Recovery of indium from In2O3 and liquid crystal display powder via a chloride volatilization process using polyvinyl chloride

被引：93

作者：

Park, Kye-Sung ^{[1
]}

Sato, Wakao ^{[1
]}

Grause, Guido ^{[1
]}

Kameda, Tomohito ^{[1
]}

Yoshioka, Toshiaki ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

THERMOCHIMICA ACTA | 2009年 / 493卷 / 1-2期

关键词：

Chlorination; Indium; In2O3; PVC; Recovery; Liquid crystal display; CHLORINATION; METALS; DEGRADATION; MECHANISM; OXIDES;

D O I：

10.1016/j.tca.2009.03.003

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Indium (In) was recovered from indium oxide (In2O3) and liquid crystal display (LCD) powder via a chloride volatilization process using polyvinyl chloride (PVC) as the chlorination agent. The recovery of In from In2O3 increased with an increasing molar Cl/In ratio in N-2 and air atmospheres. The degree of In recovery at a Cl/In molar ratio of 11 and a temperature of 350 degrees C was 98.7% and 96.6%, for N-2 and air, respectively. The In recovery also increased notably with increasing temperature in N-2 atmosphere. In both atmospheres, the In recovery increased with an increasing degradation temperature of PVC. However, the In recovery from LCD powder was lower than that from In2O3. For LCD powder, the degree of In recovery at a Cl/In molar ratio of 11 and a temperature of 350 degrees C was 66.7% and 54.1%, for N-2 and air, respectively. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：105 / 108

页数：4

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