Method for in situ contaminant extraction from soil
US5181796A · kind A · utility
13Cited by
5References
20Claims
0Family size
Inventor
Key dates
| Filing date | Jul 11, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Jul 11, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a method and apparatus for the in situ removal of contaminants from contaminated soil wherein exhaust gas from an internal combustion engine is injected at an elevated temperature into contaminated soil creating a sweep gas driving volatile organic chemicals out of the in situ soil. The mechanical energy from the internal combustion engine is utilized in separating the volatile organic chemicals from the sweep gas and/or increasing the flow rate of the sweep gas through the contaminated soil by either increasing the injection pressure and/or reducing the pressure on the recovery well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.