The anion exchange behaviour of thorium, protactinium, uranium and other elements representing the alkali, the alkaline earth and the rare earth group has been investigated in various conditions of hydrochloric acid and acetic acid mixture compositions. Adsorption measurements were made at room temperature with the solution composition varying from pure aqueous hydrochloric acid to 90% acetic acid and 10% hydrochloric acid, also changing the acidity of the latter from 1 Ν to 12 Ν within its volume rate of the total solution. The possibility of a simultaneous separation of thorium, protactinium and uranium, also from other elements, has been demonstrated.
ZusammenfassungEs wurde das Verhalten von Thorium, Protactinium, Uran und Elementen, die der Alkali, Erdalkali und der Gruppe der seltenen Erden angehören, an Anionenaustauschern unter verschiedenen Bedingungen In Mischungen von Salzsäure und Essigsäure untersucht. Es wurden adsorbierende Messungen bei Zimmertemperatur durchgeführt mit Lösungen, die variieren von reiner Salzsäure bis zu Mischungen von 90% Essigsäure und 10% Salzsäure. Die Möglichkeiten einer gleichzeitigen Trennung von Thorium, Protactinium, Uran und den anderen Elementen wird gezeigt.
ResumeOn a etudie le comportement sur echangeurs d'anions du thorium, du protactinium, de l'uranium, d'61ements alcalins, alcalino-terreux et des terres rares, dans diffSrents milieux constitues par des melanges d'acide chlorhydrique et d'acide formique. Des mesures d'adsorption ont 6te eifectuees ä la temperature ambiante, dans des solutions variant de l'acide chlorhydrique pur a un melange contenant 90% d'acide formique et 10% d'acide chlorhydrique. On a demande la possibility d'une separation simultanee du thorium, du protactinium, de l'uranium et d'autres elements.
Study has been made to prove and elaborate the conditions of the production of 231 Pa and 282 U by reactor neutron irradiation of 280 Th mixed with 232 Th as a starting material. The build-up characteristics of all transmuted nuclides from either target nuclide and also from the 231 Pa as an intermediate target are systematically demonstrated with respect to the neutron flux, the epithermal index and the irradiation time. By thorough evaluation of all factors associated in the multiple transmutation reactions, it appears possible to establish the production scheme to increase the production yields of 231 Pa and 282
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