Process for working up the liquid reaction products from the cu-

Details Process for working up the liquid reaction products from the cu- Process for working up the liquid reaction products from the cu-

1994-11-17

1996-08-27

Geist, Gary

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

Organic compounds

Carbonate esters

558 26, C07C 6996

Patent

active

055502784

ABSTRACT:
A process is described for working up liquid reaction mixtures such as are formed during dimethyl carbonate preparation by oxidative carbonylation of methanol in the presence of a copper-containing catalyst, which process permits a simple separation of the water of reaction from the dimethyl carbonate. In this process, in a first distillation column, the water of reaction is taken from the bottom of the column; the top product from the first column is separated in a second column, under increased pressure, into dimethyl carbonate as bottom product and into a top product which is predominantly composed of methanol. The top product from the distillative working-up in the second column, which is predominantly composed of methanol, is recycled to the reaction process.

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