No. 113,131 Claims priority, application Great Britain June 2, 1960 7 Claims. (Cl. 260-4481) This invention relates to processes for the preparation of organo-halogeno-silanes, and more particularly relates to the preparation of such compounds by processes in which a compound of the formula RX, where R is an alkyl group and X is a halogen atom, is reacted at an elevated temperature with a silicon-