热分解法从钨钼过氧酸溶液中分离钨和钼

中国有色金属学报(英文版), 2016, 26(10): 2731-2737. doi: 10.1016/S1003-6326(16)64402-3

热分解法从钨钼过氧酸溶液中分离钨和钼

1.中南大学冶金与环境学院,长沙,410083

2.稀有金属冶金与材料制备湖南省重点实验室,长沙,410083

3.中南大学冶金与环境学院，长沙 410083; 稀有金属冶金与材料制备湖南省重点实验室，长沙 410083

4.中南大学冶金与环境学院,长沙,410083

基金项目: Project (51334008) supported by the National Natural Science Foundation of China Project (2010FJ1011) supported by the Key Program of Science and Technology of Hunan Province, China

关键词： W , Mo , 分离 , 热分解 , 过氧钨酸 , 过氧钼酸

Separation of W and Mo from their peroxoacids solutions bythermal decomposition

Keywords： W , Mo , separation , thermal decomposition , peroxotungstic acid , peroxomolybdic acid

研究了一种从含钨钼过氧酸溶液中分离钨和钼的方法。对过氧钨酸和过氧钼酸的热分解过程分别进行研究，证实了过氧钼酸比过氧钨酸具有更高的稳定性，并利用这一差异来分离钨和钼。研究反应温度、搅拌速度、游离酸浓度和溶液钼浓度对钨、钼分离效果的影响。结果表明：在钨、钼过氧酸溶液的热分解过程中，过氧钨酸分解为钨酸沉淀，而钼仍存在于溶液中，从而实现钨和钼的分离。在所研究的实验条件下，钨和钼的分离系数可达到112，该结果表明热分解法在钨、钼分离过程中具有良好的应用前景。

A separation method for W and Mo from peroxoacids solution by thermal decomposition wasstudied. Thermal decomposition of peroxotungstic acid and peroxomolybdic acid was investigated respectively. The results confirmed that peroxomolybdic acid showed a preferable stability compared with peroxotungstic acid. This thermal stability difference was the basic principle of theseparationof W and Mo. Experiments were performed to study the effects of temperature, stirring speed, free acid concentration and Mo concentration on the separation efficiency. The results indicated that peroxotungstic acid decomposed into tungstic acid(H2WO4) and precipitated selectively,while Mo was rejected in aqueous solution,realizing good separation of W and Mo. The separation factorof W and Moreached 112 under the studied conditions, which indicated that this method has potential for use in separating W and Mo.

参考文献

[1]	吕莹;李洪桂.合理利用我国高钼钨精矿[J].中国钨业,2005(5):15-16,21.
[2]	赵中伟;曹才放;陈星宇.铁盐沉淀法分离宏量钨钼[J].中国有色金属学报（英文版）,2011(12):2758-2763.
[3]	Zhongwei Zhao;Jialiang Zhang;Xingyu Chen.Separation of tungsten and molybdenum using macroporous resin: Equilibrium adsorption for single and binary systems[J].Hydrometallurgy,2013:120-127.
[4]	卢晓颖;霍广生;廖春华.利用D309树脂离子交换分离宏量钨和钼[J].中国有色金属学报（英文版）,2014(9):3008-3013.
[5]	李洪桂;赵中伟;霍广生.相似元素的深度分离[J].中国有色金属学报,2003(1):234-240.
[6]	刘旭恒;孙放;赵中伟.钨钼分离的研究进展[J].稀有金属与硬质合金,2007(4):42-45.
[7]	关文娟;张贵清;高从增.蒸发脱氨络合法制备的双氧水络合萃取分离钨钼前驱体料液[J].中国有色金属学报（英文版）,2013(4):1139-1146.
[8]	袁斌;邓舜勤.用离子交换法从钨溶液中分离钼[J].湿法冶金,2003(2):69-78.
[9]	L.Pettersson;F.Taube;I.Andersson;I.Toth;M.Hashimoto;O.W.Howarth.~(17)O NMR study of aqueous peroxoisopolymolybdate equilibria at lower peroxide/Mo ratios[J].Dalton transactions: An international journal of inorganic chemistry,20031(1):146-152.
[10]	Oliver W. Howarth.Oxygen-17 NMR study of aqueous peroxotungstates[J].Dalton transactions: An international journal of inorganic chemistry,20043(3):476-481.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网