Process for the insolubilization and aggregation of smoke purification waste materials
US5252127A · kind A · utility
15Cited by
12References
24Claims
0Family size
Inventor
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S106/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Smoke purification waste materials (SPW), rich in lime, are mixed with a product containing at least 60% silica and/or aluminum to bring the pH to a value of between 7 and 11.5 and with a quantity of water of between 15% and 160% of the weight of the waste materials and said product. In practice, the ratio of SiO.sub.2 and Al.sub.2 O.sub.3 over CaO must be at least equal to 0.8. Solid compounds are obtained that are virtually insoluble in water and that are non-pollutant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.