The solubilities of sodium p-toluenesulfonate (NaPTS), sodium sulfite (Na₂SO₃), and sodium p-methylphenoxide (NaCRS) in aqueous NaOH solutions and Na₂SO₃ in aqueous ethanol solutions were investigated using a dynamic method over the temperature range from 277 to 341 K at atmospheric pressure. The experimental results showed that the solubilities of NaPTS, Na₂SO₃, and NaCRS in aqueous NaOH solutions and Na₂SO₃ in aqueous ethanol solutions decreased distinctly with the solute-free mass fraction of NaOH (w₄⁰) and ethanol (w₅⁰). Further, there were obvious transition points in the solubility–temperature curves of NaPTS and Na₂SO₃ in aqueous NaOH solutions, and the transition points shifted to lower temperature as w₄⁰ rose. The forming of transition point was due to the different equilibrium solid phase, which was revealed by characterization of the equilibrium solid phase. But the transition points in the solubility–temperature curves of Na₂SO₃ in aqueous ethanol solutions remained constant at different w₅⁰ values. As the temperature rose, the solubilities of NaPTS and NaCRS in aqueous NaOH solutions increased, while the solubilities of Na₂SO₃ increased at first and then decreased after the transition points in both aqueous NaOH and ethanol solutions. The experimental data were correlated with the electrolyte nonrandom two-liquid (E-NRTL) model, and model parameters were determined simultaneously. On the basis of the solubility difference between Na₂SO₃ and NaCRS, a new process for reusing the NaOH in the alkali fusion reaction residue was proposed theoretically.

中文翻译：

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测定与关联钠的溶解度p甲苯磺酸盐，亚硫酸钠和钠p -Methylphenoxide在氢氧化钠溶液和亚硫酸钠在乙醇水溶液

在温度范围内使用动力学方法研究了对甲苯磺酸钠（NaPTS），亚硫酸钠（Na ₂ SO ₃）和对甲基苯酚钠（NaCRS）在NaOH水溶液中的溶解度以及Na ₂ SO ₃在乙醇水溶液中的溶解度在大气压下范围从277到341K。实验结果表明，NaPTS，Na ₂ SO ₃和NaCRS在NaOH水溶液中的溶解度以及Na ₂ SO ₃在乙醇水溶液中的溶解度随NaOH（w ₄ ⁰）和乙醇（w ₅ ⁰）。此外，在NaPTS和Na ₂ SO ₃在NaOH水溶液中的溶解度-温度曲线中，存在明显的转变点，并且随着w ₄ ^0的升高，转变点转移到较低的温度。转变点的形成是由于平衡固相的不同，这通过平衡固相的表征得以揭示。但是在不同的w ₅ ⁰条件下，Na ₂ SO ₃在乙醇水溶液中的溶解度-温度曲线中的转变点保持恒定。价值观。随着温度的升高，NaPTS和NaCRS在NaOH水溶液中的溶解度增加，而Na ₂ SO ₃的溶解度首先增加，然后在NaOH和乙醇水溶液中的转变点后降低。实验数据与电解质非随机两液（E-NRTL）模型相关，并同时确定模型参数。基于Na ₂ SO ₃与NaCRS之间的溶解度差异，从理论上提出了一种在碱熔反应残余物中再利用NaOH的新方法。