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) phosphoric acid (D2EHPA) for impurities elimination with 8 stages at organic-to-aqueous(O/A) volume ratio of 3?5, and 2- ethylhexyl phosphonic acid mono-2-ethylhexyl ester (known as PC88A or P507... mono-2-ethylhexyl ester (EHEHPA, commercially known as PC88A or P507), have been widely used for separation of Co from Ni[11]. Recently, the simultaneous extraction and separation of cobalt and nickel from......
(REEs). The extraction process of REEs with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester(P507) was investigated by membrane dispersion micro-extractors. Firstly, the extraction equilibrium... by 1 mol/L P507 at the out-let length of8 m. The extraction efficiencies are 0.978,0.983 and 0.991, respectively. Finally the stripping process was also studied with the micro-extractor. The stripping......
(REEs). The extraction process of REEs with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester(P507) was investigated by membrane dispersion micro-extractors. Firstly, the extraction equilibrium... by 1 mol/L P507 at the out-let length of8 m. The extraction efficiencies are 0.978,0.983 and 0.991, respectively. Finally the stripping process was also studied with the micro-extractor. The stripping......
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去,影响萃取剂的萃取性能.而在P507-N235盐酸萃取体系中,Fe3+在低酸度下可被P507萃取,在高酸度下形成Fe Cl-4配合物被N235萃取,萃取率达99%以上,且难被反萃下来.研究采用草酸和EDTA络合法除去有机相中的铁,结果表明:草酸络合法除铁率较低,较难用草酸络合法将有机相中的铁反萃下来;在温度25℃,反萃时间14 min,相比1∶1的条件下,用EDTA络合法除铁,铁的反萃率可达97.51%,经4次错流反萃后,可将有机相中铁的浓度降至0.002 g·L-1,达到深度除铁的目的.关键词:P507;N235;络合;除铁;草酸;EDTA;稀土;......
过浓缩后加入Na2CO3得到工业级的LiCO3,在镍钴锰富集物中加入氨水将锰和镍钴分离,最后使用P507分离镍和钴,在相比O/A=1,平衡pH=4.5,有机相组成为25%P507+75%溶剂油,经二级逆流萃取后钴的萃取率为99.3%.使用200g/L硫酸为反萃剂,相比为5时,钴的回收率达99.21%.反萃液使用草酸铵沉钴,萃余液中的镍采用氢氧化钠沉淀,整个工艺流程中钴的回收率为91.82%,镍的回收率为91.12%.关键词:废旧锂离子电池;亚硫酸钠;萃取;P507;草酸钴;......
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......
,Al and Fe.Against this background,the effect of emulsification caused by Si,Al and Fe on the La extraction with saponification P507(2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) in chloride......
P507/HZ818浸渍树脂在硫酸体系中选择性吸附铟(Ⅲ)的性能徐翠萍,刘军深,刘清清,陈晓亮鲁东大学化学与材料科学学院摘 要:以苯乙烯-二乙烯基苯大孔树脂(HZ818)为载体,2-乙基己基磷酸单(2-乙基己基)酯(P507)为萃取剂制备了P507/HZ818浸渍树脂,并用扫描电镜(SEM)和红外光谱(IR)对其进行了表征.研究了该浸渍树脂在硫酸体系中选择性吸附In(Ⅲ)的性能.静态吸附实验表明:在In,Ga二元体系中,P507/HZ818浸渍树脂能够较好地选择性吸附In,In/Ga分离系数在溶液pH=1.2时达到最大;在In,Ga,Zn,Fe,Cu多元混合体系中,浸渍树脂对In的选择性吸附在溶液pH=0.9时效果最好.动态吸附实验表明:控制In,Ga二元体系溶液pH=1.2,浸渍树脂柱对Ga(Ⅲ)没......
Kinetics of forward extraction of Ti(IV) from H2SO4 medium by P507 in kerosene using the single drop techniqueZHU Ping,HONG Dai,WU Jinhua,and QIAN Guangren College of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China摘 要:The kinetics of forward extraction of Ti(IV) from H2SO4 medium by P507 in kerosene has been investigated......
