Ion exchange in molten salts. VI. Occluded sodium nitrate in zeolite A as an anion exchanger. Chloride-nitrate ion exchange in molten sodium (nitrate, chloride) mixtures

1973 ◽  
Vol 77 (11) ◽  
pp. 1398-1400 ◽  
Author(s):  
M. Liquornik ◽  
B. Ale ◽  
J. A. A. Ketelaar
Keyword(s):  
Ion Exchange ◽  
Sodium Nitrate ◽  
Anion Exchanger ◽  
Molten Salts ◽  
Zeolite A ◽  
Nitrate Ion ◽  
Molten Sodium

Studies on the thermodynamics and conductances of molten salts and their mixtures. Part VII. The electrical conductance of sodium chlorate and its mixtures with sodium nitrate

1968 ◽  
Vol 46 (8) ◽  
pp. 1293-1296 ◽  
Author(s):  
A. N. Campbell ◽  
E. T. van der Kouwe
Keyword(s):  
Constant Temperature ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Electrical Conductance ◽  
Sodium Chlorate ◽  
Activation Energies ◽  
Constant Composition ◽  
Temperature Range ◽  
Molten Sodium

The specific and equivalent conductances of molten sodium chlorate and of its mixtures with sodium nitrate have been determined over the temperature range 240–280 °C. The results are treated as temperature functions at constant composition and as composition functions at constant temperature. From these data, the activation energies of conductance have been derived. The results have been compared with various theoretical equations and the conclusion is made that, while melts containing lithium chlorate may be associated or complexed in some way, the sodium chlorate melts show less of such a structure and are more ionic.

Studies on the thermodynamics and conductances of molten salts and their mixtures. Part V. The density, change of volume on fusion, viscosity, and surface tension of sodium chlorate and of its mixtures with sodium nitrate

1968 ◽  
Vol 46 (8) ◽  
pp. 1279-1286 ◽  
Author(s):  
A. N. Campbell ◽  
E. T. van der Kouwe
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Sodium Chlorate ◽  
Surface Heat ◽  
Lithium Nitrate ◽  
Positive Deviation ◽  
Molten Sodium ◽  
Salt Melts

The densities, viscosities, and surface tensions of molten sodium chlorate, and of molten mixtures of sodium chlorate and sodium nitrate, as well as the change of volume on fusion, have been determined.From the dependence of molar volume on temperature and composition, it appears that the mixing of sodium chlorate and sodium nitrate is a process of dilution rather than of interaction. The viscosity of sodium chlorate is found to be much lower than that of lithium chlorate, a possible indication of greater complexity in the lithium chlorate melt. The activation energy of viscous flow for sodium chlorate is less than that of lithium chlorate. For lithium chlorate – lithium nitrate mixtures, at constant temperature, there is pronounced positive deviation from linearity, when viscosity is plotted against molar composition. For sodium chlorate – sodium nitrate mixtures, the deviation is much less marked though still positive.The surface tension of sodium chlorate is almost identical with those of lithium and potassium chlorates. The surface heat of sodium chlorate is higher than that of lithium chlorate but it still indicates some degree of covalency. The Guggenheim formula and Sokolov's rule have been applied. In contrast to melts of mixtures of lithium chlorate and lithium nitrate, the sodium salt melts would appear to have simpler constituents and to be more ionic in character.

MOLTEN SALTS. ELECTRICAL TRANSPORT IN THE SYSTEM SILVER NITRATE–SODIUM NITRATE

1952 ◽  
Vol 30 (10) ◽  
pp. 779-782 ◽  
Author(s):  
P. M. Aziz ◽  
F. E. W. Wetmore
Keyword(s):  
Silver Nitrate ◽  
Sodium Nitrate ◽  
Electrical Transport ◽  
Molten Salts ◽  
Silver Ion ◽  
Sodium Ion ◽  
Nitrate Ion ◽  
Usual Assumption ◽  
The Individual

Relative transport fractions have been measured in the molten system silver nitrate - sodium nitrate at 330° over the range 5 to 25 mole% silver nitrate. The individual fractions for silver, sodium, and nitrate ion have been assessed within limits. The results indicate that transport by silver ion is greater than that by sodium ion at the same concentration, although the latter has the smaller radius. The usual assumption that the largest ion (nitrate) does not transport charge is within the interpretation of the results.

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