Process for the production of methylenedicarbanilates

Details Process for the production of methylenedicarbanilates Process for the production of methylenedicarbanilates

C - Chemistry, Metallurgy

07

C

260/468.2

C07C 271/06 (2006.01)

Patent

CA 1150293

M-12-24447C/80. ABSTRACT OF THE DISCLOSURE A process is described for producing methylenedi- carbanilates by reacting carbanilates with formaldehyde in the presence of a specific catalyst. The catalyst is selected from (1) a cation exchanger containing sulfonic acid groups which has a proton exchange capacity of at least 0.1 meq/g, (2) a clay having an acidity of at least 0.1 meq/g at an acidic site, the acid strength of the acidic site being -3.0 or less as a value of acidity function Ho, (3) a mixed oxide having an acidity of at least 0.1 meq/g at an acidic site, the acid strength of the acidic site being -3.0 or less as a value of acidity function H , (4) heteropolymolybdic acid, and (5) hetero- polytungstic acid.

361768

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