Coal cleaning

Details Coal cleaning Coal cleaning

1979-08-09

1981-04-21

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

C10L 900

Patent

active

042630134

ABSTRACT:
In a coal cleaning process in which oil is used as a cleaning medium, oil remaining in the solid refuse of the cleaning process is recovered for reuse by multi-stage treatment using a volatile solvent such as liquefied petroleum gas. The oil and solvent are separated by evaporation and the gaseous solvent is liquefied for reuse. A similar process is usable for removing oil from coal to produce a dry coal.

REFERENCES:
patent: 1925005 (1933-08-01), Rose et al.
patent: 2670317 (1954-02-01), Adams
patent: 3252769 (1966-05-01), Nagelvoort
patent: 3642608 (1972-02-01), Roach et al.
patent: 3932145 (1976-01-01), Foulke
patent: 4159897 (1979-07-01), Doehlert

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