Rapid Dissolution of Noble Metals in Organic Solvents.
Rapid Dissolution of Noble Metals in Organic Solvents.
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DOI：
10.1002/cssc.202201285
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发表时间：
2022-10-21
期刊：
影响因子：
8.4
通讯作者：
Love JB
中科院分区：
文献类型：
--
作者：
Nag A;Morrison CA;Love JB
元素贵金属（NM）如金、铂、钯和铜的溶解对于它们的回收是必要的，但由于使用强酸和有毒试剂而带来高的环境负担。在此，开发了一种新的方法，用于使用三苯基膦二氯化物或草酰氯和过氧化氢的混合物在有机溶剂中快速溶解元素NM，直接形成金属氯化物盐。在室温下，在几分钟内观察到金属Au、Pd和Cu的几乎定量溶解。对于Pt，单独使用氯化氧化剂实现溶解，尽管更慢，但在加入过氧化氢时被抑制。浸出后，转移的PtIV和PdII氯化物盐从有机相到6 M HCl水相促进其分离沉淀的PtIV使用一个简单的二酰胺配体。与此相反，保留在有机相中的AuIII chloridiquate允许其选择性分离镍和铜从浸出液中获得的电子CPU。这种新方法在从矿石、废催化剂以及电子和纳米废物中湿法冶金浸出和纯化纳米材料方面具有潜在的应用。 沥滤：贵金属如Au、Pd、Pt和Cu在有机溶剂中使用廉价且可回收的化学品三苯基膦二氯化物/草酰氯和绿色氧化剂过氧化氢快速浸出。这一过程可以取代传统的高毒性浸出方法，用于电子废物回收。
The dissolution of elemental noble metals (NMs) such as gold, platinum, palladium, and copper is necessary for their recycling but carries a high environmental burden due to the use of strong acids and toxic reagents. Herein, a new approach was developed for the rapid dissolution of elemental NMs in organic solvents using mixtures of triphenylphosphine dichloride or oxalyl chloride and hydrogen peroxide, forming metal chloride salts directly. Almost quantitative dissolution of metallic Au, Pd, and Cu was observed within minutes at room temperature. For Pt, dissolution was achieved, albeit more slowly, using the chlorinating oxidant alone but was inhibited on addition of hydrogen peroxide. After leaching, transfer of PtIV and PdII chloride salts from the organic phase into a 6 m HCl aqueous phase facilitated their separation by precipitation of PtIV using a simple diamide ligand. In contrast, the retention of AuIII chloridometalate in the organic phase allowed its selective separation from Ni and Cu from a leachate solution obtained from electronic CPUs. This new approach has potential application in the hydrometallurgical leaching and purification of NMs from ores, spent catalysts, and electronic and nano‐wastes. Leaching: Noble metals such as Au, Pd, Pt, and Cu are leached rapidly in organic solvents using the cheap and recyclable chemicals triphenylphosphinedichloride/oxalyl chloride, and the green oxidant hydrogen peroxide. This procedure could replace classical and highly toxic leaching methods for e‐waste recycling.
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影响因子：
16.6
作者：
Doidge, Euan D.;Carson, Innis;Love, Jason B.
通讯作者：
Love, Jason B.
影响因子：
16.6
作者：
通讯作者：
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DOI：
10.1073/pnas.2000606117
发表时间：
2020-07-14
影响因子：
11.1
作者：
Hong, Yeongran;Thirion, Damien;Yavuz, Cafer T.
通讯作者：
Yavuz, Cafer T.
影响因子：
16.6
作者：
Baksi, Ananya;Gandi, Mounika;Pradeep, Thalappil
通讯作者：
Pradeep, Thalappil
影响因子：
16.6
作者：
Raisanen, Minna;Heliovaara, Eeva;Repo, Timo
通讯作者：
Repo, Timo