Process for the production of diaryl carbonates

Details Process for the production of diaryl carbonates Process for the production of diaryl carbonates

1996-06-10

1997-04-29

Richter, Johann

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

Organic compounds

Carbonate esters

C07C 6800

Patent

active

056250916

ABSTRACT:
In a new process for the production of aromatic carbonates from aromatic hydroxy compound, CO and O.sub.2 in contact with a platinum-group metal catalyst, a co-catalyst, a quaternary salt and a base at elevated temperature and elevated pressure, an improvement is achieved if the reaction water is removed continuously from a partial flow of the reaction under reduced pressure and largely isothermal conditions and the dehydrated partial flow is again supplied to the reaction.

REFERENCES:
patent: 5498742 (1996-03-01), Buysch et al.
Derwent Abstract No. 78-29026A (1978), Derwent Information Ltd (London, England); DE 2738437, published Apr. 13, 1978.
Derwent Abstract No. 92-354379 (1992), Derwent Information Ltd. (London England); JP 04-257546, published Sep. 11, 1992.
Derwent Abstract No. 92-360705 (1992), Derwent Information Ltd. (London, England); JP 04-261142, published Sep. 17, 1992.

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