摘要
研究了苯基硫脲（ＰＴＵ）─磷酸三丁酯（ＴＢＰ）─乙酸乙酯体系在ＨＣ１介质中对Ｒｈ（Ⅲ）的萃取行为，发现在〔ＨＣ１〕≥４ｍｏｌ／Ｌ的介质中，如先使ＰＴＵ（６ｍｏｌ／ＬＨＣ１溶液）与Ｒｈ（Ⅲ）在加热下反应，然后用ＴＢＰ─乙酸乙酯溶液萃取，则Ｒｈ（Ⅲ）可被定量萃至有机相中。用斜率法确定萃合物中的Ｒｈ：ＰＴＵ：ＴＢＰ＝１：２：１，通过紫外光谱和红外光谱研究，探讨萃取机理，提出萃合物的可能结构。
In≥4mol/L hydrochloric acid medium,Rh(Ⅲ) reacted with phenylthiourea(PTU──6mol/L HC1 solution)in the aqueous phase after heated for 80 min, a quantitative extraction of Rh(Ⅲ) was achieved with tributylphosphate(TBP)─ethy1 acetate solution.The best extraction conditions were determined.The formula of the extracted species(RhCl4·2PTU)-.H+.TBP was confirmed by the slope method、IR and UV spectra.The mechanism of the extraction and possible structure of the extracted species are discussed.
出处
《贵金属》
CAS
CSCD
北大核心
1996年第1期6-12,共7页
Precious Metals
基金
国家自然科学基金
