Title:
METHOD FOR PURIFYING (METH)ACRYLIC ACID MONOMER AND/OR (METH)ACRYLIC ACID ESTER MONOMER
Document Type and Number:
WIPO Patent Application WO/2023/181926
Kind Code:
A1
Abstract:
One embodiment of the present invention provides a method for purifying a (meth)acrylic acid monomer and/or a (meth)acrylic acid ester monomer, the method comprising purification of a composition that contains a (meth)acrylic acid monomer and/or a (meth)acrylic acid ester monomer by means of distillation. With respect to this method for purifying a (meth)acrylic acid monomer and/or a (meth)acrylic acid ester monomer, oxygen is supplied from the start to the end of the distillation so that the molar ratio of the oxygen to the vapor derived from the (meth)acrylic acid monomer and/or the (meth)acrylic acid ester monomer in the vapor phase component in a distillation still is maintained at 1.50 × 10-3 or more.
Inventors:
YURI MICHIHIRO (JP)
SUZUKI KOUJI (JP)
YAMAGUCHI YU (JP)
SUGITA MASAKI (JP)
SUGANO YUUICHI (JP)
SUZUKI KOUJI (JP)
YAMAGUCHI YU (JP)
SUGITA MASAKI (JP)
SUGANO YUUICHI (JP)
Application Number:
PCT/JP2023/008707
Publication Date:
September 28, 2023
Filing Date:
March 08, 2023
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C07C67/54; C07C69/54; C07D303/16
Domestic Patent References:
| WO2005102984A1 | 2005-11-03 |
Foreign References:
| JP2005232008A | 2005-09-02 | |||
| JP2005179352A | 2005-07-07 | |||
| JP2004513089A | 2004-04-30 | |||
| JP2000300901A | 2000-10-31 | |||
| JP2001114705A | 2001-04-24 |
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
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