Claims
- 1. A process for producing a vinylene carbonate comprising dehydrochlorinating chloroethylene carbonate in the presence of an amine in a high boiling point solvent having a boiling point of 170 to 300° C. and selected from the group consisting of carbonates, carboxylic esters and hydrocarbons.
- 2. A process for producing a vinylene carbonate as claimed in claim 1, wherein said carbonates comprise dibutyl carbonate, diisobutyl carbonate, dipentyl carbonate, dihexyl carbonate, dicyclohexyl carbonate, propylene carbonate, butylene carbonate and 1,2-methoxycarbonyl oxyethane.
- 3. A process for producing a vinylene carbonate as claimed in claim 1, wherein said carboxylic esters comprise octyl acetate, phenyl acetate, benzyl acetate, cyclohexyl acetate, hexyl propionate, phenyl propionate, methyl benzoate, ethyl benzoate, methyl phenylacetate, dimethyl adipate, diethyl malonate, dimethyl phthalate, ethyleneglycol diacetate, ε-caprolactone and γ-butyrolactone.
- 4. A process for producing a vinylene carbonate as claimed in claim 1, wherein said hydrocarbons comprise butylbenzene, sec-butylbenzene, cymene, diethylbenzene and 1-phenylhexane.
- 5. A process for producing a vinylene carbonate as claimed in claim 1, wherein said amine comprises triethylamine.
- 6. A process for producing a vinylene carbonate as claimed in claim 1, wherein said vinylene carbonate, after the dehydrochlorination, is distilled off by distillation prior to distillation of the high boiling point solvent.
- 7. A process for producing a vinylene carbonate as claimed in claim 1, wherein an amine hydrochloride formed in the process is first removed after the dehydrochlorination and then resultant vinylene carbonate is distilled off prior to distillation of the high boiling point solvent.
Priority Claims (2)
Number |
Date |
Country |
Kind |
10-241388 |
Aug 1998 |
JP |
|
11-55210 |
Mar 1999 |
JP |
|
REFERENCE TO RELATED APPLICATION
This application is a divisional of U.S. patent application Ser. No. 09/458,274 filed on Dec. 9, 1999 now U.S. Pat. No. 6,413,678, which is incorporated herein by reference in its entirety.
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Non-Patent Literature Citations (1)
Entry |
Newman et al., J. Am. Chem. Soc., vol. 75, pp. 1263-1264. |