Solidification of organic waste materials in cement
US5269975A · kind A · utility
Inventor
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/07
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for solidifying organic waste in cement for transport and storage in solid form by mixing organic waste, water, and a cationic amine to form an emulsion, mixing the emulsion with cement to form a mixture without breaking the emulsion, casting the mixture in a form, and curing the mixture to a solidified form. In a preferred embodiment of the process, a particulate material with a negative surface charge is included in the mixture to neutralize positive charges on the cationic amine and the cement. An alcohol or glycol may be included in the emulsion to enhance the holding power and integrity of the emulsion by controlling size and uniformity of emulsion particle size. The process is applicable to organic wastes such as waste oils, halogenated solvents, non-halogenated solvents, pesticides, herbicides, liquids and sludges containing heavy metals, radioactive mixed wastes and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.