Hydrophobic polyelectrolyte coagulants for concentrating coal tailings
US5330546A · kind A · utility
12Cited by
10References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Aug 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for concentrating coal tailings which comprises steps of: feeding the coal tailings to a thickener; treating the coal tailings with a hydrophobic polyelectrolyte copolymer coagulant which comprises diallyldimethylammonium chloride and a more hydrophobic monomer, the coagulant is added to the coal tailings in an amount between about 0.05 to about 0.25 lb/ton; treating the coal tailings with a flocculant in an amount between about 0.05 to about 0.25 lb/ton; discharging substantially concentrated tailing; and withdrawing substantially clarified liquid from the thickener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.