Production of dialkyl carbonates using copper catalysts

Details Production of dialkyl carbonates using copper catalysts Production of dialkyl carbonates using copper catalysts

1993-12-10

1995-02-07

Lee, Mary C.

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

Organic compounds

Carbonate esters

502164, C07C 6996, B01J 3118

Patent

active

053877080

ABSTRACT:
A process for the production of dialkyl carbonates, such as dimethyl carbonate. In one aspect, the process involves contacting under reaction conditions an alkanol, such as methanol, with carbon monoxide and oxygen in the vapor phase and in the presence of a catalyst containing (1) a copper halide, a copper oxyhalide, or a copper carboxylate halide, (2) a quaternary ammonium salt, and (3) a support component. The catalyst achieves high selectivity and productivity to dialkyl carbonates. In a second aspect, the addition of a chlorocarbon catalyst regenerator to the alkanol feed increases catalyst stability and lifetime and increases the selectivity and/or productivity to dialkyl carbonates.

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