Organic bioreagent, production method, use of the bioreagent, and leaching process to recover metals

An organic bioreactive leaching solution derived from wine and silvoagropecuarian waste efficiently recovers copper and precious metals from RAEE at moderate conditions, addressing the inefficiencies and environmental concerns of existing methods.

WO2025088455A1 Publication Date: 2025-05-01SPA RES & INNOVATION ENG CENT
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Patent Information

Application Number
PCT/IB2024/060276
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-10-23
Filing Date
2024-10-18
Publication Date
2025-05-01

AI Technical Summary

Technical Problem

Current methods for recovering precious metals and copper from electrical and electronic waste (RAEE) are inefficient, often requiring high concentrations of strong acids and oxidants, high temperatures, and pressures, which are environmentally harmful and costly.

Method used

Development of an organic bioreactive leaching solution produced from waste materials from the wine and silvoagropecuarian industries, which uses low concentrations of strong oxidants or acids, moderate temperatures, and atmospheric pressure to selectively recover copper and precious metals from crushed RAEE.

Benefits of technology

The organic bioreactive solution effectively recovers copper and precious metals with high efficiency, reducing environmental impact and operational costs, while also promoting a circular economy by utilizing organic waste.

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Abstract

The present invention discloses an organic "BioReagent" or leaching solution, a process for producing said BioReagent, and the use of the organic BioReagent in leaching processes to recover precious metals and copper from waste from electrical and electronic equipment (WEEE). The organic BioReagent of the present invention is produced from waste from the wine and / or agroforestry industries. The BioReagent can also contain microorganisms which assist the oxidation of oxidising agents such as iron, thereby improving the dissolution of certain metal elements to be recovered. The organic BioReagent of the present invention allows the selective dissolution of metal elements present in solid materials that are small in size such as WEEEs, leaving other more noble metals in their solid and released form.
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