Title:
STANNOUS SALT COMPLEX CATALYST AND METHOD FOR PRODUCING L-LACTIDE BY USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/127163
Kind Code:
A1
Abstract:
Disclosed in the present invention are a stannous salt complex catalyst and a method for producing L-lactide by using same. The catalyst is obtained by reacting stannous salt and phosphite in a solvent. The oxidation of divalent stannous ions into tetravalent tin ions can be effectively inhibited, the conversion rate of meso-lactide is effectively reduced, the yield of L-lactide is increased, and L-lactide, the color of which is close to white, is obtained. In the crude lactide generated after a depolymerization reaction, the content of L-lactide is greater than or equal to 95%, the content of the meso-lactide is less than or equal to 3.8%, and the color of residual liquid is ensured to be close to milky white.
Inventors:
WU DI (CN)
WU PEILONG (CN)
LU YINQIU (CN)
CHEN JIANGUO (CN)
LIU XINWEI (CN)
SONG GE (CN)
CAI CHANGWANG (CN)
WU PEILONG (CN)
LU YINQIU (CN)
CHEN JIANGUO (CN)
LIU XINWEI (CN)
SONG GE (CN)
CAI CHANGWANG (CN)
Application Number:
PCT/CN2021/113174
Publication Date:
June 23, 2022
Filing Date:
August 18, 2021
Export Citation:
Assignee:
JIANGSU JINGHONG NEW MATERIALS TECH CO LTD (CN)
International Classes:
C07D319/12; B01J31/22; C07F9/142
Foreign References:
| CN112427048A | 2021-03-02 | |||
| GB2331986A | 1999-06-09 | |||
| CN101903370A | 2010-12-01 | |||
| US20090247710A1 | 2009-10-01 |
Attorney, Agent or Firm:
BEIJING FINELAND IP FIRM (CN)
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