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US4367152A
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Selected heteroaromatic nitrogen compounds as antioxidant/metal deactivators/electrical insulators in lubricating oils and petroleum liquid fuels
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-07-02
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Granted: 1983-01-04
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Expires: 2001-07-02
Abstract
Abstract A hydrocarbon composition such as a lubricating or specialty oil containing a selected heteroaromatic nitrogen compound as an antioxidant/metal deactivator/electrical insulator having the following general formula: ##STR1## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR"' 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR"' OR "' or NR"' 2 with each R"' being H or alkyl of 1 to 20 carbons.
Inventors
- 👤 Peter G. Wright
- 👤 John M. Macdonald
- 👤 Gerald A. MacAlpine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:35
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/24; C10L1/2443; C10M; C10M133/00; C10M133/02; C10M133/38; C10M133/44; C10M135/00; C10M135/32; H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/09; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A hydrocarbon composition comprising a basestock of hydrocarbon oil of lubricating viscosity or a petroleum liquid fuel and effective inhibitor amount of an antioxidant/metal deactivator/electrical insulator of the formula: ##STR3## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR" 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR'", OR'" or NR'" 2 with each R'" being H or alkyl of 1 to 20 carbons.
Claim 2
Dependent Claim
89 words
A hydrocarbon composition comprising a basestock of hydrocarbon oil of lubricating viscosity or a petroleum liquid fuel and effective inhibitor amount of an antioxidant/metal deactivator/electrical insulator of the formula: ##STR3## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR" 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR'", OR'" or NR'" 2 with each R'" being H or alkyl of 1 to 20 carbons.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.0001 to about 1.0 percent by weight based on the total weight of the composition.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein both X groups are N.
Claim 5
Dependent Claim
9 words
The composition of claim 3 wherein Y is C.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein said basestock is a mineral oil.
Claim 7
Dependent Claim
24 words
The composition of claim 5 wherein said composition is an electrical insulating oil additionally containing a small additive amount of 2,6-ditertiary butyl para cresol.
Claim 8
Dependent Claim
25 words
The composition of claim 5 wherein said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.001 to about 0.05 percent by weight.
Claim 9
Dependent Claim
19 words
The composition of claim 6 wherein the alkyl groups in R" and R'" contain 8 to 16 carbon atoms.
Claim 10
Dependent Claim
29 words
The composition of claim 2 wherein said antioxidant/metal deactivator/electrical insulator is selected from the group consisting of purine, 6-aminopurine, 4-azabenzimidazole, 8-azaadenine, 6-octylthiopurine, 6-decylthiopurine, 9-diethylaminomethylpurine, 9-dibutylaminomethylpurine, 9-dioctylaminomethyl purine and 9-didodecylaminomethylpurine.
Claim 11
Dependent Claim
32 words
The composition of claim 8 wherein said basestock is a mineral oil and said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.001 to about 0.05 percent by weight.
Claim 12
Dependent Claim
24 words
The composition of claim 9 wherein said composition is an electrical insulating oil additionally containing a small additive amount of 2,6-ditertiary butyl para cresol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |