C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/5.9
C10G 1/04 (2006.01)
Patent
CA 1049434
ABSTRACT A process is provided for the production of solvent refined coal, which comprises heating the coal whilst slurried in a solvent under hydrogenation conditions to substantially liquefy the coal followed by a step of separating the non-dissolved solids from the solu- tion, 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 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 localised 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 liqueri- cation step at a temperature higher than the coal liquefication step. Two or more of these possiblili- ties may be employed in combination.
231706
Beukes Quintin J.
Brink Andries
Kleynjan Cornelis
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