Hydrometallurgical process using multi-stage nanofiltration
US10174404B2 · kind B2 · utility
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Key dates
| Filing date | Aug 14, 2013 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | May 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Nanofiltration can be used to improve a hydrometallurgical process in which valuable metal is extracted from ore or tailings by leaching with a suitable lixiviant. The process requires at least two nanofiltration subsystems in which raffinate from a solvent extraction process is treated in a nanofiltration subsystem, after which permeate therefrom is combined with a pregnant solution stream and is treated in a second nanofiltration subsystem. This arrangement can lead to advantages in the amount of lixiviant recovered, in the raw materials required, in the effluent produced, in the size of plant, and in overall cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.