Method for the synthesis of ureas

Details Method for the synthesis of ureas Method for the synthesis of ureas

C - Chemistry, Metallurgy

07

D

260/255, 260/315

C07D 233/70 (2006.01) C07C 273/18 (2006.01) C07D 233/32 (2006.01) C07D 233/34 (2006.01) C07D 239/10 (2006.01)

Patent

CA 1058174

ABSTRACT OF THE DISCLOSURE A method for the preparation of a group of variously substituted ureas is disclosed, these compounds being obtained by the pyrolytic decompo- sition of the alkali metal or alkaline earth metal carbamates corresponding to the expected ureas, the reaction taking place at a temperature of between 150°C and 400°C under atmospherical pressures, and preferably under subatmospherical pressures, under which conditions the expected urea either sublimes or is distilled.

241089

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