Mineral oils: processes and products – By treatment of solid mineral – e.g. – coal liquefaction – etc. – Specified agitation or circulation in gas contact zone
Patent
1985-07-15
1986-05-06
Doll, John
Mineral oils: processes and products
By treatment of solid mineral, e.g., coal liquefaction, etc.
Specified agitation or circulation in gas contact zone
208426, 208427, 208417, 208418, C10G 102, C10G 104
Patent
active
045870063
ABSTRACT:
A continuous process for recovering shale oil from raw oil shale using a new integrated hydropyrolysis/thermal pyrolysis technique which produces high yields of improved quality liquid hydrocarbon products and has unusually low heat and energy requirements, which process comprises crushing and grinding raw oil shale, mixing the ore particles with hot recycle heavy oil to form a slurry, treating the slurry with hydrogen under elevated temperature and pressure for a short period, stripping out the desired liquid hydrocarbon products, passing the remaining slurry mixture to a thermal retort where under fluidized bed conditions it is subjected to increased temperatures by adding spent shale that has been burned in an air lift combustor at two different temperature level treatment zones, the upper zone being selected such that the temperature is sufficient to vaporize the remaining slurry oil, and the lower zone being selected such that the temperature is sufficient to retort spent shale and to thermally crack excess heavy gas oil charged to the lower zone, taking product as high temperature vapor to a quench tower where the liquid product is recycled to the hydropyrolysis reactor and the heavy gas oil is recycled to the slurry mixer.
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Breckinridge Minerals, Inc.
Caldarola Glenn A.
Doll John
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