Recovery of indium from scrap TFT-LCDs by solvent extraction

摘要：

　　Recovery of indium from scrap LCDs,which contain indium in the form of indium tin oxide (1TO) films,is becoming economically and environmentally justified.Indium is a precious metal and the present study was aimed to recover indium from scrap TFT-LCDs by solvent extraction which was based upon H2SO4 acid leaching-D2EHPA extraction-HCl back extraction.The results showed that indium could be better leached in H2SO4 (1∶1,v/v) acid solution in the optimal liquid/solid ratio of 1∶1 while other metals leaching concentrations were relatively low.Indium could be selectively extracted from its H2SO4 solutions by 30% D2EHPA with O/A ratio of 1∶5 within 5 min,and be completely stripped by 4M HCl from D2EHPA with A/O ratio of 1∶5,the final extraction efficiency achieved more than 97%.

关键词： scrap TFT-LCDs indium solvent extraction D2EHPA back-extraction strip

作者: Jiuli Ruan Yuwen Guo Qi Qiao

作者单位: Key Laboratory of Eco-Industry of the Ministry of Environmental Protection.Chinese Research Academy of Environmental Sciences, Beijing 100012, China

会议类型: 国际会议

会议名称: The Seventh International Conference on Waste Management and Technology(第七届固体废物管理与技术国际会议(ICWMT7))

会议地点: 北京

会议语种:英文

页码: 545-551

在线出版日期: 2012-09-05（万方平台首次上网日期，不代表论文的发表时间）