Process for the preparation of urethanes

Details Process for the preparation of urethanes Process for the preparation of urethanes

C - Chemistry, Metallurgy

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C08G 71/04 (2006.01) A01N 47/10 (2006.01) B01J 23/40 (2006.01) B01J 23/74 (2006.01) B01J 31/28 (2006.01)

Patent

CA 1192570

PROCESS FOR THE PREPARATION OF URETHANES ABSTRACT OF THE DISCLOSURE Urethanes are prepared by reacting a substituted or unsubstituted urea having at least one hydrogen atom attached to a urea nitrogen atom with an organic compound containing at least one hydroxyl group and carbon monoxide in the presence of molecular oxygen and a catalyst system. The catalyst system includes a noble metal catalyst and oxidizing quinoid compounds or compounds capable of being converted into oxidizing quinoid compounds. This reaction is generally carried out at a temperature of 100 to 300°C and a pressure from 5 to 500 bar. The urethanes thus produced are particularly useful in the production of isocyanates and pesticides.

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