Process for reducing the sulfur content of coal

Details Process for reducing the sulfur content of coal Process for reducing the sulfur content of coal

1979-08-08

1981-04-07

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

201 17, 75 6, C10L 900

Patent

active

042603943

ABSTRACT:
After pulverizing to minus 200 mesh, a mixture of coal and pyrite particles is passed through an A.C. silent corona discharge in the presence of a reactant gas. Simultaneously, the particles are de-agglomerated and an electrical or magnetic difference between them is enhanced. Thereafter, the pyrite is separated from the coal. The effectiveness of the pulverizing step in separating pyrite particles from the coal matrix, especially small-size particles approximately 50 micrometers and less, is enhanced by pretreating the coal with a chemical comminutant. One example is a solution of ammonia, used to presoak the coal for a short time, at, for example, atmospheric pressure and ambient temperature.

REFERENCES:
patent: 502431 (1893-08-01), Eames
patent: 614927 (1898-11-01), Burton
patent: 1366457 (1921-01-01), Hoopes
patent: 1731473 (1929-10-01), Naugle
patent: 4052170 (1977-10-01), Yan
patent: 4081251 (1978-03-01), Colli
patent: 4152120 (1979-05-01), Zavitsanos et al.
patent: 4155715 (1979-05-01), Sass et al.
patent: 4169710 (1979-10-01), Jensen

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