Solubilities of methyl oleate, oleic acid, oleyl glycerols, and oleyl glycerol mixtures in supercritical carbon dioxide

Abstract

Solubility isotherms for oleic acid and methyl oleate as well as mono‐, di‐, and trioleylglycerol (MO, DO, and TO) in supercritical fluid CO 2 at 50 and 60°C are reported. Partition coefficients for quaternary (MO‐DO‐TO‐CO 2 ) mixtures were obtained at 60°C at pressures ranging from 172 to 309 bar. Data indicate that diolein, and especially monoolein, exhibit positive deviation from ideal behavior, possibly due to intermolecular hydrogen bonding. Supercritical fluid CO 2 appears to be a good media for removal of mono‐ and diacylglycerol by‐products from synthetic triglyceride reaction mixtures at moderate temperatures.