Method of manufacturing oxygenated fuel
AssigneesToyota Jidosha Kabushiki Kaisha, Genesis Research Institute, Inc.
InventorsKaoru Fujimoto, Noritatsu Tsubaki
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Abstract
A Fischer-Tropsch reaction is conducted using a synthesis gas (mixture of carbon monoxide and hydrogen) as a raw material to synthesize hydrocarbons containing a large amount of olefin. These hydrocarbons are separated into a light fraction and a heavy fraction by means of a heat exchanger and an oxo process is conducted with respect to the olefin contained in the light fraction with a cobalt catalyst. As a result, an oxygenated fuel containing alcohol, aldehyde, etc. is manufactured. The oxygenated fuel made by such a manufacturing method is excellent in lubricity and oxidation stability, has a high cetane number, and is also capable of suppressing generation of soot when the oxygenated fuel is combusted.
Claims7
A process for manufacturing an oxygenated diesel fuel which comprises:
- (a) initially conducting a Fischer-Tropsch synthesis wherein a mixture comprising hydrogen and carbon monoxide is reacted in the presence of a cobalt-containing catalyst at a pressure of 30 to 40 atmos.;
- (b) recovering a mixture comprising α-olefins of 10 carbon atoms or less;
- (c) thereafter conducting an oxo synthesis wherein said mixture of α-olefins is reacted with hydrogen and carbon monoxide at a pressure of 30 to 40 atmos.;
- (d) recovering a mixture comprising oxygenates;
- and
- (e) processing the oxygenate mixture into a diesel fuel, wherein the Fischer-Tropsch synthesis and the oxo synthesis are conducted under substantially equal pressure conditions in one reaction system.
Dependencies are inferred from the claim text.