Title:
METHOD FOR PURIFYING (METH)ACRYLIC ACID AND METHOD FOR PRODUCING (METH)ACRYLIC ESTER
Document Type and Number:
WIPO Patent Application WO/2005/061428
Kind Code:
A1
Abstract:
A method is provided for purifying (meth)acrylic acid, in which a transition metal component is removed with good efficiency from a crude (meth)acrylic acid containing the transition metal component as an impurity. In removing a transition metal component by contacting a crude (meth)acrylic acid containing the transition metal component as an impurity with a cation exchange resin, water is added to said crude (meth)acrylic acid prior to the contact of the crude (meth)acrylic acid with the cation exchange resin. In a preferred embodiment, the transition metal component is manganese.
Inventors:
YADA SHUHEI (JP)
TAKASAKI KENJI (JP)
OGAWA YASUSHI (JP)
SUZUKI YOSHIRO (JP)
TAKASAKI KENJI (JP)
OGAWA YASUSHI (JP)
SUZUKI YOSHIRO (JP)
Application Number:
PCT/JP2004/014593
Publication Date:
July 07, 2005
Filing Date:
October 04, 2004
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
YADA SHUHEI (JP)
TAKASAKI KENJI (JP)
OGAWA YASUSHI (JP)
SUZUKI YOSHIRO (JP)
YADA SHUHEI (JP)
TAKASAKI KENJI (JP)
OGAWA YASUSHI (JP)
SUZUKI YOSHIRO (JP)
International Classes:
C07B61/00; C07C51/42; C07C51/47; C07C57/07; C07C67/08; C07C67/56; C07C69/54; (IPC1-7): C07C51/47; C07C57/07; C07C67/08; C07C69/54
Foreign References:
| JPH1160536A | 1999-03-02 | |||
| JPH09124551A | 1997-05-13 |
Other References:
See also references of EP 1726578A4
Attorney, Agent or Firm:
Okada, Kazuhiko (6F Kudan Kangyo Bldg., 10-1, Kudan-Kita 1-chom, Chiyoda-ku Tokyo, JP)
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