Process for removal of soluble platinum group metal catalysts from liquid product mixtures

Abstract

A process for the neutralization, clarification and decolorization of organosilanes or organosilicones derived from the reaction of an organosilane or a hydropolysiloxane with an aliphatically unsaturated compound in the presence of an acidic platinum catalyst, a process for the conversion of a soluble platinum catalyst into an insoluble form and a process for the recovery of a platinum catalyst from an insoluble anion exchange resin which comprises: (a) contacting a reaction mixture of the organosilane or organosilicone with a basic anionic exchange resin having a free amino or quaternized ammonium salt functionality in an insoluble polymeric matrix under conditions suitable to bind the soluble platinum catalyst to said resin; (b) separating said resin containing bound platinum catalyst from the organosilane or organosilicone reaction mixture and, optionally, (c) treating the separated resin with an inorganic base to convert the bound platinum catalyst to a recoverable salt or (d) subjecting the resin containing bound platinum catalyst to combustion to recover elemental platinum.

Dependencies are inferred from the claim text.