US4978366A
Expired / Lapsed
US
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Distillate fuels stabilized with diaminomethane and method thereof
Assignee: Baker Hughes Holdings LLC
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Filing: 1988-01-14
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Granted: 1990-12-18
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Expires: 2008-01-14
Abstract
Abstract A distillate fuel, particularly one which has a high acid number initially or which develops a high acid number as a result of fuel degradation, stabilized with a diaminomethane of the formula: ##STR1## wherein R 1 , R 2 , R 3 and R 4 may be independently a saturated or unsaturated hydrocarbon group, e.g., alkyl, aryl, aralkyl, alkaryl, cycloalkyl, alkenyl, aralkenyl, alkenylaryl, cycloalkenyl and the like or heterocyclyl groups and in which R 1 and R 2 and/or R 3 and R 4 may be joined together to form a five or six member heterocyclyl ring and R 5 may be hydrogen or lower alkyl is disclosed. A method of stabilizing a fuel oil wherein a stabilizing amount of the above-mentioned diaminomethane is incorporated into the fuel oil is also disclosed.
Inventors
- 👤 Jerry J. Weers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:52
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/223; C10L1/232; C10L1/233; C10L1/2335; C10L1/24; C10L1/2443; C10L1/2456
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
114 words
A fuel oil comprising a distillate fuel oil having incorporated therein a diaminomethane of the formula ##STR6## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and five or six member heterocyclic groups wherein R 1 with R 2 or both R 1 and R 2 and R 3 with R 4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and wherein R 5 is a member selected from the group consisting of hydrogen and lower alkyl in an mount effective to increase color stability or resistance to sedimentation of said fuel oil.
Claim 2
Dependent Claim
114 words
A fuel oil comprising a distillate fuel oil having incorporated therein a diaminomethane of the formula ##STR6## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and five or six member heterocyclic groups wherein R 1 with R 2 or both R 1 and R 2 and R 3 with R 4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and wherein R 5 is a member selected from the group consisting of hydrogen and lower alkyl in an mount effective to increase color stability or resistance to sedimentation of said fuel oil.
Claim 3
Dependent Claim
32 words
A distillate fuel oil of claim 1 wherein R 1 , R 2 , R 3 and R 4 are alkyl or alkenyl groups containing from about 3 to 5 carbon atoms.
Claim 4
Dependent Claim
76 words
The distillate fuel oil of claim 1 wherein R 1 with R 2 or both R 1 with R 2 and R 3 with R 4 are ethylene groups joined to form a heterocyclic structure including a hetero atom selected from the group consisting of N, O, and S in addition to the N in which R 1 with R 2 or both R 1 with R 2 and R 3 with R 4 are joined.
Claim 5
Dependent Claim
14 words
The distillate fuel oil of claim 1 wherein diaminomethanes are present as a mixture.
Claim 6
Dependent Claim
12 words
The distillate fuel oil of claim 1 wherein R 5 is hydrogen.
Claim 7
Dependent Claim
20 words
The distillate fuel oil of claim 1 wherein the fuel oil is a No. 1, 2 or 3 fuel oil.
Claim 8
Dependent Claim
18 words
The distillate fuel oil of claim 1 wherein the fuel is a No. 4 or 6 fuel oil.
Claim 9
Dependent Claim
17 words
A distillate fuel oil of claim 1 wherein the diaminomethane is the condensate of formaldehyde and morpholine.
Claim 10
Dependent Claim
17 words
A distillate fuel oil of claim 1 wherein the diaminomethane is the condensate of formaldehyde and di-n-butylamine.
Claim 11
Dependent Claim
17 words
A distillate fuel oil of claim 1 wherein the diaminomethane is the condensate of formaldehyde and 2,6-dimethylpiperidine.
Claim 12
Dependent Claim
17 words
A distillate fuel oil of claim 1 wherein the diaminomethane is the condensate of formaldehyde and N-ethylcyclohexylamine.
Claim 13
Independent Claim
114 words
A method of treating a distillate fuel oil which comprises incorporating therein a diaminomethane of the formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and five or six member heterocyclic groups wherein R 1 with R 2 or both R 1 with R 2 and R 3 with R 4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and wherein R 5 is a member selected from the group consisting of hydrogen and lower alkyl in an amount effective to increase color stability or resistance to sedimentation of said fuel.
Claim 14
Independent Claim
114 words
A method of treating a distillate fuel oil which comprises incorporating therein a diaminomethane of the formula ##STR7## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, cycloalkyl, alkenyl, cycloalkenyl and five or six member heterocyclic groups wherein R 1 with R 2 or both R 1 with R 2 and R 3 with R 4 are alkylene groups joined together with their adjacent N to form a heterocyclic ring and wherein R 5 is a member selected from the group consisting of hydrogen and lower alkyl in an amount effective to increase color stability or resistance to sedimentation of said fuel.
Claim 15
Dependent Claim
30 words
The method of claim 12 wherein R 1 , R 2 , R 3 and R 4 are alky or alkenyl groups consisting from about 3 to 5 carbon atoms.
Claim 16
Dependent Claim
74 words
The method of claim 12 wherein R 1 with R 2 or both R 1 with R 2 and R 3 with R 4 are ethylene groups joined to form a heterocyclic structure including a hetero atom selected from the group consisting of N, O, and S in addition to the N to which R 1 and R 2 or both R 1 and R 2 and R 3 and R 4 are joined.
Claim 17
Dependent Claim
12 words
The method of claim 12 wherein diaminomethanes are present as a mixture.
Claim 18
Dependent Claim
10 words
The method of claim 12 wherein R 5 is hydrogen.
Claim 19
Dependent Claim
18 words
The method of claim 12 wherein the fuel oil is a No. 1, 2 or 3 fuel oil.
Claim 20
Dependent Claim
17 words
The method of claim 12 wherein the fuel oil is a No. 4 or 6 fuel oil.
Claim 21
Dependent Claim
15 words
The method of claim 12 wherein the diaminomethane is the condensate of formaldehyde and morpholine.
Claim 22
Dependent Claim
15 words
The method of claim 12 wherein the diaminomethane is the condensate of formaldehyde and di-n-butylamine.
Claim 23
Dependent Claim
15 words
The method of claim 12 wherein the diaminomethane is the condensate of formaldehyde and 2,6-dimethylpiperidine.
Claim 24
Dependent Claim
15 words
The method of claim 12 wherein the diaminomethane is the condensate of formaldehyde and N-ethylcyclohexylamine.
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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) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |