Thermally metamorphosing oil shale to inhibit leaching

Details Thermally metamorphosing oil shale to inhibit leaching Thermally metamorphosing oil shale to inhibit leaching

1978-06-29

1980-05-13

Novosad, Stephen J.

Wells

Processes

In situ combustion

166259, 166263, 166272, 299 2, E21B 4324, E21C 4110

Patent

active

042024129

ABSTRACT:
When processing a fragmented permeable mass of particles containing oil shale for recovering liquid and gaseous values, a portion of the oil shale is thermally metamorphosed. However, a zone of non-thermally metamorphosed particles can be left in the fragmented mass after completion of processing. To inhibit leaching by water of water-soluble constituents of such non-thermally metamorphosed particles, a heating fluid, such as a mixture of fuel and an oxygen-containing gas, is introduced to the fragmented mass containing non-thermally metamorphosed particles for heating at least a portion of the non-metamorphosed particles to a sufficiently high temperature for forming water-insoluble metamorphic minerals at at least the surfaces of such particles.

REFERENCES:
patent: 3111986 (1963-11-01), Kuhn, Jr.
patent: 3292699 (1966-12-01), Slusser et al.
patent: 3454958 (1969-07-01), Parker
patent: 3586377 (1971-06-01), Ellington
patent: 3630278 (1971-12-01), Parker
patent: 4057293 (1977-11-01), Garrett
patent: 4126180 (1978-11-01), Cha

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