Acid mine drainage treatment
US10875796B2 · kind B2 · utility
0Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2018 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Oct 9, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2305/14
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention is directed to methods of neutralizing acid drainage from particulate mining waste, comprising consolidating the particulate mining waste to form a consolidated waste solid; adding a hydrophobizing material into the consolidated waste solid, and incorporating into the consolidated waste solid a controlled release base formulation, wherein the controlled release base formulation comprises a particulate base and a controlled release system, and wherein the controlled release base formulation responds to a decrease in pH from acid drainage to release the particulate base, thereby neutralizing the acid drainage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.