Selective recovery of pyruvic acid from two and three acid aqueous solutions by reactive extraction

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dc.contributor.authorMarti, Mustafa E.
dc.contributor.authorGurkan, Turker
dc.date.accessioned2020-03-26T19:07:02Z
dc.date.available2020-03-26T19:07:02Z
dc.date.issued2015
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIn this study, a multi-stage reactive extraction system is devised for the selective recovery of pyruvic acid (PA) from a multiple-acid solution having a carboxylic acid composition identical to that obtained in microbial fermentation. With single-stage extraction, approximately 40% of the acetic acid (AA) is preferentially and selectively recovered from the aqueous three-acid solution using 0.1 M trioctylamine (TOA) in 1-octanol. Pyruvic acid is the only solute positively affected by an increase in the TOA concentration; however, the purity of the final extract is compromised by co-extracted acids. The distribution coefficient (K-D) values obtained in three-acid solutions are lower than those obtained in single-acid solutions, showing the antagonistic effects due to the presence of other acids. However, in two-acid solutions, the presence of lactic acid (LA) at an initial concentration of about 7-20% (0.05-0.15 M) of that of PA (0.75-0.85 M) causes an increase of 33-80% on the K-D of the latter. Using 0.6 M TOA in 1-octanol, 92% of initial PA is recovered from the two-acid solution. The competition with the other acid(s) for ion pair formation and its marked hydrophilicity hinders the extraction of LA from multiple acid solutions. Thus, a successful selective separation is achieved for the three acids present in the aqueous phase. A further increase in the initial concentration ratio of LA to PA in two-acid solution results in reduced KD values for the latter. The maximum separation factor of 54.3 is obtained at the lowest acid ratio (AR, 0.19) and highest TOA concentration (0.6 M). Hence, reactive extraction can be successfully employed to selectively recover PA from two and three-acid aqueous solutions. (C) 2015 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipTurkish State Planning Organization [BAP-08-11-DPT-2002K120510-(OYP-FBE-BTEK-4)]en_US
dc.description.sponsorshipThe authors wish to acknowledge the Turkish State Planning Organization, under Grant No. BAP-08-11-DPT-2002K120510-(OYP-FBE-BTEK-4) for the support of this study. The authors also acknowledge Dr. Cevdet Oztin and Mrs. Gulten Orakci of Middle East Technical University and Dr. William J. Colonna of Iowa State University for their guidance and support.en_US
dc.identifier.doi10.1016/j.seppur.2015.09.067en_US
dc.identifier.endpage157en_US
dc.identifier.issn1383-5866en_US
dc.identifier.issn1873-3794en_US
dc.identifier.startpage148en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.seppur.2015.09.067
dc.identifier.urihttps://hdl.handle.net/20.500.12395/32536
dc.identifier.volume156en_US
dc.identifier.wosWOS:000366537900007en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofSEPARATION AND PURIFICATION TECHNOLOGYen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectSelective recoveryen_US
dc.subjectMultiple-acid aqueous solutionsen_US
dc.subjectReactive extractionen_US
dc.subjectPyruvic aciden_US
dc.subjectTrioctylamineen_US
dc.titleSelective recovery of pyruvic acid from two and three acid aqueous solutions by reactive extractionen_US
dc.typeArticleen_US

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