Title:
METHOD FOR PREPARING HIGH-PURITY FLUORINATION DERIVATIVE OF ETHYLENE CARBONATE
Document Type and Number:
WIPO Patent Application WO/2023/179071
Kind Code:
A1
Abstract:
A method for preparing a high-purity fluorination derivative of ethylene carbonate. The method comprising: using chloroethylene carbonate or 4,5-dichloroethylene carbonate as a raw material and a fluoride as a fluorinating agent, subjecting same to a fluorination reaction in an alcohol or carboxylic acid protic solvent having a boiling point of ≤150ºC, wherein the reaction temperature is controlled at 30-70ºC, and the reaction time is 2-6 h; and after the reaction, purifying a crude product to obtain a high-purity fluoroethylene carbonate or 4,5-difluoroethylene carbonate. By using alcohol and carboxylic acid proton solvents, the method overcomes technical biases, improves the solubility of a metal fluoride, achieves better dissociation of F ions, and improves the fluorination efficiency; the reaction conditions are mild; the product has a high yield and a high purity; the cost of raw materials is low; the method is green and environmentally friendly; the process is simple; and industrial production can be easily realized.
Inventors:
XIE JIAWEI (CN)
TSE MAN KIN (CN)
CHEN CHIH-CHIANG (CN)
CHAN ALBERT SUN-CHI (CN)
TSE MAN KIN (CN)
CHEN CHIH-CHIANG (CN)
CHAN ALBERT SUN-CHI (CN)
Application Number:
PCT/CN2022/134653
Publication Date:
September 28, 2023
Filing Date:
November 28, 2022
Export Citation:
Assignee:
GUANGZHOU LEE & MAN TECH COMPANY LIMITED (CN)
International Classes:
C07D317/42
Domestic Patent References:
| WO2018184379A1 | 2018-10-11 |
Foreign References:
| CN114014834A | 2022-02-08 | |||
| CN110845467A | 2020-02-28 | |||
| CN106905290A | 2017-06-30 | |||
| CN114716403A | 2022-07-08 | |||
| JP2008297299A | 2008-12-11 |
Attorney, Agent or Firm:
GUANGZHOU KEYUE I.P. LAW OFFICE (CN)
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