%0 Journal Article
%T Reactive Extraction of Citric Acid Using Different Extractants: Equilibrium, Kinetics and Modeling
%A Chaudhari
%A P. K.
%A Datta
%A D.
%A Pal
%A D.
%A Prajapati
%A A. K.
%A Thakre
%A N.
%J -
%D 2017
%R 10.15255/CABEQ.2016.859
%X Saˋetak Recovery of citric acid from biotechnologically produced low concentration aqueous solution has attracted several separation techniques for the downstream processing. Amongst them, reactive extraction is a convenient, cheap, and effective method. Three different extractants are used in this study, namely tri-n-butyl phosphate (TBP), tri-n-octylamine (TOA), and Aliquat 336 (A336), all diluted in methyl-iso-butyl ketone (MIBK). The isothermal batch experiments were performed for the equilibrium and kinetic studies at T = 300.15㊣1 K. Around 92 % extraction efficiency (E %) was obtained using 20 % (v/v) TOA in MIBK. Based on the overloading of amine (Z > 0.5), (2:1) acid:extractant complex in TOA+MIBK phase was proposed. Kinetics of extraction of citric acid (0.2每0.8 kmol m每3) was also performed in a Lewis-type stirred cell, using TOA in MIBK. The extraction reaction was occurring in the diffusion film. The second order rate constant was calculated as k2 = 0.0351 m3 kmol每1 s每1. The extraction parameters were estimated by differential evolution optimization technique. Optimal value of equilibrium constant, KE, was found to be 3.6 ﹞ 10每3 (m3 kmol每1)2, for the reactive extraction of citric acid using 20 % TOA in MIBK, and was found in close agreement with experimental values. This work is licensed under a Creative Commons Attribution 4.0 International License
%K reactive extraction
%K citric acid
%K differential evolution
%K modeling
%K equilibrium
%K kinetics
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=283672