期刊
JOURNAL OF CHEMICAL THERMODYNAMICS
卷 93, 期 -, 页码 127-131出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2015.10.003
关键词
Butanol; Extraction; (Liquid plus liquid) equilibria; Butyl lactate; 2-Ethylhexyl lactate; COSMO-RS
资金
- National Natural Science Foundation of China [NSFC U1462123]
- Major State Basic Research Development Program of China (973 Program) [2012CB720502]
- Fundamental Research Funds for the Central Universities of China
- 111 Project [B08021]
- Max Planck Partner Group Funding from the Max Planck Society, Germany
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.
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