Yazar "Marti, Mustafa Esen" seçeneğine göre listele

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    Extraction of levulinic acid using tri-n-butyl phosphate and tri-n-octylamine in 1-octanol: Column design
    (Elsevier, 2016) Datta, Dipaloy; Marti, Mustafa Esen; Uslu, Hasan; Kumar, Sushil
    The reactive extraction of levulinic acid using two different extractants [tri-n-butyl phosphate (TBP) and tri-n-octylamine (TOA)] dissolved in 1-octanol was investigated at 298 K. Using the equilibrium data, the distribution coefficient (K-D), extraction efficiency (%E) and loading ratios (Z) were calculated. TOA provided highest K-D values with 1-octanol. A maximum K-D was obtained as 9.571 using 0.689 mol/kg TOA while 90.54 % of the initial levulinic acid was extracted. Increasing the initial acid concentration resulted in a decrease in the extraction efficiency. Loading ratios were found to be less than 1 for TBP while both types, i.e. 1:1 and 2:1 acid-amine complexes were expected to form with TOA. The feasibility of the extraction process was assessed by calculating minimum solvent to feed ratio required for 90% recovery of levulinic acid, number of theoretical stages, height and diameter of the extraction column. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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    Reactive extraction of pimelic (heptanedioic) acid from dilute aqueous solutions using trioctylamine in decan-1-ol
    (Elsevier, 2016) Marti, Mustafa Esen; Zeidan, Hani; Uslu, Hasan
    The present study is on the reactive extraction of pimelic acid (heptanedioic acid) from dilute aqueous solutions by trioctylamine (TOA) in decan-1-ol. The equilibrium studies were performed at 298 K and the results were used to calculate the values of distribution coefficient (K-D), loading factor (Z) and degree of extraction (E%). The maximum K-D was obtained as 6234 when initial concentrations of pimelic acid and TOA were 0.038 and 0.2 mol(-1) kg(-1), respectively. The extraction efficiency was 98.27% under these conditions. Moreover, Z values between 0.184 and 2.934 were obtained in the ranges of parameters studied. The data presents the formation of 1:1 and 1:2 pimelic acid-TOA solvates in the organic phase. A solvatochromic model (LSER) was applied to the equilibrium data and the K-D values obtained using the model show a good fit to the experimental outcomes. (C) 2016 Elsevier B.V. All rights reserved.