| 摘要 |
<p>The concentration of nitrosating agents in 1chloro-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.degree.C., and optionally separating the treated 1-chloro 2,6-dinitro-4-(trifluoromethyl benzene; (2) bubbling a gas which is non-reactive with 1chloro-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.degree.C., and optionally, separating the treated 1-chloro-2,6 dinitro4-(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.</p> |
