The Distribution of Thorium Nitrate between Water and Certain Alcohols and Ketones

Abstract

The effectiveness of the density-composition curve as an analytical tool is sufficient to establish composition to about 0.5 unit or better on the atomic per cent scale. REFERENCES

Extraction

“…A number of papers on the use of extraction in the inorganic field have appeared recently. The method has been applied to the separation of certain compounds of iron {20, 44), antimony (9), rhenium {41), gold {23), uranium {26), zirconium and hafnium (4, 18), cerium {42), nickel and cobalt {11), and thorium (33). Reasoning on the basis of the progress which has been made in the field of organic chemistry in the separation of closely related homologs or isomers, one can predict that much will be done by suitable countercurrent extraction and with the proper understanding of solvents.…”

Thorium Nitrate. III. The Distribution of Thorium Nitrate between Water and Certain Esters and the Nature of the Distribution Equilibrium.

“…The distribution of thorium nitrate between water and three types of organic solvents has been shown (5,6) to be described by a relation of the form: where Th(N03)4 was regarded as a single molecular species. On this empirical basis, the exponent a was between 4.8 and 5.5 for certain alcohols, and between 7 and 8 for methyl ketones.…”

“…We previously correlated (5) the high solubility of thorium nitrate in certain organic solvents with the oxygen-containing groups in such solvents. Since increased steric hindrance around such a group appreciably lowers the solubility, other factors being constant, we attributed the solubility specifically to some interaction between these oxygen atoms in the solvent molecule and the solute nolecule as a whole.…”

Radiochemical Determination of Cerium in Fission

“…Rothschild et cd. (10) observed that thorium nitrate is extracted by methyl isobutyl ketone (hexone). A patent has been issued to Pitzer (9) for a procedure in which cerium in trace concentration is extracted by methyl isobutyl ketone from aqueous media containing dichromate as the oxidizing agent.…”