Synthesis of 1-phenyl-3-methyl-4-thiocyanato-5- pyrazolone and Extraction of Trivalent Americium and Europium

1-phenyl-3-methyl-4-thiocyanato-5-pyrazolone(PMTCP) is synthesized and used as an extractant for the separation of trivalent americium and europium. The results show a low extraction yield for both Am and Eu within the pH range 4.80 to 5.10 in the system 0.04 mol/L NH_4AC-0.1 mol/kg NaClO_4-12.38 mmol/L PMTCP/CHCl_3, at (25±1) ℃.But this system demonstrates a preference for Am with a separation factor of 2.6. When 2,2′-bipy is added as a co-extractant, the extraction yield is greatly improved while the separation factor for Am and Eu reaches 4.0.