Manufacture of silicon tetrachloride from rice hulls

Abstract

Abstract Raw rice hulls contain about 20% silica in very finely dispersed form. Pyrolyzed hulls can be chlorinated at 1000°C to give a nearly quantitative yield of silicon tetrachloride free of most other inorganic chlorides. Solid, organic, chlorine‐containing species have been found to be reaction intermediates. Commercial application appears economically attractive.