Upgrading shale oil by a combination process
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United States of America Patent
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Aug 12, 1986
Grant Date -
N/A
app pub date -
Jun 27, 1985
filing date -
Jun 27, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for reducing the nitrogen content of shale oil is disclosed. The method comprises selectively extracting nitrogen-containing compounds to form a nitrogen-lean raffinate and a nitrogen-rich extract. The nitrogen-lean raffinate is distilled to form a distillate having a further reduced nitrogen content and a bottoms having a further increased nitrogen content. The bottoms is hydrotreated to remove nitrogen-containing compounds. Extracted shale oil compounds may be combined with the bottoms prior to the hydrotreatment or may be used to generate hydrogen gas for the hydrotreatment. Arsenic-containing compounds are removed from the distillate by extraction.
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