An efficient rough vacuum-chlorinated separation method for the recovery of indium from waste liquid crystal display panels
An efficient rough vacuum-chlorinated separation method for the recovery of indium from waste liquid crystal display panels
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一种高效粗真空氯化分离废旧液晶显示面板中回收铟的方法
DOI：
10.1039/c2gc36241d
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发表时间：
2012-11
期刊：
影响因子：
9.8
通讯作者：
Xu, Zhenming
中科院分区：
文献类型：
--
作者：
Ma, En;Lu, Rixin;Xu, Zhenming
研究了一种以NH4Cl为氯化剂的粗真空氯化分离方法，用于回收废旧液晶显示器（LCD）面板中的铟。首次在粗真空、空气和氮气气氛中研究了高纯In2O3和SnO2。结果表明，粗真空气氛可以提高铟的回收率，同时降低锡的影响。此外，在不同的冷凝温度下可以选择性地回收氯化铟和氯化铵，并分析了回收方法的热力学原理。通过纯物质实验确定了400℃，10 min，粗真空气氛（0.09 MPa）和充足的NH4Cl（摩尔Cl/In比为6）为最佳条件。利用废旧LCD玻璃粉回收铟。确定了NH4Cl与玻璃粉的重量比为1:2，最佳粒径小于0.13 mm。利用该方法成功地从废旧液晶面板中回收了纯氯化铟，铟的回收率和氯化铟的纯度分别为98.2%和99.50%。本研究为从废弃LCD面板中循环再生贵金属铟提供了一种有前途的技术。
In this study, an efficient rough vacuum-chlorinated separation method was developed for the recovery of indium from waste liquid crystal display (LCD) panels using NH4Cl as the chlorinating agent. High purity In2O3 and SnO2 were firstly investigated in a rough vacuum, air and nitrogen atmosphere. The results indicated that the rough vacuum atmosphere could increase the recovery ratio of indium and reduce the influence of tin simultaneously. Moreover, the indium chloride and NH4Cl can be selectively recovered under different condensing temperatures, and the thermodynamic principle of the recovery method was analyzed. Conditions of 400 °C, 10 min, rough vacuum atmosphere (0.09 MPa) and sufficient NH4Cl (molar Cl/In ratio of 6) were confirmed as the optimal conditions by pure substance experiments. The waste LCD glass powder was used to recover indium. The weight ratio of NH4Cl to glass powder and the optimum particle size were confirmed as 1 : 2 and less than 0.13 mm, respectively. The pure indium chloride was successfully recovered from the waste LCD panels using this method, and the recovery percentage of indium and the purity of indium chloride are 98.02 and 99.50%, respectively. This work presented a promising technology for the cyclic regeneration of the precious metal indium from waste LCD panels.
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影响因子：
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作者：
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通讯作者：
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