Method of manufacturing diphenylmethane dicarbamic acid diesters

Details Method of manufacturing diphenylmethane dicarbamic acid diesters Method of manufacturing diphenylmethane dicarbamic acid diesters

1986-09-08

1987-10-13

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

C07C12506, C07C125073

Patent

active

046999949

ABSTRACT:
According to a method of manufacturing a diphenylmethane dicarbamic acid ester by reacting an N-phenyl carbamic acid diester with a methylating agent in an aqueous acid solution, the aqueous acid solution is an aqueous inorganic acid solution, and the concentration of the N-phenyl carbamic acid ester in the aqueous acid solution is not more than the solubility thereof at the reaction temperature.

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