Process for preparing cyclic organohydrogensiloxanes

摘要

A process for preparing cyclic organohydrogen- siloxanes is described. It comprises contacting an organohydrogendichlorosilane with about a stoichiometric equivalent of water to form a hydrolyzate. The hydrolyzate is then diluted in an inert solvent and contacted with an acidic rearrangement catalyst to effect formation of cyclic organohydrogensiloxanes. The cyclic organohydrogensiloxanes are subsequently separated from inert solvent and linear organohydrogensiloxanes. The inert solvent and linear organohydrogensiloxanes are later recycled to the process for further contact with the acidic rearrangement catalyst.