This article presents the results of equilibrium tests regarding the development of a new waste-free technology for converting ammonium nitrate(V) to potassium nitrate(V) using potassium metavanadate. To establish the best conditions for disposing of postfiltration liquor from the soda-chlorine-saltpeter (SCS) production process, a detailed analysis of the isotherm in the five-component system KNO₃ + NH₄NO₃ + KVO₃ + NH₄VO₃ + H₂O was required. Equilibrium tests were carried out by isothermal saturation of solutions method at temperatures of 293.15 and 313.15 K. The results obtained were used to plot solubility isotherms using the Jänecke method. The maximum conversion efficiencies of ammonium nitrate(V) to ammonium metavanadate are 97.53% at T = 293.15 K and 98.69% at T = 313.15 K based on the data for the triple point P₁. These results, along with literature data, were used to prepare a material balance for the proposed technological concept for the disposal of postfiltration liquor using the SCS method.

中文翻译：

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五组分 KNO3 + NH4NO3 + KVO3 + NH4VO3 + H2O 体系在 293.15 和 313.15 K 温度下的溶解度测试

本文介绍了开发利用偏钒酸钾将硝酸铵 (V) 转化为硝酸钾 (V) 的新型无废物技术的平衡测试结果。为了建立处理苏打氯硝石（SCS）生产过程中过滤后废液的最佳条件，对五组分体系 KNO ₃ + NH ₄ NO ₃ + KVO ₃ + NH ₄ VO ₃中的等温线进行了详细分析需要+H ₂ O。通过溶液等温饱和法在 293.15 和 313.15 K 的温度下进行平衡测试。所得结果用于使用 Jänecke 方法绘制溶解度等温线。根据三相点 P ₁的数据，硝酸铵（V）到偏钒酸铵的最大转化效率在T = 293.15 K 时为 97.53%，在T = 313.15 K 时为 98.69% 。这些结果与文献数据一起用于为所提出的使用 SCS 方法处理过滤后液体的技术概念准备物料平衡。