Process for the production of distillate fuels from oil shales a

Details Process for the production of distillate fuels from oil shales a Process for the production of distillate fuels from oil shales a

1977-10-31

1979-07-17

Levine, Herbert

Mineral oils: processes and products

Products and compositions

Lubricating oils

202114, 202120, 202124, C10G 102

Patent

active

041614410

ABSTRACT:
A continuous process for removing a substantial amount of the water present in oil shale prior to retorting the same to facillitate the rate of recovery of the oil therefrom in the retorting step of the process and to substantially increase the capacity of the latter step in the process and improve the overall efficiency thereof; which comprises subjecting the said oil shale in subdivided form to indirect heat treatment with hot combustion gases in a partial dehydration step under relatively milder temperature conditions than that of the retort, collecting the vapors and gases from the partial dehydration step, in the temperature range from the prevailing temperature up to about 550.degree. F. to about 650.degree. F., and for a sufficient time to remove substantial to major amounts of free and combined water from the oil shale accompanied by considerable amounts of oil distillate and thereafter passing the heated partially dehydrated oil shale to the retorting step for further indirect heat treatment in the approximate range of about 850.degree. F. to about 1000.degree. F., fractionating the vapors from the retorting step wherein there is removed a light overhead product comprising vapors of low boiling hydrocarbons, water, hydrocarbon gases and ammonia and wherein the heavier conversion oil products from the oil shale are condensed and separated is a liquid for further treatment and use.

REFERENCES:
patent: 3691056 (1972-09-01), Barney et al.
patent: 3925190 (1975-12-01), Whitcombe et al.
patent: 3954597 (1976-05-01), Morrell

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