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by scanning electron microscopy (SEM). Optimum process parameters, namely, temperature of 25 ℃, current density of 400 A/m2, distance between anode and cathode of 50 mm, oxalic acid dosage of 10 g/L... of oxalic acid to electrolyte has no remarkable change in it if the dosage is appropriate. Key words: antimony; electro refining; bismuth; oxalic acid ......
High-efficiency simultaneous extraction of rare earth elements and iron from NdFeB waste by oxalic acid leachingQingsheng Liu1,Tao Tu1,2,Hao Guo3,Huajin Cheng1,Xuezhong Wang11. Faculty of Materials... leaching process.In this study,a new method for leaching NdFeB waste with oxalic acid was developed.The high-efficiency,simultaneous and high-value recovery of rare earth elements and iron......
Oxalic Acid Promoted Hydrolysis of Sodium Borohydride for Transition Metal Free Hydrogen Generation彭元亭1,ZENG Hui1,SHI Yu2,XU Jinrong3,谢镭2,陈均4,ZHENG Jie3,LI Xingguo31. Wuhan Institute of Marine...-efficiency hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the solid mixture.H2C2O4......
Oxalic Acid Promoted Hydrolysis of Sodium Borohydride for Transition Metal Free Hydrogen Generation彭元亭1,ZENG Hui1,SHI Yu2,XU Jinrong3,谢镭2,陈均4,ZHENG Jie3,LI Xingguo31. Wuhan Institute of Marine... hydrogen generation method from NaBH4 hydrolysis promoted by oxalic acid.NaBH4 and H2C2O4 were premixed and hydrogen generation was initiated by adding water into the solid mixture.H2C2O4 was selected......
Preparation of large particle rare earth oxides by precipitation with oxalic acid柳召刚,李梅,胡艳宏,王觅堂,史振学摘 要:The large particle CeO2 and Y2O3 were prepared using oxalic acid as precipitator. The effects of operational parameters such as stirring velocity, precipitation temperature, feeding speed, aging time, precipitation method, and calcination temperature......
Preparation and morphology of nano-size ceria by a stripping precipitation using oxalic acid as a precipitating agent梅燕,王为,孙何,聂祚仁College of Materials Science and Engineering,Beijing University of Technology摘 要:The precursors organic cerium deposits were obtained by a stripping precipitation method from cerium-loaded P507 organic phase using oxalic acid......
Preparation and morphology of nano-size ceria by a stripping precipitation using oxalic acid as a precipitating agent梅燕,王为,孙何,聂祚仁College of Materials Science and Engineering,Beijing University of Technology摘 要:The precursors organic cerium deposits were obtained by a stripping precipitation method from cerium-loaded P507 organic phase using oxalic acid......
; 文献标志码:A 文章编号:1672-7207(2011)09-2558-05 Oxidation of oxalic acid by chlorine in mother-liquor originated from precipitation of cobalt... of Metallurgical Engineering, Central South University, Changsha 410083, China) Abstract: In order to remove the oxalic acid left in the mother-liquor originated from the precipitation of cobalt by oxalic acid......
; 文章编号:1672-7207(2009)04-0884-07 Selective extraction of oxalic acid from cobalt mother-liquor with complexing agent P350 TIAN Qing-hua, LI Zhi-hai, GUO Xue-yi (School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China) Abstract: The solvent of P350 was applied to extract and separate the oxalic acid from the mother-liquor......
,硅浸出率的影响,结果如图7所示. 图5 草酸浓度对镓,锗,铁,锌,铜,硅浸出率的影响 Fig. 5 Effect of oxalic acid concentration on leaching rates of Ga, Ge, Fe, Zn, Cu and Si 图6 草酸浸出渣的XRD谱 Fig. 6 XRD pattern of leaching residue after oxalic acid leaching 图7 浸出时间对镓,锗,铁,锌,铜,硅浸出率的影响 Fig. 7 Effect of leaching time on leaching rates of Ga, Ge, Fe, Zn, Cu and Si 从图7可知,在草酸浸出体系下,镓,锗在较短的浸出时间内即可达到较高的浸出率.在时间为......
