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在氯碱电解槽中使用离子交换膜,其最大优点是可以制得高纯碱,其含氯量可低至几十ppm,纯度可和水银法比美,完全满足人造丝化纤等工业的要求,而又不存在汞害问题。近年来此法的电流效率已提高很多,并能制造30%以上的浓碱,可以节约蒸发用能源,因此在能耗上也是合算的。在欧美诸国利用此法占地少,污染小,具有高电流密度运行和开车、停车易控制等优点,向电槽小型化发展。象造纸厂这样的企业自已装备电解槽也很容易。日本则向大型化发展,以期得到更好的经济效果。最近旭化成已制出15×5平方英尺的大膜。金
In the chlor-alkali electrolyzer using ion exchange membrane, the biggest advantage is that it can be made of high-purity alkali, the chlorine content can be as low as tens of ppm, purity and mercury law than the United States, fully meet the requirements of man-made rayon and other industries, and There is no problem of mercury damage. In recent years, the current efficiency of this method has improved a lot, and can produce more than 30% concentrated alkali, can save energy for evaporation, so the energy consumption is also cost-effective. In Europe and the United States use this method to take up less land, less pollution, with high current density operation and driving, easy to control parking, etc., to the miniaturization of cell development. Enterprises such as paper mills owning their own cells are also easy. Japan is to large-scale development, with a view to get better economic results. Asahi Kasei has recently produced a large film 15 × 5 square feet. gold