Ferronickel alloy direct refining processes and processes for producing nickle sulfate or other nickel products
US11873539B2 · kind B2 · utility
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27Claims
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Key dates
| Filing date | Oct 31, 2022 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Oct 31, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Processes and methods for refining ferronickel alloy, and producing nickel sulfate or other nickel product, are provided, where the ferronickel alloy is treated with an oxidizing leach. The oxidizing leach may be, for example, a pressure oxidation (POX) leach or a leach with peroxide or copper (II) ions. The treatment may be in the presence of added copper, such as by providing a copper sulfate solution. Producing nickel sulfate may comprise removing copper and iron after the leach, removing impurities, and either crystallizing the nickel sulfate or precipitating/winning another nickel product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.