The operating conditions of measuring the equilibrium solubility of 4-hydroxybenzaldehyde in supercritical carbon dioxide (SCCO2) were chosen at temperatures of (308, 318, and 328) K and five pressure points from (11.0 to 21.0) MPa, while the solubility data in SCCO2 with three different cosolvents (ethanol, ethyl acetate, and acetone) at 0.04 (mol*mol 1) were obtained at 318 K and the aforementioned pressure. The solubility of 4-hydroxybenzaldehyde revealed that the presence of cosolvents could greatly improve the dissolving ability of solvent. The solubilities of solutes with five kinds of functional groups substituted for the formyl group (-CHO) of 4-hydroxybenzaldehyde have been investigated on the aspects of melting point and intermolecular force. The data of 4-hydroxybenzaldehyde in pure SCCO2 were successfully correlated with three semiempirical models (Chrastil, Mendez-Santiago, and Teja (M-S-T) and Bartle models) for a deviation of (6.82 to 8.50) %, while the data with cosolvents were calculated by three different models (modified Chrastil, modified M-S-T, and Sovova models) for a deviation of (2.98 to 8.87) %. The thermodynamic properties of 4-hydroxybenzaldehyde were investigated.
Compounds
#
Formula
Name
1
CO2
carbon dioxide
2
C7H6O2
4-hydroxybenzaldehyde
3
C2H6O
ethanol
4
C4H8O2
ethyl acetate
5
C3H6O
acetone
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.