The extraction and stripping of scandium from its sulfate solutions by isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester (PT-2, HL) diluted with n-hexane are reported. A high efficiency of separation betwee...The extraction and stripping of scandium from its sulfate solutions by isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester (PT-2, HL) diluted with n-hexane are reported. A high efficiency of separation between scandium, iron and lutetium can be achieved by controlling aqueous acidity. Different mechanisms of Sc3+ with PT-2 in various acid range have been proposed.At lower aqueous acidity, it is a cation exchange reaction, while at higher acidity. a solvation reaction was ascertained. Its IR and NMR spectra have been discussed. The effect of temperature on extraction of Sc3+ was observed and thermodynamic functions were calculated.展开更多
The optimum conditions for the extraction-chromatography by using 2-ethylhexyl-2-ethylhexyl- phosphonate resin to separate scandium(Ⅲ)from large amounts of other metal ions were reported.A me- thod for the separation...The optimum conditions for the extraction-chromatography by using 2-ethylhexyl-2-ethylhexyl- phosphonate resin to separate scandium(Ⅲ)from large amounts of other metal ions were reported.A me- thod for the separation and determination of microamount of scandium has been developed.This method gives higher accuracy and reproducibility than solvent extraction with PMBP,especially,for the samples containing high content of titanium.Many shortcomings of other methods ever reported can be overcome by the present method.展开更多
Separation of scandium and rare earths was investigated by using a new extraction chromatography which PSO was used as a stationary phase,while HCl-NH_4SCN solution as a mobile phase.The separation conditions were stu...Separation of scandium and rare earths was investigated by using a new extraction chromatography which PSO was used as a stationary phase,while HCl-NH_4SCN solution as a mobile phase.The separation conditions were studied.In this system, the separation factor(β_(Nd)^(Sc))can reach up to 1.3×10~4.The method can be applied to the purposes of separation,purification and analysis of microquantity of Sc in the mixed rare earth.展开更多
钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明...钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明:关于钪研究的外文文献数量明显多于中文文献,2010—2022年间对于钪的研究热度保持在较高水平,尤其在近五年,热度持续提升、发文量有所增加;“钪合金”“赤泥”等在关键词共现研究中出现的频次较高;钪的二次回收、萃取及钪合金发展等研究领域为主要的研究热点。本文研究了从原生矿石(稀土矿等)、工业废渣(赤泥等)及工业废液(盐酸废液等)等中回收钪的方法,并且重点关注了从钒钛磁铁矿尾矿与钛白废液中提钪的研究。“焙烧-浸出-萃取”是大部分提钪工艺会涉及到的过程,通过重选、磁选可以对原料进行预富集,离子交换法、沉淀法可提高钪产品纯度。未来可重点考虑从多种钪资源中协同回收钪的方法,进一步优化工艺流程,发展高效提钪技术。展开更多
文摘The extraction and stripping of scandium from its sulfate solutions by isopropyl phosphonic acid mono (1-hexyl-4-ethyl) octyl ester (PT-2, HL) diluted with n-hexane are reported. A high efficiency of separation between scandium, iron and lutetium can be achieved by controlling aqueous acidity. Different mechanisms of Sc3+ with PT-2 in various acid range have been proposed.At lower aqueous acidity, it is a cation exchange reaction, while at higher acidity. a solvation reaction was ascertained. Its IR and NMR spectra have been discussed. The effect of temperature on extraction of Sc3+ was observed and thermodynamic functions were calculated.
文摘The optimum conditions for the extraction-chromatography by using 2-ethylhexyl-2-ethylhexyl- phosphonate resin to separate scandium(Ⅲ)from large amounts of other metal ions were reported.A me- thod for the separation and determination of microamount of scandium has been developed.This method gives higher accuracy and reproducibility than solvent extraction with PMBP,especially,for the samples containing high content of titanium.Many shortcomings of other methods ever reported can be overcome by the present method.
基金the National Natural Science Foundation of China
文摘Separation of scandium and rare earths was investigated by using a new extraction chromatography which PSO was used as a stationary phase,while HCl-NH_4SCN solution as a mobile phase.The separation conditions were studied.In this system, the separation factor(β_(Nd)^(Sc))can reach up to 1.3×10~4.The method can be applied to the purposes of separation,purification and analysis of microquantity of Sc in the mixed rare earth.
文摘钪是一种稀散元素,在地壳中高度分散,现阶段对于钪产品的需求量较大,钪及其合金产品综合性能优越,被广泛应用于航空航天等行业。基于CiteSpace软件,结合文献计量法,对CNKI和Web of Science数据库中的论文进行了可视化分析。研究结果表明:关于钪研究的外文文献数量明显多于中文文献,2010—2022年间对于钪的研究热度保持在较高水平,尤其在近五年,热度持续提升、发文量有所增加;“钪合金”“赤泥”等在关键词共现研究中出现的频次较高;钪的二次回收、萃取及钪合金发展等研究领域为主要的研究热点。本文研究了从原生矿石(稀土矿等)、工业废渣(赤泥等)及工业废液(盐酸废液等)等中回收钪的方法,并且重点关注了从钒钛磁铁矿尾矿与钛白废液中提钪的研究。“焙烧-浸出-萃取”是大部分提钪工艺会涉及到的过程,通过重选、磁选可以对原料进行预富集,离子交换法、沉淀法可提高钪产品纯度。未来可重点考虑从多种钪资源中协同回收钪的方法,进一步优化工艺流程,发展高效提钪技术。
