1,9-双(1'-苯基-3'-甲基-5'-氧代吡唑-4'-基)壬二酮-[1,9]与三辛基氧膦对镧(Ⅲ)、镝(Ⅲ)的协同萃取

Synergistic Extraction of Lanthanum(Ⅲ) and Dysprosium(Ⅲ) with 1,9 Bis(1 phenyl 3 methyl 5 oxopyrazol 4 yl) nonanedione and Trioctylphosphine Oxide

研究了１，９－双（１－苯基－３－甲基－５－氧代吡唑－４－基）壬二酮－［１，９］（ＢＰＭＰＮＤ，Ｈ２Ａ）与三辛基氧膦（ＴＯＰＯ，Ｂ）的氯仿溶液，从硝酸介质中对Ｌａ（Ⅲ）、Ｄｙ（Ⅲ）的协同萃取，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成为ＬａＡ·ＨＡ·Ｂ和ＤｙＡ·ＨＡ·Ｂ，计算了协萃平衡常数，研究了温度对协萃反应的影响，用萃取法制得了固态协萃合物，并对其组成、ＩＲ及ＴＧ－ＤＴＡ进行了研究．

The synergistic extraction of La(Ⅲ) and Dy(Ⅲ) from nitrate medium with 1,9 bis(1 phenyl 3 methyl 5 oxopyrazol 4 yl) nonanedione (BPMPND or H 2A) and trioctylphosphine oxide (TOPO or B) in chloroform has been studied at 25℃. Method of constant molarity was used to study the synergistic effect. The acidic synergistic extraction coefficient and the synergistic extraction coefficient of La(Ⅲ) and Dy(Ⅲ) were calculated. By using slope analysis method, the compositions of the synergistic extracted species have been shown to be LaA·HA·B and DyA·HA·B and their synergistic extraction equilibrium constants were determined. The influence of temperature on the synergistic extraction distribution ratio was studied in extraction of dysprosium(Ⅲ). The solid synergistic species were obtained and their compositions have been analyzed and explored through elemental analysis, IR, TG and DTA.