Process for two phase vacuum extraction of soil contaminants
US5050676A · kind A · utility
51Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1989 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Sep 27, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/121
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.