摘要
本文研究了伯胺N_(1923)与中性磷试剂(TBP,DBBP)的正庚烷溶液,从盐酸介质中对Cd(II)的协同萃取。用斜率法、等摩尔系列法确定协萃配合物的组成为(RN-H_3Cl)_2·CdCl_2·B,求得协萃反应的平衡常数分别为lgK_(12)(TBP)=2.13,lgK_(12)(DBBP)=2.37;有机相协萃配合物的生成常数分别为lgβ_(12)(TBP)=1.22,lgβ_(12)(DBBP)=1.41,计算了协萃反应的热力学函数,并对协萃配合物的IR,NMR谱进行了研究。
The synergistic extraction of Cd (Ⅱ) with primary amine N--1923and neutral organophosphorus reagents (TBP, DBBP, B) from hydrochloric acidhas been investigated at μ=0.5, t=25℃. The compositions of the synergisticextraction complexes and the mechanism of the synergistic extraction have beendatermined by the methods of slope and constant mole. The synergistic extractioncomplexes with composition (RNH_3C1)_2. CdCl_2.B have been demonstrated. Thesynergistic extraction reactions and additional reaction of Cd (Ⅱ) have beenproposed as follows:CdCl_2+2RNH_3Cl_(o)+B_(o)?(RNH_3Cl)_2. CdCl_2.B_(o)(RNH_3Cl)_3. CdCl_2_(o)+B_(o)?(RNH_3Cl)_2.CdCl_2.B_(o)+RNH_3Cl_(o)In addition, the equilibrium constants and the thermodynamic functions of the syn-ergistic extraction reactions have been calculated. The IR and NMR spectra of thesynergistic extraction complexes of cadmium (Ⅱ) have been studied as well.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第1期B24-B30,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
伯胺N1923
CD(II)
中性磷萃取剂
primary amine
neutral organophosphorus reagent
synergistic extraction
cadmium
