Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Patent
1979-11-05
1981-04-14
Gantz, Delbert E.
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
208 87, 208 95, C10G 4502, C10G 6704
Patent
active
042618134
ABSTRACT:
A method of denitrogenating an oil containing a relatively high concentration of nitrogenous compounds characterized by, first, extracting the nitrogenous compounds from the oil with an operable acid solvent to produce a raffinate of low nitrogen content oil and a bottoms of high nitrogen content oil; then recovering the acid solvent from the bottoms, simultaneously producing a small volumeteric flow rate stream of oil containing high content of nitrogenous compounds; depending upon the volumeteric rate of the high nitrogen content oil stream and upon demand, sending it to a hydrogen producing plant for supplying hydrogen for hydrogenation; and recycling the acid solvent. Preferred acid solvents comprise phosphoric acid, formic acid or the monoammonium salt of phosphoric acid. The recovery of the solvent may be by neutralization or by distillation. Also disclosed are complete process steps including an initial hydrogenation step before the extraction; the washing of the oil streams before they are sent to their destinations; and hydrodenitrogenation of the low nitrogen raffinate oil.
REFERENCES:
patent: 2263176 (1941-11-01), Lazar et al.
patent: 2662843 (1953-12-01), Castner et al.
patent: 2704758 (1955-03-01), Wetzel
patent: 4113607 (1978-09-01), Miller
patent: 4159940 (1979-07-01), Smith
Atlantic Richfield Company
Gantz Delbert E.
Schmitkons G. E.
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