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Citation: Chen Li, Tian Yi-Ling, Zhao Xue-Feng, Fu Hua-Feng, Li Yong-Bo. Isobaric Vapor-Liquid Equilibria of Maleic Anhydride-DIBE System Using a Small Modified Ebulliometer[J]. Acta Physico-Chimica Sinica, ;2004, 20(01): 85-89. doi: 10.3866/PKU.WHXB20040118 shu

Isobaric Vapor-Liquid Equilibria of Maleic Anhydride-DIBE System Using a Small Modified Ebulliometer

1.
Department of Chemistry, School of Science, Tianjin University, Tianjin　300072

Received Date: 30 June 2003
Available Online: 15 January 2004

T, p data for Maleic anhydride and DIBE (di-isobutylhexahydrophthalate) at different feed compositions(q) have been measured with a small modified ebulliometer and T, q data under different pressures have been obtained through interpolation. The vapor-liquid equilibrium data have been calculated by means of the parameters of NRTL equation optimized by the simplex method. The azeotropes are found to change obviously with the pressures. The azeotropes tend to disappear when the pressure is lowered to 20 kPa.
- Maleic anhydride;DIBE(di-isobutylhexahydrophthalate);NRTL equation;Isobaric vapor-liquid equilibrium
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