Removal of nitrosating agents

Details Removal of nitrosating agents Removal of nitrosating agents

C - Chemistry, Metallurgy

07

C

260/612.9

C07C 201/16 (2006.01)

Patent

CA 1080749

Abstract The concentration of nitrosating agents in 1- chloro-2-6-dinitro-4-(trifluoromethyl)benzene is lowered by in any order: (1) contacting 1-chloro-2,6-dinitro-4-(trifluoro- methyl)benzene containing nitrosating agents with an aqueous solution of an inorganic base at a temperature of 50-100°C., and optionally separating the treated 1-chloro 2,6-dinitro- 4-(trifluoromethyl benzene; (2) bubbling a gas which is non-reactive with 1- chloro-2,6-dinitro-4-(trifluoromethyl)benzene through an aqueous mixture of the 1-chloro- 2,6-dinitro-4 (trifluoromethyl)benzene, at a temperature of 50-100°C., and optionally, separating the treated 1-chloro-2,6 dinitro- 4-(trifluoromethyl)benzene; (3) and optionally repeating steps (1) and/or (2) any number of times. The treated 1-chloro-2,6-dinitro-4-(trifluoromethyl)benzene can form dinitroaniline products with low nitrosamine content.

311630

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