US4435185A
Expired / Lapsed
US
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Furnace fuel
Assignee: Horizon Chemical Inc
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Filing: 1979-10-01
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Granted: 1984-03-06
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Expires: 1999-10-01
Abstract
Abstract A significant improvement in the combustion properties of liquid hydrocarbon furnace fuel, perceived as a marked reduction in the rate and quantity of tarry, cokelike deposits formed on combustion of the fuel in conventional burner equipment, is obtained by adding to said fuel from about 1.0x10-6 to about 1.0x10-3 parts by weight of at least one isomer of dinitrotoluene. Optionally, combustion deposit formation can be further inhibited by the addition of at least one metal acetylacetonate to furnace fuel containing dinitrotoluene in the aforesaid amount.
Inventors
- 👤 Thomas C. Kenny
- 👤 John P. Plunkett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:57
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/1814; C10L1/22; C10L1/23; C10L1/231
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
36 words
A liquid hydrocarbon furnace fuel having improved combustion properties by the addition thereto as a combustion catalyst of from about 1.0×10 -6 to about 1.0×10 -3 parts by weight of at least one isomer of dinitrotoluene.
Claim 2
Dependent Claim
36 words
A liquid hydrocarbon furnace fuel having improved combustion properties by the addition thereto as a combustion catalyst of from about 1.0×10 -6 to about 1.0×10 -3 parts by weight of at least one isomer of dinitrotoluene.
Claim 3
Dependent Claim
25 words
The furnace fuel of claim 1 containing from about 1.5×10 -6 to about 1.0×10 -5 parts by weight of at least one isomer of dinitrotoluene.
Claim 4
Dependent Claim
10 words
The furnace fuel of claim 1 or 2 containg 2,4-dinitrotoluene.
Claim 5
Dependent Claim
18 words
The furnace fuel of claim 3 wherein the 2,4-dinitrotoluene is in admixture with a minor amount of 2,6-dinitrotoluene.
Claim 6
Dependent Claim
18 words
The furnace fuel of claim 1 containing a combustion deposit inhibiting amount of at least one metal acetylacetonate.
Claim 7
Dependent Claim
31 words
The furnace fuel of claim 5 containing the metal acetylacetonate in an amount of from about 1.5×10 -6 to about 1.0×10 -3 parts by weight per part by weight of fuel.
Claim 8
Dependent Claim
31 words
The furnace fuel of claim 6 containing the metal acetylacetonate in an amount of from about 1.5×10 -6 to about 1.0×10 -5 parts by weight per part by weight of fuel.
Claim 9
Dependent Claim
35 words
The fuel of claim 5 wherein the metal acetylacetonate is selected from the group consisting of nickel propionylacetonate, cobaltous propionylacetonate, cobaltic acetylacetonate, ferric acetylacetonate, cerous propionylacetonate, thorium acetylacetonate, zirconium acetylacetonate, chromic acetylacetonate and aluminum acetylacetonate.
Claim 10
Independent Claim
43 words
A method for operating a furnace which comprises adding to the liquid hydrocarbon fuel employed in the furnace, from about 1.0×10 -6 to about 1.0×10 -3 parts by weight of at least one isomer of dinitrotoluene as a combustion catalyst for said fuel.
Claim 11
Independent Claim
43 words
A method for operating a furnace which comprises adding to the liquid hydrocarbon fuel employed in the furnace, from about 1.0×10 -6 to about 1.0×10 -3 parts by weight of at least one isomer of dinitrotoluene as a combustion catalyst for said fuel.
Claim 12
Dependent Claim
29 words
The method of claim 9 wherein the liquid hydrocarbon fuel contains from about 1.5×10 -6 to about 1.0×10 -5 part by weight of at least one isomer of dinitrotoluene.
Claim 13
Dependent Claim
12 words
The method of claim 10 wherein the liquid hydrocarbon fuel contains 2,4-dinitrotoluene.
Claim 14
Dependent Claim
17 words
The method of claim 11 wherein the 2,4-dinitrotoluene is in admixture with a minor amount of 2,6-dinitrotoluene.
Claim 15
Dependent Claim
22 words
The method of claim 9 wherein the liquid hydrocarbon fuel contains a combustion deposit inhibiting amount of at least one metal acetylacetonate.
Claim 16
Dependent Claim
35 words
The method of claim 13 wherein the metal acetylacetonate is present in the fuel in an amount of from about 1.0×10 -6 to about 1.0×10 -3 parts by weight per part by weight of fuel.
Claim 17
Dependent Claim
35 words
The method of claim 14 wherein the metal acetylacetonate is present in the fuel in an amount of from about 1.5×10 -6 to about 1.0×10 -5 parts by weight per part by weight of fuel.
Claim 18
Dependent Claim
35 words
The fuel of claim 13 wherein the metal acetylacetonate is selected from the group consisting of nickel propionylacetonate, cobaltous propionylacetonate, cobaltic acetylacetonate, ferric acetylacetonate, cerous propionylacetonate, thorium acetylacetonate, zirconium acetylacetonate, chromic acetylacetonate and aluminum acetylacetonate.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |