US4511368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors for alcohol-based fuels
Assignee: ETHLY Corp
•
Filing: 1984-06-18
•
Granted: 1985-04-16
•
Expires: 2004-06-18
Abstract
Abstract Corrosion caused by gasohol or alcohol motor fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acid (e.g. linoleic dimer and/or trimer) and (B) a substituted imidazoline, e.g., 2-heptadecenyl-1-(2-hydroxyethyl)imidazoline.
Inventors
- 👤 Gordon G. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:40
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/1883; C10L1/22; C10L1/232
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of 5 to 100 weight percent of one or more alcohols, 0 to 95 weight percent gasoline and a corrosion inhibiting amount of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR3## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 2
Dependent Claim
86 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of 5 to 100 weight percent of one or more alcohols, 0 to 95 weight percent gasoline and a corrosion inhibiting amount of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR3## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 3
Dependent Claim
31 words
A liquid fuel of claim 1 wherein said polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids comprises mainly linoleic acid dimer, trimer or mixtures thereof.
Claim 4
Dependent Claim
12 words
A liquid fuel of claim 2 wherein said substituted imidazoline is 2-heptadecenyl-1-(2-hydroxyethyl)imidazoline.
Claim 5
Dependent Claim
64 words
A corrosion inhibitor concentrate consisting essentially of a solvent containing 5 to 60 weight percent of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR4## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 6
Dependent Claim
64 words
A corrosion inhibitor concentrate consisting essentially of a solvent containing 5 to 60 weight percent of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR4## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 7
Dependent Claim
30 words
A concentrate of claim 4 wherein said polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids comprises mainly linoleic acid dimer, trimer or mixtures thereof.
Claim 8
Dependent Claim
11 words
A concentrate of claim 5 wherein said substituted imidazoline is 2-heptadecenyl-1-(2-hydroxyethyl)imidazoline.
Claim 9
Dependent Claim
104 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of a major amount of a hydrocarbon distillate in the gasoline distillation range and from about 2 to about 30 volume percent of one or more alkanols containing from 1 to about 4 carbon atoms and a corrosion inhibiting amount of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR5## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 10
Dependent Claim
104 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of a major amount of a hydrocarbon distillate in the gasoline distillation range and from about 2 to about 30 volume percent of one or more alkanols containing from 1 to about 4 carbon atoms and a corrosion inhibiting amount of a combination of (A) a polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids and (B) at least one substituted imidazoline having the structural formula: ##STR5## in which R is a hydrocarbon alkenyl group having from about 7 to about 24 carbon atoms.
Claim 11
Dependent Claim
31 words
A liquid fuel of claim 7 wherein said polymer of one or more C 16 to C 18 polyunsaturated aliphatic monocarboxylic acids comprises mainly linoleic acid dimer, trimer or mixtures thereof.
Claim 12
Dependent Claim
12 words
A liquid fuel of claim 8 wherein said substituted imidazoline is 2-heptadecenyl-1-(2-hydroxyethyl)imidazoline.
References Cited (Backward Citations)
US2632695A
Cited
US2948598A
Cited
US2919979A
Cited
US3337472A
Cited
US4185594A
Cited
US4305730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |