Method for making organic carbonates

Details Method for making organic carbonates Method for making organic carbonates

1991-04-01

1992-08-25

Garner, Vivian

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

Organic compounds

Carbonate esters

558265, 558268, 558271, 558276, 558277, C07C 6800, C07C 6996

Patent

active

051420864

ABSTRACT:
A method for making diphenyl carbonate free of color bodies is provided by reacting an organic hydroxy compound, such as phenol with carbon monoxide and oxygen in the presence of an effective amount of a palladium catalyst, in the form of a palladium material which is used in combination with a quaternary ammonium salt, an inorganic cocatalyst, such as cobalt diacetate and an organic cocatalyst such as benzophenone or 1,10-phenanthroline. Recycling of catalyst values is also provided.

REFERENCES:
patent: 3994960 (1976-11-01), Yamazaki et al.
patent: 4096168 (1978-06-01), Hallgren
patent: 4187242 (1980-02-01), Chalk
patent: 4349485 (1982-09-01), Hallgren

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