Methods for extracting bitumen from bituminous material

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United States of America Patent

PATENT NO 8877044
SERIAL NO

12956701

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
CANADIAN NATURAL UPGRADING LIMITED100 855 2 STREET SW CALGARY ALBERTA T2P 4J8 CANADA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Duyvesteyn, Willem P C Reno, US 62 1088
Hoffman, Cherish M Reno, US 9 57
Joshi, Mahendra Katy, US 33 130
Kift, Julian Reno, US 22 216
Thompson, Whip C Reno, US 10 64
Zelnik, Dominic J Sparks, US 8 38

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