US4265639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion catalysts
Assignee: Individual
•
Filing: 1980-03-20
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Granted: 1981-05-05
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Expires: 2000-03-20
Abstract
Abstract The present invention relates to a stabilized, combustion promoting fuel additive containing an iron (II) chelate and a picric acid/organic base complex. The invention further relates to stock solutions containing this additive, methods for producing the additive and fuels containing the additive.
Inventors
- 👤 Myndert T. Scholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/02; C07F15/025; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
58 words
A stabilized fuel additive consisting essentially of (i) an iron (II)/EDTA chelate and (ii) a complex of picric acid with at least one amine of the formula ##STR2## wherein R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 2
Dependent Claim
58 words
A stabilized fuel additive consisting essentially of (i) an iron (II)/EDTA chelate and (ii) a complex of picric acid with at least one amine of the formula ##STR2## wherein R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 3
Dependent Claim
112 words
In a fuel additive comprising (i) iron in the +2 valence state and (ii) picric acid, the improvement wherein said additive further comprises (iii) a chelating amount of EDTA sufficient to form an iron (II)/EDTA chelate with essentially all of the +2 iron present in said additive and (iv) a complexing amount of at least one amine sufficient to form picric acid/amine complex with essentially all of the picric acid present in said additive, wherein said amine is of the formula ##STR3## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 4
Dependent Claim
112 words
In a fuel additive comprising (i) iron in the +2 valence state and (ii) picric acid, the improvement wherein said additive further comprises (iii) a chelating amount of EDTA sufficient to form an iron (II)/EDTA chelate with essentially all of the +2 iron present in said additive and (iv) a complexing amount of at least one amine sufficient to form picric acid/amine complex with essentially all of the picric acid present in said additive, wherein said amine is of the formula ##STR3## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 5
Dependent Claim
35 words
An additive according to claim 2, wherein said hydrocarbyl groups represented by R 1 , R 2 and R 3 have 2 to 8 carbon atoms, and said amine has 3 to 12 carbon atoms.
Claim 6
Dependent Claim
31 words
An additive according to claim 2, wherein the molar ratio of said EDTA to iron is approximately 1:1 and the molar ratio of said amine to picric acid is approximately 1:1.
Claim 7
Dependent Claim
104 words
A fuel additive solution comprising (i) about 0.01 to about 0.20 g of iron in the +2 valence state per liter of said solution, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; (iv) a complexing amount of at least one amine of the formula ##STR4## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms; and (v) organic solvent which is compatible with said additive.
Claim 8
Dependent Claim
104 words
A fuel additive solution comprising (i) about 0.01 to about 0.20 g of iron in the +2 valence state per liter of said solution, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; (iv) a complexing amount of at least one amine of the formula ##STR4## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms; and (v) organic solvent which is compatible with said additive.
Claim 9
Dependent Claim
25 words
A solution according to claim 5, wherein said amine is selected from the group consisting of cyclohexylamine, 2-ethylhexylamine, n-butylamine, n-propylamine, triethylamine, diethylamine, dicyclohexylamine and aniline.
Claim 10
Independent Claim
147 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR5## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding picric acid to methanol to make a solution of picric acid in methanol; (iii) adding a +2 iron source to said picric acid solution of step (ii) with stirring to obtain a green iron (II) picrate solution; and (iv) adding portions of said solution (i) to said green iron (II) picrate solution of step (iii) with agitation until the green color disappears and a clear yellow solution is obtained.
Claim 11
Independent Claim
147 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR5## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding picric acid to methanol to make a solution of picric acid in methanol; (iii) adding a +2 iron source to said picric acid solution of step (ii) with stirring to obtain a green iron (II) picrate solution; and (iv) adding portions of said solution (i) to said green iron (II) picrate solution of step (iii) with agitation until the green color disappears and a clear yellow solution is obtained.
Claim 12
Independent Claim
136 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR6## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding picric acid to methanol to make a solution of picric acid in methanol; (iii) adding said picric acid solution of step (ii) to said solution of step (i); and (iv) adding a +2 iron source to said solution of step (iii) with stirring to give a red orange solution which on standing goes to a clear yellow solution.
Claim 13
Independent Claim
136 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR6## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding picric acid to methanol to make a solution of picric acid in methanol; (iii) adding said picric acid solution of step (ii) to said solution of step (i); and (iv) adding a +2 iron source to said solution of step (iii) with stirring to give a red orange solution which on standing goes to a clear yellow solution.
Claim 14
Independent Claim
115 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR7## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding a +2 iron source to said solution of step (i) with stirring to get a chelated iron solution; and (iii) adding a picric acid/methanol solution to said solution of step (ii) to get a clear yellow solution.
Claim 15
Independent Claim
115 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR7## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA and said amine in a methanol solution; (ii) adding a +2 iron source to said solution of step (i) with stirring to get a chelated iron solution; and (iii) adding a picric acid/methanol solution to said solution of step (ii) to get a clear yellow solution.
Claim 16
Independent Claim
134 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR8## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA said amine in a methanol solution; (ii) adding picric acid to the solution of step (i) and dissolving; (iii) adding a source of +2 iron to the solution of step (ii) and stirring to suspend and dissolve to give a red orange solution; and (iv) adding isopropyl alcohol to the solution of step (iii) to obtain a clear orange solution which goes yellow upon standing.
Claim 17
Independent Claim
134 words
A method for preparing a fuel additive comprising (a) an iron (II)/EDTA chelate and (b) a complex of picric acid with at least one amine of the formula ##STR8## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms, said method comprising the steps of: (i) combining said EDTA said amine in a methanol solution; (ii) adding picric acid to the solution of step (i) and dissolving; (iii) adding a source of +2 iron to the solution of step (ii) and stirring to suspend and dissolve to give a red orange solution; and (iv) adding isopropyl alcohol to the solution of step (iii) to obtain a clear orange solution which goes yellow upon standing.
Claim 18
Dependent Claim
12 words
A fuel comprising the additive of claims 1, 2, 3, or 4.
Claim 19
Dependent Claim
11 words
Gasoline comprising the additive of claims 1, 2, 3, or 4.
Claim 20
Dependent Claim
12 words
Diesel fuel comprising the additive of claims 1, 2, 3, or 4.
Claim 21
Dependent Claim
87 words
Gasoline comprising (i) about 0.005 to about 0.20 mg of iron per liter of said gasoline, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; and (iv) a complexing amount of at least one amine of the formula ##STR9## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 22
Dependent Claim
87 words
Gasoline comprising (i) about 0.005 to about 0.20 mg of iron per liter of said gasoline, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; and (iv) a complexing amount of at least one amine of the formula ##STR9## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 23
Dependent Claim
90 words
Diesel fuel comprising (i) about 0.005 to about 0.20 mg of iron per U.S. gallon of said diesel fuel, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; and (iv) a complexing amount of at least one amine of the formula ##STR10## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
Claim 24
Dependent Claim
90 words
Diesel fuel comprising (i) about 0.005 to about 0.20 mg of iron per U.S. gallon of said diesel fuel, (ii) picric acid, wherein the molar ratio of said picric acid to said iron is from about 2:1 to about 550:1; (iii) a chelating amount of EDTA; and (iv) a complexing amount of at least one amine of the formula ##STR10## where R 1 , R 2 and R 3 are hydrocarbyl groups having 1 to 12 carbon atoms, or hydrogen, provided that said amine has at least 3 carbon atoms.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |