US4881994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron oxide catalyst propellant, and method for making same
Assignee: RTX Corp
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Filing: 1987-04-30
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Granted: 1989-11-21
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Expires: 2007-04-30
Abstract
Abstract A method of making a ferric oxide burning rate catalyst that results in a highly active, finely divided burning rate enhancing catalyst. An iron-containing compound that is capable of vaporization at a temperature below about 500° C. is vaporized. A mixture comprising the vaporized iron-containing compound is combusted with a gas that is capable of supporting combustion in an oxygen environment and does not condense below about 100° C. The ferric oxide burning rate catalyst made by this process is particulary adapted for use in a composite solid rocket propellant. This process provides an ultra pure, highly active, finely divided burning rate catalyst.
Inventors
- 👤 Thomas P. Rudy
- 👤 Forrest R. Goodson
- 👤 Mark E. Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/007; Y; Y10; Y10S; Y10S149/00; Y10S149/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method for making a ferric oxide burning rate enhancing catalyst particularly adapted for use in a rocket propellant comprising (a) vaporizing an iron-containing compound at a temperature below about 500° C.; and (b) combusting a mixture whereby ferric oxide particles are formed in suspension comprising (i) said vaporized iron-containing compound; and (ii) lower hydrocarbons, lower ethers or lower oxides of carbon; whereby the product is a highly active finely divided burning rate catalyst.
Claim 2
Independent Claim
74 words
A method for making a ferric oxide burning rate enhancing catalyst particularly adapted for use in a rocket propellant comprising (a) vaporizing an iron-containing compound at a temperature below about 500° C.; and (b) combusting a mixture whereby ferric oxide particles are formed in suspension comprising (i) said vaporized iron-containing compound; and (ii) lower hydrocarbons, lower ethers or lower oxides of carbon; whereby the product is a highly active finely divided burning rate catalyst.
Claim 3
Dependent Claim
20 words
The method as recited in claim 1 wherein said iron-containing compound has a melting point lower than its vaporization temperature.
Claim 4
Dependent Claim
41 words
The method as recited in claim 1 wherein said iron-containing compound is iron carbonyl, ferrocene or a derivative thereof, a iron chelate of a diketone of low molecular weight, a iron halide or a complex ferro- or ferricyanide, or mixtures thereof.
Claim 5
Dependent Claim
14 words
The method as recited in claim 1 wherein said iron-containing compound comprises iron pentacarbonyl.
Claim 6
Dependent Claim
16 words
The method as recited in claim 1 wherein said lower oxide of carbon is carbon monoxide.
Claim 7
Dependent Claim
18 words
A ferric oxide burning rate catalyst made by the process of claims 1, 2, 3, 4 or 5.
Claim 8
Dependent Claim
24 words
A composite solid rocket propellant comprising a ferric oxide burning rate catalyst made by the process of claims 1, 2, 3, 4 or 5.
References Cited (Backward Citations)
US3932242A
Cited
US4023994A
Cited
US3677839A
Cited
US4003850A
Cited
US4120709A
Cited
US4424085A
Cited
US4608239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-20 | 1993-05-22 | 1993-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-20 | 1997-05-22 | 1997-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-20 | 2001-05-22 | 2001-11-21 | $7700.00 | Window Closed / Lapsed |