METHOD OF PREPARING CYCLIC CARBONATES WITH MULTIPLE USE OF CATALYST Russian patent published in 1999 - IPC

Abstract RU 2128658 C1

FIELD: chemical industry, more particularly cyclic carbonates useful as solvents of polymers. SUBSTANCE: olefin oxide is reacted with carbon dioxide in the presence of cobalt halide and dimethylformamide at temperature of 130-150 C and pressure of 1-1.5 MPa. Catalyst-containing stillage residue is used as catalyst many times without special regeneration. EFFECT: more efficient preparation method. 2 cl, 1 dwg, 20 ex, 1 tbl

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RU 2 128 658 C1

Authors

Bobyleva L.I.

Krjukov S.I.

Il'Ina G.V.

Dates

1999-04-10—Published

1996-08-27—Filed