The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BA...The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BAMBP）. Rb＋ and Cs＋ were enriched and separated effectively by precipitating Mg2＋ before extraction and by scrubbing out K＋ and Na＋ repeatedly before stripping. The effects of the volume ratio of organic phase to aqueous extraction phase（O/A）, alkalinity of aqueous phase（c（OH）-）, interference from K＋ and Mg2＋, and ratio the volume of organic phase to aqueous scrubbing phase（O/A′） were investigated. The experimental brine was extracted optimally by 5-stage extraction with 1.0 mol/L t-BAMBP in SK, c（OH-）=1 mol/L, and O/A=1：1. The scrubbing yield of rubidium was only about 10.5% when the extraction solvent was washed 3 times with 1×10-4 mol/L Na OH at O/A′=1：0.5. After 5-stage countercurrent extraction, the final extraction yields of Rb＋ and Cs＋ reached 95.04% and 99.80%, respectively.展开更多
SY509-3-01 [篇名] Characterization of salt particle-induced corrosion processes by synchrotron-generated X-ray fluorescence and complementary surface analysis tools；SY509-3-09 [篇名] Chemical and Electrical Techniqu...SY509-3-01 [篇名] Characterization of salt particle-induced corrosion processes by synchrotron-generated X-ray fluorescence and complementary surface analysis tools；SY509-3-09 [篇名] Chemical and Electrical Techniques for Condition Assessment of Composite Insulators；……展开更多
采用溶剂热法合成了Na Bi F4:Yb^3+/Er^3+上转换发光纳米材料,讨论了在溶剂热阶段反应温度、反应时间对Na Bi F4:Yb^3+/Er^3+物相组成、形貌及发光性能的影响。结果表明:在反应阶段,适当增加反应温度、延长反应时间,可以增强Na Bi F4:Yb...采用溶剂热法合成了Na Bi F4:Yb^3+/Er^3+上转换发光纳米材料,讨论了在溶剂热阶段反应温度、反应时间对Na Bi F4:Yb^3+/Er^3+物相组成、形貌及发光性能的影响。结果表明:在反应阶段,适当增加反应温度、延长反应时间,可以增强Na Bi F4:Yb^3+/Er^3+的结晶度,进而提高上转换发光效率,但溶剂热阶段反应温度高于220℃时,容易生成金属铋。此外,通过Rb^+离子掺杂可进一步增强Na Bi F4:Yb^3+/Er^3+的上转换发光强度。Rb^+掺杂量为5%(摩尔分数)时,绿光和红光分别增加至原来的1.73和1.5倍。最后基于荧光强度比(IFIR)技术,研究了样品在300~500 K温度范围的IFIR变化曲线,结果表明:Na Bi F4:Yb^3+/Er^3+样品在温度传感领域有潜在应用价值。展开更多
基金Project(20606008)supported by the National Natural Science Foundation of ChinaProject(11070210)supported by the Fundamental Research Funds for the Central Universities of China
文摘The residues of salt lake brine from which potassium had been removed were used to extract Rb＋ and Cs＋ together with a sulphonated kerosene（SK） solution of 1.0 mol/L 4-tert-butyl-2-（α-methylbenzyl） phenol（t-BAMBP）. Rb＋ and Cs＋ were enriched and separated effectively by precipitating Mg2＋ before extraction and by scrubbing out K＋ and Na＋ repeatedly before stripping. The effects of the volume ratio of organic phase to aqueous extraction phase（O/A）, alkalinity of aqueous phase（c（OH）-）, interference from K＋ and Mg2＋, and ratio the volume of organic phase to aqueous scrubbing phase（O/A′） were investigated. The experimental brine was extracted optimally by 5-stage extraction with 1.0 mol/L t-BAMBP in SK, c（OH-）=1 mol/L, and O/A=1：1. The scrubbing yield of rubidium was only about 10.5% when the extraction solvent was washed 3 times with 1×10-4 mol/L Na OH at O/A′=1：0.5. After 5-stage countercurrent extraction, the final extraction yields of Rb＋ and Cs＋ reached 95.04% and 99.80%, respectively.
文摘SY509-3-01 [篇名] Characterization of salt particle-induced corrosion processes by synchrotron-generated X-ray fluorescence and complementary surface analysis tools；SY509-3-09 [篇名] Chemical and Electrical Techniques for Condition Assessment of Composite Insulators；……
文摘采用溶剂热法合成了Na Bi F4:Yb^3+/Er^3+上转换发光纳米材料,讨论了在溶剂热阶段反应温度、反应时间对Na Bi F4:Yb^3+/Er^3+物相组成、形貌及发光性能的影响。结果表明:在反应阶段,适当增加反应温度、延长反应时间,可以增强Na Bi F4:Yb^3+/Er^3+的结晶度,进而提高上转换发光效率,但溶剂热阶段反应温度高于220℃时,容易生成金属铋。此外,通过Rb^+离子掺杂可进一步增强Na Bi F4:Yb^3+/Er^3+的上转换发光强度。Rb^+掺杂量为5%(摩尔分数)时,绿光和红光分别增加至原来的1.73和1.5倍。最后基于荧光强度比(IFIR)技术,研究了样品在300~500 K温度范围的IFIR变化曲线,结果表明:Na Bi F4:Yb^3+/Er^3+样品在温度传感领域有潜在应用价值。
