Coal-deashing process

Details Coal-deashing process Coal-deashing process

1983-02-16

1984-03-20

Gantz, Delbert E.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 15R, 44 51, C10L 504, C10L 1006

Patent

active

044378610

ABSTRACT:
Natural coal containing inorganic impurities may be deashed by the selective flocculation process using a novel flocculant which is a water-soluble or water-dispersible copolymer having a molecular weight from about 100,000 to about 30,000,000 comprising a hydrophilic monomeric unit having a solubility in water greater than 15% by weight at 20.degree. C. and a hydrophobic monomeric unit having a solubility in water less than 10% by weight at 20.degree. C. in proportions of 99:1 to 20:80% by weight.

REFERENCES:
patent: 2780538 (1957-02-01), Chilton
patent: 2894851 (1959-07-01), Booth et al.
patent: 4304573 (1981-12-01), Burgess et al.

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