Related Experiment Video
Updated: May 30, 2025

Ammonia Synthesis at Low Pressure
Published on: August 23, 2017
Mutual solubility of ammonium perrhenate in solutions containing ammonium salts
Szymon Orda1, Michał Drzazga2, Katarzyna Leszczyńska-Sejda2
1ŁUKASIEWICZ-Institute of Non-Ferrous Metals, Sowińskiego 5, 44-100, Gliwice, Poland. szymon.orda@imn.lukasiewicz.gov.pl.
Abstract:
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.
More Related Videos
06:35Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
Related Concept Videos
Basicity of Aliphatic Amines
To measure the basicity of amines, two conventions are generally used. The first defines Kb as the basicity constant for the deprotonation reaction of water by the amine, as presented in Figure 1. Conventionally, lower Kb indicates...
Weak Base Solutions
Solubility of Ionic Compounds
Structure of Amines
Common Ion Effect
Determining the pH of Salt Solutions