Method usable in particular for washing and desorbing solid products containing hydrocarbons

摘要

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.