Apparatus for two phase vacuum extraction of soil contaminants
US5197541A · kind A · utility
32Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 15, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/005
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for two phase vacuum extraction of contaminants from the ground involves vacuum withdrawal of liquid and gaseous phases as a common stream, separation of the liquid and gaseous phases, and subsequent treatment of the separated liquid and gases to produce clean effluents. Two phase vacuum extraction employs a single vacuum generating device to remove contaminants in both the liquid stream and soil gases through a single well casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.