Process for the preparation of aryl carbonates

Details Process for the preparation of aryl carbonates Process for the preparation of aryl carbonates

1995-06-23

1997-02-11

Richter, Johann

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

Organic compounds

Carbonate esters

C07C 6802, C07C 6996

Patent

active

056022719

ABSTRACT:
Carbonates with aromatic ester groups are prepared by reaction of aromatic monohydroxy compounds with phosgene or with chloroformic acid esters of aromatic monohydroxy compounds, whereby operations are carried out at a temperature in the range of 50.degree. to 450.degree. C. and at a pressure in the range of 0.05 to 20 bar in the presence of metallates of the elements of groups IIIa, IVa, Va, VIa, IIIb, IVb, Vb, VIb, VIIb, and VIII of the Mendeleev periodic system as heterogeneous catalysts.

REFERENCES:
patent: 2362865 (1944-11-01), Tryon et al.
patent: 2837555 (1958-06-01), Lee
patent: 3234263 (1966-02-01), Kurkley et al.
patent: 5239105 (1993-08-01), Pews et al.
patent: 5288474 (1994-02-01), Reichert et al.

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