METHOD FOR THE EXTRACTION OF GeCl4 AND/OR SiCl4 FROM OPTICAL FIBERS OR GLASS RESIDUE AND METHOD FOR PRODUCING SiCl4 FROM SiO2-CONTAINING MATERIALS

摘要

The invention provides a method for producing SiCl(and optionally GeCl) from SiO-containing material. The method includes the steps of: reacting comminuted SiO-containing material with a reagent including a solid carbonaceous reducing agent, a salt, a boron compound to obtain a gaseous product including SiCl, BCl, and optionally GeCl; and then condensing the gaseous SiCl, BCl(with or without GeCl) into liquid SiCl, BCland GeCl.