Preparation of coal substitute of low ash and sulfur

Details Preparation of coal substitute of low ash and sulfur Preparation of coal substitute of low ash and sulfur

1986-09-03

1989-05-16

Dixon, Jr., William R.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 15R, 44622, 209 5, 209 8, 241 20, C10L 132

Patent

active

048306347

ABSTRACT:
A process is taught for preparing a coal substitute of low ash level from a composite of coal, mineral matter and pyritic sulfur comprising comminuting the coal composite in an aqueous medium to a size range which promotes the liberation of the mineral matter; subjecting the resulting slurry to fines agglomeration in the presence of a water-insoluble bridging organic liquid; separating the agglomerates from the liquid phase containing the bulk of the mineral matter and a portion of the pyritic sulfur; treating the coal fines by stripping the organic liquid from the fines surface; and redispersing the fines in an aqueous medium having a surface active agent to yield a high solids coal fines slurry so to permit magnetic separation of residual pyritic sulfur and other magnetic mineral matter.

REFERENCES:
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patent: 4217109 (1980-08-01), Siwersson et al.
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patent: 4324560 (1982-04-01), Fonseca
patent: 4355999 (1982-10-01), Masologites
patent: 4408949 (1983-10-01), Nadkarni et al.
patent: 4466362 (1984-08-01), Maxwell et al.
patent: 4484928 (1984-11-01), Keller
patent: 4575418 (1986-03-01), Robbins

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