Process for treating liquids wastes possessing a strong acidity
US4375986A · kind A · utility
38Cited by
3References
9Claims
0Family size
Inventor
Key dates
| Filing date | Apr 8, 1981 |
| Grant date | Mar 8, 1983 |
| Priority date | — |
| Expiry date | Apr 8, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S106/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Waste material having a pH not exceeding 2, and which have previously caused a serious disposal problem, are converted into stable, solid, useful, non-polluting products by first mixing the waste material with fly ash using about 30 to 260 parts of weight of ash for 100 parts of waste material, then neutralizing the resultant mixture using lime or calcium carbonate containing materials, next adding a calcium containing binder such as lime or Portland cement, and then solidifying the resultant mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.