Process for preparing dialkyl carbonates

Details Process for preparing dialkyl carbonates Process for preparing dialkyl carbonates

1994-12-29

1996-07-09

Richter, Johann

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

Organic compounds

Carbonate esters

C07C 6800

Patent

active

055346499

ABSTRACT:
This invention relates to a process for preparing dialkyl carbonates by the reaction of one kind or a mixture of two or more kinds selected from urea, methyl carbamate and ethyl carbamate with methanol and/or ethanol in the presence of a catalyst under pressure at 100.degree. to 250.degree. C. and the process does not use poisonous phosgene or carbon monoxide as raw material and readily yields dimethyl carbonate and diethyl carbonate in simple equipment.

REFERENCES:
patent: 2834799 (1958-05-01), Sowa
patent: 4327035 (1982-04-01), Heitz et al.
patent: 4331610 (1982-05-01), Heitz et al.
patent: 4436668 (1984-03-01), Harder et al.
English Language Abstract of Japanese Patent No. 4-270249 (A)(1992).
English Language Abstract of Japanese Patent No. 59-3463 (1984).
English Language Abstract of Japanese Patent No. 54-41820 (1979).
English Language Abstract of Japanese Patent No. 2-212456 (A)(1990).

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