Method to control acid rock drainage
US8586817B2 · kind B2 · utility
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5References
10Claims
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Key dates
| Filing date | Jan 15, 2013 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Jan 15, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition to control acid rock drainage is provided. The composition includes a slurry made from water and solids, the solids containing powders of limestone, clay and magnesium oxide or magnesium hydroxide. In some instances, the slurry is thixotropic and contains between 10 to 75 weight percent of solid powders. The solid powders can include between 40 to 75 weight percent limestone, 10 to 35 weight percent clay and 10 to 30 weight percent magnesium oxide or a proportional concentration of magnesium hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.