Patent US4376635A successfully refreshed from Google Patents.
US4376635A
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Novel gasohol or ethanol fuel composition containing as a corrosion inhibitor the reaction product of benzothiazole, formaldehyde and an N-alkyl propylene diamine
Assignee: Texaco Inc
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Filing: 1980-09-22
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Granted: 1983-03-15
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Expires: 2000-09-22
Abstract
Abstract A novel fuel composition contains ethanol or gasohol plus, as a corrosion inhibitor, a reaction product of benzotriazole, formaldehyde, and an N-alkyl propylene diamine.
Inventors
- 👤 Rodney L. Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/02; C10L1/023
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
101 words
A fuel composition for internal combustion engines comprising (a) a major portion of a fuel containing (i) at least one alcohol selected from the group consisting of ethanol and methanol and (ii) gasoline in amount of 0-50 volumes per volume of alcohol; and (b) a minor corrosion inhibiting amount of, as a corrosion inhibiting agent, a reaction product of (i) a benzotriazole, (ii) an aldehyde or a ketone, and (iii) a C 3 -C 12 poly-primary amine bearing at least one free --NH 2 group and at least one --NHR' group wherein R' is a C 12 -C 18 hydrocarbon group.
Claim 2
Dependent Claim
101 words
A fuel composition for internal combustion engines comprising (a) a major portion of a fuel containing (i) at least one alcohol selected from the group consisting of ethanol and methanol and (ii) gasoline in amount of 0-50 volumes per volume of alcohol; and (b) a minor corrosion inhibiting amount of, as a corrosion inhibiting agent, a reaction product of (i) a benzotriazole, (ii) an aldehyde or a ketone, and (iii) a C 3 -C 12 poly-primary amine bearing at least one free --NH 2 group and at least one --NHR' group wherein R' is a C 12 -C 18 hydrocarbon group.
Claim 3
Dependent Claim
18 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is an alcohol.
Claim 4
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is methanol.
Claim 5
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is ethanol.
Claim 6
Dependent Claim
19 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is a commercial ethanol.
Claim 7
Dependent Claim
21 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is a commercial ethanol containing acid.
Claim 8
Dependent Claim
22 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is a commercial ethanol containing acetic acid.
Claim 9
Dependent Claim
18 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is a gasohol.
Claim 10
Dependent Claim
18 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel is substantially anhydrous.
Claim 11
Dependent Claim
22 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said fuel contains less than 0.3 v % water.
Claim 12
Dependent Claim
19 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said benzotriazole is benzotriazole per se.
Claim 13
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said aldehyde is formaldehyde.
Claim 14
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said aldehyde is acetaldehyde.
Claim 15
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said aldehyde is benzaldehyde.
Claim 16
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said ketone is acetone.
Claim 17
Dependent Claim
19 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said ketone is methyl ethyl ketone.
Claim 18
Dependent Claim
17 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said ketone is acetophenone.
Claim 19
Dependent Claim
18 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said amine is a diamine.
Claim 20
Dependent Claim
22 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said amine is a diamine containing an --NHR' group.
Claim 21
Dependent Claim
42 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said amine is R'--NH--R"--NH 2 , R" is alkylene, arylene, alkarylene, arylene, or cycloalkylene hydrocarbon and R' is C 12 -C 18 alkyl, alkaryl, aralkyl, aryl, or cycloalkyl hydrocarbon.
Claim 22
Dependent Claim
32 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said amine is R'--NH--CH 2 CH 2 CH 2 NH 2 and R' is C 12 -C 18 alkyl.
Claim 23
Dependent Claim
42 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said benzotriazole is benzotriazole per se, said aldehyde is formaldehyde, and said amine is R'NHCH 2 CH 2 CH 2 NH 2 , and R' is oleoyl or tallowyl.
Claim 24
Dependent Claim
34 words
A fuel composition for internal combustion engines as claimed in claim 1 wherein said corrosion inhibiting agent is present in minor corrosion inhibiting amount of 0.0001 w %-0.001 w % of said fuel composition.
Claim 25
Dependent Claim
67 words
A fuel composition for internal combustion engines comprising (a) a major portion of a fuel containing absolute ethanol; and (b) a minor corrosion inhibiting amount, 0.001 w %-0.001 w % of said fuel composition, of as a corrosion inhibiting agent, a reaction product of benzotriazole per se, formaldehyde, and R' NHCH 2 CH 2 CH 2 NH 2 wherein R' is C 12 -C 18 alkyl hydrocarbon.
Claim 26
Dependent Claim
67 words
A fuel composition for internal combustion engines comprising (a) a major portion of a fuel containing absolute ethanol; and (b) a minor corrosion inhibiting amount, 0.001 w %-0.001 w % of said fuel composition, of as a corrosion inhibiting agent, a reaction product of benzotriazole per se, formaldehyde, and R' NHCH 2 CH 2 CH 2 NH 2 wherein R' is C 12 -C 18 alkyl hydrocarbon.
Claim 27
Dependent Claim
49 words
A composition comprising a reaction product of (i) a benzotriazole, (ii) an aldehyde or a ketone, and (iii) a C 3 -C 12 poly-primary amine bearing at least one free --NH 2 group and at least one --NHR' group wherein R' is a C 12 -C 18 hydrocarbon group.
Claim 28
Dependent Claim
49 words
A composition comprising a reaction product of (i) a benzotriazole, (ii) an aldehyde or a ketone, and (iii) a C 3 -C 12 poly-primary amine bearing at least one free --NH 2 group and at least one --NHR' group wherein R' is a C 12 -C 18 hydrocarbon group.
Claim 29
Dependent Claim
14 words
A composition as claimed in claim 25 wherein said benzotriazole is benzotriazole per se.
Claim 30
Dependent Claim
12 words
A composition as claimed in claim 25 wherein said aldehyde is formaldehyde.
Claim 31
Dependent Claim
12 words
A composition as claimed in claim 25 wherein said aldehyde is acetaldehyde.
Claim 32
Dependent Claim
12 words
A composition as claimed in claim 25 wherein said aldehyde is benzaldehyde.
Claim 33
Dependent Claim
12 words
A composition as claimed in claim 25 wherein said ketone is acetone.
Claim 34
Dependent Claim
14 words
A composition as claimed in claim 25 wherein said ketone is methyl ethyl ketone.
Claim 35
Dependent Claim
12 words
A composition as claimed in claim 25 wherein said ketone is acetophenone.
Claim 36
Dependent Claim
13 words
A composition as claimed in claim 25 wherein said amine is a diamine.
Claim 37
Dependent Claim
17 words
A composition as claimed in claim 25 wherein said amine is a diamine containing an --NHR group.
Claim 38
Dependent Claim
36 words
A composition as claimed in claim 25 wherein said amine is R'--NH--R"--NH 2 , R" is alkylene, arylene, alkarylene, arylene, or cycloalkylene and R' is C 12 -C 18 alkyl, alkaryl, aralkyl, aryl, or cycloalkyl hydrocarbon.
Claim 39
Dependent Claim
27 words
A composition as claimed in claim 25 wherein said amine is R'--NH--CH 2 CH 2 CH 2 NH 2 and R' is C 12 -C 18 alkyl.
Claim 40
Dependent Claim
37 words
A composition as claimed in claim 25 wherein said benzotriazole is benzotriazole per se, said aldehyde is formaldehyde, and said amine is R'NHCH 2 CH 2 CH 2 NH 2 , and R' is oleoyl or tallowyl.
Claim 41
Dependent Claim
14 words
##STR2## wherein R' is a C 12 -C 18 straight chain alkyl hydrocarbon group.
Claim 42
Dependent Claim
14 words
##STR2## wherein R' is a C 12 -C 18 straight chain alkyl hydrocarbon group.
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) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |