Oil shale retorting

Details Oil shale retorting Oil shale retorting

1976-06-10

1977-08-23

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 102

Patent

active

040438970

ABSTRACT:
An improved process for educing shale oil having a low arsenic content and for producing hydrogen from oil shale in high yields comprises passing the oil shale upwardly through a gas-heated pyrolysis zone to educe oil therefrom, and then passing the spent, coke-laden shale downwardly through a gasification-combustion zone to produce hydrogen-rich heating gas and/or substantially pure hydrogen for use in catalytic refining of the educed shale oil. Air or oxygen is introduced to the gasification-combustion zone to burn part of the residual coke, thereby heating the spent shale up to gasification temperatures. Steam is injected concurrently with the oxidizing gas in order to gasify unburned coke via the water gas reaction. Improved hydrogen yields and purity and more effective shale retorting are achieved by recycling hot product gas for eduction into admixture with the gasifier product between the gasification and pyrolysis zones, and eliminating recycle to the gasification-combustion zone.

REFERENCES:
patent: 3106521 (1963-10-01), Huntington
patent: 3361644 (1968-01-01), Deering
patent: 3475319 (1969-10-01), MacLaren
patent: 3736247 (1973-05-01), Jones et al.
patent: 3841992 (1974-10-01), Jones et al.

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