• preparation of highly pure tetrapropyl ammonium hydroxide using continuous bipolar membrane electrodialysis

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 526
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     conventional methods of tetrapropyl ammonium hydroxide (tpaoh) production via electrolysis, reaction of tetrapropyl ammonium halide with silver oxide, and ion-exchange suffer from high production costs, low quality, and environmental pollution. in this work, continuous bipolar membrane electrodialysis (bmed) is employed for the preparation of tpaoh from its halide as a sustainable alternative process. novel ion-exchange membranes were developed for lab and pilot scale experiments, which indicate an acceptable current efficiency and energy consumption. the results indicate that a cell configuration with four compartments yielded the best results when the salt concentration was 0.3 mol l−1 and the current density was 200 a m−2. the highest conversion in electrodialysis was 91.6%, with a high purity of trace alkali metal ions and low br content (176 ppm) at a tpaoh concentration of 25%. the energy consumption is 1.897 kw h kg−1. continuous pilot experiments demonstrate the feasibility of manufacturing tpaoh by direct splitting its halide for industrial application.

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