废LED封装中稀贵金属的有机溶剂法分离与富集  

Separation and Enrichment of Rare and Precious Metals in Waste LED Package by Organic Solvent Method

作　　者：张安琪 李商略 庄绪宁[1,2] ZHANG Anqi;LI Shanglue;ZHUANG Xuning(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Engineering Research Center of Advanced Thermal Functional Materials,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209 [2]上海第二工业大学上海电子废弃物资源化协同创新中心,上海201209

出　　处：《上海第二工业大学学报》2023年第2期104-110,共7页Journal of Shanghai Polytechnic University

基　　金：国家重点研发计划项目(2019YFC1906100)资助。

摘　　要：随着发光二极管(light-emmitting diode,LED)产品的广泛使用以及电子技术的快速发展,未来必将产生大量废LED有待处理,废LED中含有的稀贵金属Au、Ga具有极大的回收价值与潜力。围绕废LED中稀贵金属Au、Ga的分离与富集问题,提出采用二甲基甲酰胺溶剂法对废LED中的金属进行分离与富集。研究结果显示,当反应温度为150℃,反应时间为50 min,搅拌转速为300 r/min,液固比为15 mL/g时,采用纯二甲基甲酰胺作为反应体系可实现Au、Ga的高效分离与富集,金属Au、Ga的分离富集率分别为72.8%和93.5%,富集所得样品中金属Au、Ga的浓度相较于LED封装中的初始浓度分别富集2.3和2.9倍。With the widespread use of light-emitting diode(LED)products and the rapid development of electronic technology,a large number of waste LEDs will be produced in the future,and the rare and precious metals Au and Ga contained in waste LEDs have great recycling value and potential.Focusing on the separation and enrichment of rare and precious metals Au and Ga in waste LEDs,this study proposes dimethylformamide solvent method to separate and enrich the metals in waste LEDs.The results show that when the reaction temperature is 150℃,the reaction time is 50 min,the stirring speed is 300 r/min,and the liquid-solid ratio is 15 mL/g,using pure dimethylformamide as reaction system can realize the efficient separation and enrichment of Au and Ga.The separation and enrichment rates of Au and Ga are 72.8%and 93.5%,respectively.The concentration of Au and Ga in the enriched sample is 2.3 and 2.9 times that of the initial samples in the LED package.

关 键 词：废发光二极管 贵金属金 稀有金属镓 分离与富集 有机溶剂法 二甲基甲酰胺 

分 类 号：X705[环境科学与工程—环境工程]