Methods for Extracting Bitumen From Bituminous Material
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United States of America Patent
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Jan 31, 2013
app pub date -
Jul 26, 2012
filing date -
Jul 26, 2011
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Abstract
Methods for preparing solvent-dry, stackable tailings. The method can include the steps of adding a first quantity of solvent to a bitumen material to form a first mixture, separating a first quantity of bitumen-enriched solvent from the first mixture and thereby creating solvent-wet tailings, and adding a quantity of water to the solvent-wet tailings to separate a solvent component from the solvent-wet tailings and thereby forming solvent-dry, stackable tailings. The solvent used in the methods can include paraffinic solvent, such as pentane.
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