Separation of particles of different surface energies through control of humidity
US11806657B2 · kind B2 · utility
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Key dates
| Filing date | Sep 3, 2021 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Sep 3, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2202/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An impact test apparatus can be used to determine particle interfacial energies with varying relative air humidity. It was observed that capillary condensation increased the adhesive forces of hydrophilic materials. A systems humidity separation window was identified and the differences in interfacial energy for a hydrophilic surface and for a hydrophobic surface can be exploited in order to achieve the separation of particles. Separation and concentration of particles, particularly particles within a mineral ore body, can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.