Process for preparing cyclic polysiloxanes

摘要

Prepn. of cyclic polysiloxanes comprises: (a) continuously passing a feed of linear polysiloxanes through a reactor contg. a solid acid catalyst at a pressure greater than 14.7 psi absolute under an inert atmos.; and (b) recovering a mixt. of volatile cyclic polysiloxanes, non-volatile reaction prods., and unreacted feed.