PRODUCTION OF SILANES STARTING FROM ALLOYS OF SILICON AND ALKALINE-EARTH METALS OR ALKALINE-EARTH ME

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The invention relates to a method for preparing a compound or mixture of compounds of the formula SinH2n+2, where n is an integer greater than or equal to 1 and less than or equal to 3, said method including a step a) of reacting at least one silicide or silicon alloy in powder form and having the formula M1xM2ySiz, where M1 is a reducing metal, M2 is an alkaline metal or alkaline earth metal, and x, y, and z vary from 0 to 1, z being different from 0 and the sum x+y being different from 0, with chlorhydric acid being pre-dissolved in an ether aprotic solvent.