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US4251233A
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Liquid hydrocarbon-soluble rare earth chelates prepared from the novel ligand 2,2,7-trimethyl-3,5-octanedione and fuels containing same
Assignee: University Patents Inc
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Filing: 1979-03-05
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Granted: 1981-02-17
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Expires: 1999-03-05
Abstract
Abstract Liquid hydrocarbon-soluble rare earth chelates prepared from the novel ligand 2,2,7-trimethyl-3,5-octanedione when dissolved in fuels such as gasoline and diesel oil prevent formation and/or effect removal of carbonaceous deposits during the combustion thereof. The use of fuels containing these chelates promotes more efficient operations of devices such as internal combustion engines in which the fuels are burned by minimizing or eliminating the accumulation of harmful carbonaceous materials in the combustion chambers and by preventing knocking and/or other undesirable performance characteristics.
Inventors
- 👤 Robert E. Sievers
- 👤 Thomas J. Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:59
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C07; C07C; C07C45/00; C07C45/45; C07C45/455; C07C45/77; C07C49/00; C07C49/04; C07C49/12; C07C49/92; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/1814; C10L10/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
16 words
A liquid hydrocarbon-soluble rare earth metal chelate in which the ligand is 2,2,7-trimethyl-3,5-octanedione, and mixtures thereof.
Claim 2
Dependent Claim
16 words
A liquid hydrocarbon-soluble rare earth metal chelate in which the ligand is 2,2,7-trimethyl-3,5-octanedione, and mixtures thereof.
Claim 3
Dependent Claim
41 words
The rare earth metal chelate or chelate mixture of claim 1 in which the rare earth metal is selected from the group consisting of lanthanum, cerium, praeseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.
Claim 4
Dependent Claim
24 words
A concentrate comprising an organic solvent containing at least 1% by weight of a rare earth metal chelate or chelate mixture of claim 1.
Claim 5
Dependent Claim
22 words
A liquid hydrocarbon fuel containing a combustion deposit modifying amount of a rare earth metal chelate or chelate mixture of claim 1.
Claim 6
Dependent Claim
12 words
The liquid hydrocarbon fuel of claim 4 wherein the fuel is gasoline.
Claim 7
Dependent Claim
27 words
The liquid hydrocarbon fuel of claim 5 wherein the gasoline contains from about 0.001 to about 50 millimoles rare earth metal chelate or chelate mixture per gallon.
Claim 8
Dependent Claim
54 words
A liquid hydrocarbon-soluble rare earth metal chelate or chelate mixture consisting essentially of a complex of the general formula; ##STR7## in which M is a rare earth element or a mixture thereof, Y is water or an organic compound containing a donor group, a is 0 to 4 and x is 1 to 4.
Claim 9
Dependent Claim
54 words
A liquid hydrocarbon-soluble rare earth metal chelate or chelate mixture consisting essentially of a complex of the general formula; ##STR7## in which M is a rare earth element or a mixture thereof, Y is water or an organic compound containing a donor group, a is 0 to 4 and x is 1 to 4.
Claim 10
Dependent Claim
41 words
The rare earth metal chelate or chelate mixture of claim 7 in which the rare earth metal is selected from the group consisting of lanthanum, cerium, praeseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium.
Claim 11
Dependent Claim
23 words
A concentrate comprising an organic solvent containing at least 1% by weight of rare earth metal chelate or chelate mixture of claim 7.
Claim 12
Dependent Claim
22 words
A liquid hydrocarbon fuel containing a combustion deposit modifying amount of a rare earth metal chelate or chelate mixture of claim 7.
Claim 13
Dependent Claim
12 words
The liquid hydrocarbon fuel of claim 10 wherein the fuel is gasoline.
References Cited (Backward Citations)
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |