Formulation for generating nitrogen gas

C - Chemistry – Metallurgy – 01 – B

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C01B 21/02 (2006.01) C06B 23/04 (2006.01) C06D 5/06 (2006.01)

Patent

CA 2708165

The invention is directed to a solid, porous material, suitable for generating nitrogen gas, said material having a porosity of 20 to 75 vol.%, and a composition comprising, based on the weight of the material of 60 to 90 wt.% of sodium azide, 0.1 to 20 wt.% of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg, 0.1 to 20 wt.% of modifying agent selected from metal oxides and metal carbonates, and a binder, selected from the group consisting of at least one alkali metal silicate, preferably waterglass, or a poly-tetrazole, in an amount of between 3 and 15 wt.%.

L'invention a pour objet une matière solide poreuse, appropriée pour générer de l'azote gazeux, ladite matière ayant une porosité de 20 à 75 % en volume et une composition comprenant, sur la base du poids de la matière, 60 à 90 % en poids d'azoture de sodium, 0,1 à 20 % en poids d'un agent de refroidissement chimique inerte à base d'au moins un sel inorganique ayant une capacité calorifique d'au moins 1400 J/K/kg; 0,1 à 20 % en poids d'un agent de modification choisi parmi des oxydes métalliques et des carbonates de métaux; et un liant, choisi dans le groupe constitué par au moins un silicate de métal alcalin, de préférence du verre soluble, ou un polytétrazole, en proportion comprise entre 3 et 15 % en poids.

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