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Method for treating shale

Patent ·
OSTI ID:6379536
;
A method is described for treating oil shale containing kerogen to produce a kerogen concentrate of reduced ash content. The method comprises: treating raw oil shale with an aqueous caustic solution having a caustic concentration sufficient to substantially transform potentially extractable minerals present in the shale into acid extractable form, without substantial extraction of non-silicaceous minerals into the caustic treating solution to produce a shale product of substantially transformed mineral content; separating the shale product; treating the separated shale product by contacting it with an aqueous acid solution to produce a kerogen concentrate of reduced ash content; and converting the kerogen concentrate of reduced ash content to hydrocarbon compounds by retorting.
Assignee:
Standard Oil Co., (Indiana), Chicago, IL
Patent Number(s):
US 4668380
OSTI ID:
6379536
Country of Publication:
United States
Language:
English

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Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
AQUEOUS SOLUTIONS
ASH CONTENT
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
DISSOLUTION
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROCARBONS
KEROGEN
MATERIALS
MIXTURES
OIL SHALES
ORGANIC COMPOUNDS
ORGANIC MATTER
PH VALUE
QUANTITY RATIO
RETORTING
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
YIELDS