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US4648885A
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Process and composition for stabilized distillate fuel oils
Assignee: Veolia WTS USA Inc
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Filing: 1986-06-13
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Granted: 1987-03-10
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Expires: 2006-06-13
Abstract
Abstract This invention relates to processes and compositions for stabilized distillate fuel oils, such as straight-run diesel fuel, which comprise an effective stabilizing amount of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine.
Inventors
- 👤 Dwight K. Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:25
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10L1/232
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
29 words
A process for stabilizing distillate fuel oil which comprises adding to said fuel oil an effective stabilizing amount of a mixture of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine.
Claim 2
Dependent Claim
29 words
A process for stabilizing distillate fuel oil which comprises adding to said fuel oil an effective stabilizing amount of a mixture of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein said mixture is added in an amount from about 1.0 part to about 10,000 parts per million parts of said fuel oil.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said mixture is added at ambient temperature and pressure.
Claim 5
Dependent Claim
35 words
The process of claim 1 wherein the weight ratios of: (a):(b) is from about 1:3 to about 3:1, (a):(c) is from about 1:3 to about 3:1, and (b):(c) is from about 1:3 to about 3:1.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein the weight ratio of (a):(b):(c) is about 2:1.5:1.5.
Claim 7
Dependent Claim
30 words
The process of claim 4 or 5 wherein said mixture is added in an amount from about 1.0 part to about 1,500 parts per million parts of said fuel oil.
Claim 8
Dependent Claim
72 words
A process for inhibiting particulate formation and color deterioration of straight-run diesel fuel which comprises adding to said diesel fuel an effective amount of a mixture of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine, wherein the weight ratio of (a):(b) is from about 1:3 to about 3:1, the weight ratio of (a):(c) is from about 1:3 to about 3:1, and the weight ratio of (b):(c) is from about 1:3 to about 3:1.
Claim 9
Dependent Claim
72 words
A process for inhibiting particulate formation and color deterioration of straight-run diesel fuel which comprises adding to said diesel fuel an effective amount of a mixture of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine, wherein the weight ratio of (a):(b) is from about 1:3 to about 3:1, the weight ratio of (a):(c) is from about 1:3 to about 3:1, and the weight ratio of (b):(c) is from about 1:3 to about 3:1.
Claim 10
Dependent Claim
28 words
The process of claim 7 wherein said mixture is added in an amount from about 1.0 part to about 10,000 parts per million parts of said diesel fuel.
Claim 11
Dependent Claim
15 words
The process of claim 7 wherein said mixture is added at ambient temperature and pressure.
Claim 12
Dependent Claim
14 words
The process of claim 7 wherein the weight ratio of (a):(b):(c) is about 2:1.5:1.5.
Claim 13
Dependent Claim
30 words
The process of claim 8 or 10 wherein said mixture is added in an amount from about 1.0 part to about 1,500 parts per million parts of said diesel fuel.
Claim 14
Dependent Claim
23 words
A stabilized distillate fuel oil composition comprising distillate fuel oil and an effective stabilizing amount of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine.
Claim 15
Dependent Claim
23 words
A stabilized distillate fuel oil composition comprising distillate fuel oil and an effective stabilizing amount of (a) N-(2-aminoethyl)piperazine, (b) triethylenetetramine, and (c) N,N-diethylhydroxylamine.
Claim 16
Dependent Claim
30 words
The composition of claim 12 wherein the total amount of (a), (b), and (c) is from about 1.0 part to about 10,000 parts per million parts of said fuel oil.
Claim 17
Dependent Claim
35 words
The composition of claim 12 wherein the weight ratios of: (a):(b) is from about 1:3 to about 3:1, (a):(c) is from about 1:3 to about 3:1, and (b):(c) is from about 1:3 to about 3:1.
Claim 18
Dependent Claim
14 words
The composition of claim 14 wherein the distillate fuel oil is straight-run diesel fuel.
Claim 19
Dependent Claim
14 words
The composition of claim 15 wherein the weight ratio of (a):(b):(c) is about 2:1.5:1.5.
Claim 20
Dependent Claim
32 words
The composition of claim 15 or 16 wherein the total amount of (a), (b), and (c) is from about 1.0 part to about 1,500 parts per million parts of said diesel fuel.
References Cited (Backward Citations)
US2392881A
Cited
US2742349A
Cited
US3321404A
Cited
US3567824A
Cited
US4440625A
Cited
US4435564A
Cited
US4456526A
Cited
US4487987A
Cited
GB2157670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |