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Selective recovery of platinum and palladium from Asahi's PLS in chloride medium

在氯化物介质中从旭化成 PLS 中选择性回收铂和钯

基本信息

批准号：
507599-2016
负责人：
Alam, Shafiq
金额：
$ 1.82万
依托单位：
University of Saskatchewan
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2016
资助国家：
加拿大
起止时间：
2016-01-01 至 2017-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=610427
关键词：
Selective recovery platinum palladium Asahi

项目摘要

Gold, silver and platinum group metals (PGM) including platinum and palladium are named as "Precious Metals", which are very expensive and are widely used not only as traditional jewelries but also as useful components in a variety of well-known advanced materials including electronic devices. Asahi Refining Canada Ltd., a subsidiary of Asahi Holdings, produces precious metals (gold and silver) by leaching secondary materials coming from the mining and recycling industries including electronic wastes (e-wastes). After leaching, the pregnant leach solution (PLS) contains gold, silver, platinum, palladium and some base metals in a chloride medium. Currently, Asahi Refining only produces metallic gold and silver by recovering them from this leach solution leaving behind all other expensive PGM in the PLS, because they do not have a suitable process yet to selectively recover platinum and palladium in that process conditions. The applicant (Dr. Alam), has extensive experiences recovering different kinds of precious metals including PGM from chloride media using hydrometallurgical techniques. In this proposed project, he will selectively recover the remaining precious metals (platinum and palladium) from the Asahi's PLS using bioadsorbents with novel functional groups prepared from biomass wastes derived from agriculture, forest and marine resources. If the proposed cost-effective, sustainable and environmentally friendly process is successful, it would be an innovative technique to adopt in Asahi's current process flowsheet that will generate extra profit and boost the precious metals recycling business of Asahi Refining.

包括铂和钯在内的金、银和铂族金属(PGM)被称为贵金属，它们非常昂贵，不仅作为传统的珠宝被广泛使用，而且作为包括电子设备在内的各种知名先进材料的有用元件。朝日精炼加拿大有限公司是朝日控股的子公司，通过浸出来自采矿和回收行业的二次材料来生产贵金属(金和银)，其中包括电子废物(电子废物)。浸出后的孕液在氯化物介质中含有金、银、铂、钯和一些贱金属。目前，Asahi Refining只通过从这种浸出液中回收金属金和银来生产金属金和银，而不是在PLS中生产所有其他昂贵的PGM，因为在这种工艺条件下，他们还没有合适的工艺来选择性地回收铂和钯。申请人(Alam博士)拥有使用湿法冶金技术从氯化物介质中回收包括PGM在内的各种贵金属的丰富经验。在这个拟议的项目中，他将使用从农业、森林和海洋资源产生的生物质废物中制备的具有新官能团的生物吸附剂，选择性地从朝日的PLS中回收剩余的贵金属(铂和钯)。如果拟议的具有成本效益、可持续和环保的工艺成功，那么在朝日当前的工艺流程中采用这项创新技术将会产生额外的利润，并促进朝日精炼的贵金属回收业务。