Process for the preparation of cyclic carbonates

Details Process for the preparation of cyclic carbonates Process for the preparation of cyclic carbonates

2008-04-29

2008-04-29

McKane, Joseph K. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S229000, C502S124000

Reexamination Certificate

active

10671869

ABSTRACT:
The present invention provides an improved process for the preparation of cyclic carbonates which comprises reacting an olefins or its epoxide with carbon dioxide or a mixture of oxygen-containing compound and carbon dioxide, in the presence of zeolite-based catalyst and a Lewis base co-catalyst, at a minimum pressure of 30 psig and temperature between 40 to 120° C. for 0.5 to 4 hrs., separating the catalyst and recovering the corresponding cyclic carbonate formed by conventional methods.

REFERENCES:
patent: 6407264 (2002-06-01), Kim et al.
Sabater t al. Chem. Commun., 1997, pp. 1285-1286.

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