Process for cleaning debris containing pollutants
AssigneeRuhrkohle Oel und Gas GmbH
InventorsHerbert Dybus, Otto Funk
Life of this patent
Estimating the term…
Abstract
Process for the cleaning of debris containing water and contaminated with pollutants using solvents, including the steps of: addition of the solvent to the material to be treated, followed by thorough mixing; separation of the liquid phase containing the pollutants; stripping of the remaining solvent from the residue; and recovery of the solvent obtained in the last two steps.
Claims20
A treatment process for the decontamination of a contaminated material, the contaminated material being contaminated with a pollutant, and the contaminated material also containing water, said treatment process comprising the steps of:
- adding a liquid to the contaminated material, the liquid consisting of a water immiscible solvent for dissolving the pollutant, the pollutant being soluble in the solvent;
- mixing said added solvent with the contaminated material to produce a mixture of a liquid phase and a solid phase, the liquid phase containing solvent, water and a substantial portion of the pollutant;
- separating a portion of said liquid phase containing the substantial portion of the pollutant from said solid phase to thereby produce a separated solid residue and a first recovered portion of said liquid phase, said separated solid residue still containing a residual amount of said liquid phase;
- and
- subjecting said separated solid residue still containing a residual amount of said liquid phase to a further recovery treatment to thereby recover a substantial portion of said residual amount of said liquid phase as a second recovered portion of said liquid phase, said solid residue remaining after said further treatment comprising an environmentally safely disposable solid portion.
A process for decontaminating a material containing water and contaminated with an organic pollutant, said treatment process comprising the steps of:
- adding a liquid to the contaminated material, the liquid consisting of an organic solvent for dissolving the organic pollutant, the organic pollutant being soluble in the organic solvent;
- mixing said organic solvent with the contaminated material to produce a mixture of a liquid phase and a solid phase, said liquid phase containing at least the organic solvent and a substantial portion of the pollutant;
- separating at least a portion of said liquid phase from said solid phase to thereby produce a separated solid residue and a first recovered portion of said liquid phase, said separated solid portion containing a residual amount of said liquid phase;
- and
- subjecting said separated solid residue containing a residual amount of said liquid phase to a further recovery treatment to thereby recover a substantial portion of said residual amount of said liquid phase as a second recovered portion of said liquid phase, said solid residue remaining after said further treatment comprising an environmentally safely disposable solid portion.
Dependencies are inferred from the claim text.