Li Yan-wei
2005
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Shaanxi Chemical Industry
Abstract
Chlorophenyl isocyanate was obtained with triphosgene and p-chloroaniline. Factors such as the solvent,reaction time, mole ratio of raw materials, reaction temperature and acid-capture on process were also studied. The optimal reaction conditions are as follows:the solvent is 1,2-dichloroethane,n(triphosgene)∶ n(p-chloroaniline)=1∶2,and the reaction is carried out at 75~82℃ for 4.5 h,the yield of 4-chlorophenyl isocyanate can be reached 81%.