Method for removal of last traces of soluble ash and elements fr

Details Method for removal of last traces of soluble ash and elements fr Method for removal of last traces of soluble ash and elements fr

1976-06-14

1978-06-20

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

C10L 910

Patent

active

040959546

ABSTRACT:
Solvent refined coal is treated with liquid water at a temperature of about 500.degree.-550.degree. F in a closed cylindrical vessel under the saturation pressure 665-1030 psig of water at that temperature and under gentle agitation to insure low shear liquid-solid contact for about 1/2 to 2 hours.
Surprisingly, the soluble ash, generally sodium or potassium salts, is leached out to bring the sodium content down from 50-60 parts per million to a value of less than 1 part per million which makes the product very suitable as a feed for direct firing in a gas turbine.
In addition the total ash content is reduced from a value of approximately 0.1% to a value less than 0.05% which means that in addition to reducing the quantity of sodium and potassium, there are other constituents of the ash which also have been removed.

REFERENCES:
patent: 1420164 (1922-06-01), Trent
patent: 2761824 (1956-09-01), Eastman et al.
patent: 4021328 (1977-05-01), Wolk

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