Chemical Industry: Silicon Tetrachloride Fume Problem Solved A two-stage Jet-Venturi scrubber/packed tower system solved a number of pollution problems for an Albany, Oregon, company. The Zirconium Extraction Div. of Teledyne Wah Chang produces highquality reactor-grade zirconium and hafnium ozide using a chemical separation process. The zirconium and the hafnium are chlorinated and then formed into pure metals for the nuclear and chemical process industries. The processing of zirconium produces silicon tetrachloride (SiCI4) as a byproduct. The crude inorganic chemical is stored in a tank farm, processed into pure SiCI4 , and sold as a raw material to other chemical processors. Because the silicon tetrachloride generates hydrochloric acid (HCI) fumes when it comes in contact with moisture,

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