Process for working up the liquid reaction products from the...

Details Process for working up the liquid reaction products from the... Process for working up the liquid reaction products from the...

C - Chemistry, Metallurgy

07

C

C07C 69/96 (2006.01) C07C 68/00 (2006.01) C07C 68/08 (2006.01)

Patent

CA 2136289

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 distilla- tive working-up in the second column, which is predominantly composed of methanol, is recycled to the reaction process.

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