METHOD AND APPARATUS FOR EXTRACTING BITUMEN FROM AN OIL SAND STREAM
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United States of America Patent
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Issued Date -
Aug 21, 2014
app pub date -
Feb 13, 2014
filing date -
Feb 18, 2013
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Abandoned
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Abstract
The present invention provides a method for extracting bitumen from an oil sand stream, the method including the steps of: (a) providing an oil sand stream; (b) contacting the oil sand stream with a solvent thereby obtaining a first solvent-diluted oil sand slurry; (c) screening the first solvent-diluted oil sand slurry, thereby obtaining a first oversized material and a first undersized material; (d) contacting the first oversized material with a solvent thereby obtaining a second solvent-diluted oil sand slurry; (e) screening the second solvent-diluted oil sand slurry, thereby obtaining a second oversized material and a second undersized material; (f) optionally filtering the first undersized material obtained in step (c), thereby obtaining a solids-depleted stream and a solids-enriched stream; (g) optionally removing solvent from the solids-depleted stream obtained in step (f) thereby obtaining a bitumen-enriched stream.
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