Mineral oils: processes and products – Tar sand treatment with liquid
Reexamination Certificate
2005-10-25
2010-06-01
Griffin, Walter D (Department: 1797)
Mineral oils: processes and products
Tar sand treatment with liquid
C208S391000, C209S164000, C209S171000
Reexamination Certificate
active
07727384
ABSTRACT:
A bitumen recovery process is provided which includes the step of providing a bitumen froth or a component derived from the bitumen froth as a feed material, wherein the bitumen froth is produced in a primary separation process from a slurry comprising oil sand and water. Further, the process includes the step of subjecting the feed material to froth flotation in a column flotation cell in order to recover a bitumen product from the feed material. Preferably, the froth flotation cell includes an underwash zone, wherein a bitumen-rich fraction of the feed material is passed through the underwash zone as the bitumen-rich fraction rises within the column flotation cell.
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Bitmin Resources Inc.
Griffin Walter D
Kuharchuk Terrence N.
Robinson Renee
Rodman & Rodman
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