General Electric Company

Subramaniam Radhakrishnan

Raghunath Vitthal Chaudhari

Ashutosh Anant Kelkar

Sunil Purushottam Gupte

Subbareddiar Kanagasabapathy

Diaryl carbonates such as diphenyl carbonate are prepared by reaction of hydroxyaromatic compounds such as phenol with oxygen and carbon monoxide in the presence of a catalyst composition comprising a Group VIIIB metal such as palladium or a compound thereof, a bromide source such as a quaternary ammonium or hexaalkylguanidinium bromide and a polyaniline in partially oxidized and partially reduced form. The polyaniline is preferably halide-doped and in the form of a blend with a binder polymer containing ether or ester groups and a complex-forming salt.

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Pune, India

Subramaniam Radhakrishnan