Closed loop solvent extraction process for oil sands
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United States of America Patent
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Jul 8, 2014
Grant Date -
Jun 2, 2011
app pub date -
Sep 21, 2010
filing date -
Sep 23, 2009
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Abstract
The present invention is directed to a method comprising contacting an oil sand with a suitable solvent to generate a solvated oil sand slurry; separating solvent-diluted bitumen from the solvated oil sand slurry to generate (a) a solvent-diluted bitumen and (b) a slurry with increased solids concentration; and filtering the slurry with increased solids concentration. The method of the present invention may be used to produce a low ash bitumen product and dry tailings from oil sands.
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