在硫酸盐介质中采用双官能团离子液体从母材中提取和分离铜（英文）

研究了一种在煤油中采用双官能团[A336/Cy272]离子液体(IL),从其他母材离子溶剂萃取与分离铜的新工艺。采用这种双官能团IL比单独采用Aliquat 336或Cyanex 272萃取剂能更有效地萃取铜。采用紫外-可见光谱表征八面体铜-IL复合物的形成,同时采用FTIR光谱验证金属配体的相互作用。0.1 mol/L[A336/Cy272]的负载容量为1.71 g/L。剥离研究表明,采用0.1 mol/L硫酸从0.05 mol/L IL中有效剥离0.298 g/L铜离子。在煤油中采用0.05 mol/L[A336/Cy272]等摩尔二元混合物研究铜对镍、镉、铁的选择性。在pH 3.56时得到最高分离因子8.41。在pH研究范围内铜能有效地从镍中分离,铁比铜优先被IL萃取,在p H 2.4时,得到最高分离因子3246。含有其他金属杂质的铜合成溶液中金属离子萃取率顺序为Fe>Zn>Cu>Cd>Co>Ni。

利用Cyphos IL101从废液晶显示器中回收铟的湿法冶金工艺的开发

本研究的主要目的是从废液晶显示面板中回收铟。为此,研究一种离子液体Cyphos IL101。首先,考察平衡时间、酸浓度、氯离子浓度、氢离子浓度等萃取参数对Cyphos IL 101萃取In(III)萃取效率的影响。用0.005 mol/L Cyphos IL 101在2.0 mol/L HCl中定量萃取铟,并用1.0 mol/L H2SO4定量反萃。用Job法确定萃合物组成,为R3R'PInCl4(R=C6H13;R′=C14H29)。基于多金属(萃取)研究的结果,Cyphos IL 101进一步用于从废液晶显示器浸出液中去除铟、锡和铜。获得从废液晶显示器中回收铟的优化条件。为了分离金属离子铟、锡和铜,根据McCabe−Thiele分析,进行逆流萃取和选择性反萃。为了从进料中完全除去锡,在O/A比为1:3的条件下进行两段萃取,并用0.1 mol/L H2SO4进行铟和锡的选择性反萃。提出从废液晶显示器中分离铟的工艺流程。

Separation of copper and iron from chloride media using Cyanex 921 in kerosene

The extraction and separation of Cu(Ⅱ)and Fe(Ⅲ)from HCl media using Cyanex 921 in kerosene were investigated.The effect of shaking time,aqueous phase acid concentration,Fe(Ⅲ)/Cu(Ⅱ)concentration,Cyanex 921 concentration,temperature and aqueous to organic phase ratio on the separation of Cu(Ⅱ)and Fe(Ⅲ)was studied using 0.1 mol/L Cyanex 921 in kerosene.Maximum separation was achieved from 2 mol/L HCl containing 0.001 mol/L Cu(Ⅱ)and 0.005 mol/L Fe(Ⅲ)with 0.1 mol/L Cyanex 921 in kerosene.Feasible separation of copper and iron was also possible from 5 mol/L HCl using 0.02 mol/L Cyanex 921.

双功能离子液体在氯化物介质中萃取分离Eu^(3+)的应用

研究使用双功能离子液体萃取剂(Bif-ILEs)三辛基甲基氯化铵二(2-乙基己基)磷酸酯([A336][D2EHP])和十四烷基三己基氯化膦二(2-乙基己基)磷酸酯([P_(66614)][D2EHP])、以煤油作稀释剂从氯化物介质中萃取Eu^(3+)的过程,以开发环境友好的铕萃取工艺。通过改变关键工艺参数,研究Eu^(3+)的萃取行为。萃取研究表明,铵基离子液体[A336][D2EHP]对Eu^(3+)的萃取效率优于膦基离子液体[P_(66614)][D2EHP]。例如,使用0.05 mol/L[A336][D2EHP]可以定量萃取Eu^(3+),而需要0.1 mol/L的[P_(66614)][D2EHP]才能达到相同的Eu^(3+)萃取率。对于[A336][D2EHP],铕的萃取为吸热过程。反萃实验表明,使用20%HNO_(3)(体积分数)可以将100%的Eu^(3+)从两种负载的离子液体中反萃下来。在pH值3.2时,分离因子(bY/Eu)最高,达到653.59;在相同pH值下,Eu^(3+)对La^(3+)的分离因子为30.6。采用0.2 mol/L[A336][D2EHP]、相比O/A=1:1和1:2的两级错流萃取,可从废灯管荧光粉浸出液中回收99.98%的Eu和99.99%的Y。

Solvent extraction of neodymium(Ⅲ) from acidic nitrate medium using Cyanex 921 in kerosene

The extraction of neodymium（III） from acidic nitrate medium was investigated using Cyanex 921 as extractant in kerosene. The metal concentration in the aqueous phase before and after extraction was determined spectrophotometrically by Arsenazo III method. The complete equilibration was achieved in 15 rain. The effects of shaking time, nitric acid concentration, nitrate concentration, extractant concen- tration, and temperature on the extraction were studied. The extraction of Nd（III） was found to increase very slowly with increase in concen- tration of HNO3 in the range of 0.001-3.008 mol/L and then decreased when 0.01 mol/L HNO3 was used. The percentage of extraction was increased with increase in nitrate concentration from 0.01M）.45 mol/L and then decreased when nitrate concentration increased to 0.5 mol/L. Quantitative extraction of Nd（III） （98%） was obtained from the aqueous phase containing 0.001 mol/L HNO3 and 0.1 mol/L KNO3 using 0.5 mol/L Cyanex 921. On the basis of slope analysis, the extracted complex in the organic phase was proposed to be Nd（NO3）3.2Cyanex 921. The extraction of Nd（III） was found to increase with increase in concentration of metal ion in the range of 0.0014）.05 mol/L from 0.001 mol/L HNO3 and 0.1 mol/L KNO3 with 0.1 mol/L Cyanex 921. The percentage of extraction of neodymium was found to decrease with in- crease in temperature. From temperature variation studies, the negative value of AH indicated the extraction reaction to be exothermic and the negative value of AS indicated the formation of a stable complex, Almost 100% Nd（III） was recovered from the fully loaded organic phase using 0.002 mol/L H2SO4 and 0.01 mol/L HCl.