Original scientific paper
https://doi.org/10.15255/CABEQ.2015.2223
Optimal Reactive Extraction of Valeric Acid from Aqueous Solutions Using Tri-n-propyl amine/Diluent and Dibenzyl amine/Diluent Systems
A. Senol
; Department of Chemical Engineering, Faculty of Engineering, Istanbul University, 34320 Avcilar, Istanbul, Turkey
M. Bilgin
; Department of Chemical Engineering, Faculty of Engineering, Istanbul University, 34320 Avcilar, Istanbul, Turkey
B. Baslioglu
; Department of Chemical Engineering, Faculty of Engineering, Istanbul University, 34320 Avcilar, Istanbul, Turkey
Abstract
Reactive extraction of valeric acid from water by tri-n-propyl amine (TPA) and dibenzyl amine (DBA) dissolved in polar oxygenated aliphatic diluents (diethyl sebacate, diethyl succinate, diethyl malonate, ethyl caprylate, ethyl valerate and isoamyl alcohol)
has been studied at T = 298 ± 0.2 K and Pp =101.3 ± 0.7 kPa . Distribution data have been subjected to formulation of an optimization structure for effective acid separation. The optimization approach uses separation ratio R and synergistic enhancement SE factors to efficiently identify optimum extraction ranges. Among the examined aliphatic ester and alcohol diluents, monoesters exhibit higher solvation efficiency comprising acid1–amine1 complex formation, while isoamyl alcohol yields larger loading factors. The uptake capacity of the amine/diluent system is ranging in the order TPA > DBA. Modeling efforts based on the mass-action law principles have shown considerable success. The mass action law chemodel and modified Langmuir approach are quite accurate yielding mean errors of 0.9 % and 0.7 %, respectively.
Keywords
extraction; valeric acid; amine; modeling; optimization
Hrčak ID:
167261
URI
Publication date:
6.10.2016.
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