Cleaning and liquid contact with solids – Apparatus – With treating fluid purifying or separating means
Patent
1995-05-16
1996-02-13
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
With treating fluid purifying or separating means
1341044, 210787, 210781, B08B 312
Patent
active
054905311
ABSTRACT:
A system 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).
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Bala Gregory A.
Thomas Charles P.
Lockheed Idaho Technologies Company
Stinson Frankie L.
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