Fuel separation process

Details Fuel separation process Fuel separation process

1976-05-05

1978-06-20

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 1C, 201 17, C10L 910, C10B 5700

Patent

active

040959554

ABSTRACT:
Fine particles of a solid carbonaceous fuel of the coal or coke type are treated to reduce their content of undesired constituents at least including sulfur or ash or both. The treatment comprises forming a mixture of the fuel particles with a liquid aqueous leaching solution, containing one or more cations selected from Groups IA and IIA of the periodic table, which is effective to dissolve the undesired constituents. The mixture is exposed to temperatures in the range of about 150.degree. to 375.degree. C under a pressure of at least the autogeneous steam pressure until the solution has dissolved the undesired constituents of the fuel to such an extent that the undesired constituent content of the fuel particles has been reduced to less than a desired limit. The major portion of the solution is then separated from the fuel particles under temperature and pressure conditions and within a time period such that the amount of the undesired constituents dissolved in the solution is not substantially reduced by precipitation, adsorption on the fuel particles, or chemical recombination therewith. The separation is typically carried out by filtering the solution to remove the solid fuel particles. The temperature of the mixture is typically maintained in the range of about 100.degree. to 375.degree. C during the separation step, desirably at about the same temperature and pressure as those used during the dissolving step.

REFERENCES:
patent: 618104 (1899-01-01), Kenevel
patent: 3393978 (1968-07-01), Murphy et al.
patent: 3928024 (1975-12-01), Mueller et al.

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