US4426208A
Expired / Lapsed
US
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Corrosion inhibitors for alcohol-based fuels
Assignee: Ethyl Corp
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Filing: 1981-11-02
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Granted: 1984-01-17
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Expires: 2001-11-02
Abstract
Abstract Liquid fuels for use in spark ignited internal combustion engines comprising (i) a major fraction of hydrocarbons boiling in the gasoline boiling range, (ii) a minor amount of ethanol and (iii) a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule, and (b) from about 95 to about 5 parts of an aliphatic dicarboxylic acid having from 2 to about 10 carbon atoms.
Inventors
- 👤 Warren L. Perilstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:01
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/1822; C10L1/1824; C10L1/188; C10L1/1881; C10L1/1883
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
86 words
A liquid fuel for use in spark ignited internal combustion engines comprising a major amount of hydrocarbons boiling in the gasoline boiling range, a minor amount of ethanol and a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms per molecule, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids.
Claim 2
Dependent Claim
86 words
A liquid fuel for use in spark ignited internal combustion engines comprising a major amount of hydrocarbons boiling in the gasoline boiling range, a minor amount of ethanol and a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms per molecule, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids.
Claim 3
Dependent Claim
11 words
The fuel of claim 1 wherein said ethanol is hydrous ethanol.
Claim 4
Dependent Claim
16 words
The fuel of claim 2 wherein said ethanol contains up to about 5.0 volume percent water.
Claim 5
Dependent Claim
82 words
The fuel of claim 1 comprising from about 70 to about 95 volume percent gasoline; from about 5 to about 30 volume percent hydrous ethanol and about 1.0 to about 100 ppm of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms per molecule, and (b) from 95 to 5 parts of said aliphatic dicarboxylic acid having from 2 to about 10 carbon atoms.
Claim 6
Dependent Claim
18 words
The fuel of claim 1 wherein said polymerized unsaturated aliphatic monocarboxylic acid is polymerized tall oil fatty acid.
Claim 7
Dependent Claim
15 words
The fuel of claim 1 wherein said polymerized unsaturated aliphatic monocarboxylic acid is oleic acid.
Claim 8
Dependent Claim
15 words
The fuel of claim 1 wherein said polymerized unsaturated aliphatic monocarboxylic acid is linoleic acid.
Claim 9
Dependent Claim
13 words
The fuel of claim 1 wherein said aliphatic dicarboxylic acid is oxalic acid.
Claim 10
Dependent Claim
13 words
The fuel of claim 1 wherein said aliphatic dicarboxylic acid is sebacic acid.
Claim 11
Dependent Claim
77 words
A process for conferring said corrosion properties to ethanol in gasoline fuel mixtures which comprises blending with said ethanol and said gasoline a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids.
Claim 12
Dependent Claim
77 words
A process for conferring said corrosion properties to ethanol in gasoline fuel mixtures which comprises blending with said ethanol and said gasoline a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids.
Claim 13
Dependent Claim
11 words
The process of claim 10 wherein said ethanol is hydrous ethanol.
Claim 14
Dependent Claim
16 words
The process of claim 11 wherein said ethanol contains up to about 5.0 volume percent water.
Claim 15
Dependent Claim
85 words
The process of claim 10 which comprises blending from about 70 to about 95 volume percent gasoline, from about 5 to about 30 volume percent hydrous ethanol and from about 1.0 to about 100 ppm a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms per molecule, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid having from 2 to about 10 carbon atoms.
Claim 16
Dependent Claim
18 words
The process of claim 10 wherein said polymerized unsaturated aliphatic monocarboxylic acid is polymerized tall oil fatty acid.
Claim 17
Dependent Claim
15 words
The process of claim 10 wherein said polymerized unsaturated aliphatic monocarboxylic acid is oleic acid.
Claim 18
Dependent Claim
15 words
The process of claim 10 wherein said polymerized unsaturated aliphatic monocarboxylic acid is linoleic acid.
Claim 19
Dependent Claim
13 words
The process of claim 10 wherein said aliphatic dicarboxylic acid is oxalic acid.
Claim 20
Dependent Claim
13 words
The process of claim 10 wherein said aliphatic dicarboxylic acid is sebacic acid.
Claim 21
Dependent Claim
87 words
A corrosion inhibitor concentrate for use in ethanol-gasoline fuel mixtures comprising about 35 percent to about 85 percent by weight of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids, and (c) about 65 percent to 15 percent by weight of a normally liquid hydrocarbon solvent.
Claim 22
Dependent Claim
87 words
A corrosion inhibitor concentrate for use in ethanol-gasoline fuel mixtures comprising about 35 percent to about 85 percent by weight of a mixture of (a) from about 5 to 95 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having from about 16 to 18 carbon atoms, and (b) from about 95 to 5 parts of an aliphatic dicarboxylic acid selected from the group consisting of oxalic and sebacic acids, and (c) about 65 percent to 15 percent by weight of a normally liquid hydrocarbon solvent.
Claim 23
Dependent Claim
18 words
A concentrate of claim 19 wherein said polymerized unsaturated aliphatic monocarboxylic acid is polymerized tall oil fatty acid.
Claim 24
Dependent Claim
15 words
A concentrate of claim 19 wherein said polymerized unsaturated aliphatic monocarboxylic acid is oleic acid.
Claim 25
Dependent Claim
15 words
A concentrate of claim 19 wherein said polymerized unsaturated aliphatic monocarboxylic acid is linoleic acid.
Claim 26
Dependent Claim
13 words
A concentrate of claim 19 wherein said aliphatic dicarboxylic acid is oxalic acid.
Claim 27
Dependent Claim
13 words
A concentrate of claim 19 wherein said aliphatic dicarboxylic acid is sebacic acid.
Claim 28
Dependent Claim
12 words
A concentrate of claim 19 wherein said hydrocarbon solvent is mineral oil.
Claim 29
Dependent Claim
11 words
A concentrate of claim 19 wherein said hydrocarbon solvent is xylene.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |