Process for the production of sulfur containing organosilicon compounds

A process for the production of a sulfur containing organosilicon compound of the formula (I) Z-Alk-Sx-Alk-Z, where Z is the grouping:

• ##STR8## in which R.sup.1 is an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, benzyl, phenyl or phenyl substituted with at least one methyl, ethyl or chloro group and R.sup.2 is alkoxy of 1 to 8 carbon atoms, methoxyethoxy, cycloalkoxy having 5 to 8 carbon atoms, benzyloxy, phenoxy or phenoxy substituted with at least one methyl, ethyl or chloro group, Alk is a divalent hydrocarbon group having 1 to 10 carbon atoms or such a group interrupted once or twice by --O--, --S-- or --NH-- and x is a number from 2 to 6 comprising reacting a compound of the formula (II) Y-Alk-Hal, where Y is:
• ##STR9## where Hal is fluorine, chlorine, bromine or iodine with, when II is (a), (b) or (c), a compound of the formula R.sup.3 OH in which R.sup.3 is alkyl of 1 to 8 carbon atoms, methoxyethyl, cycloalkyl having 5 to 8 carbon atoms, benzyl, phenyl or phenyl substituted with at least one methyl, ethyl or chloro group and reacting the resulting product or, when II is (d) reacting II, with a hydrosulfide of the formula III MeSH in which Me is ammonium, an alkali metal atom, an equivalent of an alkaline earth metal or zinc and with sulfur, the amount of sulfur together with the sulfur in MeSH being sufficient to satisfy x in formula I, and removing the ammonium or metal halide.