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水-正丙醇-硫酸铵体系析相萃取分离钯的研究沈久明1,司学芝1,李想1,马万山1(1.河南省信阳市信阳师范学院化学化工学院)摘 要:研究了水-正丙醇析相萃取Pd(Ⅱ)的行为及Pd(Ⅱ)与一些金属离子分离的条件.结果表明,硫酸铵能使正丙醇的水溶液分成两相,在分相过程中,Pd(Ⅱ)与溴化钾生成的PdBr42-与质子化正丙醇(C3H7OH2+)形成缔合物[PdBr42-][C3H7OH2+]2能被正丙醇相完全萃取.当溶液中正丙醇的体积分数,溴化钾浓度和硫酸铵的质量浓度分别为30%,7.0×10-3 mol/L,0.2 ......
efficiency of reactants as discussed previously. And similar to those in the NaOH-NaNO3 binary molten salt medium, the extraction rates of vanadium and chromium become independent of temperature and alkali...Trans. Nonferrous Met. Soc. China 24(2014) 1273-1288 Research and prospect on extraction of vanadium from vanadium slag by liquid oxidation technologies Zhong-hang WANG1,2, Shi-li ZHENG1, Shao-na......
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J. Cent. South Univ. (2018) 25: 241-250 DOI: https://doi.org/10.1007/s11771-018-3733-8 Theoretical analysis of adaptive harmonic window and its application in frequency extraction of vibration... characteristics of window width changing and analytical center moving of the adaptive harmonic window are presented. Finally, the proposed adaptive harmonic window is applied to weak signal extraction......
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;Effect of hydrochloric acid concentration on leaching efficiency of bismuth and iron 2.2 [Cl-]对Bi,Fe浸出率的影响 量取2 mol/L的HCl溶液300 mL于500 mL烧杯,加入不同质量的CaCl2以调节[Cl-],倒入10.00 g铂钯精矿80 ℃恒温搅拌反应2 h,考察[Cl-]对Bi,Fe...0.66%,但当[Cl-]=5 mol/L时,Ag的浸出率上升至82.92%,因此综合考虑不额外添加Cl-. 图6 Cl-浓度对Bi,Fe浸出率的影响 Fig. 6 Effect of chloride ion concentration on leaching efficiency of bismuth and iron 2.3 浸出温度对Bi,Fe浸出率的影......
Oxygen Evolution Efficiency and Chlorine Evolution Efficiency for Electrocatalytic Properties of MnO2-based Electrodes in Seawater闫镇威1,SONG Lijun2,TANG Mingqi3,FENG Zaiqiang31. School of Mechanical... and Engineering, North China University of Water Resources and Electric Power摘 要:To improve both oxygen evolution efficiency and stability at high temperatures, Mn......
Synergistic extraction of rare earths by mixture of HDEHP and HEH/EHP in sulfuric acid medium HUANG Xiaowei1,ZHU Zhaowu1,ZHANG Yongqi1,WANG Chunmei1,ZHANG Guocheng1,LI Jianning1 (1.National Engineering Research Center for Rare Earth Materials,General Research Institute for Nonferrous Metals,and Grirem Advanced Materials Co.,Ltd.,Beijing 100088,China) Abstract:The extraction of RE(Ⅲ) (RE=La, Nd......
Na2O/(Al2O3+Fe2O3) of 1 and lime ratio CaO/SiO2 of 1.5. The increase of n(CaO)/n(SiO2) decreases the extraction of alumina and silica. The prolongation of sintering time and the increase of sintering temperature benefit the alumina extraction but reduce the silica extraction. The increase of the ratio of iron to alumina decreases the sintering temperature and narrows the sintering temperature range......
J. Cent. South Univ. (2012) 19: 1921-1926 DOI: 10.1007/s11771-012-1226-8 Relevance-based content extraction of HTML documents WU Qi(吴麒), CHEN Xing-shu(陈兴蜀), ZHU Kai(朱锴), WANG Chun-hui(王春晖...: Content extraction of HTML pages is the basis of the web page clustering and information retrieval, so it is necessary to eliminate cluttered information and very important to extract content of pages......