Abstract
BAYER MATERIALSCIENCE plans to build an industrial-scale chlorine unit in Germany using new cathode technology that will reduce energy consumption up to 30% and save as much as 10,000 metric tons of carbon dioxide emissions annually compared with standard membrane technology. According to Bayer, the 20,000-metric-ton-per-year installation will be the first industrial-scale demonstration of oxygen depolarized cathode (ODC) technology in making chlorine, which is used in a wide variety of industrial chemicals and plastics. The unit will be built at Chempark, in Krefeld-Uerdingen, Germany, where Bayer will further process the chlorine into polyurethane precursors. The new unit, which will start up in the first half of 2011, will be similar to a traditional chlor-alkali membrane separation plant, says Hans-Joachim Wittig, Bayer’s climate and energy leader. However, the new process substitutes a proprietary cathode in place of a traditional cathode, such as nickel, in the electrolysis of a salt solution. Use o...
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