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

• Separation Science and Engineering • Previous Articles Next Articles

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:2015-04-03 Published:2015-03-28
Supported by:
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

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).

Abstract

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

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

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.

References

[1] U.A. Sedran, N.S. Figoli, Solid aromatic production inmethanol conversion to hydrocarbons, J. Chem. Tech. Biotechnol. 53 (1992) 379-382.
[2] R.B. Benmett, W.T. Hunt, J.M. Powers, R.B. Speed, Durene production, U. S. Patent, 2766310 (1956).
[3] J. Ulrich, Is melt crystallization a green technology, Cryst. Growth Des. 4 (2004) 879-880.
[4] Y. Mandri, A. Rich, D. Mangin, S. Abderafi, C. Bebon, N. Semlali, J.P. Klein, T. Bounahmidi, A. Bouhaouss, Parametric study of the sweating step in the seawater desalination process by indirect freezing, Desalination 269 (2011) 142-147.
[5] K. Chaleepa, A. Szepes, J. Ulrich, Dry fractionation of coconut oil by melt crystallization, Chem. Eng. Res. Des. 88 (2010) 1217-1222.
[6] A. Konig,M. Stepanski, A. Kuszlik, P. Keil, C.Weller, Ultra-purification of ionic liquids by melt crystallization, Chem. Eng. Res. Des. 86 (2008) 775-780.
[7] S.P. Erjawetz, J. Ulrich, M. Tiedtke, R.W. Hartel, Milk fat fractionation by solid-layer melt crystallization, J. Am. Oil Chem. Soc. 76 (1999) 579-584.
[8] Z.H. Tian, H.M. Jia, G.L. Zhao,W.Q. Hu, Purification of 2,6-diisopropylnaphthalene by static melt crystallization from a mixture containing diisopropylnaphthalene isomers, Chin. J. Chem. 25 (2007) 108-112.
[9] M. Matsuoka, T. Fukuda, Y. Takagi, H. Takiyama, Purification by sweating of organic solid solutions by layer and suspension type melt crystallization, J. Chem. Eng. Jpn. 28 (1995) 562-569.
[10] K.J. Kim, J. Ulrich, Theoretical and experimental studies on the behaviour of liquid impurity in solid layer melt crystallizations, J. Phys. D. Appl. Phys. 34 (2001) 1308-1317.
[11] R. Scholz, K.Wangnick, J. Ulrich, On the distribution and movement of impurities in crystalline layers in melt crystallization processes, J. Phys. D. Appl. Phys. 26 (1993) B156-B161.
[12] M. Poschmann, J. Ulrich, Fractional suspension crystallization with additional purification steps, J. Cryst. Growth 167 (1996) 248-252.
[13] J.J. Huang, Y.Y. Cheng, Z.G. Gu, Screening of extractant for extractive distillation of durene from C₁₀ heavy aromatics, J. Petrochem. Technol. 39 (2010) 401-405 (in Chinese).
[14] Y.B. Zhou, Z.G. Gu, J.J. Huang, Separation of durene from C₁₀ aromatics by integrated separation technologies, J. Petrochem. Technol. 38 (2009) 1085-1089.
[15] C. Wu, P. Huang, X.D. Wang, Preparation and application of durene, J. Technol. Dev. Chem. Ind. 33 (2004) 24-28 (in Chinese).
[16] K.J. Kim, J. Ulrich, A quantitative estimation of purity and yield of crystalline layers concerning sweating operations, J. Cryst. Growth 234 (2002) 551-560.
[17] K.J. Kim, J. Ulrich, Purification of crystalline layers by controlling the temperature gradient, Powder Technol. 121 (2001) 81-87.
[18] M. Matsuoka, A. Sumitani, Rate of composition change of organic solid solution crystals in sweating operations, J. Chem. Eng. Jpn. 21 (1988) 6-10.
[19] M. Matsuoka, M. Ohishi, S. Kasama, Purification of p-dichlorobenzene and mchloronitrobenzene crystalline particles by sweating, J. Chem. Eng. Jpn. 19 (1986) 181-185.
[20] G.Z.Wu, X.G. Li, F. Coulon, H. Li, J. Lian, H. Sui, Recycling of solvent used in a solvent extraction of petroleum hydrocarbons contaminated soil, J. Hazard. Mater. 186 (2011) 533-539.
[21] X.G. Li, L. He, G.Z. Wu, W.J. Sun, H. Li, H. Sui, Operational parameters, evaluation methods, and fundamental mechanisms: Aspects of nonaqueous extraction of bitumen from oil sands, Energy Fuel 26 (2012) 3553-3563.

Purification and separation of durene by static melt crystallization

Purification and separation of durene by static melt crystallization

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 1

Recommended Articles

Metrics

Comments