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Title: 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.
Inventors:
;
Issue Date:
OSTI Identifier:
201516
Assignee:
Lockheed Idaho Technologies Co., Idaho Falls, ID (United States) PTO; SCA: 540220; PA: EDB-96:055735; SN: 96001551793
Patent Number(s):
US 5,490,531/A/
Application Number:
PAN: 8-442,031
Contract Number:
AC07-94ID13223
Resource Relation:
Other Information: PBD: 13 Feb 1996
Research Org:
Lockheed Martin Idaho Tech Co
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; HYDROCARBONS; SOLVENT EXTRACTION; SOLIDS; CLEANING; TERPENES; ORGANIC SOLVENTS; RECYCLING; WASTE OILS; REMEDIAL ACTION