Mineral oils: processes and products – Tar sand treatment with liquid
Patent
1997-10-08
1999-12-21
Myers, Helane
Mineral oils: processes and products
Tar sand treatment with liquid
208426, 208432, 208177, 196 1452, C10G 104
Patent
active
060044551
ABSTRACT:
A sand/liquid separator provides for the conditioning of oil sands. Clean sand is separated from the ore and discharged for use as backfill. The sand/liquid separator machine includes horizontal shafts with paddles that act on a fluidized bed. The overall height of the machine is increased over prior art devices so the water volume is expanded. For a given residence time, more sand can be separated out than is otherwise possible. The water-to-sand ratio is an independent variable, water is recycled independent of the sand. The rate of water recycle depends only on the heat input needed and the clay content of the feed. The rate of water input is limited by the rise velocity needed to separate sand larger than forty-four micron from the water/liquid phase. This, in turn, determines the maximum oil sand feed rate based on the total clay in the feed at up to six percent, by weight, of clay in the middlings in the machine. This optimizes the performance of the process to cope with all the variables of heat input, ratio of oil sand feed to water, and clay content of the feed.
REFERENCES:
patent: 4424112 (1984-01-01), Rendall
patent: 4875998 (1989-10-01), Rendall
patent: 5124008 (1992-06-01), Rendall et al.
patent: 5762780 (1998-06-01), Redall et al.
patent: 5795444 (1998-08-01), Redall et al.
Canadian Patent Application 2,205,208, laid open Jul. 16, 1997 by Steven J. Lane entitled Oilsands Separation.
Canadian Patent Application 2,165,252, laid open Jul. 16, 1996, by John S. Rendall and Steven J. Lane.
Myers Helane
Schatzel Thomas E.
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