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

Recovery of bitumen from tar sands

Patent ·
OSTI ID:5498934
Bitumen is separated from tar sands by contacting the tar sands with a small amount of liquid, heating the liquid treated tar sands to expand the liquid as a vapor thereby reducing the density of the bitumen and separating the bitumen from the remainder of the tar sands on the basis of density.
Assignee:
Standard Oil Co.
Patent Number(s):
US 4174263
OSTI ID:
5498934
Country of Publication:
United States
Language:
English