Continuous process for preparing di-alkyl carbonates

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbonate esters

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C07C 6800, C07C 6996

Patent

active

051590999

ABSTRACT:
A continuous process is described for preparing a di-alkyl carbonate, e.g. dimethylcarbonate, via oxidative carbonylation of the corresponding alkanol, e.g. methanol, in the presence of a catalyst system containing a copper alkoxy-halide and water with a mole ratio of the water to the copper salt of between 0.25 and 2.0 and preferably between 0.5 and 1. In this manner extremely high di-alkyl carbonate formation rates are obtained.

REFERENCES:
patent: 4360477 (1982-11-01), Hallgren et al.
patent: 4761467 (1988-08-01), Bhattacharya
patent: 4785130 (1988-11-01), Bhattacharya

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