Precipitation formation of zirconium-dibutyl phosphate complex in Purex process.
Precipitation formation of zirconium-dibutyl phosphate complex in Purex process.
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Purex 工艺中沉淀形成磷酸锆-二丁基络合物。
DOI：
10.3327/jnst.26.329
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发表时间：
1989
影响因子：
1.2
通讯作者：
N. Uetake
中科院分区：
文献类型：
--
作者：
N. Uetake
将磷酸二丁酯（DBP）加入到30%TBP-70%十二烷溶剂中（DBP浓度，30-1，150 mg/l）。这些样品用于研究Zr从3 M硝酸溶液（Zr浓度，60- 4，000 mg/l）中的分布行为。实验结果表明，锆的分布主要取决于总DBP/Zr摩尔比。在DBP/Zr=2以下，随着DBP/Zr摩尔比的增加，Zr在有机相中的分布变得更大。当DBP/Zr=2以上时，Zr的分布因子达到饱和。此外，在DBP/Zr=2以上的有机相和水相之间的界面处观察到胶体沉淀。然后，为了表征沉淀，含有Zr离子的3 M硝酸溶液直接与DBP反应，并通过13 C、31 P和14 N NMR光谱分析所获得的产物。核磁共振谱表明产物为具有四种键结构的聚合物。一种为氢键结构，另一种为Zr桥联结构，其中2 ~ 4个Zr原子与Zr原子形成氢键。
Dibutyl phosphate (DBP) was added to 30% TBP-70% dodecane solvent (DBP concentration, 30–1,150mg/l). These samples were used to investigate distribution behavior of Zr from a 3 M nitric acid solution (Zr concentration, 60–4,000 mg/l). The experimental results show that the Zr distribution depended mainly on the total DBP/Zr mole ratio. Below DBP/Zr=2, the Zr distribution to the organic phase became larger as the DBP/Zr mole ratio increased. Above DBP/Zr=2, the Zr distribution factor was saturated. Moreover, colloidal precipitation at the interface between organic and aqueous phases was observed above DBP/Zr=2. Then in order to characterize the precipitation, 3 M nitric acid solution containing Zr ion was directly reacted with DBP and the obtained products were analyzed by 13C, 31P and 14N NMR spectroscopy. The measured NMR spectra indicated that the products were polymers having four kinds of bonding structures. One was a hydrogen bonded structure and the others were Zr bridged structures with two to four...