Measurements of Density and Refractive Index of Soybean Oil + Short Aliphatic Alcohols

Abstract

Densities and refractive indices of binary mixtures containing soybean oil + (methanol, ethanol, 1-propanol, 2-propanol, or 1-butanol) have been measured from 283.15 to 298.15 K at atmospheric pressure, over the complete homogeneous composition range. Derived properties, such as excess molar volumes, partial excess molar volumes, and excess isobaric compressibilities, have been determined. Values of physical properties were compared with the results obtained by different prediction methods; the results were analyzed according to the non-ideality and large differences of molecular characteristics of the compounds included in this study.

Prediction of the Partition Coefficient for Acetic Acid in a Two‐Phase System Soybean Oil‐Water

“…For water and acetic acid the properties were taken from the literature [15,16]. The critical temperature, acentric factor and characteristic volume of oil were determined by fitting the literature data for the oil density and density of the binary oil-alcohol mixtures [17]. The Marquardt method of the least squares sum worked well for this processing [18].…”

“…The Marquardt method of the least squares sum worked well for this processing [18]. The critical pressure of oil was calculated using the Ambrose method of group contributions [16], as it could not be determined by fitting the literature data because the density of mixtures is not influenced by critical pressure of oil at temperatures and pressure quoted in the literature [17]. The critical temperatures, critical pressures and acentric factors of alcohols (methanol, ethanol, 1-propanol, 2-propanol and 1-butanol) were taken from the literature [16], while their characteristic volumes were determined from the densities at 25°C given in the literature [17].…”

“…The calculated values were: 635.0 K, 1.652 and 4.475 m 3 /kmol, respectively. For fitting, 317 points were taken from the literature [17]. The COSTALD model predicted the values of densities well, with average relative error (ARE) of 0.66%.…”

Mixing thermodynamics of edible olive or soybean oils with ketones (2-butanone, 3-pentanone and 4-methyl-2-pentanone) at different temperatures

“…It is not always possible to obtain proper values, especially when concerned with complex mixtures at non-standard conditions. In the scope of investigating physical properties related to equipment design in edible oils industry and new environment friendly procedures of extraction and refining, as a continuation of previous studies,we present the temperature dependence of the density and refractive indexof ketones (butanone, 3-pentanone and 4-methyl-2-pentanone) + natural olive and soybean oil over the range from 283.15 to 298.15 K at atmospheric pressure, as a function of molar fraction.This work is a part of a wider project related to the study of phase equilibria and thermodynamics of mixtures of edible oils and organic solvents [19][20][21][22][23][24][25][26][27][28][29][30][31], in order to provide a better understanding concerning the factors which contribute to the special behaviour enclosing triglycerides into mixtures, and improve the stage of winterization of edible oil industry. The study is carried out at low temperatures because modern technologies in oil processing use cool techniques to improve the quality of seeds oils, avoiding thermal degradation and organoleptic modifications.…”

Reducing losses to maize stored on farms in East Africa using hermetic storage

“…The computed average molar mass of soybean oil is 873.01 g·mol (Gonzalez, et al 2006) or 872.03 g.mol, while the molar mass of free fatty acids in oil is about 834 g (or 278*3) mol -1 (Bhatt, 2004). This is because when 3 moles of fatty acids react with 1 mole of glycerol (molar mass=92.09), 1 mole of triglyceride and 3 moles of water are produced, giving an average molar mass of soybean oil equals 834 g ((278*3)+92.09-(3*18.02)) (Bhatt, 2004).…”