A Simple Primary Amide for the Selective Recovery of Gold from Secondary Resources
A Simple Primary Amide for the Selective Recovery of Gold from Secondary Resources
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DOI：
10.1002/anie.201606113
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发表时间：
2016-09-26
影响因子：
16.6
通讯作者：
Love, Jason B.
中科院分区：
文献类型：
--
作者：
Doidge, Euan D.;Carson, Innis;Love, Jason B.
废弃的电气和电子设备（WEBs），如移动的电话，含有过多的金属，其中黄金是迄今为止最有价值的。本文描述了一种简单的伯酰胺，其通过从HCl水溶液中萃取到甲苯中来实现金与通常在移动的电话中发现的金属混合物的选择性分离;与当前方法不同，仅使用水实现反相转移。发生相转移的动态组装质子化和中性酰胺与[AuCl 4]（-）离子通过氢键在有机相，如EXAFS，质谱测量和计算计算所示，并支持分配系数分析。在此获得的基本化学理解应该是金属回收工艺开发的组成部分，特别是通过使用动态组装工艺从简单中构建复杂性。
Waste electrical and electronic equipment (WEEE) such as mobile phones contains a plethora of metals of which gold is by far the most valuable. Herein a simple primary amide is described that achieves the selective separation of gold from a mixture of metals typically found in mobile phones by extraction into toluene from an aqueous HCl solution; unlike current processes, reverse phase transfer is achieved simply using water. Phase transfer occurs by dynamic assembly of protonated and neutral amides with [AuCl4](-) ions through hydrogen bonding in the organic phase, as shown by EXAFS, mass spectrometry measurements, and computational calculations, and supported by distribution coefficient analysis. The fundamental chemical understanding gained herein should be integral to the development of metal-recovery processes, in particular through the use of dynamic assembly processes to build complexity from simplicity.