Recycling
Bayer constructs world-scale plant for chlorine recycling in Shanghai
Sep 22, 2006
Announced on September 20, Bayer MaterialScience AG is planning to construct world-scale production plants to manufacture the polyurethane raw materials MDI and TDI at the integrated Shanghai plant.
The chlorine required to operate these plants is produced on site at the world's largest hydrochloric acid recycling plant. Work is currently in progress on Bayer MaterialScience's new hydrochloric acid electrolysis facility, which offers an annual capacity of 215,000 metric tons of chlorine and is due to be commissioned in 2008.
The innovative oxygen-depleting cathode (ODC) technology which has been developed by Bayer MaterialScience and partners will be used at the plant on a world scale for the first time.
Hydrochloric acid occurring as a by-product in isocyanate production is separated during electrolysis into chlorine and water by means of electricity, with oxygen as a further coreactant. The chlorine obtained is reused for isocyanate production and thus deployed in a continuous cycle. The electrode that depletes the oxygen functions as a cathode, which is why the new process is referred to as oxygen-depleting cathode technology.
The chlorine required to operate these plants is produced on site at the world's largest hydrochloric acid recycling plant. Work is currently in progress on Bayer MaterialScience's new hydrochloric acid electrolysis facility, which offers an annual capacity of 215,000 metric tons of chlorine and is due to be commissioned in 2008.
The innovative oxygen-depleting cathode (ODC) technology which has been developed by Bayer MaterialScience and partners will be used at the plant on a world scale for the first time.
Hydrochloric acid occurring as a by-product in isocyanate production is separated during electrolysis into chlorine and water by means of electricity, with oxygen as a further coreactant. The chlorine obtained is reused for isocyanate production and thus deployed in a continuous cycle. The electrode that depletes the oxygen functions as a cathode, which is why the new process is referred to as oxygen-depleting cathode technology.
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