Process for the continuous preparation of dialkyl carbonates

Details Process for the continuous preparation of dialkyl carbonates Process for the continuous preparation of dialkyl carbonates

1993-05-10

1994-10-25

Ramsuer, Robert W.

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

Organic compounds

Carbonate esters

203DIG6, C07C 6996

Patent

active

053591186

ABSTRACT:
Di-(C.sub.1 -C.sub.4 -alkyl) carbonates can be prepared by catalysed counter-current reesterification of ethylene glycol carbonate or propylene glycol carbonate with a C.sub.1 -C.sub.4 -alcohol in a column, ethylene glycol carbonate or propylene glycol carbonate being introduced into the upper part of the column and a dialkyl carbonate-containing C.sub.1 -C.sub.4 -alcohol being introduced into the central or lower part of the column and pure alcohol being additionally introduced below the introduction of the dialkyl carbonate-containing alcohol.

REFERENCES:
patent: 4181676 (1980-01-01), Buysch et al.
patent: 4307032 (1981-12-01), Krimm et al.
patent: 4691041 (1987-09-01), Duranleau et al.
patent: 5231212 (1993-07-01), Buysch et al.

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