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Title:
PRODUCTION OF (METH)ACRYLIC ACID
Document Type and Number:
Japanese Patent JP2000351749
Kind Code:
A
Abstract:

To improve the yield of the product (meth)acrylic acid and simultaneously eliminate environmental pollution by efficiently recovering the (meth) acrylic acid in a vent gas discharged from a purifying step when producing the (meth)acrylic acid.

This method for producing (meth)acrylic acid comprises condensing and circulating the (meth)acrylic acid in a vent gas at the time of circulating the (meth)acrylic acid in the vent gas generated in a purifying step of a process for producing the (meth)acrylic acid through a collecting step or thereafter when producing the (meth)acrylic acid comprising the process composed of a reactional step, the collecting step and the purifying step. The generated vent gas is discharged from a vacuum producing apparatus and the generated vent gas is discharged from an apparatus operated under atmospheric pressure.


Inventors:
NISHIMURA TAKESHI
MATSUMOTO YUKIHIRO
Application Number:
JP16323399A
Publication Date:
December 19, 2000
Filing Date:
June 10, 1999
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND
International Classes:
C07C51/42; B01D3/00; B01D3/14; B01D53/14; C07C51/25; C07C51/44; C07C57/05; C07C57/07; (IPC1-7): C07C51/42; C07C57/05; C07C57/07