Patent ID: 6534614
Filing Date: 2003-03-18
Classification: C07F

Abstract:
A process for preparing linear organohydrogensiloxanes, the process comprising:(A) contacting a silane of the formula RHSiCl2 with water in the presence of trimethylchlorosilane to form a hydrolyzate comprising cyclic organohydrogensiloxanes and linear organohydrogensiloxanes, (B) contacting the hydrolyzate with an acidic rearrangement catalyst at a temperature of about 65Â° C. or less thereby increasing the ratio of the linear organohydrogensiloxanes to the cyclic organohydrogensiloxanes, and (C) separating the linear organohydrogensiloxanes from the cyclic organohydrogensiloxanes; where R is selected from the group consisting of saturated monovalent hydrocarbon radicals comprising one to 12 carbon atoms and aryl radicals.