HIGH-PRESSURE PHASE-EQUILIBRIA AND DENSITIES OF THE BINARY-MIXTURES CARBON-DIOXIDE OLEIC-ACID, CARBON-DIOXIDE METHYL MYRISTATE, AND CARBON-DIOXIDE METHYL PALMITATE AND OF THE TERNARY MIXTURE CARBON-DIOXIDE METHYL MYRISTATE METHYL PALMITATE

Densities and thermodynamic equilibrium compositions of both the gas a nd the liquid phases were determined for binary mixtures of carbon dio xide and oleic acid, methyl myristate, and methyl palmitate, and for t he ternary system carbon dioxide-methyl myristate-methyl palmitate at pressures up to 130 bar. Binary equilibria and densities were measured at 40-degrees-C, 50-degrees-C, and 60-degrees-C; the ternary system w as studied at 40-degrees-C and at 50-degrees-C. High-pressure densitie s were also recorded for all pure components. The apparatus used for t he experiments consisted of a high-pressure view cell through which bo th phases were recirculated. Compositions were determined from samples taken with the help of six-way valves. Densities were measured with a vibrating sensor tube. Solubilities increase with pressure at a given temperature; however, the separation of a mixture of methyl myristate and methyl palmitate becomes less selective. All numerical values are given in full detail.