Mineral oils: processes and products – Tar sand treatment with liquid – Inorganic liquid
Patent
1991-08-22
1994-03-01
Breneman, R. Bruce
Mineral oils: processes and products
Tar sand treatment with liquid
Inorganic liquid
422259, 422271, 422272, C10G 104
Patent
active
052904334
ABSTRACT:
The washer comprises an open-topped vessel having a tube mounted vertically and centrally therein. Post-primary bitumen froth is fed to the upper end of the tube. Pairs of down throw and up throw propellers mounted to rotate in the tube act to shear the froth as it passes down through the tube. At its lower end, the tube is closed off by a transverse wall. Slots are formed in the tube side wall to provide an exit. The sheared mixture thus changes direction as it leaves the tube. In the vessel chamber, solids and water sink downwardly and are removed as tailings through a bottom outlet. The sheared aerated bitumen rises and forms a new forth that is recovered in a launder. Middlings are withdrawn from the chamber and recycled to join the feed. The product froth is reduced in water and solids relative to the feed froth.
REFERENCES:
patent: 3784464 (1974-01-01), Kaminsky
patent: 4255410 (1981-03-01), Spevack
patent: 4343691 (1982-08-01), Minkkinen
Chan Edward Wing-Kee
Stovall Robert B.
Alberta Energy Company Ltd.
Breneman R. Bruce
Canadian Occidental Petroleum Ltd.
Esso Resources Canada Limited
Gulf Canada Resources Limited
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