Patent number: 10017436
Abstract: The present invention provides a method of making 1,1,1,2,3-pentachloropropane comprising: (1) utilizing 1,1,1,3-tetrachloropropane as a raw material and 1,1,1,2,3-pentachloropropane as a solvent to carry out a dehydrochlorination reaction to obtain 1,1,3-trichloropropene, and after the reaction, (2) introducing chlorine gas into the reaction system to carry out a chlorination reaction to obtain 1,1,1,2,3-pentachloropropane. In the present invention, 1,1,1,2,3-pentachloropropane acts as a solvent or a diluent, and may act as an inhibitor to prevent the production of high-boiling residues such as dimers, oligomers or polymers during the dehydrochlorination process. Then, the conversion rate of 1,1,1,3-tetrachloropropane is increased, and consequently, the yield of final product 1,1,1,2,3-pentachloropropane is also increased.
Type:
Grant
Filed:
March 26, 2018
Date of Patent:
July 10, 2018
Assignee:
Jiangxi Tianyu Chemical Co., Ltd.
Inventors:
Zhong Zhou, Haipeng Xu, Yiming Yu, Peng Peng, Yaling Zhao, Xichao Wang, Xiaori Yue