Recarbonation of spent oil shale

Details Recarbonation of spent oil shale Recarbonation of spent oil shale

1975-05-22

1977-04-05

Gantz, Delbert E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

208 11R, C01F 1118

Patent

active

040162397

ABSTRACT:
Spent oil shale from retorting operations, containing water-soluble alkaline oxides such as calcium oxide is subjected to a recarbonation process in order to reduce its alkalinity and thereby prevent ecological damage to plant and aquatic animal life which could result from alkaline leachings derived rom rain or snowfall on open dumps of such spent shale. For economic reasons, a rapid recarbonation is necessary, and such is achieved herein by wetting the spent shale with water containing dissolved carbonate and/or bicarbonate salts, and contacting the so wetted spent shale with an atmosphere comprising a substantial partial pressure of carbon dioxide for a period of time ranging between about 10 minutes and two hours.

REFERENCES:
patent: 2637545 (1953-05-01), Hicguet
patent: 3510255 (1970-05-01), Hall et al.

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