Method for chemically stabilizing waste materials containing multivalent oxyanions
US7144362B2 · kind B2 · utility
8Cited by
33References
7Claims
0Family size
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Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Dec 5, 2006 |
| Priority date | — |
| Expiry date | Oct 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of chemically stabilizing multivalent oxyanions in residue materials such as wastes from glass manufacturing facilities which method involves adding to the residue material cement, lime and aluminum sulfate to form a clay-like material having a low leachability and permeability to water. Calcium polysulfide or other sulfide bearing materials can also be added to assist in stabilizing multivalent oxyanions by adjusting the oxidation-reduction potential of the stabilized waste matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.