Organic oxalate as leachant and precipitant for the recovery of valuable metals from spent lithium-ion batteries
Organic oxalate as leachant and precipitant for the recovery of valuable metals from spent lithium-ion batteries
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DOI：
10.1016/j.wasman.2012.03.027
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发表时间：
2012-08-01
期刊：
影响因子：
8.1
通讯作者：
Qiu, Keqiang
中科院分区：
文献类型：
--
作者：
Sun, Liang;Qiu, Keqiang
废旧锂离子电池含有大量的钴、锂等战略资源，被认为是一种极具吸引力的二次资源。本文采用真空热解-草酸盐浸出-沉淀的环保工艺从废旧锂离子电池中回收钴和锂。以草酸盐为浸取剂，同时作为沉淀剂，在80 ℃、固液比为50 g L-1、1.0 M草酸盐溶液中浸取120 min，直接将LiCoO 2和CoO中的钴以CoC 2 O 4中心点2 H（2）O的形式析出，反应效率大于98%，在湿法冶金过程中，可以实现LiCoO 2的分离，并且还可以有效地分离钴和锂。该组合工艺简单，适用于从废旧锂离子电池中回收有价金属。皇冠版权所有（c）2012由爱思唯尔有限公司出版。保留所有权利。
Spent lithium-ion batteries containing lots of strategic resources such as cobalt and lithium are considered as an attractive secondary resource. In this work, an environmentally compatible process based on vacuum pyrolysis, oxalate leaching and precipitation is applied to recover cobalt and lithium from spent lithium-ion batteries. Oxalate is introduced as leaching reagent meanwhile as precipitant which leaches and precipitates cobalt from LiCoO2 and CoO directly as CoC2O4 center dot 2H(2)O with 1.0 M oxalate solution at 80 degrees C and solid/liquid ratio of 50 g L-1 for 120 min. The reaction efficiency of more than 98% of LiCoO2 can be achieved and cobalt and lithium can also be separated efficiently during the hydrometallurgical process. The combined process is simple and adequate for the recovery of valuable metals from spent lithium-ion batteries. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.