Main Article Content
Extraction of lactic acid from its aqueous solution using n-butanol containing inorganic salt was studied. Effect of changing process variables (salt type and concentration, initial lactic acid concentration and extraction temperature) on extraction efficiency was investigated. Three chloride salts, i.e. NaCl, MgCl2 and CaCl2 were used. Degree of extraction was represented by value of distribution coefficient of lactic acid in each system. The result was compared with salt-free system of the same extracting conditions. Salting-in and salting-out effects were clearly observed for all the salts within the studied concentration range. When the salt concentration was sufficiently high, the distribution coefficient increased with increasing salt concentration. Among these three salts, NaCl demonstrated the highest degree of lactic acid extraction using n-butanol. The distribution coefficient was found to decrease with increasing temperature in the range of 30-50C.
Copyright @2021 Engineering Transactions
Faculty of Engineering and Technology
Mahanakorn University of Technology
P. Borgardts, W. Krischke, W. Trosch, & H. Brunner, “Integrated bioprocess for the simultaneous production of lactic acid and dairy sewage treatment”, Bioprocess Eng, vol.19, pp. 321–329, 1998.
G. Raya-Tonetti, P. Cordoba, J. Bruno-Barcena, F. Sineriz, & N. Perotti, “Fluidized bed ion exchange for improving purification of lactic acid from fermentation”, Biotechnoly Tech., vol.13, pp. 201–205, 1999.
M. M. Hossain, “Mass transfer investigation of organic acid extraction with trioctylamine and Aliquat 336 dissolved in various solvent”, http://cdn.intechweb.org/pdfs/13542.pdf
Ş. S. Bayazit, H. Uslu and Ỉ. Ỉnci, “Comparison of the efficiencies of amine extractants on lactic acid with different organic solvents”, J. Chem. Eng. Data., vol. 56, pp. 750-756, 2011.
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.
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.
B. Choudhury and T. Swaminathan, “Lactic acid extraction with trioctyl amine”, Biopro. Eng., vol. 19, pp. 317-320, 1998.
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.
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.
K. Chawong, and P. Rattanaphanee. “n-Butanol as an Extractant for Lactic Acid Recovery”, World Acad. Sci. Eng. Tech., vol. 80, pp. 239-242, 2011.
B. Ghalami-Choobar, A. Ghanadzadeh and S. Kousarimehr. “Salt effect on the liquid-liquid equilibrium of (water + propionic acid + cyclohexanol) system at T = (298.2, 303.2, and 305.2) K”, Chin. J. Chem. Eng., vol 19, no.4, pp. 565-569, 2011.