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May Chementator Briefs

By Edited by Gerald Ondrey |

  Wastewater reuse Aqua-Chem Inc. (Knoxville, Tenn.; www.aqua-chem.com) has developed a filtration-based process for purifying wastewater from large-scale carpet manufacturing. The process effectively removes dyes and other additives from wastewater to reduce concentrations from around 800 ppm to less than 30 ppm. A recent pilot with a U.S.-based carpet manufacturer demonstrated that 70% of wastewater effluent in dyeing operations can be reused in manufacturing. The company says with optimizations planned for the full-scale system, the process will be able to recover 90% of wastewater. A cleaner route to MEK Within the next two to three years, Idemitsu Kosan Co. (Idemitsu;Tokyo; www.idemitsu.com) plans to install 80,000–100,000-ton/yr production capacity for methyl ethyl ketone (MEK) in Asia. The new production facility will utilize a new process that the company has developed and demonstrated in a 400,000-ton/yr plant at its Tokuyama Factory. The process involves a direct hydration using a hetero-poly acid instead of the indirect hydration by sulfuric acid. Elimination of the H2SO4 removes the need for corrosion-resistant equipment and the waste associated with the liquid acid. Replacement for indium Researchers at Eindhoven…
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