• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Molecules >Utilizing Recyclable Task-Specific Ionic Liquid for Selective Leaching and Refining of Scandium from Bauxite Residue
【2h】

Utilizing Recyclable Task-Specific Ionic Liquid for Selective Leaching and Refining of Scandium from Bauxite Residue

机译：利用可回收的任务特异性离子液体用于选择性浸出和从铝土矿残留钪的钪

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ionic liquids (ILs) have attracted great interest in the field of extractive metallurgy mainly because they can be utilized in low temperature leaching processes where they exhibit selectivity and recyclability. A major drawback in mixed aqueous-IL systems, is IL dissolution in the aqueous phase, which leads to IL losses, increasing the overall processing cost. This study advances the method for recovering scandium (Sc) from bauxite residue (BR) using as leaching agent the IL betainium bistriflimide, [Hbet][Tf2N] mixed with water, which has been reported in previous publications. Ionic liquid leachate (IL-PLS) was prepared by leaching BR with a mixture of [Hbet][Tf2N]-H2O and subjected to different stripping experiments using hydrochloric acid. The advancement, presented in this work, is related with the optimization of the metal extraction (stripping) from the IL-PLS, where an aqueous solution with high Sc concentration and minimum metal impurities and minimum IL co-extraction is produced. It is further proven that the metal cation extraction is defined by the stoichiometry of the acidic solution and the dissolution (losses) of the IL in the aqueous phase can be minimized by adjusting the volume ratio and the acid concentration. A two-step stripping process described, achieves the selective increase of Sc concentration by 8 times in the aqueous solution, while maintaining cumulative IL losses to similar levels as the optimum 1 step non-Sc selective stripping process.
机译：离子液体（ILS）吸引了促进冶金领域的兴趣，主要是因为它们可以用于低温浸出过程，其中它们表现出选择性和可回收性。混合水溶液系统中的一个主要缺点是水相中的IL溶解，这导致IL损耗，增加了整体加工成本。该研究通过作为浸出剂，与水混合的浸出剂，使用浸出剂来回收铝土矿残留物（BR）的碳酸钪（SC）的方法进行了预先用水。通过用[HBET] [TF2N] -H2O的混合物浸出Br，并使用盐酸进行不同的剥离实验，制备离子液体渗滤液（IL-PLS）。在这项工作中提出的进步与IL-PLS的金属萃取（剥离）的优化有关，其中产生具有高SC浓度和最小金属杂质和最小II共萃取的水溶液。进一步证明金属阳离子提取由酸性溶液的化学计量来限定，通过调节体积比和酸浓度，可以最小化水相中的IL的溶解（损失）。描述的两步汽提工艺在水溶液中达到8次SC浓度的选择性增加，同时将累积的IL损耗保持在与最佳的1步非SC选择性剥离过程中的类似水平。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号