Patent US4378973A successfully refreshed from Google Patents.
US4378973A
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US
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Diesel fuel containing cyclohexane, and oxygenated compounds
Assignee: Texaco Inc
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Filing: 1982-01-07
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Granted: 1983-04-05
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Expires: 2002-01-07
Abstract
Abstract The amount of smoke, soot and invisible particulates emitted with the exhaust of engines run on diesel fuel is reduced by incorporating therein an additive consisting of a synergistic mixture of cyclohexane with an oxygenated compound which readily gives up oxygen during combustion. Also disclosed is a method of operating a diesel engine using the fuel of the invention.
Inventors
- 👤 William M. Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:01
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/02; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1608; C10L1/18; C10L1/182; C10L1/1822; C10L1/1824; C10L1/185; C10L1/1852; C10L1/1855; C10L1/1857; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A diesel fuel composition comprising a mixture of hydrocarbons boiling in the range of 320° to 700° F. and a particulate-suppressing amount of a mixture of cyclohexane with at least one oxygenated compound selected from the group of aldehydes and ketones having from 3 to 16 carbon; normal alcohols having from 2 to 26 carbon atoms in the chain; ethers or cyclic ethers having from 2 to 16 carbon atoms and mixtures thereof; said compound being present in an amount sufficient to provide from 0.0001 to 1.5 weight percent of oxygen to said fuel.
Claim 2
Dependent Claim
94 words
A diesel fuel composition comprising a mixture of hydrocarbons boiling in the range of 320° to 700° F. and a particulate-suppressing amount of a mixture of cyclohexane with at least one oxygenated compound selected from the group of aldehydes and ketones having from 3 to 16 carbon; normal alcohols having from 2 to 26 carbon atoms in the chain; ethers or cyclic ethers having from 2 to 16 carbon atoms and mixtures thereof; said compound being present in an amount sufficient to provide from 0.0001 to 1.5 weight percent of oxygen to said fuel.
Claim 3
Dependent Claim
24 words
The fuel of claim 1, containing from 0.5 to 5.0 weight percent of cyclohexane, and 0.5 to 5.0 weight percent of said oxygenated compound.
Claim 4
Dependent Claim
14 words
The fuel of claim 1, wherein said compound is isobutyl heptyl ketone or acetone.
Claim 5
Dependent Claim
15 words
The fuel of claim 1, wherein said compound is tetrahydrofuran, 1,2-butylene oxide or dimethyl ether.
Claim 6
Dependent Claim
10 words
The fuel of claim 1, wherein said compound is propionaldehyde.
Claim 7
Dependent Claim
25 words
The fuel of claim 1, wherein said compound is ethanol, 2-ethylhexanol or a mixture of normal primary alcohols containing from 6 to 20 carbon atoms.
Claim 8
Dependent Claim
37 words
A method for reducing the exhaust particulate in the smoke of a diesel engine and the amount of smoke emitted thereby which comprises supplying to and burning in said engine a composition as defined in claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |