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.
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Inventors:
YOSHIDA HIROSHI (JP)
KAMEI HISASHI (JP)
KAMEI HISASHI (JP)
Application Number:
PCT/JP2011/080461
Publication Date:
July 05, 2012
Filing Date:
December 28, 2011
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
YOSHIDA HIROSHI (JP)
KAMEI HISASHI (JP)
YOSHIDA HIROSHI (JP)
KAMEI HISASHI (JP)
International Classes:
C07C51/377; C07C51/43; C07C57/04; C08F2/00; C08F20/02; C12P7/40
Domestic Patent References:
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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
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)
Patent business corporation Yasutomi international patent firm (JP)
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