Silicide compositions containing alkali metals and methods...

Details Silicide compositions containing alkali metals and methods... Silicide compositions containing alkali metals and methods...

C - Chemistry, Metallurgy

01

B

C01B 25/01 (2006.01)

Patent

CA 2570295

The invention relates to a method of making alkali metal silicide compositions, and the compositions resulting from the method, comprising miring an alkali metal with silicon and heating the resulting mixture to a temperature below about 475 ~C. The resulting compositions do not react with dry O2. Also, the invention relates to sodium silicide compositions having a powder X-ray diffraction pattern comprising at least three peaks with 2Theta angles selected from about 18.2, 28.5, 29.5, 33.7, 41.2, 47.4, and 56.2 and a solid state 23Na MAS NMR spectra peak at about 18 ppm. Moreover, the invention relates to methods of removing a volatile or flammable substance in a controlled manner. Furthermore, the alkali metal silicide compositions of the invention react with water to produce hydrogen gas.

L'invention concerne une méthode de fabrication de compositions de siliciure de métaux alcalins. L'invention concerne également des compositions obtenues par cette méthode. Cette méthode consiste à mélanger un métal alcalin à du silicium et à chauffer ce mélange à une température inférieure à 475 °C environ. Les compositions obtenues ne réagissent pas avec de l'oxygène sec. L'invention concerne des compositions de siliciure de sodium présentant un motif de diffraction de rayons X sur poudre comprenant au moins trois pics présentant des angles 2 téta sélectionnés parmi: 18,2; 28,5; 29,5; 33,7; 41,2; 47,4 et 56,2; et un pic spectral 23Na MAS NMR en état solide à 18 ppm environ. En outre, l'invention concerne des méthodes pour supprimer une substance volatile inflammable, de manière contrôlée. L'invention concerne encore des compositions de siliciure de métaux alcalins réagissant avec l'eau pour produire du gaz hydrogène.

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