Process for producing (meth) acrylic acid

Details Process for producing (meth) acrylic acid Process for producing (meth) acrylic acid

2008-05-06

2008-05-06

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07368602

ABSTRACT:
There is provided a process for producing (meth)acrylic acid including an absorption step of bringing a (meth)acrylic acid-containing gas obtained by a gas phase catalytic oxidation method into an absorption tower and allowing the gas to contact with an absorbent, in which absorption step a crude (meth)acrylic acid solution is withdrawn from a withdrawal outlet positioned between a supply point for the (meth)acrylic acid-containing gas and a supply point for the absorbent on the absorption tower, and then supplied to a next step. The process for producing (meth)acrylic acid makes it possible to suppress the formation of Michael adducts, thereby obtaining a (meth)acrylic acid containing solution in high yield and in high concentration.

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