Method usable in particular for washing and desorbing solid products containing hydrocarbons
US4678558A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 3, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Jul 3, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method and a device usable in particular for washing solid products contaminated by hydrocarbons. According to this method, a desorbent liquid phase is used to wash solid products which are brought into contact with this desorbent liquid phase forming a mixture consisting of solution, desorbed hydrocarbons and washed products. Said mixture, freed from gravel, undergoes at least one separation stage, this separation giving a underflow comprising at least the major part of the washed sand and an overflow from which the hydrocarbons and the aqueous phase are recovered. This method is applicable to de-oiling oil-contaminated sands and gravels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.