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H2BPM PBD和PM TFP协同萃取Ln(Ⅲ)的研究

Synergistic Extraction of Lanthanide by Bis(1′-Phenyl-3′-Methyl-5′-Pyrazolone-4′-Yl) Butanedione-[1,4] and 1-Phenyl-3-Methyl-4-Trifluoroacetyl-Pyrazolone-5

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【作者】 韩维和原小梅翁亚平

【Author】 HAN Wei-he,YUAN Xiao-mei,WENG Ya-ping(School of Chemistry and Materials Science,Shanxi Normal University,Xi’an 710062,China)

【机构】 陕西师范大学化学与材料科学学院陕西师范大学化学与材料科学学院 陕西西安710062陕西西安710062

【摘要】 研究了1,4-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮(H2BPM PBD,简写为H2A)和1-苯基-3-甲基-4-三氟乙酰基吡唑酮-5(PM TFP)的氯仿溶液从硝酸介质中对Ln(Ⅲ)的协同萃取。用斜率法确定了萃合物的组成为LaA.HA.PM TFP,考察了萃取剂浓度和溶液酸度对萃取机理的影响,测定了半萃取pH1/2值和萃取反应平衡常数Ks.e.,求得了反应的焓变和熵变。

【Abstract】 The synergistic extraction of lanthanide ions(La3+,Pr3+,Nd3+,Gd3+ and Dy3+) by Bis(1′-phenyl-3′-methyl-5′-pyrazolone-4′-yl) butanedione-(H2BPMPBD or H2A) with 1-phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5(PMTFP) from nitric acid solution has been studied.The synergistic coefficient for La3+is 4.76.The composition of the extracted compound was shown to be LaA·HA·PMTFP.The pH1/2values forLa3+,Pr3+,Nd3+,Gd3+and Dy3+ are 4.36,3.99,3.75,3.51 and 3.24,respectively.The extraction equilibrium constants,enthalpy change and entropy change of the reaction also have been calculated.

【基金】 国家自然科学研究基金项目资助(20573072)
  • 【分类号】TF804.2
  • 【下载频次】95
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