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with di-2-ethylhexyl phosphoric acid(D2EHPA),D2EHPA-tributyl- phosophate(TBP)synergistic extracting system,and 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester(HEHEHP)was made at pH= 2.0.It is demonstrated that the extraction efficiency with D2EHPA is improved after being saponified by sodium hydroxide,and D2EHPA-TBP synergistic extracting,as well as HEHEHP,has a superior selectivity to Zn(Ⅱ)over Cd......
reaction of gold (III), palladium (II) or platinum (IV) is exothermic when dtmso is used as an extracting reagent. The coordination number was studied by the slope method. The results indicate that, in high acidity, the dtmso coordination number for extracting gold (III) or palladium (II) is 3, and that for platinum (IV) is 2. UV and FT-IR spectra were used to analyze the structure of the complex......
="ChDivSummary">P507 solvent extraction is the main method to separate and purify the rare earth products.The emulsification may be caused by the impurities in process of extracting rare earths...,while aluminum concentration of feed was higher.Pointing to this problem,the structural change of saponification P507 extracting aluminum and lanthanum was investigated by infrared spectroscopy......
g/cm3,两相的密度相差不大,为了实现快速分相,可采用离心萃取设备. 表5 N1923循环萃取实验结果 Table 5 Circulating operation of extracting tungsten by N1923 表6 白钨矿浸出液中钨的萃取效果 Table 6 Extraction efficiency of tungsten... Zhao,LI Xue-wei,QU Jun,ZHANG Qi-wu. Mechanochemically extracting tungsten through caustic processing of scheelite by controlling calcium dissolution[J]. International Journal of Refractory Metals......
extracting parameters were determined by orthogonal experiments as follows: pH value of solvent at first extraction is 5.5-6.0, that at the second extraction is 7-8; microwave power is 700 W; mass ratio of Fructus Forsythiae to water is 1?12; irradiation time is 10 min, and extracting times is two. Under these optimal conditions, the yield of lignans reaches 0.364%. Compared with the conventional......
process for extracting indium from indium-zinc concentrates was proposed. The process can directly extract indium from removed copper solution by D2EHPA, and cancel the stage of removing iron... the neutral leached residues with high concentrated acid at high temperature, reduction ferric and removing copper, and extracting indium, were investigated. The results show that total recovery......
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火焰原子吸收法测定岩石样品中微量银方法的改进苏丹1,云作敏1(1.吉林省长春市吉林有色金属地质勘查局测试中心)摘 要:采用王水分解样品,以10%的王水代替20%HCl浸取样品并作为测定介质,火焰原子吸收法测定岩石样品中的微量银,测定范围为0.3~500g/t.该方法简单,快速,成本低,测定结果准确.关键词:火焰原子吸收法; 岩石; 银......