Process for improving the diesel fuel quality of coal derived liquids
AssigneeMobil Oil Corporation
InventorsPhilip J. Angevine, Costandi A. Audeh, Samuel A. Tabak, Tsoung Y. Yan
Life of this patent
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Abstract
A process for preparing diesel fuel from coal-derived light fuel oils by alkylating said coal-derived light fuel oils with olefins and hydrotreating said alkylated product.
Claims28
A process for improving the quality of light fuel oil derived by the direct liquefaction of coal having a low cetane number, said process comprising the steps of:
- (i) contacting said light fuel oil liquid with an olefin having at least three carbon atoms under alkylation conditions.
A process for improving the quality of light fuel oil, derived by the direct liquefaction of coal, said process comprising the steps of:
- (i) hydrotreating a light fuel oil liquid;
- and
- (ii) contacting the hydrotreated liquid from step (i) with an olefin having at least three carbon atoms under alkylation conditions.
A process for improving the cetane index of light fuel oil derived by the direct liquefaction of coal comprising the step of:
- (i) contacting said light fuel oil with an olefin, having at least three carbon atoms, in the presence of an alkylation catalyst at a temperature in the range of from about 25.degree. to about 350.degree. C. and at from atmospheric to about 700 psig pressure.
A process for improving the cetane index of light fuel oil, derived by the direct liquefaction of coal said process comprising the steps of:
- (i) hydrotreating a light fuel oil;
- and
- (ii) contacting the hydrotreated liquid from step (i) with an olefin having at least three carbon atoms in the presence of an alkylation catalyst at a temperature in the range of from about 25.degree. to about 350.degree. C. and at from atmospheric to about 700 psig pressure.
A process for improving the quality of a light fuel oil having a boiling range of about 380.degree. F. to about 700.degree. F. and having a cetane number of about 7 to 10 which light fuel oil was derived by the direct liquefaction of coal which process comprises reacting said light fuel oil with a olefin having at least three carbon atoms at a temperature of about 25.degree. to 350.degree. C. and at a pressure of from about atmospheric to 700 psig in the presence of an acid alkylation catalyst whereby to produce a fuel oil having a cetane number of about 30 to 70.
Dependencies are inferred from the claim text.