Dinitroaniline purification with bromine and chlorine

Details Dinitroaniline purification with bromine and chlorine Dinitroaniline purification with bromine and chlorine

C - Chemistry, Metallurgy

07

C

260/612.3, 260/5

C07C 85/26 (1980.01) C07C 143/78 (1980.01)

Patent

CA 1057774

Abstract This invention is directed to a process which comprises contacting a nitrosamine-containing dinitroaniline selected from the group consisting of triflurlain, isopropalin, benefin, butralin, tendimethalin, fluchloralin, profluralin, dinitramine, 4-trifluoromethyl-2,6-dinitro-3- chloro-N,N-diethylaniline, 4-methyl-2,6-dinitro-N,N-bis(2-chloro- ethyl)aniline, oryzalin, and nitralin, (1) in liquid phase, (2) with a reagent selected from the group con- sisting of molecular bromine, molecular chlorine, N-bromosuccinimide, N-chlorosuc- cinimide, bromine chloride, pyridine per- bromide, and pyridinium bromide perbromide, until the concentration of the nitrosamine has been reduced.

309416

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