Separation of nitrophenols. Equilibriums in bi- and tri-phasic systems |
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| Authors: | Ioana Diaconu Hassan Y. Aboul-Enein Mohammed A. Al-Omar Gheorghe Nechifor Elena Ruse Andrei A. Bunaciu Eugenia Eftimie Totu |
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| Affiliation: | 1. University Politehnica Bucharest, Faculty of Applied Chemistry and Materials Science, Department of Analytical Chemistry, 1–5 Polizu Street, Bucharest 011061, Romania;2. Pharmaceutical and Medicinal Chemistry Department, National Research Centre, Dokki, Cairo, Egypt;3. Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;4. CROMATEC_PLUS SRL, Analytical Research Department, 18 Sos. Cotroceni, Bucharest 6, 060114, Romania |
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| Abstract: | ![]()
The paper presents experimental data obtained in the study of liquid–liquid partition equilibriums in biphasic system in order to optimize the process of transport through bulk liquid membranes (triphasic partition systems). The partition equilibriums of some nitrophenols using chloroform as extraction solvent and membranary solvent, respectively, were studied. The influence of the pH on the partition equilibriums was investigated. The repartition constants and the pKa values of the studied nitrophenols were calculated. Nitrophenols were transferred in triphasic system from a feed phase with pH 2, through a chloroform liquid membrane, into a receiving phase with pH 12, with efficiencies over 90%. |
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| Keywords: | 2,4-Dinitrophenol Extraction Transport through bulk liquid membranes Nitrophenols separation |
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