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Continuous Countercurrent Liquid-Liquid Extraction Method for the Separation of 2,3-Butanediol from Fermentation Broth Using N-Butanol and Phosphate Salt

Continuous Countercurrent Liquid-Liquid Extraction Method for the Separation of 2,3-Butanediol from Fermentation Broth Using N-Butanol and Phosphate Salt, Snehal D. Birajdar, Srinivasan Rajagopalan, Jayant S. Sawant, and Sasisanker Padmanabhan. Process Biochemistry 2015, 50  (9), 1449–1458.

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Abstract

In this study, we examined continuous countercurrent liquid-liquid extraction (CC-LLE) of 2,3-butanediol (BDO) from synthetic (BDO + water) and fermented broth solutions in a bubble column using n-butanol as an extractant solvent. To elucidate salting-out effect on the extraction feasibility of BDO, CC-LLE experiments were also conducted for synthetic and fermented BDO solutions by adding 10 wt% K2HPO4 salt to the aqueous feed. Distribution coefficients, volumetric mass transfer coefficients, number of equilibrium stages, minimum solvent requirement, and extraction efficiencies were determined from the CC-LLE experiments for three different concentrations of BDO in feed. The results showed that addition of phosphate salt to the aqueous feed increased the BDO extraction efficiency by 81.8% for synthetic BDO solution and by 30% for fermented BDO solution at 2.5 wt% BDO in feed. Furthermore, modeling of CC-LLE for synthetic BDO solution using a newly parameterized UNIFAC-LL (Universal Functional Group Activity Coefficient - Liquid-Liquid) method within the Aspen Plus simulation program predicted that 99% BDO extraction efficiency can be achieved with 6 theoretical equilibrium stages. (C) 2015 Elsevier Ltd. All rights reserved.

BibTeX

@article{ ISI:000359166400017,
Author = {Birajdar, Snehal D. and Rajagopalan, Srinivasan and Sawant, Jayant S. and Padmanabhan, Sasisanker},
Title = {Continuous Countercurrent Liquid-Liquid Extraction Method for the Separation of 2,3-Butanediol from Fermentation Broth Using N-Butanol and Phosphate Salt},
Journal = {Process Biochemistry},
Year = {2015},
Volume = {50},
Number = {9},
Pages = {1449-1458},
Month = {},
Abstract = {In this study, we examined continuous countercurrent liquid-liquid extraction (CC-LLE) of 2,3-butanediol (BDO) from synthetic (BDO + water) and fermented broth solutions in a bubble column using n-butanol as an extractant solvent. To elucidate salting-out effect on the extraction feasibility of BDO, CC-LLE experiments were also conducted for synthetic and fermented BDO solutions by adding 10 wt\% K2HPO4 salt to the aqueous feed. Distribution coefficients, volumetric mass transfer coefficients, number of equilibrium stages, minimum solvent requirement, and extraction efficiencies were determined from the CC-LLE experiments for three different concentrations of BDO in feed. The results showed that addition of phosphate salt to the aqueous feed increased the BDO extraction efficiency by 81.8\% for synthetic BDO solution and by 30\% for fermented BDO solution at 2.5 wt\% BDO in feed. Furthermore, modeling of CC-LLE for synthetic BDO solution using a newly parameterized UNIFAC-LL (Universal Functional Group Activity Coefficient - Liquid-Liquid) method within the Aspen Plus simulation program predicted that 99\% BDO extraction efficiency can be achieved with 6 theoretical equilibrium stages. (C) 2015 Elsevier Ltd. All rights reserved.},
DOI = {10.1016/j.procbio.2015.05.016},
ISSN = {1359-5113},
EISSN = {1873-3298},
Unique-ID = {ISI:000359166400017},
}

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