Title:
GLYCOLIDE PRODUCTION WITH LOW SOLID RESIDUE
Document Type and Number:
WIPO Patent Application WO/2020/087220
Kind Code:
A1
Abstract:
The invention relates a process of preparing glycolide from a methyl glycolate oligomer. The process comprises pyrolyzing a methyl glycolate oligomer in a pyrolysis reaction system. The pyrolysis reaction system comprises no more than 1 wt%of a polyester, a polyol, a polyacid or a combination thereof, based on the total weight of the methyl glycolate oligomer in the system. Also provided is a composition comprising greater than 90 wt%of methyl glycolate and no more than 1 wt%of a combination of the polyester, the polyol, and the polyacid, based on the weight of the composition.
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Inventors:
LIU WEI (CN)
Application Number:
PCT/CN2018/112473
Publication Date:
May 07, 2020
Filing Date:
October 29, 2018
Export Citation:
Assignee:
PUJING CHEMICAL IND CO LTD (CN)
International Classes:
C08G63/02; B29B9/00; B29C49/00; C08G63/06; C08G63/08; C08G63/16; C08G63/685; C08G63/83; C08G63/84; C08G63/85; C08G63/86; C08L67/04
Domestic Patent References:
| WO2015142564A1 | 2015-09-24 | |||
| WO2014100257A2 | 2014-06-26 |
Foreign References:
| CN101054439A | 2007-10-17 | |||
| CN102181029A | 2011-09-14 | |||
| CN108192105A | 2018-06-22 |
Other References:
See also references of EP 3873965A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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