METHOD FOR DECOMPOSING BY-PRODUCT ON PRODUCTION OF (METH)ACRYLIC ACID COMPOUNDS

Japanese Patent JP3925401

B2

PROBLEM TO BE SOLVED: To prevent the adhesion, deposition and accumulation of solid products to enable the stable maintenance of the high recovery of (meth)acrylic acid, a (meth)acrylate and an alcohol and a stable continuous operation over a long period, when Michael addition reaction products produced as by-products in a process for producing the (meth)acrylic acid and/or the (meth)acrylate are decomposed by a reaction distillation method to recover valuable products.
SOLUTION: This method for decomposing the by-products on the production of the (meth)acrylic acid compounds, comprising introducing the by-products on the production of the (meth)acrylic acid and/or the by-products on the production of the (meth)acrylate into a reactor equipped with a distillation tower to thermally decompose and simultaneously distil the by-products to recover the valuable compounds, is characterized by using a distillation tower 1 having disk and doughnut type trays 2A, 2B therein as the distillation tower.

Shuhei Yada
Kenji Takasaki
Yasuyuki Ogawa
Yoshiro Suzuki

JP2002360879A

June 06, 2007

December 12, 2002

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Mitsubishi Chemical Corporation

C07C51/353; C07C51/44; C07C57/05; C07C67/03; C07C67/08; C07C67/333; C07C67/54; C07C69/54; (IPC1-7): C07C51/353; C07C51/44; C07C57/05; C07C67/03; C07C67/08; C07C67/333; C07C67/54; C07C69/54

JP8225486A
JP9183752A
JP49055614A
JP11012222A
JP9110791A
JP2001213839A
JP2001193301A
JP2111433A

Tsuyoshi Shigeno

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