A process for preparing silanes of the formula 1: R.sub.a SiH.sub.b Cl.sub.4-a-b (1) where R is methyl or ethyl, a is 0, 1, 2 or 3 and b is 0 or 1, from hydrogen chloride gas and reactants selected from among a) silicon metal, b) disilanes and oligosilanes whose radicals are selected from among H, R and Cl, and mixtures thereof, wherein the hydrogen chloride gas is prepared from H.sub.2 and Cl.sub.2 in a concerted process.

Un proceso para preparar los silanes del fórmula 1: R.sub.a SiH.sub.b Cl.sub.4-a-b (1) donde está metílico o ethyl R, a es 0, 1, 2 o 3 y b es 0 o 1, del gas del cloruro de hidrógeno y los reactivo seleccionados entre a) del metal del silicio, b) los disilanes y los oligosilanes que radicales se seleccionan entre de H, R y cl, y las mezclas de eso, en donde el gas del cloruro de hidrógeno está preparado de H.sub.2 y de Cl.sub.2 en un proceso concertado.

 
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