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双氧水络合萃取分离钨钼的前驱体料液的制备 关文娟,张贵清,高从堦,尚广浩 (中南大学 冶金科学与工程学院,稀有金属冶金与材料制备湖南省重点试验室,湖南 长沙,410083) 摘要:采用一种新方法制备双氧水络合萃取分离钨钼的前驱体料液.高钼钨酸铵溶液经双极膜电渗析(BMED)调酸后加入H2O2络合,得到前驱体料液;然后,用混合萃取剂三烷基氧膦(TRPO)和磷酸三丁酯(TBP)萃取分离钨钼.研究结果表明:在BMED过程中控制盐室溶液pH为3.20~3.50,运行210 min,其电流效率高于72%,直流电耗(以计)低于0.088 kW·h/mol;在络合过程中,W,Mo和H2O2利用率接近100%;在萃取过程中,W的单级萃取率最低为1.1%,Mo的单级萃取率最高为72.8%,分离系数βMo/W最高为84.4. 关键词:钨;钼;萃取分离;前驱体料液;BMED;H2O2 中图分类号......
that of MgH2-Nb2O5 by BM. The dehydriding reaction rate of MgH2-Nb2O5 (micro particle) BMed for 50 h is 4.76 times faster than that of the MgH2-Nb2O5 (micro particle) BMed for 0.25 h, while the dehydriding reaction rate of MgH2-Nb2O5 (nano particle) BMed for 50 h is only 1.18 times as that of the MgH2-Nb2O5 (nano particle) BMed for 0.25 h. The dehydriding reaction rate of the BMed MgH2-Nb2O5 (nano particle......
Hardness profile of FSWed AM50 Mg alloy 3.3 Relationship between microstructure and tensile properties The stress-strain curves of the BMed sample parallel to the WD and the weld sample perpendicular to the WD are demonstrated in Fig.4. Both the BMed and FSWed AM50 have remarkably elastic deformation, and their elastic deformation curves are consistent. The necking points for both the BMed and FSWed......