Mineral oils: processes and products – Products and compositions – Lubricating oils
Patent
1980-10-24
1983-02-15
Tufariello, T. M.
Mineral oils: processes and products
Products and compositions
Lubricating oils
C10G 102
Patent
active
043740170
ABSTRACT:
In processes for retorting oil shale using recycled heat carrying ceramic balls having a critical heat flux value, efficient operation, without heat shock damage to the balls, is obtained by operating at a weight ratio of balls to shale which is greater than but substantially equal to the ratio corresponding to the critical heat flux value; and this ratio is a function of both the heat transfer coefficient at the inlet to the retort and also the difference in temperature between the heat carrying balls and the oil shale. Implementing apparatus includes arrangements for controlling the ratio of heat carrying balls to shale, as by ball feed control apparatus and/or oil shale feed control apparatus, in accordance with the difference in temperature between the ceramic balls and the shale.
REFERENCES:
patent: 2872386 (1959-02-01), Aspegren
patent: 3020227 (1962-02-01), Nevens
patent: 3034979 (1962-05-01), Nevens
patent: 3265608 (1966-08-01), Crawford
patent: 3925190 (1975-12-01), Whitecombe
Tosco Corporation
Tufariello T. M.
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