Мақола

Solubility of 4-Hydroxybenzaldehyde in Supercritical Carbon Dioxide with and without Cosolvents

Junsu JinBeijing Key Laboratory of Membrane Science and Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaYiwei WangBeijing Key Laboratory of Membrane Science and Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaHai-fei ZhangDepartment of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United KingdomXing FanBeijing Key Laboratory of Membrane Science and Technology, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, ChinaHao WuHigh-Tech Research Institute, Beijing University of Chemical Technology, Beijing 100029, China

2014en

ABI

Аннотация

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, Méndez-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.

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DOI: 10.1021/je401082x

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