04016239 is referenced by 228 patents and cites 2 patents.

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.

Title
Recarbonation of spent oil shale
Application Number
5/579778
Publication Number
4016239
Application Date
May 22, 1975
Publication Date
April 5, 1977
Inventor
Donald M Fenton
Anaheim
CA, US
Agent
Dean Sandford
Richard C Hartman
Lannas S Henderson
Assignee
Union Oil Company of California
CA, US
IPC
C01F 11/18
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