New Malonamide Polyethoxylated Surfactant for Eco-friendly Ion Foam Flotation Process

用于环保离子泡沫浮选工艺的新型丙二酰胺聚乙氧基化表面活性剂

• 批准号: 22K20487
• 负责人: Micheau Cyril
• 金额: $ 1.83万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-08-31 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K20487/
• 关键词: Flotation; Malonamide; Foam; Interface; Synthesis

This work aims to develop a new surfactant system for the extraction and separation of rare earth elements and/or platinum group metals using the ion foam flotation process. For this purpose, synthesis and characterisation of a new malonamide polyethoxylated surfactant is consider. For the synthesis, two main routes are planned: (i) esterification between the polyethoxylated carboxylic acid surfactant AKYPO LS-O90 and the N(1), N(3)-Bis(2-hydroxyethyl)malonamide, and (ii) alkylation between malonamide molecule and the polyethoxylated alcohol surfactant BrijO10 (or Brij S10). Reactants have been ordered and received, and the characterisation of surfactants were performed in term of purity, pKa and micelle surface charge. Additional synthesis routes are being consider in order to reduce reactant cost and synthesis steps. For the characterisation of the process in term of flotation efficiency and microstructure through SANS and NR analyses, dedicated columns (and flowmter) were designed, ordered and received. Technical feasibility of SANS experiments on foam with the new column has been demonstrated with a model surfactant system. NR measurement on malonamide standard systems has been performed at J-PARC, MLF, as a preliminary experiment and had demonstrated the feasibility of analysing liquid-air interfaces. Finally, these preliminary analyses allowed redacting and submitting two articles in peer reviewed journal.

本工作旨在开发一种新的表面活性剂体系，用于离子泡沫浮选过程中萃取和分离稀土元素和/或铂族金属。为此，合成和表征一种新的丙二酰胺聚乙氧基化表面活性剂被认为是。对于合成，计划了两条主要路线：（i）聚乙氧基化羧酸表面活性剂AKYPO LS-090与N（1），N（3）-双（2-羟乙基）丙二酰胺之间的酯化，和（ii）丙二酰胺分子与聚乙氧基化醇表面活性剂BrijO 10（或Brij S10）之间的烷基化。反应物已订购和接收，并在纯度，pKa和胶束表面电荷方面进行表面活性剂的表征。正在考虑其他合成路线，以减少反应物成本和合成步骤。为了通过SANS和NR分析在浮选效率和微观结构方面表征该过程，设计、订购和接收了专用柱（和流量计）。用模拟表面活性剂体系证明了用新柱对泡沫进行SANS实验的技术可行性。作为初步的实验，在J-PARC，MLF进行了丙二酰胺标准体系的NR测量，并证明了分析液-气界面的可行性。最后，这些初步分析允许编辑并在同行评审期刊上提交两篇文章。

项目成果

Deuterated Malonamide Synthesis for Fundamental Research on Solvent Extraction Systems

用于溶剂萃取系统基础研究的氘代丙二酰胺合成

• DOI: 10.1080/07366299.2023.2166351
• 发表时间: 2023
• 期刊: Solvent Extraction and Ion Exchange
• 影响因子: 2
• 作者: Micheau Cyril;Ueda Yuki;Akutsu-Suyama Kazuhiro;Bourgeois Damien;Motokawa Ryuhei
• 通讯作者: Motokawa Ryuhei

マルクール分離化学研究所(フランス)

Marcoul 分离化学实验室（法国）

Deuterated malonamide synthesis to probe interfacial mechanisms involved in solvent extraction process

氘代丙二酰胺合成探索溶剂萃取过程中涉及的界面机制

• 发表时间: 2023
• 作者: 坪井 隆真;平野 知之;高野 葵;片岡 幹裕;荻 崇;Cyril Micheau
• 通讯作者: Cyril Micheau