US4231759A
Expired / Lapsed
US
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Liquid hydrocarbon fuels containing high molecular weight Mannich bases
Assignee: Ethyl Corp
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Filing: 1973-03-12
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Granted: 1980-11-04
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Expires: 1993-03-12
Abstract
Abstract Reaction products obtained from the Mannich condensation of high molecular weight alkyl-substituted hydroxy aromatic compounds, amines and aldehydes provide improved detergency in liquid hydrocarbon fuels. Optionally, a non-volatile hydrocarbon carrier fluid may be included.
Inventors
- 👤 John H. Udelhofen
- 👤 Roger W. Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/238; C10L1/2383
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
A liquid hydrocarbon combustion fuel containing an amount sufficient to impart improved detergency properties thereto of an additive composition comprising the condensation product of (1) a high molecular weight sulfur-free alkyl-substituted hydroxyaromatic compound wherein the alkyl group has a number average molecular weight of from about 600 to about 3,000, (2) an amine which contains an amino group having at least one active hydrogen atom, and (3) an aldehyde, wherein the respective molar ratio of reactants is 1:0.1-10:0.1-10.
Claim 2
Dependent Claim
78 words
A liquid hydrocarbon combustion fuel containing an amount sufficient to impart improved detergency properties thereto of an additive composition comprising the condensation product of (1) a high molecular weight sulfur-free alkyl-substituted hydroxyaromatic compound wherein the alkyl group has a number average molecular weight of from about 600 to about 3,000, (2) an amine which contains an amino group having at least one active hydrogen atom, and (3) an aldehyde, wherein the respective molar ratio of reactants is 1:0.1-10:0.1-10.
Claim 3
Dependent Claim
25 words
The liquid hydrocarbon combustion fuel of claim 1 wherein the said condensation product comprises from 1 to about 200 pounds per thousand barrels of fuel.
Claim 4
Dependent Claim
25 words
The liquid hydrocarbon combustion fuel of claim 1 wherein the said condensation product comprises from 1 to about 25 pounds per thousand barrels of fuel.
Claim 5
Dependent Claim
23 words
The liquid hydrocarbon combustion fuel of claim 1 wherein the molecular weight of the alkyl substituent is from about 750 to about 1,200.
Claim 6
Dependent Claim
17 words
The liquid hydrocarbon combustion fuel of claim 1 wherein the alkyl-substituted hydroxyaromatic compound is an alkyl-substituted phenol.
Claim 7
Dependent Claim
21 words
The liquid hydrocarbon combustion fuel of claim 1 wherein said aldehyde is selected from the group cosisting of formaldehyde and paraformaldehyde.
Claim 8
Dependent Claim
23 words
The liquid hydrocarbon combustion fuel of claim 1 wherein said amine is selected from the group consisting of polyalkylpolyamines, polyalkylpolyamines and aromatic amines.
Claim 9
Dependent Claim
24 words
The liquid hydrocarbon combustion fuel of claim 1 wherein said amine is selected from the group consisting of dimethylamine, dimethylaminopropylamine, tetraethylenepentamine, triethylenetetramine and diethylenetriamine.
Claim 10
Dependent Claim
25 words
The liquid hydrocarbon combustion fuel of claim 1 wherein said alkyl-substituted hydroxy-aromatic compound is selected from the group consisting of polypropyl phenol and polybutyl phenol.
References Cited (Backward Citations)
US3948619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |