Selective removal of magnesium from lithium‐rich brine for lithium purification by synergic solvent extraction using β‐diketones and Cyanex 923

摘要

Abstract > In the production of battery‐grade and high‐purity Li <sub>2</sub> CO <sub>3</sub> , it is essential to remove magnesium impurities. The state‐of‐the‐art solvent extraction (SX) process using Versatic Acid 10 and D2EHPA co‐extracts 3.3–5.5% lithium, while removing 86–98% magnesium. Here, we demonstrate that synergic SX systems containing a β‐diketone (HPMBP, HTTA or HDBM) and Cyanex 923 are highly selective for magnesium extraction over lithium (separation factor <fi>α</fi> ??1,000). The extracted magnesium and lithium complexes have the stoichiometry of [Mg?A <sub>2</sub> ?(C923) <sub>2</sub> ] and [Li?A <sub> <fi>x</fi> </sub> ?(C923) <sub>2</sub> ] ( <fi>x</fi> = 1, 2), respectively (A represents deprotonated β‐diketone). The three β‐diketone synergic SX systems all considerably outperformed the Versatic Acid 10 system for magnesium removal from a synthetic solution containing 24?g?L ?1 Li and 0.24?g?L ?1 Mg. In a three‐stage batch counter‐current extraction, the HPMBP and Cyanex 923 synergic SX system removed 100% magnesium with only 0.6% co‐extraction of lithium. This excellent Mg/Li separation is the best result reported so far. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 在电池级和高纯度的生产中 <sub> 2 </ sub> CO. <sub> 3 </ sub> ，必须除去镁杂质。使用Useratic酸10和D2ehPa共提取3.3-5.5％锂的最先进的溶剂萃取（SX）工艺，同时除去86-98％的镁。在此，我们证明含有β-Diketone（HPMBP，HTTA或HDBM）和CYANEX 923的协同SX系统对于锂的镁提取是高度选择性的（分离因子 <fi>α</ fi> ？＆？1,000）。提取的镁和锂配合物具有[mg吗？a的化学计量 <sub> 2 </ sub> ？（C923） <sub> 2 </ sub> [李吗？一个 <sub> <fi> x </ fi> </ sub> ？（C923） <sub> 2 </ sub> ]（ <fi> x </ fi> 分别= 1,2）（a代表反质β-diketone）。三个β-diketone协同SX系统均相当优于含有24Ω··升的合成溶液的镁氧化物10系统。？1 </ sup> li和0.24？g？l ？1 </ sup> 镁。在三级批量逆流提取中，HPMBP和CYANEX 923协同SX系统除以100％镁，仅具有0.6％的锂电锂。这一优秀的Mg / Li分离是到目前为止报告的最佳结果。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-18537/'>《AIChE Journal 》</a> <b style="margin: 0 2px;">|</b><span>2020年第7期</span><b style="margin: 0 2px;">|</b> <span>共12页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/238.html" title="化学工业">化学工业 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cyanex 923&option=203" rel="nofollow">Cyanex 923;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=β‐diketone&option=203" rel="nofollow">β‐diketone;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=lithium&option=203" rel="nofollow">lithium;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=magnesium&option=203" rel="nofollow">magnesium;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=synergic solvent extraction&option=203" rel="nofollow">synergic solvent extraction;</a> </p> <div class="translation"> 机译：Cyanex 923;β-二酮;锂;镁;协同溶剂萃取; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704022505743.html">Selective removal of magnesium from lithium‐rich brine for lithium purification by synergic solvent extraction using β‐diketones and Cyanex 923</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> </a> <a href="/journal-foreign-18537/" target="_blank" rel="nofollow" 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