摘要
目前,国内外的锂离子吸附剂主要分为锰系吸附剂和钛系吸附剂两类。锰系吸附剂吸附容量不高,而且在酸洗及过滤过程中损失较大,难以实现工业化生产。钛系吸附剂具有较高的吸附容量,并且在吸附和脱附过程中内部结构保持稳定,溶损较小,具有良好的研究前景。采用二氧化钛与碳酸锂为原料,严格控制二者的配比,并在不同高温条件下发生固相合成反应,生成锂离子筛前体Li4Ti5O12。再用2 mol/L的盐酸对该锂离子筛前体进行洗脱,当此锂离子筛中的锂被完全洗脱下来后,制得了新型锂离子吸附剂H4Ti5O12。对该吸附剂作饱和吸附后,测得其饱和吸附容量QT达到32.29 mg/g。
The lithium ion adsorbents are mainly divided into two kinds at home and abroad, one kind is the manganese adsorbent, another kind is the titanium adsorbent.Not only the capacity of Mn adsorption is low, but also the loss is large in the acidic washing-and filtration-processes.So it is difficult to achieve industrial production.Adsorption of Ti has high adsorption capacity,and the internal structure maintains stability during the adsorption-and desorption-processes, and the loss is smaller.Absolutely the prospect for the study is bright.With TiO2 and Li2CO3 as raw materials ,their ratio was strictly controlled.The solid-phase synthesis reaction was made at the different high temperatures and the precursor of lithium ion sieve Li4Ti5O12 was obtained.Then 2 mol/L hydrochloric acid was used on the precursor of lithium ion sieve for elution.When the lithium in the ion sieves were totally washed down, the new lithium ion adsorbent H4Ti5O12 was prepared.When finished the saturated adsorption experiment by using of this adsorbent, its saturated adsorption capacity QT reached 32.29 mg/g.
出处
《无机盐工业》
CAS
北大核心
2014年第2期38-40,共3页
Inorganic Chemicals Industry
