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US4822378A
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Process and composition for color stabilized distillate fuel oils
Assignee: Veolia WTS USA Inc
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Filing: 1987-02-25
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Granted: 1989-04-18
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Expires: 2007-02-25
Abstract
Abstract This invention relates to processes and compositions for color stabilized distillate fuel oils which comprises an effective color stabilizing amount of (a) a tertiary amine having the formula ##STR1## wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula ##STR2## wherein R and R' are the same or different and are hydrogen, alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3. Preferably, the alkyl, alkaryl and aralkyl groups of the hydroxylamine have from one to about twenty carbon atoms. It is further preferred that (a) is N,N-dimethylcyclohexylamine and (b) is N,N-diethylhydroxylamine.
Inventors
- 👤 Dwight K. Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:48
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/23
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
89 words
A process for inhibiting color deterioration of distillate fuel oil which comprises adding to said fuel oil an effective inhibiting amount of a mixture of (a) a tertiary amine having the formula ##STR9## wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula ##STR10## wherein R and R' are the same or different and are hydrogen, alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3.
Claim 2
Dependent Claim
89 words
A process for inhibiting color deterioration of distillate fuel oil which comprises adding to said fuel oil an effective inhibiting amount of a mixture of (a) a tertiary amine having the formula ##STR9## wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula ##STR10## wherein R and R' are the same or different and are hydrogen, alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3.
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
22 words
The process of claim 1 wherein said mixture is added to said fuel oil prior to color deterioration of the fuel oil.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein said (a) tertiary amine is N,N-dimethylcyclohexylamine and said (b) hydroxylamine is N,N-dimethylhydroxylamine.
Claim 6
Dependent Claim
20 words
The process of claim 1 or 4 wherein the weight ratio of (a):(b) is from about 90:10 to about 99.7:0.3.
Claim 7
Dependent Claim
15 words
The process of claim 5 wherein the distillate fuel oil is a blended diesel fuel.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the weight ratio of (a):(b) is about 99.5:0.5.
Claim 9
Dependent Claim
28 words
The process of claim 7 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 10
Dependent Claim
82 words
A color stabilized distillate fuel oil composition comprising distillate fuel oil and an effective color stabilizing amount of (a) a tertiary amine having the formula ##STR11## wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula ##STR12## wherein R and R' are the same or different and are hydrogen, alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3.
Claim 11
Dependent Claim
82 words
A color stabilized distillate fuel oil composition comprising distillate fuel oil and an effective color stabilizing amount of (a) a tertiary amine having the formula ##STR11## wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula ##STR12## wherein R and R' are the same or different and are hydrogen, alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3.
Claim 12
Dependent Claim
29 words
The composition of claim 9 wherein the total amount of (a) and (b) is from about 1.0 part to about 10,000 parts per million parts of said fuel oil.
Claim 13
Dependent Claim
18 words
The composition of claim 9 wherein said (a) tertiary amine is N,N-dimethylcyclohexylamine and said (b) hydroxylamine is N,N-diethylhydroxylamine.
Claim 14
Dependent Claim
20 words
The composition of claim 9 or 11 wherein the weight ratio of (a):(b) is from about 90:10 to about 99.7:0.3.
Claim 15
Dependent Claim
15 words
The composition of claim 12 wherein the distillate fuel oil is a blended diesel fuel.
Claim 16
Dependent Claim
14 words
The composition of claim 13 wherein the weight ratio of (a):(b) is about 99.5:5:0.5.
Claim 17
Dependent Claim
29 words
The composition of claim 14 wherein the total amount of (a) and (b) is from about 1.0 part to about 1,500 parts per million parts of said diesel fuel.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |