Silver recovery as Ag0nanoparticles from ion-exchange regenerant solution
US10807085B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Nov 16, 2018 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Apr 20, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Silver is recovered as Ag0 nanoparticles from the spent solution obtained from the regeneration of an Ag-loaded ion exchange resin using electrolysis. The reclaimed regenerant solution is recycled and reused in a closed-loop scheme over multiple cycles. The recovered Ag0 nanoparticles are monodisperse, spherical in shape, and have a mean diameter of about 6 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.