Studies on extraction of thorium from nitrate solutions with quaternary ammonium halides.
Thorium can be quantitatively extracted with 0.1 M Hyamine 1622 in dichloroethane from 0.25M nitric acid/2M sodium nitrate and stripped from the organic phase with 0.1M sulphuric acid. The equilibration takes 20 min. Thorium can thus be separated from a large number of elements which are usually associated with it in monazite and in fission products of nuclear fuel.
El-Yamani
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IS
Nuclear Chemistry Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt.
Shabana
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EI