PDCBP对稀土的萃取及其固体配合物的研究

STUDIES ON CHARACTERISTIC OF RARE EARTH SOLID COMPLEXES AND EXTRACTION COMPOUNDS WITH PDCBP

本文研究了吡啶－２．６－双酰代－３－甲基－１－苯基－５－吡唑啉酮（ＰＤＣＢＰ，Ｈ２Ａ）对部分稀土离子的萃取行为，用多种分析测试方法证实其萃合物的组成和由稀土直接与萃取剂（Ｈ２Ａ）反应制得的固体配合物组成相同，ＲＥ（ＨＡ）２ｃｌ．它是通过吡啶氮原子和烯醇氧原子对稀土离子配位的，形成带有Ｏ—ＲＥ—Ｎ键的５元环和Ｏ—ＲＥ—Ｏ键的六元环的螯合物，使配合物比单纯含Ｏ—ＲＥ—Ｏ螯环的配合物稳定性有所增强．

The solid coordination complexes of some tare earth with 2. 6 日 pyridine dicarbonyl-bis(3-methyl-1-phenyl-pyrayolone) (PDCBP,H2A) had been prepared directly. The property of these Complexes is determined by chemical、 thermal and IR absorption spectrum analysis. Furthermore, the extraction mechanism of some rare earth by H2A has been investigated. The composition of extraction compounds is the same as that of preparing solid coordination complexes:RE(HA)2Cl. This complex is a heat stable compound because it contains O-RE-N bond.