Development of Li(I) Selective Polymeric Adsorbent Prepared by Surface Template Polymerization for Lithium Recovery from Seawater

表面模板聚合制备Li(I)选择性聚合物吸附剂用于海水回收锂的开发

• 批准号: 14550756
• 负责人: SAKOGUCHI Akihiro
• 金额: $ 2.3万
• 依托单位: Sojo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550756/
• 关键词: Lithium; Polymeric Adsorbent; Surface Template Polymerization; β-diketone; Synergistic Effect; Fluorine; Selectivity; Seawater

We have tried to prepare the Li(I) selective polymeric adsorbent by a surface template polymerization in order to develop a recovery process of Li(I) from seawater. The polymeric adsorbent were prepared by this technique utilizing a synergistic effect of a β-diketone and a neutral organophosphorus compound with W/O and W/O/W emulsions. Li(I) forms a complex with a Fluorine-containing β-diketone and trioctylphosphine oxide at the oil-water interface of W/O and W/O/W emulsions, and the Li(I) complex was imprinted on the surface of organic resins after the oil phase, in which divinylbenzene was used as the cross-linking agent, in the W/O and W/O/W emulsions was polymerized. Our polymeric adsorbents exhibited high adsorption ability towards target Li(I) over Na(I). Especially, a spherical polymeric adsorbent was created by a surface template polymerization utilizing W/O/W emulsion.We also synthesized the phosphinate-phenyl substituted β-diketone conjugates as novel bifunctional extractants for Li(I). The extraction equilibrium of Li(I) with the conjugates was investigated. It was found that their alkylchain length played an important role in lithium extraction. Furthermore, distribution and interfacial adsorption equilibria were examined. We found that the equilibrium constants of distribution and interfacial adsorption of the conjugates between organic and aqueous solutions were affected by their alkylchain length, and the interfaciaal area occupied by unit mole of the conjugates were proportional to their alkylchain length.We will synthesize new fluorine-containing bifunctional extractants and prepare the Li(I) selective polymeric adsorbents with the new extractants to achieve high adsorption ability towards Li(I).

我们尝试通过表面模板聚合制备Li(I)选择性聚合物吸附剂，以开发从海水中回收Li(I)的工艺。利用β-二酮和中性有机磷化合物与W/O和W/O/W乳液的协同作用，通过该技术制备了聚合物吸附剂。 Li(I)与含氟β-二酮和三辛基氧化膦在W/O和W/O/W乳液的油水界面形成络合物，W/O和W/O/W乳液中以二乙烯基苯为交联剂的油相聚合后，Li(I)络合物印迹在有机树脂表面。我们的聚合物吸附剂对目标 Li(I) 的吸附能力高于 Na(I)。特别是，利用W/O/W乳液通过表面模板聚合制备了球形聚合物吸附剂。我们还合成了次膦酸盐-苯基取代的β-二酮缀合物作为新型双功能Li(I)萃取剂。研究了 Li(I) 与缀合物的萃取平衡。研究发现，它们的烷基链长度在锂提取中起着重要作用。此外，还检查了分布和界面吸附平衡。我们发现有机物和水溶液之间的结合物的分布和界面吸附平衡常数受其烷基链长度的影响，并且单位摩尔结合物所占据的界面面积与其烷基链长度成正比。我们将合成新型含氟双功能萃取剂并制备Li(I)选择性聚合物吸附剂 新型萃取剂对Li(I)具有高吸附能力。

项目成果

Li(I) Selective Adsorption by Means of Organic Resins Imprinted with Fluorine-containing β-Diketone and Neutral Phosphorus Compound

含氟β-二酮和中性磷化合物印迹有机树脂选择性吸附Li(I)

• 发表时间: 2003
• 期刊: Journal of Ion Exchange Vol.14・Supplement
• 作者: Akihiro Sakoguchi;Kentaro Noda;Fumiyuki Nakashio;Masahiro Goto
• 通讯作者: Masahiro Goto

Akihiro Sakoguchi: "Li(I) Selective Adsorption by Means of Organic Resins Imprinted with Fluorine-containing β-Diketone and Neutral Phosphorus Compound"Journal of Ion Exchange. Vol.14・Supplement. 333-336 (2003)

Akihiro Sakoguchi：“通过含氟β-二酮和中性磷化合物印迹的有机树脂选择性吸附Li(I)”，《离子交换杂志》第14卷·增刊（2003年）。