Supercritical fluid extraction with carbon dioxide and ethylene

Horsetail (Equisetum giganteum L.) oleoresin and supercritical CO2: Experimental solubility and empirical data correlation

“…The parameter k corresponds to the number of solvent molecules, which create a complex with one single molecule of the solute. Modified versions for the Chrastil's equation were proposed in order to improve the accuracy of the data correlation and are currently available in the literature (Adachi & Lu, 1983; del Valle & Aguilera, 1988). The del Valle and Aguilera's equation is a modification of the Chrastil's model which proposes the addition of a major temperature dependency on the determination of the adjustable parameters.…”

Solubility of virgin coconut oil in supercritical carbon dioxide

“…(1), Adachi and Lu (1983) suggested that the association number (k) is dependent upon the solvent density, as given in Eq. (2):…”

Catechin sublimation pressure and solubility in supercritical carbon dioxide

“…In del Valle and Aguilera equation the variation of enthalpy of vaporization with temperature is H(T ) = R(a + 2d/T ). Adachi and Lu [35,36] proposed that the association number (referred to as Ä in the Chrastil equation) is the exponent of the density and shows the dependence of the solubility on the density. According to Adachi and Lu, if Chrastil equation fitting is not as Table 3 Solubility of (+)-catechin in SC-CO2 with 5 mol.% of co-solvent and the SC-CO2 density.…”