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Method for removing hydrocarbon contaminants from solid materials

Patent ·
OSTI ID:870089
 [1];  [1]
  1. Idaho Falls, ID
+ Show Author Affiliations

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).

Research Organization:
EG & G IDAHO INC
DOE Contract Number:
AC07-76ID01570
Assignee:
Lockheed Idaho Technologies Company (Idaho Falls, ID)
Patent Number(s):
US 5454878
OSTI ID:
870089
Country of Publication:
United States
Language:
English

References (3)

Interfacial Tensions of Microbial Surfactants Determined by Real-Time Video Imaging of Pendant Drops conference April 1992
Surface-Active Compounds from Microorganisms book January 1980
Measurement of interfacial tension by automated video techniques conference January 1991

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Related Subjects

/134/203/210/405/
based
combined
consisting
containing
containing hydrocarbon
containing solid
containing solids
containing water
contaminants
contaminated
contaminated solids
drainage
eighth
fifth
fourth
fraction
generate
hydrocarbon
hydrocarbon contaminants
hydrocarbons
materials
method
mixture
moving hydrocarbons
preferably
preferably terpene
produce
product
purified
recovered
removed
removing
removing hydrocarbon
removing hydrocarbons
residual
residual solid
residual solids
reused
separated
seventh
sixth
sludge
solid
solid material
solid materials
solid product
solids
solvent
terpene
terpene based
third
third fraction
ultimately
washed
waste
water