Methods for the flocculation of coal fines and insoluble metals in coal mine waters
US5183575A · kind A · utility
7Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1991 |
| Grant date | Feb 2, 1993 |
| Priority date | — |
| Expiry date | Aug 29, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/5263
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Coal fines and suspended insoluble metals are flocculated from coal mine drainage waters by adding a polymeric tannin-amine compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.