电解制备过硫酸铵所用阳离子交换膜的实验研究

不同槽电压与电解液流量条件下，对HDGN膜、HDCMI膜、HDNAF膜与HDJCM膜4种全氟磺酸型阳离子交换膜在电解制备过硫酸铵中的电解性能进行实验研究，以提高其电流效率并降低电耗。实验采用自制电解槽，以烧结镀铂钛极板作为阳极，铅锑锡合金作为阴极，实验结果表明：在最优工况下HDGN膜可以将电流效率提高至95％，电耗降低至1 113 kW·h/t（生产每t过硫酸铵的电耗）；HDCMI膜、HDNAF膜与HDJCM膜的最高电流效率分别可以达到73%、78%与81%，所对应的最低电耗分别为1 770 kW·h/t、1 506 kW·h/t与1 305 kW·h/t。并且HDGN膜由于含有增强网布，从而具备足够的机械强度。因此，在电解制备过硫酸铵生产过程中HDGN膜具有良好的工业化应用前景。
Abstract：In order to improve current efficiency and decrease energy consumption in the preparation of ammonium persulfate by electrolysis, the electrolytic properties of four cation exchange membranes employed in the electrolysis were investigated for different cell voltages and electrolyte flow rates. The experiment used a sintered platinized titanium anode and a Pb-Sb-Sn alloy cathode in a self-made electrolytic cell. The results indicated that an HDGN membrane gave the highest current efficiency of 95% and the lowest energy consumption of 1 113 kW·h/t (energy consumption per ton of the ammonium persulfate generated) under the optimal operating conditions. The highest current efficiencies with an HDJCM membrane, an HDNAF membrane and an HDCMI membrane were 81%, 78% and 73%, respectively, with their lowest energy consumption being 1 305 kW·h/t, 1 506 kW·h/t and 1 770 kW·h/t, respectively. Furthermore, the mechanical strength of the HDGN membrane is sufficient by virtue of the reinforced mesh. Therefore the HDGN membrane will have good prospects for application in the preparation of ammonium persulfate by electrolysis.