Liquid–liquid equilibrium of systems containing triacylglycerols (canola and corn oils), diacylglycerols, monoacylglycerols, fatty acids, ester and ethanol at T/K=303.15 and 318.15

Liquid-Liquid Equilibrium of Systems Composed of Soybean Oil + Monoacylglycerols + Diacylglycerols + Ethyl Oleate + Oleic Acid + Ethanol at 303.15 and 318.15 K

“…Figure 1 shows the experimental data for the system (soybean oil + ethyl oleate + oleic acid + ethanol) at 303.15 and 318.15 K. It can be seen that an increase in temperature leads to a decrease in the two-phase region, indicating an improvement in the mutual solubility of the soybean oil and ethanol. This behavior has been previously reported in the literature (Mazutti et al, 2013;Bessa et al, 2015;Ferreira et al, 2015;Shiozawa et al, 2015).…”

Liquid–Liquid Equilibrium Data for Systems Involving Triacylglycerols from (Soybean, Cottonseed, or Rice Bran) Oil + Partial Acylglycerols + Anhydrous Ethanol at T = 303.2 and 318.2 K

“…23 The deviations using the UNIFAC-HIR parameter set decreased in half probably because Hirata et al 23 adjusted the new parameter set for systems involving fatty compounds. Decreased deviation values using the UNIFAC-HIR parameter set were also reported by Bessa et al, 21 Ferreira et al, 22 and Shiozawa et al 25 which evaluated more complex systems the results estimated by the UNIFAC were not consistent with the experimental data for both parameter sets (UNIFAC-LLE and UNIFAC-HIR), in which the compositions of ethanol and MAG in OP were underestimated, whereas the DAG compositions in SP were overestimated. Moreover, estimated values using the UNIFAC-HIR parameters set revealed the preference of DAG to SP, oppositely to the experimental data.…”

“…28 The same behavior was also observed in other similar systems. 21,22,25 All individual components from the vegetable oils and from the partial AGs mixture were considered in the UNIFAC model approach. Therefore, 47 different components were considered in the modeling.…”

“…In our systems, the long carbon chain of TAGs may be associated with the low solubility of TAG in ethanol.Besides that, MAG and DAG exhibited opposite behavior, since MAGs contain higher number of hydroxyl groups than DAGs, increasing their preference for the solvent phase, which can be explained by the intermolecular forces of hydrogen bonds 28. The same behavior was also observed in other similar systems 21,22,25. All individual components from the vegetable oils and from the partial AGs mixture were considered in the UNIFAC model approach.…”

“…The mass balance proposed by Marcilla et al and adopted to fatty systems ,− was used to verify the quality of the experimental results in which deviations on the global mass balance lower than 0.5% certify the good quality of the experimental data . The global mass balance deviation is calculated by the difference between the sum of the calculated masses of SP and OP with the total mass used in the overall composition.…”