共查询到18条相似文献,搜索用时 109 毫秒
1.
2.
3.
4.
5.
报道了吐温80-(NH4)2SO4-水的固液萃取体系中Au(Ⅲ)溴络阴离子AuBr4-的萃取行为,H2SO4-NH4Br介质中,该体系可定量萃取Au(Ⅲ),而常见贱金属不被萃取,可用于从贱金属基体中分离金,对合成样及实际样品进行了萃取分离,并对机理进行了初步探讨。 相似文献
6.
新型萃取剂Cyanex272在液膜分离技术中的应用 总被引:1,自引:0,他引:1
介绍了新型磷类萃取剂Cyanex272在液膜分离、预浓缩和提取金属离子中的应用,并提出了有关该项研究的看法。 相似文献
7.
析相萃取(浮选)在贵金属分离富集中的应用 总被引:2,自引:1,他引:2
析相萃取(浮选)技术是近年来出现的一种新的分离富集方法。中介绍了该技术的基本原理及主要影响因素,并综述了该技术在贵金属分离富集中的研究与应用现状。 相似文献
8.
支撑液膜分离工艺是新近开发出的国为先进的技术,各分离科学工作者在这方面的研究十分活跃,本文就这项技术的基础原理,技术现状和在金属元素的富集和分离方面作了简要的综述。 相似文献
9.
介绍了液膜分离技术的最新研究成果和发展趋势,叙述了液膜分离技术进行稀土提取的本原理、应用实例;比较系统地评述了我国乳状液膜提取稀土的液膜配方、工艺条件、破乳和提取效率;对液膜法提取稀土的生产工艺,提出了建议。 相似文献
10.
吐温80-(NH4)2SO4-PAR体系液-固萃取分离测定钯 总被引:5,自引:2,他引:5
以水溶性螯合剂 PAR 为萃取剂,在高聚物吐温 80 水溶液中,选择(NH4)2SO4 作分相盐,用 EDTA-NaOH 溶液调节pH值,考察了Pd(Ⅱ)、Rh(Ⅲ)、Pt(Ⅳ)的液-固萃取行为,确定了吐温 80-(NH4)2SO4-PAR 体系中 Pd(Ⅱ) 与 Rh(Ⅲ)、Pt(Ⅳ) 的分离条件,同时建立了 Pd(Ⅱ) 的测定方法.Pd(Ⅱ)-PAR 配合物表观摩尔吸光系数为 4.23 ×104 L·mol-1·cm-1,钯量在 0~23.20 μg/10.00 ml 范围内符合比耳定律,检出限为 0.026 μg/10.00 ml.方法选择性好,易与钯共存的常见阴、阳离子不干扰测定;用拟定方法分离测定合成样和实际样,结果满意. 相似文献
11.
12.
13.
14.
串级萃取分离组分含量软测量及应用 总被引:2,自引:0,他引:2
应用萃取机理模型 -RBF神经网络技术对某公司NdPr/CeLa萃取分离生产过程进行仿真验证 ,结果表明所提出的在线估计方法实时性好、精度高 ,能较好地实现串级萃取分离过程组分含量的在线监测。 相似文献
15.
贵金属提取分离技术新进展 总被引:4,自引:0,他引:4
对近几年来贵金属提取分离技术的最新研究成果:无氨提取钯铂新工艺、分子识别技术在贵金属分离中的应用、萃取体系有机相和水相凝聚态结构的研究等作了归纳、分析。展望了开发应用新技术的前景,提出了今后的研究重点 相似文献
16.
The objective of this work was to determine if a vortex tube can be used as a gas separation device. A vortex tube is a simple mechanical device that has no moving parts. It separates a compressed inlet fluid into two streams, one hot and the other cold. There are a variety of theories to explain this separation. It has been hypothesized that a mixture of compressed gases flown into the vortex tube may separate into individual gas streams by virtue of differential centrifugal forces acting on them. During previous studies by others, conflicting results have been obtained using this hypothesis. Further study of the gas separation process in a vortex tube was carried out. An attempt has been made to separate methane and nitrogen gases using vortex tubes. This particular separation or the resulting enrichment of Methane concentration has applications in the mining industry. Methane is emitted in an underground coal mine. It leaks from the coal seams and is extremely hazardous for workers because of its high explosivity in air. A conventional but costly means of circumventing this problem is methane drainage before mining. Yet another effective method is to blow large amount of air through the mine to locally dilute methane concentration. The mixture of methane and air is directly passed into the atmosphere. There are advantages to separating methane from air at the ventilation exhaust of the mine. First, methane being a greenhouse gas has strict EPA emission standards, and second, methane can be directly used for generating power. In this experimental work, a laboratory size setup was used to investigate the feasibility of using a fixed geometry vortex tube for separating methane and nitrogen from a mixture. It was found that there was partial gas separation leading to a higher concentration of methane at one exit in comparison to the inlet and a lower concentration at the other exit. 相似文献
17.
开展了低浓度氢氟酸体系中MIBK萃取分离钽铌的研究,考察了萃取时间、萃取相比、氢氟酸浓度、钽铌浓度、钽与铌质量比对萃取分离过程的影响。结果表明,在始氢氟酸浓度0.5mol/L、钽铌总浓度60g/L、萃取相比(O/A)为5、钽与铌质量比2的条件下萃取5min可获得最佳的钽铌分离效果,钽铌分离系数高达50 000。 相似文献
18.