Method of making shaped bodies for use in the construction trades from power-plant clarifier sludge
US4925614A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1988 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jul 15, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S52/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A power-plant clarifier sludge having the following dry composition: ______________________________________ SiO.sub.2 2 to 30 weight percent, Fe.sub.2 O.sub.3 2 to 20 weight percent, Al.sub.2 O.sub.3 0.5 to 5 weight percent, CaO 15 to 50 weight percent, MgO 1 to 8 weight percent, MnO 0.01 to 0.5 weight percent, Na.sub.2 O 0.1 to 0.5 weight percent, K.sub.2 O 0.1 to 1 weight percent, SO.sub.3 in sulfate 0.1 to 2 weight percent, and CO.sub.2 in carbonate 5 to 40 weight percent; ______________________________________ is used in the desulfurization of power-plant flue gas and the desulfurization slurry is dewatered and pressed into construction blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.