Process for reducing the amount of linear siloxane in a mixture of linear and cyclic siloxanes

摘要

A process for the production of a cyclic siloxane described by formula        (R¹(CH₃)SiO)_dcomprising reacting in the presence of an alkali catalyst a siloxane mixture comprising a silane or a linear siloxane described by general formula        HO(R¹(CH₃)SiO)_bHand a cyclic siloxane described by general formula        (R¹(CH₃)SiO)_c,where R¹ is an alkenyl group having 6 to 14 carbon atoms, b is an integer of one or greater, c is an integer of 3 or greater, and d is an integer of 3 or greater.