Total and partial solubility parameters of supercritical methanol

• Total (Hildebrand) solubility parameters of supercritical methanol calculated.
• Partial (Hansen) dispersion, polarity and hydrogen bonding solubility parameters calculated.
• Comments on the solubility of oils in supercritical methanol are presented.

Supercritical methanol (above 513 K and 8.1 MPa) is applicable to many processes, including biodiesel production from oils. Its total (Hildebrand) and the partial (Hansen) solubility parameters, the latter pertaining to dispersion, polarity, and hydrogen bonding interactions, are useful quantities, related to the solubilities of various solutes. They have been determined at the relevant thermodynamic states for the applications of supercritical methanol: temperatures in the range 525–675 K and pressures in the range 10–40 MPa.

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