n-Butanol as an Extractant for Lactic Acid Recovery

Authors: Kanungnit Chawong, Panarat Rattanaphanee

Abstract:

Extraction of lactic acid from aqueous solution using n-butanol as an extractant was studied. Effect of mixing time, pH of the aqueous solution, initial lactic acid concentration, and volume ratio between the organic and the aqueous phase were investigated. Distribution coefficient and degree of lactic acid extraction was found to increase when the pH of aqueous solution was decreased. The pH Effect was substantially pronounced at pH of the aqueous solution less than 1. Initial lactic acid concentration and organic-toaqueous volume ratio appeared to have positive effect on the distribution coefficient and the degree of extraction. Due to the nature of n-butanol that is partially miscible in water, incorporation of aqueous solution into organic phase was observed in the extraction with large organic-to-aqueous volume ratio.

Keywords: Lactic acid, liquid-liquid extraction, n-Butanol, Solvating extractant.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333162

References:

[1] M. M. Hossain, "Mass transfer investigation of organic acid extraction with trioctylamine and Aliquat 336 dissolved in various solvent,"
[2] S. S. Bayazit, H. Uslu and I. Inci, "Comparison of the efficiencies of amine extractants on lactic acid with different organic solvents," J. Chem. Eng. Data., vol. 56, pp. 750-756, 2011.
[3] Y. K. Hong and W.H., Hong, "Reactive extraction of lactic acid with mixed tertiary amine extractants," Biotechnol. Tech. vol. 12, pp. 915¬918, 1999.
[4] K. L. Wasewar, A. A. Yawalkar, J. A. Mouljin and V.G. Pangarkar, "Fermentation of glucose to lactic acid coupled with reactive extraction: A Review," Ind. Eng. Chem. Res., vol. 43, pp. 5969-5982, 2004.
[5] B. Choudhury and T. Swaminathan, "Lactic acid extraction with trioctyl amine," Biopro. Eng., vol. 19, pp. 317-320, 1998.
[6] A. Labbaci, G. Kyuchoukov, J. Albet and J. Molinier, "Detailed investigation of lactic acid extraction with tributylphosphate dissolved in dodecane," J. Chem. Eng. Data., vol. 55, pp. 228-233, 2010.
[7] G. Maurer, "Modeling the liquid-liquid equilibrium for the recovery of carboxylic acids from aqueous solutions," Fluid Phase. Equilibr., vol. 241, pp. 86-95, 2006.
[8] G. Kyuchoukov, M. Marinova, J. Molinier, J. Albet and G. Malmary, "Extraction of lactic acid by means of a mixed extractant," Ind. Eng. Chem. Res., vol. 40, pp. 5638-5639, 2001.
[9] G. Kyuchoukov, M. Marinova, J. Albet and J. Molinier, "New Method for the extraction of lactic acid by means of a modified extractant (Aliquat 336)," Ind Eng. Chem. Res., vol. 43, pp. 1179-1184, 2004.
[10] A. M. Eyal and R. Canari, "pH Dependence of carboxylic acid and mineral acid extraction by amine-based extractants: Effect of pKa, amine basicity, and diluents properties," Ind. Eng. Chem. Res., vol. 34, pp. 1789-1798, 1995.
[11] X. Shan, W. Qin and Y. Dai, "Dependence of extraction equilibrium of monocarboxylic acid from aqueous solutions on the relative basicity of extractant," Chem. Eng. Sci., vol. 61, pp. 2574-2581, 2006.