Demineralization of brown coal

Details Demineralization of brown coal Demineralization of brown coal

1974-09-23

1976-12-21

Halper, Robert

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

209 3, 209 10, 209166, 44 1C, B03B 104

Patent

active

039986047

ABSTRACT:
Demineralization of coal in which a slurry of the coal to be treated is ground in the presence of aqueous acid such as HCl H.sub.2 SO.sub.4 and H.sub.2 CO.sub.3 and then the slurry is subjected to froth flotation in the presence of a gas selected from Cl.sub.2, SO.sub.2, or CO.sub.2.

REFERENCES:
patent: 793808 (1905-07-01), Sulman
patent: 1552197 (1925-09-01), Bates
patent: 1788331 (1931-01-01), Schafer
patent: 2142207 (1939-01-01), Price
patent: 2346151 (1944-04-01), Burk
patent: 3501272 (1970-03-01), Benyk
Chem. Abst. 78, 1973, 161905z.
Gaudin, Flotation, McGraw-Hill, 1957, p. 543.

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