...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Formation of W/O microemulsions in the extraction of Nd(III) by bis(2,4,4-trimethylpentyl) dithiophosphinic acid and its effects on Nd(III) coordination
【24h】

Formation of W/O microemulsions in the extraction of Nd(III) by bis(2,4,4-trimethylpentyl) dithiophosphinic acid and its effects on Nd(III) coordination

机译：双（2,4,4-三甲基戊基）二硫代次膦酸萃取Nd（III）中W / O微乳的形成及其对Nd（III）配位的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The formation of water-in-oil (W/O) microemulsions during the extraction of Nd(III) by bis(2,4,4-trimethylpentyl) dithiophosphinic acid (also known as purified Cyanex 301, denoted as HC301) was studied. Results from the measurement of the concentration of Nd(III), Na+ and NO3- in the organic phase, IR spectroscopy, and dynamic light scattering (DLS) all indicated that W/O microemulsions could form as the ratio of the neutralized ligand to Nd(III) in the aqueous phase is over 3 : 1. The coordination environment of Nd(III) in the extracted complexes was monitored by absorption spectroscopy and extended X-ray absorption fine structure (EXAFS) and was found to vary significantly with the formation of W/O microemulsions. When only 10% of HC301 was neutralized, with no formation of W/O microemulsions, the inner coordination shell of Nd(III) in the organic phase was occupied dominantly by sulfur atoms from HC301. As HC301 was further neutralized, the coordinated sulfur atoms around Nd(III) were replaced gradually by the oxygen atoms from water. This work provides further insights into the extraction mechanism in the extraction system using purified Cyanex 301 as an extractant.
机译：研究了双（2,4,4-三甲基戊基）二硫代次膦酸（也称为纯化的Cyanex 301，表示为HC301）萃取Nd（III）期间油包水（W / O）微乳液的形成。通过测量有机相中Nd（III），Na +和NO3-的浓度，红外光谱和动态光散射（DLS）的结果均表明，W / O微乳液可能以中和的配体与Nd的比例形成（III）在水相中的比例超过3：1。通过吸收光谱和扩展的X射线吸收精细结构（EXAFS）监测萃取的络合物中Nd（III）的配位环境，发现其随地层的变化而显着变化。 W / O微乳液的数量。当仅中和10％的HC301，不形成W / O微乳时，有机相中Nd（III）的内配位壳主要被HC301中的硫原子占据。随着HC301的进一步中和，Nd（III）附近的配位硫原子逐渐被水中的氧原子取代。这项工作为使用纯化的Cyanex 301作为萃取剂的萃取系统中的萃取机理提供了进一步的见解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号