Separation of rock solids from heat carriers in an oil shale ret

Details Separation of rock solids from heat carriers in an oil shale ret Separation of rock solids from heat carriers in an oil shale ret

1977-12-02

1979-05-01

Levine, Herbert

Mineral oils: processes and products

Products and compositions

Lubricating oils

209474, C10G 102, C10B 5306

Patent

active

041522451

ABSTRACT:
In an oil shale retorting process, hot heat-carrying solids are cycled to a retort zone to mix with and retort crushed oil shale, thereby producing gas, oil products, and a mixture of heat-carrier solids and spent shale solids. The spent shale solids contain some rock solids which have a heavier particle weight than the heat-carrier solids. The heat-carrier solids are separated and recovered from the spent shale for recycle through the process. In one stage of the separation procedure, a mixture of heat-carrier solids and rock solids is fed to a gas fluidized bed classifier which is constructed and operated in a way such that rock solids are preferentially separated from the heat-carrier solids. The separation stage is especially suited to spherically-shaped heat-carrier solids in a size range between about 0.14 centimeters (0.055 inch) and 1.27 centimeters (0.5 inch) and having a surface area of between 10 and 150 square meters per gram.

REFERENCES:
patent: 2561396 (1951-07-01), Matheson
patent: 2586818 (1952-02-01), Harms
patent: 2864763 (1958-12-01), Schulman et al.
patent: 3774759 (1973-11-01), Weintraub et al.
patent: 3803021 (1974-04-01), Rahman

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