Process for the production of methylenedicarbanilates

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

1983-01-17

1984-10-09

Helfin, Bernard

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

Organic compounds

Carboxylic acid esters

C07C12507

Patent

active

044763174

ABSTRACT:
A process is described for producing methylenedicarbanilates 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 H.sub.o, (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.sub.o, (4) heteropolymolybdic acid, and (5) heteropolytungstic acid.

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patent: 4230877 (1980-10-01), Shawl et al.
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patent: 4319018 (1982-03-01), Miyata et al.
Rohm & Haas Co., "Amberlite 200", Philadelphia 5, PA, 1E-51-60(a), 4/1962.

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