Abstract: A process for separating metal chlorides from a suspension of metal chlorides in chlorosilanes, in which the suspension is filtered under pressure in the absence of air and moisture forming a filter cake, which is granulated and passed to a dissolution zone where the metal chlorides are dissolved to form an aqueous metal chloride solution. The invention also relates to a filtration and dissolution apparatus for this process, and to an apparatus for introducing the crude reaction gas into a circulated suspension of metal chlorides in chlorosilanes, thus producing a feedstock for the process.