Use of electromagnetic radiation to recover alkali metal constit

Details Use of electromagnetic radiation to recover alkali metal constit Use of electromagnetic radiation to recover alkali metal constit

1981-07-06

1982-12-28

Kratz, Peter F.

Gas: heating and illuminating

Processes

Fuel mixtures

48210, 2041571R, 208 9, 252412, 252420, 423206R, 423208, C10J 354

Patent

active

043659756

ABSTRACT:
In a coal gasification operation or similar conversion process carried out in the presence of an alkali metal-containing catalyst wherein particles containing alkali metal residues are produced, alkali metal constituents are recovered from the particles by treating them with electromagnetic radiation having a frequency between about 0.10 MHz and about 10.sup.5 MHz in the presence of water or other aqueous medium. During the treatment step, the electromagnetic radiation facilitates the extraction of alkali metal constituents from the water-insoluble alkali metal compounds comprising the alkali metal residues. The resultant aqueous solution enriched in water-soluble alkali metal constituents is then separated from the particles depleted in alkali metal constituents and recycled to the gasification process where the alkali metal constituents serve as at least a portion of the alkali metal constituents which comprise the alkali metal-containing catalyst.

REFERENCES:
patent: 3998607 (1976-12-01), Wesselhoft
patent: 4148614 (1979-04-01), Kirkbride
patent: 4152120 (1979-05-01), Zavitsanos et al.
patent: 4193771 (1980-03-01), Sharp et al.
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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