Process for manufacturing a gas generating material
First Claim
1. A process for manufacturing a gas generating material comprising the steps of:
- preparing a wet mixture of a metal azide and a metal oxide without prior mixing of the metal azide and metal oxide in dry form;
processing the wet mixture to form granules of gas generating material;
drying the granules of gas generating material; and
maintaining the mixture in a wet state throughout said processing prior to said step of drying the granules.
2 Assignments
0 Petitions
Accused Products
Abstract
A process for manufacturing a gas generating material includes preparing a wet mixture of a metal azide and a metal oxide without prior mixing of the metal azide and metal oxide in dry form. The metal azide content of the gas generating material is controlled and the possibility of forming hazardous hydrazoic acid fumes is minimized by maintaining the temperature of the wet mixture of gas generating material between 20° C. and 30° C. The possibility of forming hydrazoic acid fumes is further reduced by maintaining the pH of the wet mixture of gas generating materials at or above 10.5. Excess liquid is removed from the wet mixture of gas generating materials so that the wet mixture has a moisture content of approximately 9%. The excess liquid from the wet mixture is recycled and used the formation of additional gas generating material. The wet mixture of gas generating materials, having a moisture content of approximately 9%, is formed through small openings to form extrudate of gas generating material.
24 Citations
43 Claims
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1. A process for manufacturing a gas generating material comprising the steps of:
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preparing a wet mixture of a metal azide and a metal oxide without prior mixing of the metal azide and metal oxide in dry form; processing the wet mixture to form granules of gas generating material; drying the granules of gas generating material; and maintaining the mixture in a wet state throughout said processing prior to said step of drying the granules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A process for manufacturing a gas generating material comprising the steps of:
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preparing a first wet mixture of ingredients of the gas generating material in a first supply tank; grinding the first wet mixture at a grinding location spaced from the first supply tank; thereafter, directing the first wet mixture into a second supply tank; adding additional ingredients to the first wet mixture in the second supply tank and preparing a second wet mixture in the second supply tank; directing the second wet mixture from the second supply tank to a liquid removal station; removing liquid from the second wet mixture at the liquid removal station to provide the second mixture with a desired moisture content; and forming the second mixture with the desired moisture content into particles. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A process for manufacturing a gas generating material comprising the steps of:
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preparing a wet mixture of a metal azide and an oxidizer without prior mixing of the metal azide and oxidizer in dry form; processing the wet mixture to form granules of gas generating material; drying the granules of gas generating materials after processing the mixture to form granules; and maintaining the mixture at a temperature of 20°
C. to 30°
C. during said preparing and processing steps. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A process for manufacturing a gas generating material comprising the steps of:
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preparing a wet mixture of a metal azide and an oxidizer; sensing the pH of the mixture; adding a base material to the mixture to maintain the pH of the mixture greater than about 10.5; and processing the mixture to form particles of gas generating material. - View Dependent Claims (29, 30, 31, 32, 33)
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34. A process for manufacturing a gas generating material comprising the steps of:
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preparing a wet mixture of a metal azide and an oxidizer; processing the mixture to form particles of gas generating material including removing liquid from the mixture to provide the mixture with a desired moisture content; and recycling the removed liquid by utilizing the removed liquid during said step of preparing a wet mixture. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification