IMPURITIES THAT CAUSE DIFFICULTY IN STRIPPING ACTINIDES FROM COMMERCIAL TETRAALKYLCARBAMOYLMETHYLPHOSPHONATES

摘要

Diphenyl[(diethylcarbamoyl)methyl]phosphotiate (DHDECMP) in diethylbenzene extracts actinides well from 6 M nitric acid solution, but commercially available DHDECMP contains impurities which interfere with stripping the actinides from the organic extract. DHDECMP purified by molecular distillation does not contain these impurities, but the pot residue contains increased concentrations of them. Heating the purified DHDECMP causes the formation of products which interfere with stripping in the same way, suggesting that high temperatures employed in the manufacture of DHDECMP may produce the offending impurities.