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U.S. Department of Energy
Office of Scientific and Technical Information

Filtration of solvent-water extracted tar sand

Patent ·
OSTI ID:6815643
Recovery of tar from tar sands is accomplished by employing a solvent extraction process in which tar sand is slurried in a hydrocarbon solvent with sufficient water added to the slurry to form a grainy slurry, the water being from about 1% to about 7% by wt of the tar sand. The slurry is then filtered and release of fines is controlled to maintain an easily filtered slurry. (6 claims)
Assignee:
Shell Oil Co.
Patent Number(s):
US 3459653
OSTI ID:
6815643
Country of Publication:
United States
Language:
English