Title:
METHOD FOR PURIFYING VINYLENE CARBONATE BY COUPLED RECTIFICATION-MELT CRYSTALLIZATION TECHNOLOGY
Document Type and Number:
WIPO Patent Application WO/2023/134191
Kind Code:
A1
Abstract:
The present invention relates to the technical field of lithium battery electrolyte additives, and particularly discloses a method for purifying vinylene carbonate by coupled rectification-melt crystallization technology. The method comprises four steps: rectification, melt crystallization, sweating, and post-processing. Specifically, the method comprises: rectifying a vinylene carbonate crude product to give a vinylene carbonate secondary product with a purity greater than or equal to 90%, acquiring a vinylene carbonate crystal by means of melt crystallization and sweating, and melting the vinylene carbonate crystal by post-processing to give a purified vinylene carbonate product. Through the method provided herein for purifying vinylene carbonate by coupled rectification-melt crystallization technology, a vinylene carbonate product with high purity can be obtained.
Inventors:
ZHU GUOQING (CN)
YANG HONGJIN (CN)
LV ZHUANG (CN)
WANG HONGPING (CN)
YANG HONGJIN (CN)
LV ZHUANG (CN)
WANG HONGPING (CN)
Application Number:
PCT/CN2022/118971
Publication Date:
July 20, 2023
Filing Date:
September 15, 2022
Export Citation:
Assignee:
BEIJING THTD TECH CO LTD (CN)
International Classes:
C07D317/40
Foreign References:
| CN114507207A | 2022-05-17 | |||
| CN111072624A | 2020-04-28 | |||
| CN101175743A | 2008-05-07 | |||
| CN108864031A | 2018-11-23 | |||
| CN106905289A | 2017-06-30 | |||
| JP2002322171A | 2002-11-08 |
Other References:
SONG XIAO-LI, ZHAO HONG, LI XIAO-LEI, LIU JIN-PING : "Study on Purification of Vinylene Carbonate by Crystallization Control Method", CHINESE JOURNAL OF POWER SOURCES, JIXIE DIANZI GONGYEBU DIANYUAN QINGBAOWANG , TIANJIN, CN, vol. 37, no. 5, 31 May 2013 (2013-05-31), CN , pages 741 - 743, XP009546116, ISSN: 1002-087X
FRANKE MEIK BERNHARD ET AL.: "Design and Optimization of a Hybrid Distillation/Melt Crystallization Process", AICHE JOURNAL, vol. 54, no. 11, 6 October 2008 (2008-10-06), pages 2925 - 2942, XP071003329, DOI: 10.1002/aic.11605
FRANKE MEIK BERNHARD ET AL.: "Design and Optimization of a Hybrid Distillation/Melt Crystallization Process", AICHE JOURNAL, vol. 54, no. 11, 6 October 2008 (2008-10-06), pages 2925 - 2942, XP071003329, DOI: 10.1002/aic.11605
Attorney, Agent or Firm:
BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)
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