SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 35 ›› Issue (7): 173-179.DOI: 10.1016/j.cjche.2020.12.018

• Separation Science and Engineering • Previous Articles     Next Articles

Purification of carbazole by solvent crystallization under two forced cooling modes

Cui-Ping Ye1,2, Ya-Fei Qiao1, Rui-Nan Wang1, Wen-Ying Li2   

  1. 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 030024, China
  • Received:2020-07-02 Revised:2020-12-02 Online:2021-09-30 Published:2021-07-28
  • Contact: Cui-Ping Ye, Wen-Ying Li
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (21776192, 22038008). The authors thank Miss Tiantian Shi and Miss Xiaoxiao Ding for the SEM and DSC test.

Purification of carbazole by solvent crystallization under two forced cooling modes

Cui-Ping Ye1,2, Ya-Fei Qiao1, Rui-Nan Wang1, Wen-Ying Li2   

  1. 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 030024, China
  • 通讯作者: Cui-Ping Ye, Wen-Ying Li
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (21776192, 22038008). The authors thank Miss Tiantian Shi and Miss Xiaoxiao Ding for the SEM and DSC test.

Abstract: 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.

Key words: Separation, Solvent crystallization, Forced circulation cooling, Anthracene, Carbazole

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