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

Process for recovery of bitumen from tar sands

Patent ·
OSTI ID:5995196
Bitumen contained in tar sands is extracted in a primary extraction step which produces a bitumen-containing froth. A hydrogen donor diluent solvent is added to the froth, and the froth-solvent mix is subjected to a desalting operation. A bitumen-solvent product from the desalting step is subjected to a coking operation. In one embodiment, a delayed coker is used, and a gas oil fraction from the coker overhead vapors in hydrogenated and used as the donor solvent in the desalting step.
Assignee:
Conoco Inc
Patent Number(s):
US 4385982
OSTI ID:
5995196
Country of Publication:
United States
Language:
English