摘要
The extraction of zinc by di-(2-ethylhexyl)-dithiophosphoric acid(D2EHDTPA)-trioctylamine(TOA) was investigated.Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed they reacted and formed an electrolyte of ionic pairs.The extraction of zinc by the electrolyte was of antisynergistic nature,and the reaction was Zn2＋＋ 2BHA(O)→ Zn-(O)＋ 2B(O)＋ 2H＋ (subscript (o) stand for“ oil phase” ).The zinc extraction was an endothermic reaction ,the heat of reaction was 130.1 kJ· mol－ 1.Some phenomena of interface concerned were also discussed.
The extraction of zinc by di-(2-ethylhexyl) -dithiophosphoric acid(D2EHDTPA) -trioctylamine (TOA) was investigated. Conductance titration and interfacial pressure measurement showed that when D2EHDTPA and TOA were mixed they reacted and formed an electrolyte of ionic pairs. The extraction of zinc by the electrolyte was of antisynergistic nature, and the reaction was Zn2+ + 2BHA((o)) --> ZnA(2(o)) + 2B((o)) + 2H(+) (subscript (o) stand for 'oil phase'). The zinc extraction was an endothermic reaction, the heat of reaction was 130.1 kJ . mol(-1). Some phenomena of interface concerned were also discussed.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2001年第2期189-192,共4页
Acta Physico-Chimica Sinica
基金
国家自然科学基金资助项目!( 59474009)&&
关键词
锌
溶剂萃取
反协同
有机硫代磷酸
三辛胺
界面性质
zinc
solvent extraction
antisynergism
thio-substituted organophosphoric acid
trioctylamine
interface properties
