The solvent dependence of the solubility of organic solids and solubility parameter theory: investigation by means of an organic pigment

Characterization of Asphaltene Fractions: Distribution, Chemical Characteristics, and Solubility Behavior

“…Using this approach and extrapolating to hydrogen content zero, the solubility parameter for a disordered graphitic material would be 20.7 MPa 0.5 in comparison to 27.8 MPa 0.5 obtained using the third rule and an estimate of the liquid density. Lower solubility parameter values might be a consequence of the choice of solvents selected to determine the solubility parameter . As it was mentioned before, It is well-known that solubility parameter values tend to vary when measured using different solvents …”

“…Lower solubility parameter values might be a consequence of the choice of solvents selected to determine the solubility parameter. 42 As it was mentioned before, It is well-known that solubility parameter values tend to vary when measured using different solvents. 34 However, even though there are differences in values, there is a clear correlation between both sets as shown in Figure 12, indicating that a calibration of the solubility profile test in terms of density/third rule is possible and can be useful for the fast screening of properties of asphaltenes in a crude oil.…”

Solubility of N,N′-Di(1-naphthyl)-N,N′-diphenyl Benzidine (NPB) in Various Organic Solvents: Measurement and Correlation with the Hansen Solubility Parameter

“…The Hansen solubility parameter (HSP) is a measure of solubility and dispersivity and has been widely used in the fields of polymers, asphaltenes, pigments, and nanomaterials. − ,,,− The solubility parameter in its original Hildebrand form δ (MPa 1/2 ) is defined as the square root of the cohesive energy density: where u (J mol –1 ) is the molar cohesive energy and v (cm 3 mol –1 ) is the molar volume. The closer the δ values of the solute and solvent species are to each other, the higher the solubility is expected to be.…”

“…It is thus desired to describe the solubility explicitly as a function of the solute–solvent distance R a . For example, Grubenmann, Mannistu et al, and Lindvig et al incorporated the HSP distance with the Flory–Huggins model for quantitative descriptions of the solubilities of pigments, asphaltenes, and polymers. In recent years, Sato et al measured the solubility of oxygen gas in 21 organic solvents and expressed the solubility as a function of R a …”

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

“…Solubility parameters have been demonstrated to have great potential to characterizethe solubility and other properties of petroleum and fossil solids and liquids both experimentally and theoretically [16][17][18][19]. Several authors have reportedthat the metallocompounds of V and Ni become separated from each other during the process of isolation with pyridine/water extracts [8].…”