US4854981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron oxide catalyst and method for making same
Assignee: RTX Corp
•
Filing: 1987-04-30
•
Granted: 1989-08-08
•
Expires: 2007-04-30
Abstract
Abstract A highly active, finely divided ferric oxide burning rate catalyst and method for making the same. The catalyst is made by vaporizing an iron-containing compound that is capable of vaporization at a temperature below about 500° C., and is capable of forming ferric oxide when reacted with an oxygen-containing atmosphere at temperatures below about 500° C. The iron-containing compound is then oxidized in an oxygen-containing atmosphere. The ferric oxide burning rate catalyst made by this process is particularly adapted for use in a composite solid rocket propellant. This process provides an ultra pure, highly active, finely divided burning rate catalyst.
Inventors
- 👤 Forrest R. Goodson
- 👤 Mark E. Dudley
- 👤 Thomas P. Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J35/00; B01J35/40; B01J35/45; C; C06; C06B; C06B23/00; C06B23/007; Y; Y10; Y10S; Y10S149/00; Y10S149/11
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
20 words
A ferric oxide burning rate catalyst comprising ferric oxide particles having an average particle size less than about 100 Å.
Claim 2
Dependent Claim
20 words
A ferric oxide burning rate catalyst comprising ferric oxide particles having an average particle size less than about 100 Å.
Claim 3
Dependent Claim
19 words
A composite solid rocket propellant comprising ferric oxide particles having an average particle size less than about 100 Å.
Claim 4
Dependent Claim
19 words
A composite solid rocket propellant comprising ferric oxide particles having an average particle size less than about 100 Å.
Claim 5
Independent Claim
93 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 that (i) is capable of being vaporized below about 500° C.; and (ii) is capable of forming ferric oxide when reacted with an oxygen-containing atmosphere at temperatures below about 500° C.; and (b) oxidizing said vaporized iron-containing compound in an oxygen environment wherein ferric oxide particles are formed, suspended in the oxygen environment; whereby the ferric oxide catalyst particle size is less than 100A resulting in improved activity.
Claim 6
Independent Claim
93 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 that (i) is capable of being vaporized below about 500° C.; and (ii) is capable of forming ferric oxide when reacted with an oxygen-containing atmosphere at temperatures below about 500° C.; and (b) oxidizing said vaporized iron-containing compound in an oxygen environment wherein ferric oxide particles are formed, suspended in the oxygen environment; whereby the ferric oxide catalyst particle size is less than 100A resulting in improved activity.
Claim 7
Dependent Claim
22 words
A method as recited in claim 3 wherein the iron-containing compound is carbonyls, chelates of beta diketones, complex cyanides or ferrocene derivatives.
Claim 8
Dependent Claim
15 words
The method as recited in claim 3 wherein the iron containing compound is iron pentacarbonyl.
Claim 9
Dependent Claim
24 words
The method as recited in claim 5 wherein said iron pentacarbonyl is oxidized at a temperature between about 157° C. and about 1371° C.
Claim 10
Dependent Claim
23 words
The method as recited in claim 5 wherein said iron pentacarbonyl is oxidized at a temperature between about 204° C. and 500° C.
Claim 11
Dependent Claim
13 words
A ferric oxide burning rate catalyst made by the process of claim 3.
Claim 12
Dependent Claim
15 words
A composite solid rocket propellant comprising ferric oxide made by the process of claim 3.
Claim 13
Dependent Claim
16 words
The catalyst as recited in claim 1 wherein the particle size is less than about 50A.
Claim 14
Dependent Claim
17 words
The rocket propellant as recited in claim 2 wherein the particle size is less than about 50A.
Claim 15
Dependent Claim
19 words
The method as recited in claim 3 wherein the ferric oxide catalyst particle size is less than about 50A.
Claim 16
Dependent Claim
15 words
The method as recited in claim 12 wherein said iron containing compound is iron pentacarbonyl.
Claim 17
Dependent Claim
24 words
The method as recited in claim 13 wherein sand iron pentacarbonyl is oxidized at a temperature between about 204° C. and about 500° C.
Claim 18
Dependent Claim
13 words
The ferric oxide burning rate catalyst made by the process of claim 14.
Claim 19
Dependent Claim
15 words
A composite solid rocket propellant comprising ferric oxide made by the process of claim 14.
References Cited (Backward Citations)
US3932242A
Cited
US4023994A
Cited
US3677839A
Cited
US4003850A
Cited
US4120709A
Cited
US4006090A
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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |