US4448586A
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Corrosion inhibitor compositions for alcohol-based fuels
Assignee: Ethyl Corp
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Filing: 1981-11-02
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Granted: 1984-05-15
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Expires: 2001-11-02
Abstract
Abstract Liquid fuels having anti-corrosion properties for use in internal combustion engines comprising (i) a major fraction of a monohydroxy alkanol having from 1 to about 5 carbon atoms, and (ii) a corrosion inhibiting amount of a mixture of (a) from about 5 to 95 parts of an alkyl or alkenyl succinic acid and an ester formed from that acid, or from a related alkyl or alkenyl succinic acid, and a glycol of 2 to 4 carbon atoms wherein the alkyl or alkenyl groups in the acid and in the ester each contain about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule.
Inventors
- 👤 Charles F. Weidig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:14
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/1883; C10L1/19; C10L1/1905
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
131 words
A liquid fuel for use in internal combustion engines comprising a major amount of a monohydroxy alkanol having from 1 to about 5 carbon atoms and a corrosion inhibiting amount of a mixture consisting essentially of (a) from about 5 to 95 parts of a mixture consisting essentially of 40 to 80 volume percent alkyl or alkenyl succinic acid and 20 to 60 volume percent of an ester of an alkyl or alkenyl succinic acid and a glycol containing 2 to 4 carbon atoms; wherein the alkyl and alkenyl groups in said acid and in said ester each contain about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule.
Claim 2
Dependent Claim
131 words
A liquid fuel for use in internal combustion engines comprising a major amount of a monohydroxy alkanol having from 1 to about 5 carbon atoms and a corrosion inhibiting amount of a mixture consisting essentially of (a) from about 5 to 95 parts of a mixture consisting essentially of 40 to 80 volume percent alkyl or alkenyl succinic acid and 20 to 60 volume percent of an ester of an alkyl or alkenyl succinic acid and a glycol containing 2 to 4 carbon atoms; wherein the alkyl and alkenyl groups in said acid and in said ester each contain about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule.
Claim 3
Dependent Claim
14 words
The fuel of claim 1 wherein said alkanol is anhydrous or substantially anhydrous ethanol.
Claim 4
Dependent Claim
11 words
The fuel of claim 1 wherein said alkanol is hydrous ethanol.
Claim 5
Dependent Claim
16 words
The fuel of claim 3 wherein said ethanol contains up to about 25 volume percent water.
Claim 6
Dependent Claim
20 words
The fuel of claim 1 wherein said alkenyl succinic acid is tetrapropenyl succinic acid and said glycol is propylene glycol.
Claim 7
Dependent Claim
18 words
The fuel of claim 1 wherein the polymerized unsaturated aliphatic monocarboxylic acid is polymerized tall oil fatty acid.
Claim 8
Dependent Claim
15 words
The fuel of claim 1 wherein the polymerized unsaturated aliphatic monocarboxylic acid is oleic acid.
Claim 9
Dependent Claim
15 words
The fuel of claim 1 wherein the polymerized unsaturated aliphatic monocarboxylic acid is linoleic acid.
Claim 10
Dependent Claim
25 words
The fuel of claim 1 wherein said mixture of components (a) and (b) is present in an amount of from about 1 to 100 ppm.
Claim 11
Dependent Claim
138 words
A corrosion inhibitor concentrate for use in an alcohol-based fuel said concentrate consisting essentially of from about 35% to about 85%, by weight, of a mixture of (a) from about 5 to 95 parts of a mixture consisting essentially of 40 to 80 volume percent alkyl or alkenyl succinic acid and 20 to 60 volume percent of an ester of an alkyl or alkenyl succinic acid and a glycol containing 2 to 4 carbon atoms wherein the alkyl and alkenyl groups in said acid and said ester each contains about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule, and from about 65% to 15%, by weight, of (c) at least one normally liquid hydrocarbon solvent.
Claim 12
Dependent Claim
138 words
A corrosion inhibitor concentrate for use in an alcohol-based fuel said concentrate consisting essentially of from about 35% to about 85%, by weight, of a mixture of (a) from about 5 to 95 parts of a mixture consisting essentially of 40 to 80 volume percent alkyl or alkenyl succinic acid and 20 to 60 volume percent of an ester of an alkyl or alkenyl succinic acid and a glycol containing 2 to 4 carbon atoms wherein the alkyl and alkenyl groups in said acid and said ester each contains about 8 to 30 carbon atoms, and (b) from about 95 to 5 parts of at least one polymerized unsaturated aliphatic monocarboxylic acid having about 16 to 18 carbon atoms per molecule, and from about 65% to 15%, by weight, of (c) at least one normally liquid hydrocarbon solvent.
Claim 13
Dependent Claim
18 words
A concentrate of claim 10 wherein the polymerized unsaturated aliphatic monocarboxylic acid is polymerized tall oil fatty acid.
Claim 14
Dependent Claim
15 words
A concentrate of claim 10 wherein the polymerized unsaturated aliphatic monocarboxylic acid is oleic acid.
Claim 15
Dependent Claim
15 words
A concentrate of claim 10 wherein the polymerized unsaturated aliphatic monocarboxylic acid is linoleic acid.
Claim 16
Dependent Claim
19 words
A concentrate of claim 10 wherein said succinic acid is tetrapropenyl succinic acid and said glycol is propylene glycol.
Claim 17
Dependent Claim
12 words
A concentrate of claim 10 wherein said hydrocarbon solvent is mineral oil.
Claim 18
Dependent Claim
11 words
A concentrate of claim 10 wherein said hydrocarbon solvent is xylene.
Claim 19
Dependent Claim
12 words
A concentrate of claim 10 wherein said hydrocarbon solvent is aromatic naphtha.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |