Liquefaction of calcium-containing subbituminous coals and coals

Details Liquefaction of calcium-containing subbituminous coals and coals Liquefaction of calcium-containing subbituminous coals and coals

1977-11-21

1979-07-17

Dees, Carl

Mineral oils: processes and products

Phenolic or toxic oils

208 10, 44 1R, 44 6, C10G 100, C10G 106

Patent

active

041614402

ABSTRACT:
An improved process for the treatment of a calcium-containing subbituminous coal and coals of lower rank to form insoluble, thermally stable calcium salts which remain within the solids portions of the residue on liquefaction of the coal, thereby suppressing the formation of scale, made up largely of calcium carbonate which normally forms within the coal liquefaction reactor (i.e., coal liquefaction zone), e.g., on reactor surfaces, lines, auxiliary equipment and the like. An oxide of sulfur, in liquid phase, is contacted with a coal feed sufficient to impregnate the pores of the coal. The impregnated coal, in particulate form, can thereafter be liquefied in a coal liquefaction reactor (reaction zone) at coal liquefaction conditions without significant formation of scale.

REFERENCES:
patent: 1436289 (1922-11-01), Plauson
patent: 2191156 (1940-02-01), Pier et al.
patent: 2221410 (1940-11-01), Pier

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