Studies on the extraction and determination of metal salts with isobutyl methyl ketone-XIII Extraction of thorium and uranium.
The work deals with the extraction of thorium or uranium from hydrochloric, perchloric, sulphuric or nitric acid solutions of various concentrations, or from mixed acid solutions, by means of isobutyl methyl ketone. When the extraction is made from 5-8M hydrochloric acid that is 10M in lithium chloride or from 7-8M hydrochloric acid that is 1M in magnesium chloride, uranium is extracted quantitatively (>99%), whereas thorium is hardly extracted at all.
Ichinose
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Research Institute for Iron, Steel and Other Metals, Tohoku University, Sendai-shi, Japan.