Purification of carbazole by solvent crystallization under two forced cooling modes  

作　　者：Cui-Ping Ye Ya-Fei Qiao Rui-Nan Wang Wen-Ying Li 

机构地区：[1]College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China [2]Training Base of State Key Laboratory of Coal Science and Technology Jointly Constructed by Shanxi Province and Ministry of Science and Technology,Taiyuan University of Technology,Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第7期173-179,共7页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21776192,22038008)。

摘　　要：To identify the effect of solvents and anthracene on the purification of carbazole,the solvent crystallization of carbazole was investigated with xylene,chlorobenzene and tetrachloroethylene(TCE)as solvents under two forced circulation cooling(FCC)modes.The co-crystalline experimental data were obtained from runs carried out at different anthracene levels between 1%(mass)and 10%(mass).The results showed that a uniform flake carbazole crystal obtained when using xylene and chlorobenzene under the FCC-1 mode with gradual cooling rate.Nevertheless,fine flake crystals grown under shock cooling of FCC-2 mode.It is beneficial to improving the purity of carbazole with chlorobenzene as solvent under cooling mode of FCC-1.Anthracene could promote the growth of carbazole in solution,and it has a significant influence on the purification of carbazole.

关 键 词：SEPARATION Solvent crystallization Forced circulation cooling Anthracene CARBAZOLE 

分 类 号：TQ251.35[化学工程—有机化工]