Back to results
US 4,398,978 AGranted
High density, low viscosity airbreather fuel (RJ-4-I)
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsGeorge W. Burdette, Abraham I. Schneider
Life of this patent
Estimating the term…
Abstract
A method for preparation of high density, high energy, low viscosity liquid ydrocarbon fuel by catalytic treatment of tetrahydrodimethyldicyclopentadiene (RJ-4) synthetic fuel. Endo-isomers within the fuel stock are isomerized to exo-isomers by treatment of the fuel stock with catalysts such as aluminum chloride, nickel, or pulverized, acid treated firebrick resulting in a fuel having a lower viscosity than the original RJ-4.
Claims7
A process for making a high density, low viscosity liquid airbreather fuel, isomerized RJ-4, comprising the steps of:
- (a) contacting RJ-4, comprising both endo-tetrahydrodimethylidicylopentadiene and exo-tetrahydrodimethyldicyclopentadiene isomers, with a catalyst consisting essentially of an AlCl.sub.3 -olefin complex;
- and
- (b) treating for a sufficient time to obtain isomerized RJ-4 consisting essentially of the exo-tetrahydrodimethyldicyclopentadiene isomer.
Dependencies are inferred from the claim text.