The recycling of indium from E-waste is extremely useful due to concerns correlated with its limited supply in future. In the present work one of the phosphonium ionic liquid (PIL), Cyphos IL104 [tetradecyl-(trihexyl) phosphonium bis-(2,4,4-trimetylpentyl) phosphinate] diluted in toluene was used as an extractant to separate, extract and recover metals from discarded LCD screen. Factors affecting the solvent extraction behaviour of indium such as shaking time, acid/extractant concentration, temperature and chloride ion concentration of the aqueous phase were examined systematically. Saturation and recycling power of Cyphos IL 104 has also been determined. Optimized condition have been employed to recover indium, zinc and tin from the discarded LCD screen leach liquor containing In – 160 mg L^-1, Sn – 494 mg L^-1, Zn – 110 mg L^-1, Fe – 2911 mg L^-1, Al – 1231 mg L^-1, Mn – 217 mg L^-1, Ca – 3132 mg L^-1 and Sr – 311 mg L^-1. The number of stages required for extraction and stripping were determined from the McCabe-Thiele diagrams and confirmed by counter current studies carried out with discarded LCD leach liquor. It was found that quantitative extraction of In, Zn and Sn is accomplished in two stages at A/O = 3/2, using 0.1 mol L^-1 Cyphos IL 104. In, Zn and Sn were stripped quantitatively with selective stripping agents in two stages at O/A = 3/2. After separation the three metals were recovered by precipitation and calcination as metal oxide/sulphide and were characterized by FE-SEM, EDX and XRD techniques.

从电子废物中回收铟非常有用，这是由于人们担心其未来的供应量有限。在本工作中，一种diluted离子液体（PIL），Cyphos IL104 [在甲苯中稀释的双-（2,4,4-三甲戊基戊基）次膦酸酯的十四烷基-（三己基）phospho双-（2,4,4-三甲基戊基）次膦酸酯]用作提取剂进行分离，提取和回收。丢弃的LCD屏幕上的金属。系统地研究了影响铟溶剂萃取行为的因素，例如振荡时间，酸/萃取剂浓度，温度和水相中氯离子浓度。还已经确定了Cyphos IL 104的饱和和再循环能力。已采用优化条件从废弃的LCD屏幕浸出液中回收In，160 mg L ^-1，Sn – 494 mg L的铟，锌和锡。^-1，锌– 110 mg L ^-1，铁– 2911 mg L ^-1，铝– 1231 mg L ^-1，锰– 217 mg L ^-1，钙– 3132 mg L ^-1和Sr – 311 mg L ^-1。从McCabe-Thiele图确定萃取和汽提所需的阶段数，并通过对废弃的LCD浸出液进行逆流研究来证实。已发现，使用0.1 mol L ^-1在A / O = 3/2的情况下分两步完成In，Zn和Sn的定量萃取Cyphos IL104。用选择性剥离剂在O ​​/ A = 3/2的两个阶段中对In，Zn和Sn进行了定量剥离。分离后，通过沉淀和煅烧将三种金属作为金属氧化物/硫化物回收，并通过FE-SEM，EDX和XRD技术进行表征。