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extractive reagent was Lix 984N (Germany Henkel Corporation) with kerosene as the diluent reagent. The stripping reagent was 180 g/L H2SO4 solution. 2.2 Analytical method The concentration... solution is high-efficient stripping reagent. The optimal condition of stripping of copper is O/A=1?2 with 1.5 mol/L H2SO4 for 2 min. References [1] WU Wen-jian, JIANG Han-ying, YANG Song-qing......
sulfuric acid medium using Cyanex 923 in heptane solution was investigated. The effects of extractant concentration, pH and sulfate ion as well as stripping agents, acidity and temperature...Extraction and Stripping of Ytterbium (Ⅲ) from H2SO4 Medium by Cyanex 923 Li Hongfei1,Meng Shulan1,Li Deqian1,Wang Weiwei1,Wang Xianglan1 (1.Key Laboratory of Rare Earth Chemistry and Physics......
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stripping method of titanium alloy oxide films was studied. An environment friendly solution hydrogen peroxide and sodium hydroxide without hydrofluoric acid or fluoride were used to strip the oxide films... of the oxide film was in the range of 5-6 μm. The oxide films were stripped for 2 to 8 min in the solution. Moreover, the effect of the stripping time on the efficiency of the film stripping......
stripped using 200 g/L H2SO4 solution and the stripping rate reaches 99.18% in five-stage counter current stripping with O/A ratio of 4:1 at 25 ℃ for 8 min. After gallium stripping,the iron in loaded organic phase can be stripped using 7 mol/L HCl solution and the stripping rate of iron reaches 99.23% in three-stage counter current stripping with O/A ratio of 1.5:1 at 25 ℃ for 2 min. The extractant......
solution under the optimum condition. Moreover, oxalate was explored as a precipitation stripping agent for BiCl3·xTBP (x=2 or 3) complexes, by which Bi(III) was stripped in the form of Bi2(C2O4)3... to 99.2% of Bi(III) in the organic solution could be easily stripped by precipitation stripping in one stage under the condition of 20% oxalic acid with a phase ratio of 1 in the form of Bi2(C2O4)3·7H2O......
for reducing Fe3+ to Fe2+ in P204 stripped by a dilution H2SO4 solution in the case of mechanical stirring and having strong protective atmosphere. The effects of reductive stripping time, Fe3+ content in P204... the concentration of Fe2+ in the striping solution and the factors was also examined. The results show that under the optimum conditions, the reducer index of iron powders is 1.087, the stripping rate of Fe3+ can......
铝合金在3.5%NaCl溶液中的极化曲线 Fig.2 Polarization curves of 7A04 aluminum alloy in 3.5% NaCl solution 表1 7A04铝合金在3.5%NaCl(质量分数)溶液中的极化曲线参数 Table 1 Parameters of polarization curves of 7A04 aluminum alloys in 3.5% NaCl (mass fraction) solution 图3所示为经过极化曲线测试后铸态与半固态试样表面的显微形貌.由图3可看出,铸态试样表面出现严重鼓泡和剥蚀(见图3(a))；试样表面堆积较多灰白色腐蚀产物,晶界模糊(见图3(b))；而半固态试样表面则以点蚀为主,表面基本平整(见图3(c)),未出现剥蚀,晶界清晰可见.图3(d)中白色区域为半固态初生......
was cooled in cold water after dumping. The metallographic specimens were cut from the centre of the quenched slurries and then roughly ground, finely ground, polished and etched with 0.5% HF aqueous solution......
. Then the slurry was quenched in cold water rapidly. The microstructures of samples polished and etched in Keller’s reagent (the solution of 1% HF, 1.5% HCL, 2.5% HNO3 and 95% distilled water) for 25 s, were......
