A static method was used to measure the critical temperature, critical pressure, and critical volume on three compounds:  ethyl thioacetate, methoxybenzene, and 2-methoxyethanol. A flow method was used to measure the critical temperature and critical pressure on eleven compounds:  acrylonitrile, 1,4-butanediol, 2-(2-butoxyethoxy)ethyl acetate, γ-butyrolactone, cyclohexanol, 1,2-ethanediamine, 2-(2-ethoxyethoxy)ethanol, 2-(2-ethoxyethoxy)ethyl acetate, 1-methoxy-2-propanol, 2-(2-methoxyethoxy)ethanol, and 2-nonanone.

A new flow method and a traditional static method have been employed to obtain the critical temperatures and pressures for 11 compounds: 1,1-dimethylpropyl methyl ether, 1,1-dimethylethyl ethyl ether, toluene, ethylbenzene, (l-methylethyl)benzene, 1-methylethyl ethanoate, 2-pentanone, 2-hexanone, 2-heptanone, hexafluoroethane, and propene. Accurate critical densities were also obtained using a static method. The critical properties of stable compounds appear to be accurately determined by both methods. The flow method allows the determination of accurate critical properties for more reactive or thermally unstable compounds.

Vapor-liquid equilibrium measurements have been performed by the total-pressure method on the , -dlmethylformamlde (DMF)/1-butanol system at 65 and 125 °C. The data were reduced to equilibrium phase compositions by using the Wilson activity coefficient equation to model the liquid phase and the Soave equation of state to model the vapor phase.

Vapor−liquid equilibrium measurements using the PTx method have been made on three binary mixtures:  difluoromethane/hydrogen chloride, cis-1,3-dichloropropene/trans-1,3-dichloropropene, and pyrrole/water. Each binary mixture was studied at two temperatures. Equilibrium vapor and liquid-phase compositions were derived from the PTx data using the Soave−Redlich−Kwong equation of state to represent the vapor phase and the NRTL activity coefficient model to represent the liquid phase. The pyrrole/water system exhibited a region of immiscibility at the lower temperature at which it was studied. Karl Fischer titration was used to determine the compositions of the equilibrium liquid phases.

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