US4723963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel having improved cetane
Assignee: EXXON RESEARCH Co
•
Filing: 1986-07-21
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Granted: 1988-02-09
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Expires: 2006-07-21
Abstract
Abstract A middle distillate hydrocarbon fuel boiling in the range of about 160 DEG C. to about 400 DEG C. having an improved cetane number is disclosed. The fuel comprises at least about 3 weight percent oxygenated compounds preferably at least about 3 weight percent oxygenated aromatic compounds. The oxygenated compounds preferably comprise alkylaromatics and/or hydroaromatics, preferably oxygenated at the benzylic carbon position.
Inventors
- 👤 William F. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:00
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/1811; C10L1/182; C10L1/1822; C10L1/1824; C10L1/185; C10L1/1857; C10L1/19
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
37 words
A middle distillate fuel containing at least about 0.5 wt. % of hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixtures thereof.
Claim 2
Dependent Claim
37 words
A middle distillate fuel containing at least about 0.5 wt. % of hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixtures thereof.
Claim 3
Dependent Claim
13 words
The fuel of claim 1 containing from about 0.5-75 wt.% of said species.
Claim 4
Dependent Claim
15 words
The fuel of claim 1 containing at least about 1 wt. % of said species.
Claim 5
Dependent Claim
14 words
The fuel of claim 3 containing from about 2-50 wt. % of said species.
Claim 6
Dependent Claim
14 words
The fuel of claim 4 containing from about 5-30 wt. % of said species.
Claim 7
Dependent Claim
15 words
The fuel of claim 5 containing at least about 10 wt. % of said species.
Claim 8
Dependent Claim
45 words
A middle distillate fuel boiling within the range of from about 160°-400° C. containing at least about 0.5 wt. % hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixture thereof.
Claim 9
Dependent Claim
45 words
A middle distillate fuel boiling within the range of from about 160°-400° C. containing at least about 0.5 wt. % hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixture thereof.
Claim 10
Dependent Claim
14 words
The fuel of claim 7 containing between about 0.5-75 wt. % of said species.
Claim 11
Dependent Claim
14 words
The fuel of claim 7 containing at least about 1 wt.% of said species.
Claim 12
Dependent Claim
14 words
The fuel of claim 9 containing from about 2-50 wt. % of said species.
Claim 13
Dependent Claim
14 words
The fuel of claim 10 containing from about 5-30 wt. % of said species.
Claim 14
Dependent Claim
15 words
The fuel of claim 7 containing at least about 10 wt. % of said species.
Claim 15
Dependent Claim
56 words
A middle distillate fuel boiling within the range of from about 160°-400° C. containing at least about 0.5 wt. % of hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds are selected from the group consisting of alkyl benzenes, alkylnaphthalenes, 1,2,3,4 tetrahydronaphthalenes, acenaphthenes, indans, fluorenes and mixtures thereof.
Claim 16
Dependent Claim
56 words
A middle distillate fuel boiling within the range of from about 160°-400° C. containing at least about 0.5 wt. % of hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds are selected from the group consisting of alkyl benzenes, alkylnaphthalenes, 1,2,3,4 tetrahydronaphthalenes, acenaphthenes, indans, fluorenes and mixtures thereof.
Claim 17
Dependent Claim
13 words
The fuel of claim 13 containing from about 0.5-75 wt.% of said species.
Claim 18
Dependent Claim
15 words
The fuel of claim 13 containing at least about 1 wt. % of said species.
Claim 19
Dependent Claim
14 words
The fuel of claim 15 containing from about 2-50 wt. % of said species.
Claim 20
Dependent Claim
14 words
The fuel of claim 16 containing from about 5-30 wt. % of said species.
Claim 21
Dependent Claim
15 words
The fuel of claim 13 containing at least about 10 wt. % of said species.
Claim 22
Dependent Claim
71 words
A middle distillate hydrocarbon fuel boiling within the range of from about 160°-400° C. which is selected from the group consisting of light cat cycle oil, light cat heating oil, coker liquids, kerosene, diesel fuel, or mixture thereof and contains at least about 0.5 wt. % hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixtures thereof.
Claim 23
Dependent Claim
71 words
A middle distillate hydrocarbon fuel boiling within the range of from about 160°-400° C. which is selected from the group consisting of light cat cycle oil, light cat heating oil, coker liquids, kerosene, diesel fuel, or mixture thereof and contains at least about 0.5 wt. % hydrocarbon compounds which contain benzylic alcohol species, benzylic ketone species or mixture thereof wherein said hydrocarbon compounds comprise aromatic compounds, hydroaromatic compounds or mixtures thereof.
Claim 24
Dependent Claim
13 words
The fuel of claim 19 containing from about 0.5-75 wt.% of said species.
Claim 25
Dependent Claim
15 words
The fuel of claim 19 containing at least about 1 wt. % of said species.
Claim 26
Dependent Claim
14 words
The fuel of claim 21 containing from about 2-50 wt. % of said species.
Claim 27
Dependent Claim
14 words
The fuel of claim 22 containing from about 5-30 wt. % of said species.
Claim 28
Dependent Claim
15 words
The fuel of claim 19 containing at least about 10 wt. % of said species.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |