Zheng Shiqing
2005
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Journal
Modern Chemical Industry
Abstract
The production process for dichlorophenyl isocyanate (DCPI) was studied and two methods were proposed as follows: ①changing the feeding ways of dichlorophenyl ammonia and phosgene;② adding a phosgene recovery system for exhaust gas.After the modification,the reactive time was shortened by half of the conventional process,and the ratio of utilization of DCPA increased from 75% to 80%,the yield of phosgene,from 38% to 75%.