Title:
METHOD FOR SYNTHESIZING METHYLENE DISULFONATE COMPOUND
Document Type and Number:
WIPO Patent Application WO/2019/095245
Kind Code:
A1
Abstract:
The present invention discloses a method for synthesizing a methylene disulfonate compound, which is related to the technical field of battery electrolyte additives. The methylene disulfonate compound is synthesized by reacting an alkanedisulfonic acid with a formaldehyde compound in the presence of a dehydrating agent. The dehydrating agent is a neutral dehydrating agent. The alkanedisulfonic acid is a sulfonic acid compound represented by formula I. The molar ratio of the formaldehyde compound to the alkanedisulfonic acid is ≥1, in which R1 and R2 are independently a hydrogen atom, a C1-C4 alkyl optionally substituted with a halogen atom, n is an integer from 1 to 4, and when n is an integer from 2 to 4, n instances of R1 and n instances of R2 may be the same or different. The synthesis method of the present invention is simple and high in yield. The product has a high purity, low moisture content, and low acid value. The product can drastically increase the performance of a battery electrolyte.
Inventors:
ZHANG MIN (CN)
LIU PENG (CN)
WANG JUN (CN)
LIU PENG (CN)
WANG JUN (CN)
Application Number:
PCT/CN2017/111504
Publication Date:
May 23, 2019
Filing Date:
November 17, 2017
Export Citation:
Assignee:
SHIJIAZHUANG SAN TAI CHEMICAL CO LTD (CN)
International Classes:
C07D327/00
Foreign References:
| CN107098882A | 2017-08-29 | |||
| CN101426776A | 2009-05-06 |
Attorney, Agent or Firm:
SHIJIAZHUANG YUAN HUI PATENT AGENT FIRM (SPECIAL ORDINARY PARTNERSHIP) (CN)
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