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 ›› 2025, Vol. 57 ›› Issue (7): 57-63.doi: 10.19964/j.issn.1006-4990.2024-0349

• 研究与开发 • 上一篇    下一篇

利用混晶TiO2为钛源合成高耐酸性钛系锂离子筛的研究

杨恒宇1(), 莫恒亮1(), 李天玉1, 吕龙1, 陈亦力2, 王珞聪1, 赵文芳1, 刘曼曼1   

  1. 1.北京华特源科技有限公司,北京 100089
    2.北京碧水源膜科技有限公司,北京 101400
  • 收稿日期:2024-06-20 出版日期:2025-07-10 发布日期:2024-08-13
  • 通讯作者: 莫恒亮(1988— ),博士,高级工程师,从事功能吸附材料的研究;E-mail:bsy_mohengliang@126.com
  • 作者简介:杨恒宇(1992— ),女,硕士,工程师,主要从事盐湖提锂吸附剂的开发;E-mail:bsy_yanghengyu@126.com
  • 基金资助:
    国家重点研发计划项目(2022YFC3203000)

Study on synthesis of high acid resistant Ti-based lithium ion sieve using mixed crystal TiO2 as titanium source

YANG Hengyu1(), MO Hengliang1(), LI Tianyu1, LÜ Long1, CHEN Yili2, WANG Luocong1, ZHAO Wenfang1, LIU Manman1   

  1. 1. Beijing Huateyuan Technology Co. ,Ltd. ,Beijing 100089,China
    2. Beijing Origin Water Membrane Technology Co. ,Ltd. ,Beijing 101400,China
  • Received:2024-06-20 Published:2025-07-10 Online:2024-08-13

摘要:

为提高钛系锂离子筛β-H2TiO3在工程应用过程中的耐酸性,以不同比例的金红石型和锐钛矿型TiO2为混晶钛源合成高耐酸性β-H2TiO3,研究了混晶钛源比例对锂离子筛吸附容量、离子选择性及耐酸性的影响,优化出混晶钛源的最佳比例,并对其进行了循环稳定性测试。结果表明,当钛源中锐钛矿型TiO2的质量分数为0、20%、40%、60%、80%和100%时,提高钛源中锐钛矿型TiO2含量,β-H2TiO3的吸附容量增加,且对离子选择性无明显负面影响。耐酸性结果表明,当钛源中锐钛矿型TiO2质量分数为40%时,能显著提高酸浸后的β-H2TiO3的质量剩余率,此时质量剩余率为65%,且剩余物的吸附性能衰减程度最小。对酸浸后的剩余物进行XRD和SEM表征,结果表明,采用1 mol/L盐酸浸泡β-H2TiO3,可使以单一晶型TiO2为钛源合成的β-H2TiO3生成锐钛矿型TiO2新物相;当钛源中锐钛矿型TiO2质量分数为40%时,合成的β-H2TiO3浸酸后无新物相生成。将其循环测试30次,吸附容量稳定在17 mg/g左右,基本无衰减,优于单一晶型TiO2为钛源合成的β-H2TiO3。综上所述,采用混晶TiO2为钛源制备锂离子筛,可提高锂离子筛的耐酸性及循环使用寿命,为工程上制备高稳定性钛系锂离子筛提供了方向及指导。

关键词: 盐湖提锂, 钛系锂离子筛, 混晶TiO2, 耐酸性, 吸附性

Abstract:

To improve acid resistance of Ti-based lithium ionic sieve β-H2TiO3 in the process of engineering application,the high acid-resistant β-H2TiO3 was synthesized in this study using different proportions of rutile and anatase TiO2 as mixed Ti sources.And the effect of the ratio of mixed crystal TiO2 on the adsorption capacity,ion selectivity and acid resistance of lithium ion sieve was studied.The optimal ratio of mixed crystal titanium source was also optimized and cyclic stability of the lithium ion sieve was tested.The resuils showed that when the mass content of anatase TiO2 in titanium source for synthesis of β-H2TiO3 were 0,20%,40%,60%,80% and 100%,increasing the anatase TiO2 content in the titanium source led to an increase in the adsorption capacity of β-H2TiO3,and there was no significant negative effect on ion selectivity.The acid resistance test results showed that when the content of anatase TiO2 in the titanium source was 40%,the mass residual rate of β-H2TiO3 after acid soaking could be significantly increased,which was 65%,and the attenuation degree of adsorption properties of the remaining was minimal.XRD and SEM characterization results of the residue after acid soaking showed the β-H2TiO3 synthesized from single crystal TiO2 as titanium source could form anatase type TiO2 new phase after soaking in 1 mol/L hydrochloric acid.When the anatase TiO2 content in the titanium source was 40%,no new phase formed after the β-H2TiO3 soaked with acid.The adsorption capacity of the β-H2TiO3 remained stable at about 17 mg/g after 30 cycles of testing,which was better than that of β-H2TiO3 synthesized by single crystal TiO2 as titanium source.In summary,using mixed crystal TiO2 as titanium source to synthesize lithium ion sieve could improve the acid resistance and cycle life.It provided direction and guidance for preparation of high stability Ti-based lithium ion sieve in engineering.

Key words: lithium extraction from salt lake, Ti-based lithium ion sieve, mixed crystal TiO2, acid resistance, adsorption capacity

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