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In this study, the extracted oil of Pistacia lentiscus L. the Tunis region was extracted using supercritical carbon dioxide (SC-CO2) extraction containing different major components in the oil such as α-pinene (32%) and terpinene-4-ol (13%). The investigation of the effect of different variables on the extraction yield with 5% level of confidence interval showed that the CO2 pressure was the main significant variable to influence the oil yield. In order to better understand the phenomena, three parameters were considered to adjust all parameters of broken and intact cell (BIC) model: grinding efficiency (G), the internal mass transfer parameter ( k S a 0 ), and the external mass transfer parameter ( k f a 0 ), which were estimated by experimental extraction curves to calculate the diffusion coefficient. From an economic point of view, we found out that the high cost of production of the extracted oil was due to the low mass of extracted oil obtained from this type of plant.

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This study examines the solubility of benzamide (BZA), correlating the solubility with the theoretical models and calculating the thermodynamic property parameters. In this work, the gravimetric method was utilized to determine the solubility of benzamide in three individual solvents (methanol, ethanol, 1-propanol, and ethyl acetate), as well as in (ethanol + ethyl acetate) (methanol + ethyl acetate) and (1propanol + ethyl acetate) binary mixed solvents. The results demonstrated that the solubility of benzamide increased first and then decreased with increasing mole fractions of methanol/ethyl acetate and ethanol/ethyl acetate at the same temperature. Also, four co-solvency models (Jouyban−Acree, Jouyban−Acree-van't Hoff, Jouyban Acree− Apelblat, and Ma models) were used to estimate the obtained experimental data of benzamide in pure and binary mixed solvents. The correlation results show that different models have a great prediction effect for the various systems investigated. Moreover, the van't Hoff and Gibbs equations were adopted to study the thermodynamic properties of the dissolution process, indicating that the dissolution of benzamide is an endothermic and nonspontaneous process. Furthermore, using the Inverse Kirkwood−Buff Integral approach, the preferential solvation mechanism of BZA in binary mixed solvent was determined.