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US4444566A
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Stabilized middle distillate fuel composition
Assignee: Texaco Inc
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Filing: 1982-10-04
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Granted: 1984-04-24
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Expires: 2002-10-04
Abstract
Abstract A fuel composition comprising a mixture of hydrocarbons boiling in the middle distillate boiling range and an effective stabilizing amount of a alpha, omega diamino poly(oxypropylene) poly(oxyethylene) poly(oxypropylene) represented by the formula: ##STR1## wherein x and z each has an approximate value ranging from 1 to 3 such that the sum of x plus z has an average value ranging from 3 to 4, and y has an approximate value ranging from 10 to 16.
Inventors
- 👤 Wheeler C. Crawford
- 👤 William M. Sweeney
- 👤 Rodney L. Sung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A middle distillate fuel composition comprising a mixture of hydrocarbons boiling in the range from about 300° F. to about 750° F. and an effective sediment inhibiting amount of a alpha omega diamino poly(oxypropylene) poly(oxyethylene) poly(oxypropylene) having the following formula: ##STR8## wherein x and z each has an approximate value ranging from 1 to 3 and the sum of x plus z ranges from 3 to 4 and y has an approximate value ranging from 10 to 16 and a solubilizing agent effective for solubilizing the diamino poly(oxyalkylene) in the hydrocarbon mixture comprising a C 1 to C 4 alkanol and an alkylated benzene having one or two alkyl substituents wherein the alkyl substituents has from 1 to 2 carbon atoms.
Claim 2
Dependent Claim
121 words
A middle distillate fuel composition comprising a mixture of hydrocarbons boiling in the range from about 300° F. to about 750° F. and an effective sediment inhibiting amount of a alpha omega diamino poly(oxypropylene) poly(oxyethylene) poly(oxypropylene) having the following formula: ##STR8## wherein x and z each has an approximate value ranging from 1 to 3 and the sum of x plus z ranges from 3 to 4 and y has an approximate value ranging from 10 to 16 and a solubilizing agent effective for solubilizing the diamino poly(oxyalkylene) in the hydrocarbon mixture comprising a C 1 to C 4 alkanol and an alkylated benzene having one or two alkyl substituents wherein the alkyl substituents has from 1 to 2 carbon atoms.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 wherein y has a value from about 12 to 15.
Claim 4
Dependent Claim
16 words
A composition according to claim 1 wherein y has a value from about 13 to 14.
Claim 5
Dependent Claim
20 words
A fuel composition according to claim 1 containing from about 0.0001 to 0.1 weight percent of said sediment inhibiting diamine.
Claim 6
Dependent Claim
22 words
A fuel composition according to claim 1 wherein said sediment inhibiting diamine is present in from about 0.005 to 0.05 weight percent.
Claim 7
Dependent Claim
19 words
A fuel composition according to claim 1 wherein the sediment inhibiting diamine is present in about 0.01 weight percent.
Claim 8
Dependent Claim
17 words
A fuel composition according to claim 1, wherein the C 1 to C 4 alkanol is ethanol.
Claim 9
Dependent Claim
15 words
A fuel composition according to claim 1 wherein the alkyl substituted benzene compound is xylene.
Claim 10
Dependent Claim
15 words
A fuel composition according to claim 1 wherein the alkyl substituted benzene compound is toluene.
Claim 11
Dependent Claim
122 words
A middle distillate fuel composition comprising a mixture of hydrocarbons boiling in the range from about 300° F. to about 750° F. and 0.0095 weight percent based on the total fuel composition of a alpha omega diamino poly(oxypropylene) poly(oxyethylene) poly(oxypropylene) having the following formula: ##STR9## wherein x and z each has an approximate value of 1 to 3 such that the sum of x plus z is approximately 3.5 and y has an approximate value of 13.5, and a solubilizing agent effective for solubilizing the diamino poly(oxyalkylene) stabilizer in the hydrocarbon mixture comprising ethanol and xylene wherein the ethanol component is 2 weight percent of the base fuel composition and the xylene component is 2 weight percent of the base fuel composition.
Claim 12
Dependent Claim
122 words
A middle distillate fuel composition comprising a mixture of hydrocarbons boiling in the range from about 300° F. to about 750° F. and 0.0095 weight percent based on the total fuel composition of a alpha omega diamino poly(oxypropylene) poly(oxyethylene) poly(oxypropylene) having the following formula: ##STR9## wherein x and z each has an approximate value of 1 to 3 such that the sum of x plus z is approximately 3.5 and y has an approximate value of 13.5, and a solubilizing agent effective for solubilizing the diamino poly(oxyalkylene) stabilizer in the hydrocarbon mixture comprising ethanol and xylene wherein the ethanol component is 2 weight percent of the base fuel composition and the xylene component is 2 weight percent of the base fuel composition.
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) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |