Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The critical temperatures and pressures of phthalates with the straight side alkyl chains C6H4-1,2-[COO(CH2)nH]2 (n is from 1 to 11) as well as bis(2-ethylhexyl) phthalate have been measured. No literature data are available for the critical properties of phthalates. Since phthalates decompose at temperatures well below their critical temperatures, the method of pulse heating of a wire probe immersed into the liquid under study has been used. The method minimizes the effect of thermal decomposition because residence times are only from (0.035 to 1) ms. The experimental critical properties of phthalates have been compared with the values calculated using the group-contribution methods by Constantinou and Gani and Marrero and Gani.