Liquid-Liquid Equilibrium Data of the Ternary Mixture of (Water + Phosphoric Acid + Heptyl Acetate) at 298.2 K and ≈ 102 kPa

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-09-01 DOI:10.22036/PCR.2020.224503.1746

S. Shekarsaraee, A. Gilani, M. Pir

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Abstract

Solubility data and tie-line points were experimentally determined for the ternary system (water + phosphoric acid + Heptyl acetate) at T = 298.2 K and ambient pressure. The cloud point method was used to measure the immiscibility region. Type-1 LLE behavior was observed for the investigated system and the plait point data were calculated using the Treybal’s method. The compositions of both aqueous and esteric layers were determined by using of acid-base titration, HPLC method and mass balance equation. The Othmer–Tobias and Hand equations were applied to prove the reliability of tie-line data. Obtained tie-line points were then correlated using the UNIQUAC model and the rmsd results showed that the measured points were satisfactorily regressed by the thermodynamic model. To evaluate the ability of the studied solvent for purification of phosphoric acid, distribution coefficients and separation factors were calculated over the biphasic area. Separation factors were greater than one in all investigated feeds of phosphoric acid for the studied system. Heptyl acetate showed the highest separation factors between all the investigated n-alkyl acetate esters.

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(水+磷酸+乙酸庚酯)三元混合物在298.2 K和≈102 kPa下的液-液平衡数据

在T = 298.2 K和环境压力下，实验测定了三元体系(水+磷酸+乙酸庚酯)的溶解度数据和系线点。采用云点法测量非混相区域。观察了被调查系统的1型LLE行为，并使用Treybal方法计算了辫点数据。采用酸碱滴定法、高效液相色谱法和质量平衡方程测定了水层和三元层的组成。用other - tobias方程和Hand方程证明了联络线数据的可靠性。利用UNIQUAC模型对得到的联络线点进行关联，rmsd结果表明，用热力学模型对测点进行了满意的回归。为了评价所研究的溶剂对磷酸的净化能力，计算了两相区域内的分配系数和分离系数。研究体系中所有磷酸饲料的分离系数均大于1。乙酸庚酯在各正烷基酯之间的分离系数最高。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

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