# US 4,394,528 A · High energy fuel compositions

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- Number: US 4,394,528 A
- Document ID: US4394528A
- Status: Granted
- Kind: A
- Application number: 06/271,451
- Filed: 1981-06-08
- Granted: 1983-07-19
- Earliest claimed: 1981-06-08
- Assignees: Ashland Oil, Inc.
- Inventors: Dennis H. Fisher
- Web page: https://patentgrep.com/patent/US4394528A

## CPC

- C10L 1/04: essentially based on blends of hydrocarbons
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS

## Abstract

A high density liquid hydrocarbon fuel composition singularly suited for propelling turbojet limited volume missile systems designed for shipborne deployment. The contemplated fuels are basically composed of the saturated analogues of dimers of methyl cyclopentadiene and of dicyclopentadiene and optionally include the saturated analogues of the co-trimers of said dienes or the trimers of cyclopentadiene. The various dimers and trimers are combined in a relative relationship to provide optimal performing fuels for the indicated purpose.

## Claims

### Claim 1

A composite high density fuel having a net heat of combustion of at least 140,000 BTU/gal., a flash point between 140.degree. and 150.degree. F. and a viscosity not in excess of about 30 cps at 0.degree. F.; said fuel consisting essentially of (a) 35-90 wt. % of an isomeric mixture of tetrahydromethylcyclopentadiene dimers conforming to the physical property specifications for RJ-4; (b) 10-40 wt. % exo-tetrahydrodicyclopentadiene; and (c) 0-30 wt. % of the hydrogenated derivatives of a co-trimer of cyclopentadiene and methyl cyclopentadiene or a trimer of cyclopentadiene.

### Claim 2 (depends on 1)

The composite high density fuel according to claim 1 consisting essentially of 60-90 parts by weight of an isomeric mixture of tetrahydromethylcyclopentadiene dimers conforming to the physical property specifications for RJ-4 and correspondingly from 40-10 parts by weight exo-tetrahydrodicyclopentadiene.

### Claim 3 (depends on 1)

A composite high density fuel according to claim 1 consisting essentially of 70-80 parts by weight of an isomeric mixture of tetrahydromethylcyclopentadiene dimers conforming to the physical property specifications for RJ-4 and correspondingly from 30-20 parts exo-tetrahydrodicyclopentadiene.

### Claim 4 (depends on 1)

A composite high density fuel according to claim 1 consisting essentially of (a) 30-60 wt. % of an isomeric mixture of tetrahydromethylcyclopentadiene dimers conforming to the physical property specifications for RJ-4; (b) 30-40 wt. % exo-tetrahydrodicyclopentadiene; and (c) 10-30 wt.% of the hydrogenated derivatives of a co-trimer of cyclopentadiene and methyl cyclopentadiene or the trimers of cyclopentadiene.