Coagulant for mineral refuse slurries
US5653886A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/56
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention related to the use of certain cross-linked diallyldimethyl ammonium chloride polymers in water-in-oil emulsion form for use as coagulants in suspensions of inorganic solids. The diallyldimethyl ammonium chloride polymers are preferably polymers of diallyldimethyl ammonium chloride, acrylamide, and triallylamine. The water-in-oil emulsions are formulated to invert after addition to the inorganic solids suspension, as the suspension travels to a mechanical thickening device for further processing. The inorganic solids from refuse or concentrate mineral processing applications may be coal, copper ore, sand, gravel, taconite, beryllium, trona, kaolin or precious metals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.