Purification and separation of durene by static melt crystallization

doi:10.1016/j.cjche.2014.11.018

›› 2015, Vol. 23 ›› Issue (3): 505-509.DOI: 10.1016/j.cjche.2014.11.018

Purification and separation of durene by static melt crystallization

Shan Cong^1,2, Ying Liu¹, Hong Li^1,2, Xingang Li^1,2, Lvhong Zhang¹, LeiWang³

1 School of Chemical Engineering, Tianjin University, Tianjin 300072, China;
2 National Engineering Research Center for Distillation Technology, Tianjin 300072, China;
3 Yunnan Jiehua Clean Energy Development Co., Ltd., Yunnan 650224, China

收稿日期:2013-03-18 修回日期:2013-05-06 出版日期:2015-03-28 发布日期:2015-04-03
通讯作者: Lvhong Zhang
基金资助:
Supported by the National Natural Science Foundation of China (21176172) and Top Talents Program of Yunnan Province, China (2011HA010).

Purification and separation of durene by static melt crystallization

Shan Cong^1,2, Ying Liu¹, Hong Li^1,2, Xingang Li^1,2, Lvhong Zhang¹, LeiWang³

1 School of Chemical Engineering, Tianjin University, Tianjin 300072, China;
2 National Engineering Research Center for Distillation Technology, Tianjin 300072, China;
3 Yunnan Jiehua Clean Energy Development Co., Ltd., Yunnan 650224, China

Received:2013-03-18 Revised:2013-05-06 Online:2015-03-28 Published:2015-04-03
Supported by:
Supported by the National Natural Science Foundation of China (21176172) and Top Talents Program of Yunnan Province, China (2011HA010).

摘要/Abstract

摘要： The purification and separation of durene from the mixture containing durene isomers were studied. Since the boiling points of tetramethyl benzene isomers are very close but theirmelting points are of great differences, static melt crystallization was applied to separate and purify durene from its isomers. Crystallization experiments were carried out under various operating conditions. The effects of cooling rate, crystallization temperature, sweating temperature and sweating time on the yield and purity of crystal were investigated. Orthogonal experimental designmethodwas adopted to analyze the factors that may affect the yield of durene. Under the optimal crystallization conditions, the purity of durene could reach as high as 99.06% with the yield of 75.3% through one crystallization process. By fitting purification data based on sweating time in isothermal operations, the purification rate coefficient was obtained.

关键词: Durene, Static melt crystallization, Isothermal sweating, Orthogonal experimental design

Abstract: The purification and separation of durene from the mixture containing durene isomers were studied. Since the boiling points of tetramethyl benzene isomers are very close but theirmelting points are of great differences, static melt crystallization was applied to separate and purify durene from its isomers. Crystallization experiments were carried out under various operating conditions. The effects of cooling rate, crystallization temperature, sweating temperature and sweating time on the yield and purity of crystal were investigated. Orthogonal experimental designmethodwas adopted to analyze the factors that may affect the yield of durene. Under the optimal crystallization conditions, the purity of durene could reach as high as 99.06% with the yield of 75.3% through one crystallization process. By fitting purification data based on sweating time in isothermal operations, the purification rate coefficient was obtained.

Key words: Durene, Static melt crystallization, Isothermal sweating, Orthogonal experimental design

Shan Cong, Ying Liu, Hong Li, Xingang Li, Lvhong Zhang, LeiWang. Purification and separation of durene by static melt crystallization[J]. , 2015, 23(3): 505-509.

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Purification and separation of durene by static melt crystallization

Purification and separation of durene by static melt crystallization

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