Probable mechanism of the effect of thermal history of solution on the metastable zone width

1984 ◽  
Vol 49 (9) ◽  
pp. 2045-2049 ◽  
Author(s):  
Jaroslav Nývlt
Keyword(s):  
Aqueous Solution ◽  
Thermal History ◽  
Transformation Temperature ◽  
Smooth Curve ◽  
Probable Mechanism ◽  
Metastable Zone Width ◽  
Zone Width ◽  
History Of ◽  
Metastable Zone

The metastable zone width of an aqueous solution of FeSO4 has been measured as a function of the temperature of solution overheating. For the solution overheated to a temperature lower than that of hydrate transformation, the data fit to a continuous, smooth curve, while points obtained in overheating the solution above the hydrate transformation temperature lie distinctly above the extension of the curve. Of hypotheses advanced in the literature to explain the thermal history of solution, only that based on redistribution of subcritical cluster sizes of crystallizing substance seems compatible with the observation.

Effect of thermal history of aqueous solutions of KCl on the metastable zone width

1984 ◽  
Vol 49 (3) ◽  
pp. 559-569 ◽  
Author(s):  
Jaroslav Nývlt
Keyword(s):  
Aqueous Solution ◽  
Aqueous Solutions ◽  
Thermal History ◽  
Equilibrium Solubility ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Preceding Experiment ◽  
History Of ◽  
Metastable Zone ◽  
The Given

The metastable zone width of an aqueous solution of KCI was measured as a function of the time and temperature of overheating above the equilibrium solubility temperature. It has been found that when the experiments follow close upon one another, the parameters of the preceding experiment affect the results of the experiment to follow.The results are interpreted in terms of hypotheses advanced in the literature to account for the effect of thermal history of solution. The plausibility and applicability of these hypotheses are assessed for the given cause of aqueous solution of a well soluble electrolyte.

Recent progresses on the boron species in aqueous solution: structure, phase equilibria, metastable zone width (MZW) and thermodynamic model

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Tao Zhang ◽  
Dan Li ◽  
Lingzong Meng
Keyword(s):  
Aqueous Solution ◽  
Solution Structure ◽  
Pitzer Model ◽  
Transformation Mechanism ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Model Parameterization ◽  
Comprehensive Exploitation ◽  
Development Direction ◽  
Metastable Zone

AbstractThe complexity of boron species in aqueous solution becomes the bottleneck in development of boron resources from brine. The concentrations of different boron species and transformation mechanism among boron species are mainly affected with the total boron concentration, temperatures, pH of the solution, and cations in the solution. The change trends for concentration of total boron in the complicated aqueous solution can be obtained with the phase equilibrium results, but the accurate concentration of boron species in the solution cannot be obtained. The metastable zone width (MZW) of borates and H3BO3 changed with the concentrations of impurity ions, the stirring rate, cooling rate, and original temperature for the saturated solution. The Pitzer model is the effective method to calculate the concentration of boron species. More thermodynamic data at temperatures below and above 298.15 K are needed for model parameterization. The main problems existed in the systems containing boron species were summarized, and the future development direction is also discussed. The progresses on boron species in the aqueous solution can provide fundamental data in the comprehensive exploitation of the brine boron resource.

Solubility and metastable zone width of DL-tartaric acid in aqueous solution

2012 ◽  
Vol 47 (11) ◽  
pp. 1153-1163 ◽  
Author(s):  
Xiang-Yang Zhang ◽  
Xiaofang Wang ◽  
Lin Hao ◽  
Xiaowu Yang ◽  
Leping Dang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Tartaric Acid ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Metastable Zone
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