| 摘要 |
A method for separating a bitumen product from an oil sand composition that includes bitumen containing asphpaltenes, includes: contacting the oil sand composition with water to form a water and oil sand slurry; separating the slurry into a froth comprising mineral solids, water and a hydrocarbon phase, and an underflow stream comprising solids, water, and entrained hydrocarbons; contacting, at a temperature above 120 C, the froth with a paraffinic solvent so as to at least partially precipitate asphaltenes; separating the solvent-diluted froth into a hydrocarbon phase containing a majority of the solvent, a majority of the hydrocarbons from the solvent-diluted froth, and a tailings stream containing a majority of solids and a majority of the water present in the froth wherein at least some of the asphaltenes from the oil sand are not in the hydrocarbon phase; and separating the hydrocarbon phase into the bitumen product and a recyclable solvent stream.
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