Process for removal of diol as impurity in cyclic carbonic acid

Details Process for removal of diol as impurity in cyclic carbonic acid Process for removal of diol as impurity in cyclic carbonic acid

1996-03-29

1999-07-13

Stockton, Laura L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549230, C07D31736, C07D31906

Patent

active

059228881

ABSTRACT:
A process for removing a diol from a cyclic carbonic acid ester containing the diol as an impurity, which comprises bringing a cyclic carbonic acid ester containing a diol as an impurity into contact with a synthetic zeolite in the presence of a chain carbonic acid ester. According to this process, there can be obtained a mixture of a cyclic carbonic acid ester and a chain carbonic acid ester having a very small content of diol, which is suitable as a solvent for electrolytic solution of a condenser, cell or battery.

REFERENCES:
patent: 3846450 (1974-11-01), Stalker et al.
patent: 5091543 (1992-02-01), Grey
patent: 5436362 (1995-07-01), Kondoh et al.
XP 000576836, pp. 19-24, 1982.

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