WO2026139776 - A METHOD FOR SELECTIVE SEPARATION OF PRECIOUS METALS FROM E-WASTE AND SPENT NICKEL CATALYSTS
National phase entry is expected:
Publication Number
WO/2026/139776
Publication Date
02.07.2026
International Application No.
PCT/IB2025/062855
International Filing Date
15.12.2025
Title **
[English]
A METHOD FOR SELECTIVE SEPARATION OF PRECIOUS METALS FROM E-WASTE AND SPENT NICKEL CATALYSTS
[French]
PROCÉDÉ DE SÉPARATION SÉLECTIVE DE MÉTAUX PRÉCIEUX À PARTIR DE DÉCHETS ÉLECTRONIQUES ET DE CATALYSEURS AU NICKEL USAGÉS
Applicants **
NEO-SEEKERMETALS PRIVATE LIMITED
Inventors
SHAIK, Saida
Priority Data
202441101940
23.12.2024
IN
Application details
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International Searching Authority |
IP India
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2020 | |
| EPO | Filing, Examination, Granting | 11708 | |
| Japan | Filing, Examination, Granting | 2129 | |
| South Korea | Filing, Examination, Granting | 1961 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
22,558
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Abstract[English]
The present invention discloses methods for the selective recovery of precious metals from electronic waste (e-waste). An environmentally friendly oxidizing agent is developed for the selective oxidation and separation of copper from printed circuit board (PCB) metal powder. Additionally, selective recovery of gold and silver is achieved using fluxing agents. Following selective leaching, copper is recovered from the leach solution through cementation with more active metal species. Impurities, such as aluminum (Al) and iron (Fe), are subsequently removed via pH precipitation. The remaining leached elements are further separated using crystallization or additional pH precipitation processes.[French]
La présente invention concerne des procédés de récupération sélective de métaux précieux à partir de déchets électroniques. Un agent oxydant respectueux de l'environnement est développé pour l'oxydation et la séparation sélectives du cuivre à partir de poudre métallique de cartes de circuit imprimé (PCB). De plus, une récupération sélective de l'or et de l'argent est réalisée à l'aide d'agents de fluxage. Après la lixiviation sélective, le cuivre est récupéré à partir de la solution de lixiviation par cimentation des espèces métalliques plus actives. Des impuretés, telles que de l'aluminium (Al) et du fer (Fe), sont ensuite éliminées par précipitation au pH. Les éléments lixiviés restants sont ensuite séparés à l'aide de procédés de cristallisation ou de précipitation au pH supplémentaires.