Liquid nitrate oxidizer compositions

• US 5,734,124 A
• Filed: 11/05/1990
• Issued: 03/31/1998
• Est. Priority Date: 12/20/1988
• Status: Expired due to Fees

• Current Assignee: Aerojet-General Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Aerojet-General Corporation (L3Harris Technologies, Inc.)
• Inventors: Oberth, Adolf Eduard, Clark, George Merrill, Bruenner, Rolf Sylvester, Katzakian, Arthur Jr.
• Primary Examiner(s): Miller, Edward A.
• Application Number:
  US07/616,571
• Time in Patent Office: 2,703 Days
• Field of Search: 149/36, 149/45, 149/46, 149/61, 149/19.1
• US Class Current: 149/36
• CPC Class Codes: C06B 21/005 By a process involving melting at least part of the ingredients
• CPC Class Codes: C06B 21/0058 by casting a curable composition, e.g. of the plastisol type
• CPC Class Codes: C06B 31/00 Compositions containing an inorganic nitrogen-oxygen salt
• CPC Class Codes: C06B 31/28 the salt being ammonium nitrate
• CPC Class Codes: C06B 47/00 Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
• CPC Class Codes: C06B 47/08 a component containing hydrazine or a hydrazine derivative

Abstract

Inorganic nitrate oxidizers are combined in novel eutectic compositions which place the oxidizers in liquid form at ambient temperatures. These liquid combinations are then used in the preparation of a wide variety of energetic formulations, notably solution and emulsion propellants.

Claims

1. An oxidizer composition consisting essentially of a liquid-phase mixture selected from the group consisting of

(i) ammonium nitrate and hydroxylammonium nitrate;

(ii) hydrazinium nitrate and hydroxylammonium nitrate;

(iii) ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate; and

(iv) ammonium nitrate, hydrazinium nitrate and lithium nitrate;

the components of each said mixture being in relative amounts such that the lowest temperature at which each said mixture is entirely liquid is within the range of about 30°

C. or below.

2. An oxidizer composition in accordance with claim 1 in which said liquid-phase mixture is a member selected from the group consisting of

(i) ammonium nitrate and hydroxylammonium nitrate;

(ii) hydrazinium nitrate and hydroxylammonium nitrate; and

(iii) ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate.

3. An oxidizer composition in accordance with claim 2 in which the lowest temperature at which each said mixture is entirely liquid is within the range of about 25°

C. or below.

4. An oxidizer composition in accordance with claim 2 in which the lowest temperature at which each said mixture is entirely liquid is within the range of about 20°

C. or below.

5. An oxidizer composition in accordance with claim 2 in which the lowest temperature at which each said mixture is entirely liquid is within the range of about 10°

C. or below.

6. An oxidizer composition in accordance with claim 1 further comprising a buffer and a sequestering agent in amounts sufficient to increase the exotherm peak temperature by at least about 100°

F.

7. An oxidizer composition in accordance with claim 1 in which said liquid-phase mixture is ammonium nitrate, hydrazinium nitrate and hydroxylammonium nitrate.

8. An oxidizer composition in accordance with claim 7 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 3 to about 62 parts ammonium nitrate and hydrazinium nitrate combined, and

about 35 to about 97 parts hydroxylammonium nitrate.

9. An oxidizer composition in accordance with claim 7 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 10 to about 30 parts ammonium nitrate,

about 30 to about 50 parts hydrazinium nitrate, and

about 30 to about 60 parts hydroxylammonium nitrate.

10. An oxidizer composition in accordance with claim 1 in which said liquid-phase mixture is ammonium nitrate and hydroxylammonium nitrate.

11. An oxidizer composition in accordance with claim 10 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 3 to about 35 parts ammonium nitrate, and

about 65 to about 97 parts hydroxylammonium nitrate.

12. An oxidizer composition in accordance with claim 10 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 25 to about 35 parts ammonium nitrate, and

about 65 to about 75 parts hydroxylammonium nitrate.

13. An oxidizer composition in accordance with claim 1 in which said liquid-phase mixture is hydrazinium nitrate and hydroxylammonium nitrate.

14. An oxidizer composition in accordance with claim 13 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 3 to about 55 parts hydrazinium nitrate, and

about 55 to about 97 parts hydroxylammonium nitrate.

15. An oxidizer composition in accordance with claim 13 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 25 to about 35 parts hydrazinium nitrate, and

about 65 to about 75 parts hydroxylammonium nitrate.

16. An oxidizer composition in accordance with claim 1 in which said liquid-phase mixture is ammonium nitrate, hydrazinium nitrate and lithium nitrate.

17. An oxidizer composition in accordance with claim 16 in which the lowest temperature at which each said mixture is entirely liquid is within the range of about 27°

C. to about 30°

C.

18. An oxidizer composition in accordance with claim 16 in which the composition of said liquid-phase mixture, in parts by weight based on 100 parts total, is:

about 31 to about 43 parts ammonium nitrate,

about 37.5 to about 51.5 parts hydrazinium nitrate, and

about 15.5 to about 21.5 parts lithium nitrate.