Dibutyl carbitol (DBC) and methyl isobutyl ketone (MIBK) are commercially available for the extraction of Au(III) from acidic chloride media through ion solvation. These extractants show high Au(III) extractability, but their physical properties have drawbacks in extraction processes. In this study, Au(III) extraction using a series of aliphatic ketone compounds was studied to find a novel extractant with advantageous properties compared with conventional extractants. These ketone compounds showed desirable Au(III) extractability, with those bearing shorter aliphatic chains showing higher extractability. Furthermore, their Au(III) extraction capacities exceeded industrial requirements. These compounds also had improved properties for metal processing compared with commercial extractants, namely, lower solubility in water, lower viscosity, and high flash points. A representative extractant, 2-nonanone, selectively extracted Au(III) over various metal ions. Gold extracted with 2-nonanone was recovered quantitatively as metallic gold by reduction using oxalic acid.

中文翻译：

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使用物理性质优于当前商业萃取剂的酮化合物萃取金 (III)

二丁基卡必醇 (DBC) 和甲基异丁基酮 (MIBK) 可通过离子溶剂化从酸性氯化物介质中萃取 Au(III)。这些萃取剂显示出较高的 Au(III) 萃取能力，但它们的物理性质在萃取过程中存在缺陷。在本研究中，研究了使用一系列脂肪族酮化合物提取 Au(III)，以找到一种与传统萃取剂相比具有优越性能的新型萃取剂。这些酮化合物显示出理想的 Au(III) 可萃取性，带有较短脂肪链的化合物显示出更高的可萃取性。此外，它们的 Au(III) 提取能力超过了工业要求。与商业萃取剂相比，这些化合物还具有改进的金属加工性能，即在水中的溶解度较低、粘度较低、和高闪点。代表性萃取剂 2-壬酮通过各种金属离子选择性萃取 Au(III)。用 2-壬酮萃取的金通过使用草酸还原而定量回收为金属金。