Coal and oil shale beneficiation process

Details Coal and oil shale beneficiation process Coal and oil shale beneficiation process

1981-05-11

1983-10-11

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

208 11LE, 208252, C10L 902, C10G 104

Patent

active

044089996

ABSTRACT:
Coal, oil shale and similar carbonaceous solids are beneficiated by subjecting the solids to electromagnetic radiation having a frequency between about 0.1 MHz and about 10.sup.5 MHz in the presence of an aqueous acid solution. The electromagnetic energy enables the acid to solubilize a substantial portion of the mineral matter contained in the solids at low temperatures and pressures, thereby producing beneficiated carbonaceous solids containing relatively small amounts of inorganic constituents.

REFERENCES:
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patent: 4076607 (1978-02-01), Zavitsanos et al.
patent: 4083940 (1978-04-01), Das
patent: 4134737 (1979-01-01), Yang
patent: 4148614 (1979-04-01), Kirkbride
patent: 4152120 (1979-05-01), Zavitsanos et al.
patent: 4153533 (1979-05-01), Kirkbride
patent: 4169710 (1979-10-01), Jensen
Barrett, P., Davidowsky, Jr., L. J., Penaro, K. W., and Copeland, T. R., "Microwave Oven-Based Wet Digestion Technique", Analytical Chemistry, vol. 50, No. 7, Jun. 1978.
Abu-Samra, A., Morris, J. S., and Koirtyohann, S. R., "Wet Ashing of Some Biological Samples in a Microwave Oven", Analytical Chemistry, vol. 47, No. 8, Jul. 1975.

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