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Patent Searching and Data


Title:
GLYCOLIDE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/181516
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a glycolide production method capable of sufficiently increasing the rate of production of glycolide. The glycolide production method according to the present invention comprises a step for adding metal titanium to an aqueous glycolic acid solution, a step for obtaining a glycolic acid oligomer by performing dehydration polycondensation on glycolic acid contained in the aqueous glycolic acid solution to which the metal titanium has been added, and a step for obtaining glycolide by heating and depolymerizing the glycolic acid oligomer.

Inventors:
YAMAJI HARUYASU (JP)
YAMADOI YUTA (JP)
SUZUKI YOSHINORI (JP)
ONO TOSHIHIKO (JP)
Application Number:
PCT/JP2019/008921
Publication Date:
September 26, 2019
Filing Date:
March 06, 2019
Export Citation:
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Assignee:
KUREHA CORP (JP)
International Classes:
C07D319/12
Domestic Patent References:
WO2002014303A12002-02-21
Foreign References:
JP2000119269A2000-04-25
JPH09328481A1997-12-22
JPS482228B2
JPS4919117B11974-05-15
JP2015145345A2015-08-13
JP2013535433A2013-09-12
JP2000119269A2000-04-25
JP2018052293A2018-04-05
JP2018052289A2018-04-05
Other References:
See also references of EP 3770154A4
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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