Wei Wen
2008
Citations
0
Influential Citations
0
Citations
Journal
Chinese Journal of Applied Chemistry
Abstract
A new method to synthesize chlorophenyl isocyanates from corredponding chloroanilines and triphosgene was studied.The optimal reaction conditions were found via investigating the effects of solvent,reaction time and mole ratio of reactants on the yield.The results show that the optimal sovent is 1,2-dichlo-roethane,the optimal reaction time to prepare o-chlorophenyl isocyanates,m-chlorophenyl isocyanates and p-chlorophenyl isocyanates is respectively 5 h,4.5 h and 4.5 h,the optimal mole ratio of corredponding chloroanilines and triphosgene is respectively 2.2∶1,2∶1 and 2∶1.Under those conditions,the highest yields of o-chlorophenyl isocyanates m-chlorophenyl isocyanates and p-chlorophenyl isocyanates are respectively 84.7%,86.2% and 89.0%,and the purities of the products are respectively 96.18%,97.83% and 99.55%.