Patent US4415513A successfully refreshed from Google Patents.
Patent US4549883A successfully refreshed from Google Patents.
US4549883A
Expired / Lapsed
US
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Cetane improver for diesel fuel
Assignee: Angus Chemical Co
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Filing: 1983-12-19
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Granted: 1985-10-29
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Expires: 2003-12-19
Abstract
Abstract Hydrocarbon-based fuel compositions which provide improved cetane ratings and a method of making them which comprises admixing a major amount of a petroleum fraction of the diesel boiling range and a small, effective amount of at least one compound having the general formula: <IMAGE> where R is H, CH3 or A; R' is H, CH3 or C2H5; A is <IMAGE> or is <IMAGE> R'' is H or C1-3 alkyl; and x is 1 or 2.
Inventors
- 👤 Robert F. Purcell
- 👤 Louis L. Hallock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/23; C10L1/231; C07; C07C; C07C205/00; C07C205/13; C07C205/14; C07C205/15; C07C205/39; C07C205/40; C07C205/45
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A fuel composition comprising a major amount of a hydrocarbon-based fuel and a small amount of at least one nitrate ester having the formula: ##STR11## where R is H, CH 3 or ##STR12## R' is H, CH 3 or C 2 H 5 ; R" is H Or C 1-3 alkyl; and x is 1 or 2 where said nitrate ester is present in an amount sufficient to produce an improvement in the cetane rating of said hydrocarbon-based fuel.
Claim 2
Dependent Claim
79 words
A fuel composition comprising a major amount of a hydrocarbon-based fuel and a small amount of at least one nitrate ester having the formula: ##STR11## where R is H, CH 3 or ##STR12## R' is H, CH 3 or C 2 H 5 ; R" is H Or C 1-3 alkyl; and x is 1 or 2 where said nitrate ester is present in an amount sufficient to produce an improvement in the cetane rating of said hydrocarbon-based fuel.
Claim 3
Dependent Claim
18 words
The fuel composition of claim 1 wherein said hydrocarbon-based fuel is a fuel boiling in the diesel range.
Claim 4
Dependent Claim
19 words
The fuel composition of claim 1 wherein said small amount is about 0.02 to about 1.0 percent by volume.
Claim 5
Dependent Claim
19 words
The fuel composition of claim 1 wherein said small amount is about 0.1 to about 0.5 percent by volume.
Claim 6
Independent Claim
78 words
A method of improving the cetane rating of a hydrocarbon-based fuel comprising mixing with a hydrocarbon-based fuel of the diesel boiling range an amount of at least one nitrate ester having the formula: ##STR13## where R is H, CH 3 or ##STR14## R' is H, CH 3 or C 2 H 5 ; R" is H or C 1-3 alkyl; and x is 1 or 2 effective to produce an improvement in cetane rating of said hydrocarbon-based fuel.
Claim 7
Independent Claim
78 words
A method of improving the cetane rating of a hydrocarbon-based fuel comprising mixing with a hydrocarbon-based fuel of the diesel boiling range an amount of at least one nitrate ester having the formula: ##STR13## where R is H, CH 3 or ##STR14## R' is H, CH 3 or C 2 H 5 ; R" is H or C 1-3 alkyl; and x is 1 or 2 effective to produce an improvement in cetane rating of said hydrocarbon-based fuel.
Claim 8
Dependent Claim
19 words
The method according to claim 5 wherein said effective amount is about 0.02 to about 1.0 percent by volume.
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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |