Extraction of Lactic Acid by Means of a Mixed Extractant

Abstract

Equilibrium studies on the extraction of lactic acid by means of a mixed extractant (a mixture of tri-n-octylamine and Aliquat 336 in decanol) are carried out. Different ratios between the two extractants are investigated, and the obtained results are compared with those using the individual extractants. The effect of the initial pH of the aqueous solution on the extraction extent is followed in a large interval. The equilibrium pH values are also measured. The obtained results give grounds to conclude that the mixture of a tertiary amine and a quaternary ammonium salt is more efficient than the individual extractants. This makes it particularly appropriate for the recovery of lactic acid from fermentation broth.

Mass Transfer Investigation of Organic Acid Exatraction with Trioctylamine and Aliquat 336 Dissolved in Various Solvents

“…is apparent in these results, as reported in the literature Kyuchoukov, et al, 2001;Yankov, et al, 2005). However, this synergistic effect is much more apparent at lower pH (pH 4) than at higher pH (pH 6).…”

(Liquid+liquid) equilibria of the (water+propionic acid+Aliquat 336+organic solvents) at T=298.15K

“…Solvation of the complex by the diluent is a critical factor in the extraction of acid. The interactions between the complex and diluent can be divided into general solvation and specific interactions of the diluent with the complex [13][14][15]. Polar diluents have been shown to be more convenient diluents than inert ones (non-polar), due to their higher distribution.…”

Ekstraksi Asam Sitrat Dan Asam Oksalat : Pengaruh Trioctylamine Sebagai Extracting Power Dalam Berbagai Solven Campuran Terhadap Koefisien Distribusi

“…Penelitian lain juga telah dilakukan seperti penentuan koefisien partisi dari ekstraksi asam sitrat, asam asetat, dan asam oksalat dengan menggunakan extracting power TOA dan berbagai solven yaitu toluene, methylisobutylketone, dan chloroform 1998a;1998b;Schunk et al, 2004); pemungutan kembali (recovery) asam tartrat dengan TOA dalam diluen biner (Yankov et al, 1999); kajian pengaruh asam-asam anorganik dan garam-garam natrium (Ingale and Mahajani, 1996); kajian pH (Tomovska et al, 1999;Choudhury et al, 1998;Hong, 2005). Pengaruh solven TOA, di(2-ethylhexyl) phosphoric acid dan xylene pada ekstraksi asam laktat serta pengaruh komposisi fase organik dan temperatur telah diteliti oleh Juang and Huang (1997) sedangkan campuran ekstraktan TOA, Aliquat 336 dan 1-decanol dikaji oleh Kyuchoukov et al (2001). Qin et al (2001) melaporkan hasil penelitiannya tentang ekstraksi asam oksalat dengan menggunakan solven TOA dan mengusulkan bentuk mekanismenya.…”