How to remove impurity ions from platinum-carbon catalyst solutions
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The platinum-carbon catalysts produced are washed during the cleaning process until their conductivity meets the required standards; however, when these dried catalysts are tested as finished products, excessive levels of impurity ions are often detected (mainly iron, chromium, nickel, and chlorine at levels ≥500 ppm). Methods for removing metal ions include ion exchange, precipitation, chelation, and electrodialysis, but it seems that none of these are suitable for current platinum-carbon catalyst production lines. Does anyone have any methods or suggestions?
You can try using ultrafiltration or nanofiltration techniques. These methods can effectively remove tiny impurities and ions from the solution, and the equipment is relatively easy to integrate into existing production lines. Furthermore, it is necessary to examine and optimize the drying process to avoid introducing new impurities during drying. .
Thank you for the reply! Nanofiltration technology is used during the cleaning process. The possibility of other impurities being introduced during the drying process is low