)

Patent

CA 2160215

A process for the separation of (meth)acrylic acid from the reaction gas mixtureformed in the catalytic gas phase oxidation of propylene and/or acrolein 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 liquidand (meth)acrylic acid is subsequently fractionally separated from the liquid effluent leaving the absorption column and containing (meth)acrylic acid, wherein a rectifying prozess 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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