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US4623409A
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Preparation of 1,1'-dinitro-3,3'-azo-1,2,4-triazole
Assignee: United States Department of Energy
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Filing: 1985-03-05
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Granted: 1986-11-18
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Expires: 2005-03-05
Abstract
Abstract A new high density composition of matter, 1,1'-dinitro-3,3'-azo-1,2,4-triazole, has been synthesized using inexpensive, commonly available compounds. This compound has been found to be an explosive, and its use as a propellant is anticipated.
Inventors
- 👤 Kien-yin Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:40
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/34
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
6 words
A propellant composition which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 2
Dependent Claim
6 words
A propellant composition which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 3
Dependent Claim
6 words
An explosive composition which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 4
Dependent Claim
6 words
An explosive composition which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 5
Independent Claim
31 words
A method of preparation for 1,1'-dinitro-3,3'-azo-1,2,4-triazole, said preparation comprising the steps of: a. oxidation of 3-amino-1,2,4-triazole starting material to form 3,3'-azo-1,2,4-triazole intermediate; b. nitrating said 3,3'-azo-1,2,4-triazole; and c. extracting the product.
Claim 6
Independent Claim
31 words
A method of preparation for 1,1'-dinitro-3,3'-azo-1,2,4-triazole, said preparation comprising the steps of: a. oxidation of 3-amino-1,2,4-triazole starting material to form 3,3'-azo-1,2,4-triazole intermediate; b. nitrating said 3,3'-azo-1,2,4-triazole; and c. extracting the product.
Claim 7
Dependent Claim
39 words
The method as described in claim 3, wherein said oxidation step is performed by addition of potassium permanganate to a first solution of the 3-amino-1,2,4-triazole in sodium hydroxide solution until the solution turns green forming thereby a second solution.
Claim 8
Dependent Claim
47 words
The method as described in claim 4, wherein the excess potassium permanganate in the second solution is reduced with sodium bisulfite, forming thereby a third solution, and wherein the 3,3'-azo-1,2,4-triazole intermediate is obtained as a precipitate by the addition of concentrated hydrochloric acid to the third solution.
Claim 9
Independent Claim
18 words
The method as described in claims 3 or 5, wherein said nitration step is performed using acetyl nitrate.
Claim 10
Independent Claim
53 words
The method as described in claims 3 or 5, wherein said nitration step is performed by the addition of the 3,3'-azo-1,2,4-triazole intermediate to a mixture of acetic anhydride and nitric acid, forming thereby a fourth solution, and wherein the fourth solution is mixed with ice water, thereby causing the 1,1'-dinitro-3,3'-azo-1,2,4-triazole product to precipitate.
Claim 11
Independent Claim
30 words
The method as described in claims 3 or 5, wherein said nitration step is performed by the addition of acetic anhydride to a solution of the 3,3'-azo-1,2,4-triazole in nitric acid.
Claim 12
Dependent Claim
7 words
A composition of matter which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 13
Dependent Claim
7 words
A composition of matter which comprises 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 14
Dependent Claim
9 words
A composition of matter which consists essentially of 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 15
Dependent Claim
9 words
A composition of matter which consists essentially of 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 16
Dependent Claim
8 words
An explosive composition which consists essentially of 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
Claim 17
Dependent Claim
8 words
An explosive composition which consists essentially of 1,1'-dinitro-3,3'-azo-1,2,4-triazole.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |