The Dow Chemical Company

Jose Puga

A Dale Harley

George E Hartwell

David Craig Molzahn

Craig B Murchison

Mark E Jones

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.

Production of dialkyl carbonates using copper catalysts

A process for the production of a diaryl carbonate comprising:

Captive carbonyl halide process for production of diaryl carbonates

A process for the production of a diaryl carbonate useful in the preparation of polycarbonate molding resins comprising contacting an aromatic hydroxy compound and a carbonyl halide or aryl haloformate in the presence of a catalyst comprising aluminum trifluoride.

Growing community of inventors

Midland, MI, United States of America

Jose Puga