作　　者： ; ;

机构地区： 淮南师范学院化学生物系

出　　处： 《稀有金属》 2006年第5期715-718,共4页

摘　　要： 研究了磷酸三丁酯(TBP)存在下十六烷基三甲基溴化铵(CTMAB)萃取Pd(Ⅱ)的性能。具体研究了CTMAB浓度、TBP浓度、相比、酸度、时间等对Pd(Ⅱ)萃取性能的影响。水相中钯的浓度为1.000 g.L-1,CTMAB浓度为0.2 mol.L-1时,Pd(Ⅱ)的萃取率达到92.7%。测定Pd(Ⅱ)的饱和容量大于5 g.L-1。确定了CTMAB萃取钯的反应方程式为:PdCl42-+RNBr→[PdCl4.RN]-+Br-。研究了CTMAB与TBP对Pd(Ⅱ)协同萃取的性能,CTMAB,TBP的浓度分别为0.16,0.04 mol.L-1(二者的总浓度为0.2 mol.L-1)时,协萃效应达到最大,协萃系数为3.086。氨水能有效地反萃Pd(Ⅱ)。载钯有机相中钯浓度为0.96 g.L-1,氨水的浓度为1 mol.L-1时,钯的反萃率达到97.6%。 Performances of extracting palladium （ Ⅱ ） were studied with CTMAB and TBP. The studies include the effects of CTMAB concentration, TBP concentration and phase ratio, acidity of aquatic phase, time on the tion rate of （Ⅱ） and extraction of palladium （ Ⅱ ）. The extracpalladium（ Ⅱ ） is 92.7% when palladium concentration in aqueous phase is 1. 000 g. L^-1 CTMAB concentration in oil phase is 0.2 mol.L^-1. Saturated capacity of determined and its value exceeds palladium （ Ⅱ was 5 g. L^- 1. Equation of CTMAB extracting palladium（ Ⅱ ） was determined, which was PdCl4^2- ＋ RNBr → [ PdCk4. RN ] ^- ＋ Br^-. Synergic extracting performances were studied also with CTMAB-TBP. CTMAB concentration and TBP concentration are 0.16 and 0.04 mol.L^-1 respectively （total concentration of CTMAB and TBP is 0.2 mol.L^-1）, synergic extracting effect is the highest, synergic coefficient is 3.086. Palladium （Ⅱ） can be stripped efficiently with aqueous ammonia, and the striping performance of palladium in oil phase which its concentration is 0.96 g. L^-1 is 97.6% by aqueous ammonia with concentration of 1.0 mol. L^-1.

关 键 词： 萃取 钯

领　　域： [理学] [理学] [冶金工程]