无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2014, Vol. 46 ›› Issue (10): 18-.

• 论文 • 上一篇    下一篇

离子筛MnO2·0.4H2O的固相法制备及特性研究

王 昶1,王 希1,翟炎龙2,酒井裕司3,豆宝娟1   

  1. 1.天津科技大学海洋科学与工程学院,天津 300457;2.天津科技大学材料科学与化学工程学院;
    3.工学院大学工学部环境能源化学科
  • 出版日期:2014-10-10 发布日期:2014-10-09

Study on properties of lithium ion-sieve MnO2·0.4H2O prepared by solid state reaction

Wang Chang1,Wang Xi1,Zhai Yanlong2,Sakai Yuji3,Dou Baojuan1   

  1. 1.College of Marine Science & Engineering,Tianjin University of Science & Technology,Tianjin 300457,China;
    2.College of Material Science & Chemical Engineering,Tianjin University of Science & Technology;
    3.Department of Environmental Chemical Engineering,Kogakuin University
  • Online:2014-10-10 Published:2014-10-09

摘要: 以单水氢氧化锂和四氧化三锰为原料,用固相法制备出锂离子筛锰酸锂,改变n(锂)/n(锰)之后,用同样的方法制备出另一物质Li1.33Mn1.67O4,经硝酸洗涤脱锂后制备了锂离子筛MnO2·0.4H2O。测定了酸洗时前驱体的锂洗脱率、锰溶损率,研究了锂离子筛MnO2·0.4H2O的饱和吸附量、稳定性、pH滴定曲线。结果表明,前驱体Li1.33Mn1.67O4经硝酸二次酸洗后,锂洗脱率和锰溶损率分别为62.7%和6.0%。在含0.1 mol/L 氢氧化钠和10 mmol/L 氯化锂的溶液中,经固相法制备的锂离子筛MnO2·0.4H2O对锂离子的饱和吸附量达到24.6 mg/g,并且具有较好的稳定性,pH滴定曲线表明锂离子筛对锂离子具有很好的选择性。

关键词: 锂离子筛, 固相法, 吸附, Li1.33Mn1.67O4, MnO2·, 0.4H2O

Abstract: Lithium ion-sieve,MnO2·0.4H2O was obtained from spinel type precursor,Li1.33Mn1.67O4,treated with nitric acid. Li1.33Mn1.67O4 was synthesized from LiMn2O4 which was prepared with LiOH·H2O and Mn3O4 by solid state method with different amount-of-substance ratios of Li to Mn.Lithium extraction rate and manganese dissolving loss rate were determined,and saturated adsorption capacity,stability,and pH titration curve of lithium ion-sieve were also studied.The results suggested that the lithium extraction rate and the manganese dissolving loss rate were 62.7% and 6.0%,respectively,after the precursor was washed secondarily by nitric acid.In a 0.1 mol/L NaOH and 10 mmol/L LiCl mixed solution,the saturated adsorption capacity of MnO2·0.4H2O for Li+ was 24.6 mg/g,and lithium ion sieve had a good stability. pH titration curves suggested that lithium ion sieve MnO2·0.4H2O presented excellent selectivity for Li+.

Key words: lithium ion-sieve;solid state reaction;adsorption;Li1.33Mn1.67O4;MnO2·, 0.4H2O