Process for suppressing carbonate decomposition in vapor phase water retorting
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United States of America Patent
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-
Jan 6, 1981
Grant Date -
N/A
app pub date -
Mar 26, 1979
filing date -
Mar 26, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Oil shale containing relatively large quantities of alkaline carbonate minerals is retorted utilizing superheated water vapor at temperatures of from about 425.degree. C. to about 510.degree. C. Retorting with a sufficient carbon dioxide partial pressure effectively suppresses decomposition of the alkaline carbonates to obtain an environmentally acceptable retorted shale.
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