摘要
研究在盐酸介质中石油亚砜Ⅱ(2)萃Pd(Ⅱ)的机理,并分析水相中影响(Ⅱ)萃取的主要因素及其原因,考察不同盐酸浓度下亚砜的萃合方式,盐酸浓度的萃钯(Ⅱ)实验曲线及其对贵金属萃取分离的意义,还测定了萃合物组成.
On the basis of the investigation of extraction experiments and extract spectra, the extraction mechanism of palladium (Ⅱ) with pctroleum sulfoxides Ⅱ(2) is drawn.
The concentration of hydrochloric acid influences the formation of extracts of Pd(Ⅱ) with pctroleum sulfoxides Ⅱ(2). In lower HCl concentration, Pd(Ⅱ) is mainly extracted as the coordination compounds which exist in the two forms of sulfur-metal and oxygen-metal coordination. And both the oxygen and sulfur of pctroleum sulfoxides Ⅱ (2) have appropriate coordination abilities owing to the effect of its cyclic configuration. The reason why the concentration of chlorion is the main factor and unfavourable for the coordination is discussed. In higher HCl concentration, the extraction of Pd(Ⅱ) proceeds according to the mechanism of acid association and depends on the concentration of hydrion primarily. The change of extraction mechanism can explain the dependence of extraction efficiancy of Pd(Ⅱ) on HCl concentration. The composition of extract of Pd(Ⅱ) with pctroleum salfoxidesⅡ (2) is determinded.
出处
《贵金属》
CAS
CSCD
北大核心
1989年第3期1-7,共7页
Precious Metals
基金
本课题得到中科院科学基金会资助
关键词
亚砜
萃取
钯
石油亚砜
Sulfoxide
Palladium
Extraction
Mechanism
