Process for continuously producing dimethyl carbonate

Details Process for continuously producing dimethyl carbonate Process for continuously producing dimethyl carbonate

1996-05-09

1997-05-20

Richter, Johann

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

Organic compounds

Carbonate esters

C07C 6800

Patent

active

056313969

ABSTRACT:
Dimethyl carbonate ((CH.sub.3 O).sub.2 CO) is continuously produced by a catalytic reaction (first step) of CO with CH.sub.3 NO.sub.2, with a significantly reduced loss of CH.sub.3 ONO by the process including a second step wherein (CH.sub.3 O).sub.2 CO in a reaction product gas of the first step is absorbed by dimethyl oxalate while contacting the resultant liquid fraction with CO to recover CH.sub.3 ONO, a third step wherein CH.sub.3 ONO is regenerated from NO in the condensed gas fraction produced in the second step and molecular oxygen and CH.sub.3 OH introduced into the third step, the resultant regenerated gas fraction being recycled and reused as a feed gas for the first step, and a fourth step wherein (CH.sub.3 O).sub.2 CO contained in the liquid fraction of the second step is collected.

REFERENCES:
patent: 5162563 (1992-11-01), Nishihira et al.
patent: 5214185 (1993-05-01), Nishihira et al.

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