US4643666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of burning hydrogen deficient fuels
Assignee: Mobil Oil AS
•
Filing: 1984-10-09
•
Granted: 1987-02-17
•
Expires: 2004-10-09
Abstract
Abstract The burning characteristics of a relatively hydrogen deficient fuel are improved by physically mixing with, but not dissolving in, the fuel a light hydrogen rich vapor, such as hydrogen and/or methane, ethane, etc.
Inventors
- 👤 Gary J. Green
- 👤 Harry A. McVeigh
- 👤 Joe E. Penick
- 👤 Tsoung Y. Yan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:08
CPC Classifications
C; C10; C10L; C10L1/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
A process for reducing the sooting tendencies of a relatively hydrogen-deficient heavy liquid hydrocarbon fuel comprising physically mixing said fuel with a hydrogen-rich gas selected from the group of hydrogen, methane, ethane, ethylene, propane, propylene, butane, isobutane, isobutylene, and mixtures thereof, at conditions wherein a majority of said hydrogen-rich gas remains in vapor phase, and the resulting mixture of fuel and gas are burned.
Claim 2
Dependent Claim
64 words
A process for reducing the sooting tendencies of a relatively hydrogen-deficient heavy liquid hydrocarbon fuel comprising physically mixing said fuel with a hydrogen-rich gas selected from the group of hydrogen, methane, ethane, ethylene, propane, propylene, butane, isobutane, isobutylene, and mixtures thereof, at conditions wherein a majority of said hydrogen-rich gas remains in vapor phase, and the resulting mixture of fuel and gas are burned.
Claim 3
Dependent Claim
23 words
Process of claim 1 wherein said gas is selected from the group consisting of hydrogen, natural gas, methane, ethane, ethylene, and mixtures thereof.
Claim 4
Dependent Claim
28 words
Process of claim 1 wherein said hydrogen rich fuel is a light hydrocarbon gas selected from the group consisting of natural gas, methane, ethane, ethylene and mixtures thereof.
Claim 5
Dependent Claim
22 words
Process of claim 1 wherein said gas is added in an amount equal to 0.5 to 50 wt% of said heavy fuel.
Claim 6
Dependent Claim
22 words
Process of claim 1 wherein said gas is added in an amount equal to 1 to 20 wt% of said heavy fuel.
Claim 7
Dependent Claim
25 words
Process of claim 1 wherein said hydrogen deficient fuel is selected from the group of residual fuel, coal liquids and oil derived from tar sands.
Claim 8
Dependent Claim
17 words
Process of claim 1 wherein said hydrogen deficient fuel has a hydrogen content not exceeding 13 wt%.
Claim 9
Dependent Claim
18 words
Process of claim 1 wherein said hydrogen deficient fuel has a hydrogen content of 10 to 13 wt%.
Claim 10
Dependent Claim
35 words
Process of claim 1 wherein said hydrogen rich fuel is a refinery offgas and at least a molar majority of said gas, on an inert free molar basis, is methane, ethane, ethylene, and mixtures thereof.
Claim 11
Dependent Claim
35 words
Process of claim 1 wherein said hydrogen rich fuel is a refinery offgas and at least a molar majority of said gas, on an inert free molar basis, is methane, ethane, ethylene, and mixtures thereof.
Claim 12
Dependent Claim
19 words
The process of claim 1, wherein said hydrogen deficient fuel is atomized to charge said fuel into a burner.
Claim 13
Dependent Claim
51 words
A process for improving the burning characteristics of a fuel which is relatively deficient in hydrogen and has a tendency to form soot upon combustion, comprising physically admixing methane with said hydrogen deficient fuel prior to combustion, wherein a majority of said methane is not dissolved in said hydrogen deficient fuel.
Claim 14
Dependent Claim
51 words
A process for improving the burning characteristics of a fuel which is relatively deficient in hydrogen and has a tendency to form soot upon combustion, comprising physically admixing methane with said hydrogen deficient fuel prior to combustion, wherein a majority of said methane is not dissolved in said hydrogen deficient fuel.
Claim 15
Dependent Claim
31 words
The process of claim 12, wherein said methane is admixed with a gas selected from the group consisting of hydrogen, ethane, ethylene, propane, propylene, normal butane, isobutane, isobutylene, and mixtures thereof.
Claim 16
Dependent Claim
24 words
The process of claim 12, wherein said methane is added in an amount equal to 0.5 to 50 wt% of said hydrogen deficient fuel.
Claim 17
Dependent Claim
24 words
The process of claim 12, wherein said methane is added in an amount equal to 1 to 20 wt% of said hydrogen deficient fuel.
Claim 18
Dependent Claim
27 words
The process of claim 12, wherein said hydrogen deficient fuel is selected from the group consisting of residual fuel, coal liquids and oil derived from tar sands.
Claim 19
Dependent Claim
18 words
The process of claim 12, wherein said hydrogen deficient fuel has a hydrogen content not exceeding 13 wt%.
Claim 20
Dependent Claim
19 words
The process of claim 12, wherein said hydrogen deficient fuel has a hydrogen content of 10 to 13 wt%.
Claim 21
Dependent Claim
18 words
The process of claim 12, wherein the sooting tendencies of the fuel relatively deficient in hydrogen is reduced.
References Cited (Backward Citations)
US2866693A
Cited
GB840351A
Cited
US3672853A
Cited
US4017268A
Cited
US4045189A
Cited
DD134365A1
Cited
US4197081A
Cited
JPS5778491A
Cited
US4490152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |