Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane

doi:10.1016/j.cjche.2021.07.021

中国化学工程学报 ›› 2022, Vol. 42 ›› Issue (2): 338-343.DOI: 10.1016/j.cjche.2021.07.021

Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane

Yabing Qi¹, Jun Li²

1. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Chemical Engineering, Sichuan University, Chengdu 610065, China

收稿日期:2020-03-04 修回日期:2021-01-20 出版日期:2022-02-28 发布日期:2022-03-30
通讯作者: Jun Li,E-mail:lijun@scu.edu.cn

Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane

Yabing Qi¹, Jun Li²

1. School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. School of Chemical Engineering, Sichuan University, Chengdu 610065, China

Received:2020-03-04 Revised:2021-01-20 Online:2022-02-28 Published:2022-03-30
Contact: Jun Li,E-mail:lijun@scu.edu.cn

摘要/Abstract

摘要： Effective distribution coefficients of 9 impurities in 1,2-diphenylethane have been calculated by directional crystallization under different ambient frozen temperature. The effect of varied zone size, temperature difference between the melt and ambient frozen environment, number of zone on purity of 1,2-diphenylethane have been also investigated during the process of zone refining. The results indicate that the product purity in the intermediate purified region with varied zone size is higher 0.04%-0.2% than that with constant zone size. The product purity increases with temperature difference between the melt and ambient frozen environment. The appropriate temperature difference is adopted 50℃. The product purity in the intermediate region of sample bar with 2 molten zones is higher 0.05%-0.43% than that with 1 molten zone. In addition, the change of enthalpy and entropy between impurities and 1,2-diphenylethane have been determined.

关键词: 1,2-Diphenylethane, Zone refining, Varied zone size, Effective distribution coefficient, Thermodynamics

Abstract: Effective distribution coefficients of 9 impurities in 1,2-diphenylethane have been calculated by directional crystallization under different ambient frozen temperature. The effect of varied zone size, temperature difference between the melt and ambient frozen environment, number of zone on purity of 1,2-diphenylethane have been also investigated during the process of zone refining. The results indicate that the product purity in the intermediate purified region with varied zone size is higher 0.04%-0.2% than that with constant zone size. The product purity increases with temperature difference between the melt and ambient frozen environment. The appropriate temperature difference is adopted 50℃. The product purity in the intermediate region of sample bar with 2 molten zones is higher 0.05%-0.43% than that with 1 molten zone. In addition, the change of enthalpy and entropy between impurities and 1,2-diphenylethane have been determined.

Key words: 1,2-Diphenylethane, Zone refining, Varied zone size, Effective distribution coefficient, Thermodynamics

Yabing Qi, Jun Li. Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane[J]. 中国化学工程学报, 2022, 42(2): 338-343.

Yabing Qi, Jun Li. Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane[J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 338-343.

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Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane

Process parameters influence on zone refining and thermodynamics analysis of 1,2-diphenylethane

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