Low-temperature oil shale and tar sand extraction process. [use of residue as agricultural substrate]

Patent · Tue Dec 19 04:00:00 EST 1978

OSTI ID:6538798

Anthony, M L

Fertilizers and kerogen materials are extracted from crushed oil shale utilizing a low temperature dekerosing (kerogen removal) solvent phase followed by a second fertilizer extraction phase using water as solvent. Process control factors are effective in producing delamination of the crushed oil shale resulting in high yield of kerogen and fertilizer values. The dross shale residue is not disintegrated and constitutes an ecologically acceptable soil conditioner and land restoration residuum. Proper blending of the various extracts and residues results in a wide variety of commercial fertilizer products. Bitumens and fertilizer materials may also be extracted from tar sands of both the hard, stony and soft variety; and again a non-petroleum solvent, low temperature extraction process is used in a first step to recover the bitumen fraction. The solvent is totally recovered and recycled. Thermal energies are also recycled resulting in high overall efficiency. The sand residuum of dross is clean and uncontaminated, constituting a water wettable land restoration medium with plant nutrient value imparting arable character. A second step may be employed to selectively leach fertilizers, notatably phosphates and potash. Leaching is accomplished by the use of water, which is recovered and recycled.

• Assignee: Shoilco, Inc.
• Patent Number(s): US 4130474
• OSTI ID: 6538798
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402* -- Oil Shales & Tar Sands-- Surface Methods
BITUMENS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
COMMINUTION
CRUSHING
DISSOLUTION
ENERGY SOURCES
EXTRACTION
FERTILIZERS
FOSSIL FUELS
FUELS
KEROGEN
LEACHING
METAMORPHIC ROCKS
OIL SANDS
OIL SHALES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
RETORTING
ROCKS
SEPARATION PROCESSES
SHALES
SOLVENT EXTRACTION
SPENT SHALES
TAR
WASTE PRODUCT UTILIZATION