Methods for obtaining bitumen from bituminous materials
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United States of America Patent
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Jan 24, 2012
Grant Date -
Feb 11, 2010
app pub date -
Oct 7, 2009
filing date -
Oct 13, 2004
priority date (Note) -
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Abstract
Methods for obtaining bitumen from bituminous material. The methods may include a dissolution step where a first solvent is added to material comprising bitumen to dissolve the bitumen contained therein. The majority of the dissolved bitumen is then removed from the mixture of first solvent and material comprising bitumen by filtering or settling the mixture of first solvent and material comprising bitumen. Any residual dissolved bitumen is then removed from the mixture of first solvent and material comprising bitumen by adding additional first solvent to the mixture to displace the residual dissolved bitumen from the mixture.
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