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Title:
PROCESSES FOR PRODUCTION OF ACRYLIC ACID AND/OR ESTER THEREOF AND POLYMER OF THE ACRYLIC ACID AND/OR THE ESTER
Document Type and Number:
WIPO Patent Application WO/2012/091114
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: a process for producing acrylic acid and/or an ester thereof, which can produce acrylic acid and/or an ester thereof each having a high purity steadily for a long period while preventing the clogging of a reaction tube or the deterioration in activity of a catalyst; and a process for producing a hydrophilic resin having excellent performance and excellent safety using acrylic acid and/or an ester thereof which contains little impurities as a raw material. The present invention relates to a process for producing acrylic acid and/or an ester thereof from a raw material composition containing hydroxypropionic acid and/or an ester thereof, which comprises (a) an evaporation step of vaporizing the raw material composition and (b) a dehydration step of bringing the vaporized raw material composition into contact with a dehydration catalyst, and which is characterized in that the total amount of hydroxypropionic acid and/or the ester thereof supplied to step (b) relative to 100 mass% of the total amount of hydroxypropionic acid and/or the ester thereof supplied to step (a) is adjusted to 70 mass% or more.

Inventors:
YOSHIDA HIROSHI (JP)
KAMEI HISASHI (JP)
Application Number:
PCT/JP2011/080461
Publication Date:
July 05, 2012
Filing Date:
December 28, 2011
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND (JP)
YOSHIDA HIROSHI (JP)
KAMEI HISASHI (JP)
International Classes:
C07C51/377; C07C51/43; C07C57/04; C08F2/00; C08F20/02; C12P7/40
Domestic Patent References:
WO2005095320A12005-10-13
WO2008027742A12008-03-06
WO2001016346A12001-03-08
WO2001038402A12001-05-31
WO2006034806A12006-04-06
Foreign References:
JP2010180171A2010-08-19
JP2010501526A2010-01-21
JP2008534695A2008-08-28
JPH06122707A1994-05-06
JP2005521718A2005-07-21
JPH06122707A1994-05-06
JP2008534695A2008-08-28
JP2008120796A2008-05-29
JPH05192590A1993-08-03
JPH02290255A1990-11-30
JPH09227445A1997-09-02
JP2002519402A2002-07-02
US6107358A2000-08-22
US6174978B12001-01-16
US6241928B12001-06-05
US6867269B22005-03-15
US6906159B22005-06-14
US7091253B22006-08-15
JP2009190915A2009-08-27
Other References:
See also references of EP 2660235A4
ADVANCES IN APPLIED MICROBIOLOGY, vol. 42, 1996, pages 45 - 95
ENZYME AND MICROBIAL TECHNOLOGY, vol. 26, 2000, pages 87 - 107
Attorney, Agent or Firm:
YASUTOMI & Associates (JP)
Patent business corporation Yasutomi international patent firm (JP)
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Claims: