Process for the decontamination of soils, sediments, and sludges
US5149444A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1990 |
| Grant date | Sep 22, 1992 |
| Priority date | — |
| Expiry date | Jul 3, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/925
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for the decontamination of a soil, sediment, or sludge containing toxic halogenated organic compound and containing water comprising the steps of mixing said soil, sediment, or sludge with a reagent capable of reacting with said halogenated compound and heating said mixture of soil, sediment, or sludge, and reagent in a reaction zone to an elevated temperature thereby forming a reaction zone vapor stream containing at least a portion of the water contained in said soil, sediment, or sludge and unreacted halogenated organic compound; condensing a portion of said reaction zone vapor stream under conditions suitable for the formation of a condensate stream containing substantially all of the halogenated organic compound in said reaction zone vapor stream, and a vapor stream containing water and trace amounts of said halogenated organic compound; recycling said condensate to said reaction zone; treating said vapor stream to remove trace halogenated organic compound and venting the so-treated stream to the atmosphere; and removing soil, sediment, or sludge containing less contaminant from said reaction zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.