| 苯甲酸-双2-乙基己基-磷酸酐的合成与应用 |
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| 引用本文： | 马昕,陈前林,余明,章新,刘韵琦.苯甲酸-双2-乙基己基-磷酸酐的合成与应用[J].矿冶工程,2017,37(3):101-104. |
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| 作者姓名： | 马昕 陈前林 余明 章新 刘韵琦 |
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| 作者单位： | 1.贵州大学 化学与化工学院, 贵州 贵阳 550003;
2.贵州磷化工清洁生产工程技术研究中心, 贵州 贵阳 550003 |
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| 基金项目： | 国家自然科学基金(21461005)；
黔科合平台人才【2016】5658 |
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| 摘 要： | 以P204(双2-乙基己基-磷酸酯)、苯甲酸为原料, 经酰化反应, 合成了目标化合物苯甲酸-双2-乙基己基-磷酸酐, 较佳合成条件为: 以三乙胺为缚酸剂, n(P204)∶n(苯甲酸)=1∶1.1, 反应温度为0 ℃。该合成方法产率较高, 成本低廉, 反应条件温和, 操作简便。利用苯甲酸-双2-乙基己基-磷酸酐作为流动载体制得的乳状液膜体系直接萃取高酸度(pH=-0.18)且成分复杂的磷矿浸出液中的低浓度稀土离子, 其萃取率比P204的萃取率提高了20个百分点, 显示出良好的萃取性能。
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| 关 键 词： | 苯甲酸 P204 苯甲酸-双2-乙基己基-磷酸酐 合成 稀土离子 萃取 |
| 收稿时间： | 2016-12-19 |
Synthesis and Application of Benzoic Acid-D2EHPA |
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| MA Xin,CHEN Qian-lin,YU Ming,ZHANG Xin,LIU Yun-qi.Synthesis and Application of Benzoic Acid-D2EHPA[J].Mining and Metallurgical Engineering,2017,37(3):101-104. |
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| Authors: | MA Xin CHEN Qian-lin YU Ming ZHANG Xin LIU Yun-qi |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550003, Guizhou, China;
2.Guizhou Engineering & Technology Research Center of Clean Production in Phosphorus Chemical Industry, Guiyang 550003, Guizhou, China |
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| Abstract: | Benzoic acid-bis2-ethylhexyl-phosphoric acid anhydride was synthesised with P204 (D2EHPA) and benzoic acid as raw materials through an acylation reaction, with the following optimum conditions, including triethylamine as a deacid reagent, D2EHPA/benzoic acid molar ratio of 1∶1.1, a reaction temperature of 0 ℃. It is found such synthesis method is characterized by high production rate, low cost, mild reaction condition and simple operation. Rare earth ion in the low-concentrated phosphorite lixivium at pH of -0.18 was directly extracted with benzoic acid-D2EHPA, instead of D2EHPA, leading to the extraction rate increased by 20 percentage points, showing a good extraction performance. |
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| Keywords: | benzoic acid D2EHPA benzoic acid-D2EHPA synthesis rare earth ion extraction |
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