Process for removing nitrogen from fuel streams with caprolactamium ionic liquids
AssigneeUop LLC
InventorsManuela Serban, Alan B. Levy, Lihao Tang, Alakananda Bhattacharyya
Life of this patent
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Abstract
A process for removing a nitrogen compound from a fuel feed, such as vacuum gas oil or diesel fuel, wherein the process includes contacting the fuel feed comprising the nitrogen compound with a fuel-immiscible caprolactamium ionic liquid to produce a fuel and fuel-immiscible caprolactamium ionic liquid mixture, and separating the mixture to produce a vacuum gas oil or a diesel effluent having a reduced nitrogen content relative to the vacuum gas oil or diesel feed. The invention provides an alternate use for caprolactamium ionic liquid that is produced in large quantities for the manufacture of caprolactam.
Claims20
A process for removing nitrogen compounds from a fuel comprising:
- (a) contacting the fuel comprising nitrogen compounds with a fuel-immiscible caprolactamium ionic liquid to produce a mixture comprising the fuel and the fuel-immiscible caprolactamium ionic liquid;
- and
- (b) separating the mixture to produce a fuel effluent and a fuel-immiscible caprolactamium ionic liquid effluent, the fuel-immiscible caprolactamium ionic liquid effluent comprising the nitrogen compound.
A process for removing nitrogen compounds from a fuel comprising:
- (a) contacting the fuel comprising the nitrogen compounds with a fuel-immiscible caprolactamium ionic liquid to produce a mixture comprising the fuel, and the fuel-immiscible caprolactamium ionic liquid;
- (b) separating the mixture to produce a fuel effluent and a fuel-immiscible caprolactamium ionic liquid effluent, the fuel-immiscible caprolactamium ionic liquid effluent comprising the nitrogen compound;
- (c) washing at least a portion of the fuel effluent with water to produce a washed fuel stream and a spent water stream;
- (d) contacting the fuel-immiscible caprolactamium ionic liquid effluent with a regeneration solvent and separating the fuel-immiscible caprolactamium ionic liquid effluent from the regeneration solvent to produce an extract stream comprising the nitrogen compound and a regenerated fuel-immiscible caprolactamium ionic liquid stream;
- and
- (e) drying at least a portion of at least one of the fuel-immiscible caprolactamium ionic liquid effluent;
- the spent water stream, and the regenerated fuel-immiscible caprolactamium ionic liquid stream to produce a dried fuel-immiscible caprolactamium ionic liquid stream.
Dependencies are inferred from the claim text.