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<p>Mutual solubility measurements were carried out for three multi-component systems of ammonium perrhenate (NH<sub>4</sub>ReO<sub>4</sub>) and one of the ammonium salts (NH<sub>4</sub>NO<sub>3</sub>, NH<sub>4</sub>Cl or (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub>) dissolved in water. Experiments were carried out using the isothermal solution saturation method at 293.15K. The concentrations of the reagents in saturated solutions in each system were determined by analytical methods. On the basis of the results, the solubility isotherms were determined. The phase diagrams were prepared for each investigated system. The eutonic point and the solubility isotherms of both tested salts are marked on each phase diagram. The data provided were implemented to predict the composition of the solid phase in the purification process of crude ammonium perrhenate (CAP) by recrystallisation from solutions of ammonia salts. Moreover, the efficiency of salting-out for tested systems may be determined.</p>

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Mutual solubility of ammonium perrhenate in solutions containing ammonium salts

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月28日

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  • Szymon Orda,
  • Michał Drzazga,
  • Katarzyna Leszczyńska - Sejda,
  • Mateusz Ciszewski,
  • Dorota Kopyto,
  • Alicja Kocur,
  • Marcin Lemanowicz

摘要

Mutual solubility measurements were carried out for three multi-component systems of ammonium perrhenate (NH4ReO4) and one of the ammonium salts (NH4NO3, NH4Cl or (NH4)2SO4) dissolved in water. Experiments were carried out using the isothermal solution saturation method at 293.15K. The concentrations of the reagents in saturated solutions in each system were determined by analytical methods. On the basis of the results, the solubility isotherms were determined. The phase diagrams were prepared for each investigated system. The eutonic point and the solubility isotherms of both tested salts are marked on each phase diagram. The data provided were implemented to predict the composition of the solid phase in the purification process of crude ammonium perrhenate (CAP) by recrystallisation from solutions of ammonia salts. Moreover, the efficiency of salting-out for tested systems may be determined.