高效锂离子筛吸附剂MnO_2·0.5H_2O的软化学合成及吸附性能研究  

Soft Chemical Synthesis and Adsorption Properties of MnO_2·0.5H_2O, a High Performance Ion Sieve for Lithium

作　　者：王禄[1] 马伟[1] 韩梅[1] 孟长功[1] 

机构地区：[1]大连理工大学化学系海水淡化与资源化开发研究中心,大连116024

出　　处：《化学学报》2007年第12期1135-1139,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.29777011)资助项目.

摘　　要：以MnCl2·4H2O,LiOH·H2O等试剂为初始原料,采用溶胶-凝胶、水热处理、固化等软化学合成步骤制备了锂离子筛前驱体Li1.6Mn1.6O4,并经稀盐酸抽锂后得到了高选择性锂离子筛吸附剂MnO2·0.5H2O.着重对合成过程中锂锰比,氧化剂用量等因素影响进行了探讨,并对所制备吸附剂的吸附性能进行了研究.结果表明,经软化学合成步骤制备的锂离子筛对Li+有良好的吸附量和选择性,在未来从海水、卤水等液态锂资源富集或提取锂的应用中具有很大的潜力.The precursor Li1.6Mn1.6O4 of lithium ion sieve was prepared with a selective starting reagents MnCl2·4H2O and LiOH·H2O by soft chemistry route such as sol-gel, hydrothermal and heat treatment. After extraction of Li＋ from Li1.6Mn1.6O4 with dilute hydrochloric acid, a high selective ion sieve for lithium MnO2·0.5H2O was obtained. The influence of Li ： Mn molar ratio and dosage of oxidant on the ion sieve character was discussed, and the adsorption properties were also studied. The results suggest that the lithium ion sieve prepared by soft chemistry route has high selectivity and adsorption capacity to Li^＋, and it is potential to be used in enrichment and recovery of lithium from seawater and other liquid lithium source.

关 键 词：锂离子筛 吸附 软化学合成 提锂 

分 类 号：TQ424[化学工程]