METHODS FOR EXTRACTING BITUMEN FROM BITUMINOUS MATERIAL
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United States of America Patent
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Issued Date -
Jul 28, 2011
app pub date -
Jan 22, 2010
filing date -
Jan 22, 2010
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Abandoned
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Abstract
Methods for preparing solvent-dry, stackable tailings. The method can include the steps of adding a first quantity of first 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 first solvent-wet tailings, adding a quantity of second solvent to first solvent-wet tailings to separate a first quantity of first solvent component from the first solvent-wet tailings and thereby producing second solvent-wet tailings, and adding a quantity of water to the second solvent-wet tailings to separate a first quantity of second solvent component from the second solvent-wet tailings and thereby forming solvent-dry, stackable tailings.
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