Method for treatment of solid waste to minimize heavy metals
US5674176A · kind A · utility
9Cited by
37References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Oct 7, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S588/901
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention relates to the treatment of contaminated materials including soils and solids, and in particular to chemical treatment of waste or solids containing high levels of heavy metals such as lead, by treating the waste or solid with an additive from the group consisting of phosphoric acid, monocalcium phosphate monammonium phosphate and diammonium phosphate either alone or in combination with Portland cement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.