Patent ID: 7666379
Filing Date: 2010-02-23
Classification: C01B

Abstract:
1. A process for purifying a silicon tetrafluoride fluid including removing Bronsted acid present as an impurity in the silicon tetrafluoride fluid, the process comprising: contacting the impurity containing silicon tetrafluoride fluid with an adsorbent polymer having incorporated in its chemical structure a moiety having a basicity so that when incorporated into the polymer the polymer is capable of adsorbing the Bronsted acid impurity to remove at least a portion of the Bronsted acid impurity from the silicon tetrafluoride fluid to produce a purified silicon tetrafluoride fluid, wherein the purified silicon tetrafluoride fluid is electronic grade, wherein the electronic grade is at least 99.99% silicon tetrafluoride on a volume basis, and the Bronsted acid impurity adsorbed comprises hydrochloric acid.