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 ›› 2021, Vol. 53 ›› Issue (6): 140-144.doi: 10.19964/j.issn.1006-4990.2020-0439

• 研究与开发 • 上一篇    下一篇

铝基锂吸附剂制备及其在泰和地下卤水提锂中的应用

程鹏高(),黄传峰,甘善甜,龚经款,项军,唐娜()   

  1. 天津科技大学化工与材料学院,天津 300457
  • 收稿日期:2020-09-24 出版日期:2021-06-10 发布日期:2021-07-08
  • 通讯作者: 唐娜
  • 作者简介:程鹏高(1982— ),男,工程师,研究方向为海卤水资源综合利用;E-mail: cpg@tust.edu.cn
  • 基金资助:
    天津市自然科学基金(18JCZDJC37200)

Preparation of aluminum-based lithium adsorbent and its application in extracting lithium from Taihe underground brine

Cheng Penggao(),Huang Chuanfeng,Gan Shantian,Gong Jingkuan,Xiang Jun,Tang Na()   

  1. College of Chemical Engineering and Material Science,Tianjin University of Science and Technology,Tianjin 300457,China
  • Received:2020-09-24 Online:2021-06-10 Published:2021-07-08
  • Contact: Tang Na

摘要:

中国锂资源丰富,但是大部分存在于卤水中,提取利用困难。为提高泰和地下卤水提锂过程的效率,制备了高性能的铝基锂吸附剂。采用一步法制备了铝基锂吸附剂。通过X射线粉末衍射仪表征了铝基锂吸附剂的晶型结构。研究了加料方式、铝锂物质的量比、反应终点pH、反应温度、加料速率、搅拌转速等因素对铝基锂吸附剂吸附容量的影响。确定了铝基锂吸附剂的最佳制备条件:将氢氧化钠溶液滴加到氯化铝和氯化锂的混合液中,铝锂物质的量比为1.25∶1,反应终点pH为6~7,反应温度为75 ℃,氢氧化钠溶液滴加速率为3 mL/min,搅拌转速为100 r/min。将制备的铝基锂吸附剂应用于泰和地下卤水的提锂过程,结果显示铝基锂吸附剂的平均吸附容量高达15.06 mg/g、平均脱附容量为14.11 mg/g、脱附效率为93.69%。

关键词: 锂资源, 吸附, 铝基锂吸附剂, 共沉淀

Abstract:

China has rich lithium resources,but most of them exist in brine,so it is difficult to extract and utilize.In order to improve the efficiency of lithium extraction process in Taihe underground brine,the high performance aluminum-based lithium adsorbent was prepared.The aluminum-based lithium adsorbent was prepared by one step method.The crystal structure was characterized by X-ray powder diffraction.The influence of the feeding mode,the ratio of the aluminum lithium substantial amount,the pH at the end of the reaction,the reaction temperature,the rate of feeding and the stirring speed on the adsorption capacity of the adsorbent were studied.The optimum preparation conditions of the sorbent were determined:the ratio of the content to the aluminum lithium substance was 1.25∶1,the pH of the reaction terminal point was 6~7,the reaction tempera-ture was 75 ℃,the acceleration rate of the sodium hydroxide solution was 3 mL/min,and the stirring speed was 100 r/min. The results showed that the average adsorption capacity of the adsorbent was 15.06 mg/g,the average desorption capacity was 14.11 mg/g and the desorption efficiency was 93.69%.

Key words: lithium resources, adsorption, aluminum-based lithium adsorbent, coprecipitation

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