311810-76-1Relevant articles and documents
4, 5-difluoroethylene carbonate and preparation method thereof
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Paragraph 0024-0032, (2020/04/02)
The invention discloses 4, 5-difluoroethylene carbonate and a preparation method thereof. The purity of the 4, 5-difluoroethylene carbonate is greater than 99.9%, and the chromaticity of the 4, 5-difluoroethylene carbonate can be less than 10 Hazen. The preparation method comprises the following steps: carrying out a chlorine substitution reaction on fluoroethylene carbonate and a chlorination reagent to obtain an intermediate 4-fluoro-5-chloroethylene carbonate; and carrying out a fluorine replacement reaction on the intermediate and a fluorination reagent to obtain the 4, 5-difluoroethylenecarbonate. The 4, 5-difluoroethylene carbonate and the preparation method thereof have the beneficial effects that the raw material consumption is reduced, the yield is high, the reaction conditions are mild, the purity is of the product improved, and the performance and the cost competitiveness of the product are improved.
METHOD FOR THE MANUFACTURE OF FLUORINATED ETHYLENE CARBONATES
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Page/Page column 12, (2011/05/06)
Difluoroethylene carbonate, trifluoroethylene carbonate and tetrafluoroethylene carbonate are synthesized from dichloroethylene carbonate, trichloroethylene carbonate and tetrachloroethylene carbonate with fluorinating agents, e.g. alkali metal fluorides, antimony fluorides and especially the HF adducts of amines. The fluorinated carbonates are suitable as additives in lithium ion batteries.
CONTINUOUS PREPARATION OF CARBONATES
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Page/Page column 10-11, (2011/04/24)
A process for the manufacture of fluoroethylene carbonate, difluoroethylene carbonate, fluoromethyl methyl carbonate and difluorinated dimethyl carbonate from ethylene carbonate and dimethyl carbonate and F2 is described wherein the fluorination process is performed continuously.