Claims
- 1. A gasoline fuel composition comprising a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with a molybdenum(VI) compound which is soluble in said hydrocarbon fuel, wherein the amount of said molybdenum(VI) compound is from about 0.1 to about 20.0 parts per one million parts of hydrocarbon fuel, said fuel composition is substantially free of metals other than molybdenum, and said molybdenum(VI) compound is selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI) diamine complexes wherein the diamine ligand is of the formula R.sup.4 R.sup.5 N--(CR.sup.4 R.sup.5).sub.n --NR.sup.4 R.sup.5 where n is an integer from 1 to 20 and each R.sup.4 and R.sup.5 is independently selected from the group consisting of hydrogen and alkyl of 1 to 20 carbon atoms, and molybdenum(VI) compounds which are free of nitrogen, sulfur, and phosphorus.
- 2. A gasoline fuel composition comprising a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with a molybdenum(VI) compound which is soluble in said hydrocarbon fuel, wherein the amount of said molybdenum(VI) compound is sufficient to provide from about 0.01 to about 10 parts of molybdenum per million parts of said hydrocarbon fuel, said fuel composition is substantially free of metals other than molybdenum, and said molybdenum(VI) compound is selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI) diamine complexes wherein the diamine ligand is of the formula R.sup.4 R.sup.5 N--(CR.sup.4 R.sup.5).sub.n --NR.sup.4 R.sup.5 where n is an integer from 1 to 20 and each R.sup.4 and R.sup.5 is independently selected from the group consisting of hydrogen and alkyl of 1 to 20 carbon atoms, and molybdenum(VI) compounds which are free of nitrogen, sulfur, and phosphorus.
- 3. A gasoline fuel composition comprising a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with a molybdenum(VI) compound which is soluble in said liquid hydrocarbon fuel, wherein the amount of said molybdenum(VI) compound is effective to reduce elevated steady state octane requirement in a spark ignition internal combustion engine, said fuel composition is substantially free of metals other than molybdenum, and said molybdenum(VI) compound is selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI) carboxylates, molybdenum(VI) salts of naphthenic acids, molybdenum(VI) phenates, molybdenum(VI) alkoxides, molybdenum(VI) aryloxides, molybdenum VI beta-diketone compounds, and molybdenum(VI) diamine complexes wherein the diamine ligand is of the formula R.sup.4 R.sup.5 N--(CR.sup.4 R.sup.5).sub.n --NR.sup.4 R.sup.5 where n is an integer from 1 to 20 and each R.sup.4 and R.sup.5 is independently selected from the group consisting of hydrogen and alkyl of 1 to 20 carbon atoms.
- 4. A composition as set forth in claim 3 wherein the amount of said molybdenum(VI) compound is sufficient to provide from about 10 to about 1,000 parts of molybdenum per million parts of said hydrocarbon fuel.
- 5. A composition as set forth in claim 2 wherein said molybdenum(VI) compound is a molybdenum(VI) beta-diketone complex.
- 6. A composition as set forth in claim 3 wherein said molybdenum(VI) compound is a molybdenum(VI) beta-diketone complex.
- 7. A composition as set forth in claim 1, 2, or 3 which additionally comprises a minor amount of methyl t-butyl ether which is effective to reduce knock in a spark ignition internal combustion engine.
- 8. A method for reducing elevated steady state octane requirement in a spark ignition internal combustion engine and maintaining the resulting reduced steady state octane requirement which comprises operating said engine on a first gasoline fuel composition until a reduced steady state octane requirement is achieved and maintaining said reduced steady state octane requirement by operating the engine on a second gasoline fuel composition, wherein said first fuel comprises a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with an amount of a soluble molybdenum(VI) compound which is sufficient to provide from about 10 to about 1,000 parts of molybdenum per million parts of liquid hydrocarbon fuel, wherein said second fuel comprises a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with an amount of a soluble molybdenum(VI) compound which is sufficient to provide from about 0.01 to about 10 parts of molybdenum per million parts of liquid hydrocarbon fuel, and wherein both of said first and second fuels are substantially free of lead, said molybdenum(VI) compound being selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI), diamine complexes wherein the diamine ligand is of the formula R.sup.4 R.sup.5 N--(CR.sup.4 R.sup.5).sub.n --NR.sup.4 R.sup.5 where n is an integer from 1 to 20 and each R.sup.4 and R.sup.5 is independently selected from the group consisting of hydrogen and alkyl of 1 to 20 carbon atoms, and molybdenum(VI) compounds which are free of nitrogen, sulfur, and phosphorus.
- 9. A method for suppressing octane requirement increase in a spark ignition internal combustion engine which comprises operating said engine with the gasoline fuel composition which is set forth in claim 1.
- 10. A method for reducing elevated steady state octane requirement in a spark ignition internal combustion engine which comprises operating said engine with the gasoline fuel composition which is set forth in claim 3.
- 11. A method for reducing elevated steady state octane requirement in a spark ignition internal combustion engine having an increased octane requirement of about 2 to about 7 units after operation with gasoline substantially free of lead and molybdenum which comprises operating said engine with a gasoline fuel composition comprising a major proportion of a liquid hydrocarbon fuel of gasoline boiling range in combination with a molybdenum(VI) compound which is soluble in said hydrocarbon fuel, wherein the amount of said molybdenum(VI) compound is sufficient to provide from about 10 to about 1,000 parts of molybdenum per million parts of said hydrocarbon fuel, and the amount of said gasoline fuel composition is effective to reduce said elevated steady state octane requirement by at least about 20%, said molybdenum(VI) compound being selected from the group consisting of molybdenum(VI) sulfonates, molybdenum(VI) diamine complexes wherein the diamine ligand is of the formula R.sup.4 R.sup.5 N--(CR.sup.4 R.sup.5).sub.n --NR.sup.4 R.sup.5 where n is an integer from 1 to 20 and each R.sup.4 and R.sup.5 is independently selected from the group consisting of hydrogen and alkyl of 1 to 20 carbon atoms, and molybdenum(VI) compounds which are free of nitrogen, sulfur, and phosphorus.
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of patent application Ser. No. 362,317, filed Mar. 26, 1985, now abandoned, which is a continuation-in-part of patent application Ser. No. 190,592, filed Sept. 25, 1980, now abandoned.
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3003859 |
Irish et al. |
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Continuations (1)
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Number |
Date |
Country |
Parent |
362317 |
Mar 1985 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
190592 |
Sep 1980 |
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