C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/30
C10G 1/02 (2006.01)
Patent
CA 1117056
METHOD AND APPARATUS FOR PROCESSING OIL SHALE ABSTRACT OF THE DISCLOSURE A low cost, high efficiency process for treating oil shale is provided which allows essentially complete recovery of the valuable hydrocarbon fraction of the shale, including light ends, without direct firing of the shale or use of other expen- sive processing steps heretofore proposed. In preferred forms, the oil shale is heated in a closed heating system using circu- lating, oxygen-free gases until the shale "break point", or temperature at which the hydrocarbons begin to vaporize from the shale, is reached; at this point the system is slowly depres- surized and hydrocarbons are simultaneously released to a con- densation stage for the recovery thereof ant control of circu- lating fan horsepower. Steam may also be added to the circulat- ing system to further purge hydrocarbons from the shale and provide additional control of fan horsepower. Heating is prefer ably continued during the recovery-depressurization stage until the shale is at a temperature level where all hydrocarbons have been liberated therefrom. Processing in this fashion gives significant operational economies, and in production-scale runs the process generates excess energy in the form of steam and noncondensible hydrocarbon gas which can be used in the process or for other utility purposes. (Docket No. F-15503-A)
297792
Gowling Lafleur Henderson Llp
Shale Oil Science & Systems Inc.
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