Selective flocculation process for the recovery of phosphate
US4690752A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Apr 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/907
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for separating and recovering non-metallic minerals, particularly phosphate, from an ore containing non-uniform sized particles, including colloidal particles. The ore is slurried in an alkaline, aqueous solution with a dispersing agent. A flotation collector is added, and the mixture is contacted with a hydrophobic, high molecular weight, nonionic polymer to flocculate the fine particles and make them amenable to subsequent flotation. A second embodiment provides a process for the recovery of an upgraded non-metallic ore from ore slimes, such as phosphate slimes, utilizing a high molecular weight, polyacrylamide, anionic flocculating agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.