Apparatus for removing hydrocarbon contaminants from solid materials
A system is described for removing hydrocarbons from solid materials. Contaminated solids are combined with a solvent (preferably terpene based) to produce a mixture. The mixture is washed with water to generate a purified solid product (which is removed from the system) and a drainage product. The drainage product is separated into a first fraction (consisting mostly of contaminated solvent) and a second fraction (containing solids and water). The first fraction is separated into a third fraction (consisting mostly of contaminated solvent) and a fourth fraction (containing residual solids and water). The fourth fraction is combined with the second fraction to produce a sludge which is separated into a fifth fraction (containing water which is ultimately reused) and a sixth fraction (containing solids). The third fraction is then separated into a seventh fraction (consisting of recovered solvent which is ultimately reused) and an eighth fraction (containing hydrocarbon waste). 4 figs.
- Research Organization:
- Lockheed Martin Idaho Tech Co
- DOE Contract Number:
- AC07-94ID13223
- Assignee:
- Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)
- Patent Number(s):
- US 5,490,531/A/
- Application Number:
- PAN: 8-442,031
- OSTI ID:
- 201516
- Country of Publication:
- United States
- Language:
- English
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Method for removing hydrocarbon contaminants from solid materials
Method for removing hydrocarbon contaminants from solid materials