Process for treating hot shale oil effluent from a retort
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United States of America Patent
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-
Jan 1, 1980
Grant Date -
N/A
app pub date -
Mar 29, 1978
filing date -
Mar 29, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Oil shale retort effluent having a temperature of at least 650.degree. F. (343.degree. C.) is cooled, if necessary, to within the range from 600.degree.-800.degree. F. (316.degree.-427.degree. C.), separated into a liquid phase and a vapor phase, and the liquid phase is maintained within that range for 1 to 120 minutes to form a liquid product having a pour point less than 40.degree. F. (4.4.degree. C.). When the effluent contains at least one contaminant selected from soluble iron and soluble arsenic and is withdrawn from the retort at a temperature of at least 300.degree. F. (149.degree. C.), maintaining the liquid phase at a temperature from 300.degree.-800.degree. F. (149.degree.-427.degree. C.) will cause formation of (1) a precipitate containing iron, arsenic or both and (2) a liquid product having a reduced contaminant content.
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