Feasibility of bio-based lactate esters as extractant for biobutanol recovery: (Liquid plus liquid) equilibria

被引：23

作者：

Zheng, Shaohua ^{[1
]}

Cheng, Hongye ^{[1
]}

Chen, Lifang ^{[1
]}

Qi, Zhiwen ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Max Planck Partner Grp, Shanghai 200237, Peoples R China

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2016年 / 93卷

基金：

中国国家自然科学基金;

关键词：

Butanol; Extraction; (Liquid plus liquid) equilibria; Butyl lactate; 2-Ethylhexyl lactate; COSMO-RS; IONIC LIQUIDS; COSMO-RS; BUTANOL RECOVERY; AQUEOUS-SOLUTIONS; T=298.15 K; WATER; PREDICTION; ALCOHOLS; LLE; SEPARATION;

D O I：

10.1016/j.jct.2015.10.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

As bio-based solvents, lactate esters can be used as extractant for removing 1-butanol from the aqueous fermentation broths. In order to evaluate the separation efficiency of butyl lactate and 2-ethylhexyl lactate for the extraction of 1-butanol from its mixture with water, the (liquid + liquid) equilibrium for the ternary systems (water (1) + 1-butanol (2) + lactate ester (3)) were measured at T= 298.15 K. The 1-butanol partition coefficient varied in the range of 4.46 to 10.29, and the solvent selectivity within 32.12 to 108.18. For the separation of low-concentration butanol from fermentation broths, butyl lactate exhibits higher partition coefficient and lower selectivity than 2-ethylhexyl lactate. The NRTL model was employed to correlate the experimental data, and the COSMO-RS theory was utilized to predict the (liquid + liquid) equilibria and to analyze the influence of lactate esters on extraction efficiency. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：127 / 131

页数：5

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