Process for the continuous preparation of diaryl carbonates

Details Process for the continuous preparation of diaryl carbonates Process for the continuous preparation of diaryl carbonates

1995-01-27

1996-03-12

Richter, Johann

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

Organic compounds

Carbonate esters

558271, C07C 6800

Patent

active

054987423

ABSTRACT:
The invention relates to a process for the continuous preparation of diaryl carbonates by reaction of an aromatic hydroxyl compound with carbon monoxide and oxygen in the presence of a catalyst containing a noble metal of group VIIIb of the Periodic Table of the Elements, a quaternary salt, a cocatalyst and a base. The catalyst is activated by treatment with carbon monoxide in the liquid phase. The reaction water is removed by excess reaction gas.

REFERENCES:
patent: 4201721 (1980-05-01), Hallgren
Derwent Chemical Abstract, Abstract No. JP04257546-A, Week 9243 (1992).
Derwent Chemical Abstract, Abstract No. JP04261142-A, Week 9244 (1992).

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