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Enrichment And Recovery Of Precious Metals

     

A process for the selective leaching, enrichment and recovery of precious metals from waste precious metal plated materials is provided. This process adopts a leaching reagent consisting of a precious metal chelating agent, a metal complexing agent, an oxidant, a pH regulator and an accelerator to selectively leach the precious metal coatings from the feedstock. The leached precious metals are then enriched and recovered via electrowinning, while the post-electrowinning solution is recycled for formulating the leaching reagent.

The process improves the production efficiency and actual recovery rate of precious metals, and features mild reaction conditions and low environmental pollution throughout the whole operation.

Also provided is a leaching reagent for the selective leaching, enrichment and recovery of precious metals from waste precious metal plated materials.

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