Portnova, Svetlana V. published the artcileVapor Pressure, Vaporization Enthalpies, Critical Parameters, and Heat Capacities of Alkyl Glycolates, HPLC of Formula: 623-50-7, the main research area is vapor pressure vaporization enthalpy heat capacity alkyl glycolate.
Developing biotechnol. methods to produce glycolic acid and alkyl glycolates requires knowledge of thermophys. and thermodn. data. Vapor pressures of linear alkyl glycolates HO-CH2-COO-(CH2)n-H with n = 1-8 were determined by the transpiration method. Standard molar enthalpies of vaporization at exptl. temperature and at 298.15 K were derived from the temperature dependence of the vapor pressure. The critical temperatures and pressures of alkyl glycolates were measured by the pulse-heating method. The exptl. data were successfully checked for internal consistency. Molar heat capacity of atm. pressure for liquid esters was measured by the method of differential scanning calorimetry in the temperature range 303-423 K. The molar liquid heat capacities at 298.15 K and atm. pressure of alkyl glycolates were calculated from the result of this work. The measured values were used for estimating prediction capabilities of group-contribution methods by Constantinou and Gani, Marrero and Gani, and Hukkerikar et al. for critical properties and Chickos and Acree, Domalski and Hearing, and Ceriani et al. for heat capacity at 298.15 K. Results of this study could be used for the design and optimization of the chem. processes of the utilization of renewable feedstock.
Journal of Chemical & Engineering Data published new progress about Critical pressure. 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, HPLC of Formula: 623-50-7.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics