Process for rendering waste inert by cladding in a hydraulic binder and pre-mix for practicing this process
US6419738B1 · kind B1 · utility
6Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jul 31, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Waste is rendered inert, by cladding the waste in a cement base hydraulic binder including sulfoaluminate cement comprised by at least 30% by weight of the phase 3CaO.3Al2O3.CaSO4(C4A3S). The hydraulic binder can be either essentially constituted by sulfoaluminate cement, or instead comprise one or several zeolites. A pre-mix is provided for practicing the process, containing at least one zeolite and at least 15% of sulfoaluminate cement, comprised of at least 30% of the phase 3CaO.3Al2O3.CaSO4(C4A3{overscore (S)}). This pre-mix is preferably used for cladding residues of the incineration of household waste.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.