Mineral oils: processes and products – Phenolic or toxic oils
Patent
1975-05-20
1977-07-19
Gantz, Delbert E.
Mineral oils: processes and products
Phenolic or toxic oils
C10G 104
Patent
active
040367304
ABSTRACT:
A process is provided for the production of solvent refined coal, which comprises heating the coal while slurried in a solvent under hydrogenation conditions to substantially liquefy the coal followed by a step of separating the non-dissolved solids from the solution, e.g. by filtration, improved by the feature that a small percentage of the liquefiable matter of the coal is combined or recombined chemically with itself and/or existing insoluble matter so as to form larger particles which, e.g. acting as a filtering aid, assist in the separation of the solids from the liquid. These larger particles may be formed by hydrogen starvation during the heating of the slurry to the coal liquefying temperature or by controlled localized overheating prior to the liquefication step or by reducing the hydrogen partial pressure during the liquefication step to a value somewhat below a predetermined value for maximum extraction or by a posttreatment of the liquid product of the liquefication step at a temperature higher than the coal liquefication step. Two or more of these possibilities may be employed in combination.
REFERENCES:
patent: 1864496 (1932-06-01), Pier et al.
patent: 2476999 (1949-07-01), Orchin
patent: 2832724 (1958-04-01), Doughty et al.
patent: 2913388 (1959-11-01), Howell et al.
patent: 3341447 (1967-09-01), Bull et al.
patent: 3503864 (1970-03-01), Nelson
patent: 3645885 (1972-02-01), Harris et al.
patent: 3663420 (1972-05-01), Jacobs et al.
patent: 3692662 (1972-09-01), Wilson et al.
patent: 3884795 (1975-05-01), Wright et al.
Beukes Quintin John
Brink Andries
Kleynjan Cornelis
Gantz Delbert E.
Hellwege James W.
South African Coal, Oil & Gas Corporation Limited
Wiviott Fred
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