Process for the production and purification of sodium hydride

C - Chemistry – Metallurgy – 01 – B

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C01B 6/04 (2006.01) C01B 6/34 (2006.01)

Patent

CA 2456917

The invention relates to a method for producing sodium hydride, whereby a compound containing carbon is introduced into a melt medium at temperatures higher than the decomposition temperature of the sodium hydride, around 420~C, which contains sodium hydride or a mixture of one or more alkalimetal hydrides excluding oxygen and humidity. The reaction product is subsequently separated from the reaction medium at temperatures <= 420~. The invention also relates to a method for purifying impure sodium hydride, excluding oxygen and humidity, whereby sodium hydride is introduced into a melt medium at temperatures higher than the decomposition temperature of the sodium hydride, around 420~C, said melt medium containing one or more alkalimetal hydrides. The sodium hydride is subsequently separated from the melt medium at temperatures <= 420~C.

L'invention concerne un procédé permettant de produire de l'hydrure de sodium, selon lequel un composé contenant du carbone est introduit dans une matière en fusion portée à des températures supérieures à la température de décomposition de l'hydrure de sodium, de l'ordre de 420 ·C, qui contient de l'hydroxyde de sodium ou un mélange d'un ou de plusieurs hydroxydes de métal alcalin, sous exclusion de l'oxygène et de l'humidité. Le produit de réaction est ensuite séparé du milieu de réaction, à des températures <= 420 ·C. L'invention concerne en outre un procédé permettant de purifier de l'hydrure de sodium contaminé, selon lequel l'hydrure de sodium est introduit, sous exclusion de l'oxygène et de l'humidité, dans une matière en fusion portée à des températures supérieures à la température de décomposition de l'hydrure de sodium, de l'ordre de 420 ·C, ladite matière en fusion contenant un ou plusieurs hydroxydes de métal alcalin. L'hydrure de sodium est ensuite séparé du milieu en fusion à des températures <= 420 ·C.

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