Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Patent
1979-06-27
1981-06-09
Gantz, Delbert E.
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
208265, 208282, 208290, C10G 1704, C10G 1710
Patent
active
042723612
ABSTRACT:
A method is disclosed for reducing the nitrogen content of shale oil by removing nitrogen-containing compounds from the shale oil. The shale oil containing nitrogen-containing compounds is extracted with a sufficient amount of selective solvent which is selective toward the nitrogen-containing compounds present in the shale oil. The selective solvent comprises an active solvent for nitrogen-containing compounds and water in an amount sufficient to provide phase separation. The active solvent component of the selective solvent is selected from the group consisting of organic acids, and substituted organic acids, particularly acetic, formic and trichloroacetic acids and mixtures thereof. The selective solvent containing the nitrogen-containing compounds is separated from the reduced nitrogen content shale oil raffinate by phase disengagement.
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patent: 2309324 (1943-01-01), McAllister et al.
patent: 2541458 (1951-02-01), Berg
patent: 2662843 (1953-12-01), Castner et al.
patent: 2704758 (1955-03-01), Wetzel
patent: 4159940 (1979-04-01), Smith
Gantz Delbert E.
Occidental Research Corporation
Schmitkons G. E.
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