Purification of robenidine hydrochloride

Details Purification of robenidine hydrochloride Purification of robenidine hydrochloride

1975-05-19

1976-09-14

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C13310

Patent

active

039807053

ABSTRACT:
A superior grade of 1,3-bis(4-chlorobenzylideneamino)-guanidine hydrochloride is obtained by dispersing crude material in a suitable solvent, slowly adding to the dispersion an amount of base at least equivalent to the number of moles of 1,2,3-tris(4-chlorobenzylideneamino)guanidine hydrochloride present in said crude 1,3-bis(4-chlorobenzylideneamino)guanidine hydrochloride, separating the purified 1,3-bis(4-chlorobenzylideneamino)guandidine hydrochloride therefrom, and washing and drying the same.

REFERENCES:
patent: 3769432 (1973-10-01), Tomcufcik

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