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    Additives For High Quality Gasoline Production
    (Beykent Üniversitesi, 2008) Bamuflah, Hisham; Abdullah, Salah A.; Yorulmaz, Yavuz
    Gasolines are liquid fuels produced by refining operations for transport purposes. In this study, gasoline properties are studied for ideal purposes and compared and compared with each other for different additives. The octane value, RVP, IBP, 10%, 30%, 50%, 70% and FBP vaporization temperatures were the main properties studied and their predictions for a blend from its components were the utmost importance. The correlations obtained from the actual blending data by multiple regressional ana-lysis produced better results as compared to the ones obtained from the classical methods.
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    Correlations For Estimating Diesel Oil Properties from Component Data
    (Beykent Üniversitesi, 2009) Yorulmaz, Yavuz; Uslu, Hasan
    Diesel oil stocks obtained from light and heavy Saudi Arabian crude oils were analyzed for their physical properties. By blending these component stocks in various ratios, final diesel oil products were obtained and correlations for the prediction of properties of final blends were developed with the help of multiple analysis technique on component data. The results produced from these correlations were compared with the actual laboratory data and good agreements supporting the correlations were observed.
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    Prediction Of Viscosities Of Petroleum Fractions
    (Beykent Üniversitesi, 2009) Yorulmaz, Yavuz; Uslu, Hasan
    The Viscosity-Gravity constant (VGC) can be more useful for predicting viscosities of lubricating oil blends by combining the VGC with a term to reflect the paraffinic or napthenic nature of the oils as compared to other theoretical and semi-theoretical methods found in literature. In this work, the combination of VGC and paraffin content of oil is used to predict viscosity at 100 oF (37.8 oC) and 210 oF (98.9 oC). The viscosities are among the important properties standardized by the American Society for Testing Materials (ASTM) and by the Institute of Petroleum (IP) for quality control of finished lubricating oil products. The viscosities were found to have a strong correlation with composition and VGC. Therefore, oil composition was considered a correlating parameter. The equations were derived from experimental data and no theoretically derived equations of similar nature were found in the literature for comparison purposes. For oils of the same viscosity, a low specific gravity (high API) indicates a paraffinic oil while high specific gravity (low API) indicates a napthenic oil. From the concept of viscosi-ty-gravity constant the higher VGC indicates a more napthenic oil and, conversely the lower VGC indicates a more paraffinic oil. Also a higher VGC suggets an oil will have a greater rate of viscosity change with a change in temperature.
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    Reactive extraction and LSER model consideration of lactic acid with tripropylamine plus organic solvent systems from aqueous solution at room temperature
    (Elsevier Science Bv, 2009) Uslu, Hasan; Bayat, Cuma; Gokmen, Selahattin; Yorulmaz, Yavuz
    The extraction of lactic acid was done by tripropylamine (TPA) dissolved in seven single solvents (isoamyl alcohol, heptan-1-ol. hexan-1-ol. octan-1-ol, nonan-1-ol. decan-1-ol, and dodecanol). All measurements were carried out at 298.15 K. The extent to which the organic phase may be loaded with lactic acid is expressed as loading ratio, Z its value extraction efficiencies. E, and overall particular distribution coefficients, D, were calculated. Equilibrium complexation constants for(acid:amine) (1:1), (1:2) have been determined according to Bizek's approach. The maximum removal of lactic acid accomplished was about 81% with isoamyl alcohol having 1.935 mol dm(-3) initial concentration of TPA. All of the obtained data have been correlated by linear solvation energy relationship (LSER) model. LSER model results were compared with the experimental results and well agreement between them was observed. Regression coefficient (R(2)) of LSER model is 0.972. (C) 2009 Elsevier B.V. All rights reserved.
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    Reactive Extraction of Formic Acid by Amberlite LA-2 Extractant
    (Amer Chemical Soc, 2009) Uslu, Hasan; Bayat, Cuma; Goekmen, Selahattin; Yorulmaz, Yavuz
    The reactive extraction of formic acid by Amberlite LA-2 dissolved in five different esters (dimethyl phthalate, dimethyl adipate, dimethyl succinate, dimethyl glutarate, diethyl carbonate), five different alcohols (isoamyl alcohol, hexan-1-ol, octan-1-ol, nonan-1-ol, decan-1-ol), and two different ketones (diisobutyl ketone (DIBK), methylisobutyl ketone (MIBK)) as diluents as well as the extraction capacity of pure diluent alone have been studied at isothermal conditions. All measurements have been carried out at 298.15 K. The comparison of physical and reactive extractions has been studied. The loading factor, T(T), extraction efficiency, E, modified separation factor, S(F), and distribution coefficients, K(D), have been calculated. The isoamylalcohol has been found to be the most effective solvent with a maximum distribution value of 19.223. Furthermore, the linear solvation energy relationship (LSER) model equation has been obtained to calculate distribution coefficients for alcohols with an R square of 0.976.
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    Recovery of Picolinic Acid from Aqueous Streams Using a Tertiary Amine Extractant
    (Amer Chemical Soc, 2011) Tuyun, Amac Fatih; Uslu, Hasan; Gokmen, Selahattin; Yorulmaz, Yavuz
    Solvent extraction using an extractant/diluent system was determined for the recovery of picolinic acid. Trioctylamine (TOA) was used as the extractant and alcohols (isoamyl alcohol and 1-hexanol), esters (ethyl acetate and propyl acetate), and hydrocarbons (n-heptane and toluene) as the diluents. TOA gives a complex with the acid resulting in an acid-amine complex which is solvated by the diluents. On the basis of results from batch extraction experiments, a mass-action analysis was introduced for modeling extraction. The experimental results of batch extraction experiments are reported as distribution coefficients, (K(D) = (C*(PA)/C(PA))), loading factors, Z, and extraction efficiency, E. The highest synergistic extraction efficiency was found to be 96.620 for the TOA + isoamyl alcohol extractant system with a K(D) value of 28.587 and Z value of 0.588.