Solubilities of Isophthalic Acid in Acetic Acid+Water Solvent Mixtures

doi:10.1016/S1004-9541(13)60520-0

Abstract

Abstract: The solubilities of isophthalic acid (1) in binary acetic acid (2)+water (3) solvent mixtures were determined in a pressurized vessel. The temperature range was from 373.2 to 473.2K and the range of the mole fraction of acetic acid in the solvent mixtures was from x₂ 0 to 1. A new method to measure the solubility was developed, which solved the problem of sampling at high temperature. The experimental results indicated that within the temperature range studied, the solubilities of isophthalic acid in all mixtures showed an increasing trend with increasing temperature. The experimental solubilities were correlated by the Buchowski equation, and the calculate results showed good agreement with the experimental solubilities. Furthermore, the mixed solvent systems were found to exhibit a maximum solubility effect on the solubility, which may be attributed to the intermolecular association between the solute and the solvent mixture. The maximum solubility effect was well modeled by the modified Wilson equation.

Key words: solubility, isophthalic acid, acetic acid, water, solid-liquid equilibrium

摘要： The solubilities of isophthalic acid (1) in binary acetic acid (2)+water (3) solvent mixtures were determined in a pressurized vessel. The temperature range was from 373.2 to 473.2K and the range of the mole fraction of acetic acid in the solvent mixtures was from x₂ 0 to 1. A new method to measure the solubility was developed, which solved the problem of sampling at high temperature. The experimental results indicated that within the temperature range studied, the solubilities of isophthalic acid in all mixtures showed an increasing trend with increasing temperature. The experimental solubilities were correlated by the Buchowski equation, and the calculate results showed good agreement with the experimental solubilities. Furthermore, the mixed solvent systems were found to exhibit a maximum solubility effect on the solubility, which may be attributed to the intermolecular association between the solute and the solvent mixture. The maximum solubility effect was well modeled by the modified Wilson equation.

关键词: solubility, isophthalic acid, acetic acid, water, solid-liquid equilibrium

CHENG Youwei, HUO Lei, LI Xi . Solubilities of Isophthalic Acid in Acetic Acid+Water Solvent Mixtures[J]. Chin.J.Chem.Eng., 2013, 21(7): 754-758.

成有为, 霍磊, 李希. Solubilities of Isophthalic Acid in Acetic Acid+Water Solvent Mixtures[J]. Chinese Journal of Chemical Engineering, 2013, 21(7): 754-758.

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