【摘要】 采用流动法研究和测定了苯甲酸在35、50℃下,10.0—30.0MPa范围内,在纯超临界CO2和含醇系列夹带剂的超临界CO2中的溶解度。实验研究表明,醇系列夹带剂的加入均可明显增大苯甲酸的溶解度,但4种醇的增强作用随着碳链的增加而略有减弱。论述了温度、压力对溶解度的影响,并用Sovova方程对实验数据进行了回归。更多还原

【Abstract】 The solubility of benzole acid in supercritical carbon dioxide with ethanol, propanol, butanol and pentanol as co-solvent were measured respectively over 10.0 - 30.0 MPa and 35℃ and 50℃ . Results show that the cosolvent of ethanol, propanol, butanol and pentanol added into the supercritical carbon dioxide can distinctly enhance the solubility of benzoic acid, and the enhancement will slightly weaken as the increase of carbonic atomicity of the cosolvent. The effects of temperture and pressure on the solubility were also discussed, and the measured mole fractions of benzoic acid in supercritical carbon dioxide were correlated with the model presented by Sovova equation.更多还原