Concentration of Transplutonium Actinides from Earth Samples.

摘要

1,158,959. Actinide separation. UNITED STATES ATOMIC ENERGY COMMISSION. 18 Dec., 1967 [13 Jan., 1967], No. 57418/67. Heading G6R. Transplutonium elements are separated from irradiated earth (for example that exposed to an underground nuclear detonation) by forming a solution of the earth containing aluminium nitrate, extracting actinides and lanthanides from the solution by contact with tributyl phosphate, back extracting with water, reextracting the elements with di-2-ethylhexyl phosphoric acid in heptane, esterifying the extract with decanol and back extraction with HCl, passing a concentrated HCl solution of the product through an anion exchange resin, precipitating hydroxides from the effluent, and redissolving the precipitate. The solution is then passed through a cation exchange resin, where by fractional elution with EtOH + HCl the following fractions are separated: transcurium elements, americium-curium, and lanthanide elements.