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本文研究了工业甲醛原料中所含Ｆｅ３＋、Ｃｒ３＋、Ｎｉ２＋和Ｍｎ２＋四种微量金属离子对离子交换树脂型固体酸催化剂的中毒效应及其再生方法。结果表明，这些金属离子在催化剂上的吸附量随接触时间的延长而增加，而其吸附速率各不相同。催化剂对四种金属离子的吸附强度依次为Ｆｅ３＋＞Ｃｒ３＋＞Ｎｉ２＋＞Ｍｎ２＋，其中Ｎｉ２＋和Ｍｎ２＋的吸附对催化活性的影响甚微，而Ｆｅ３＋在催化剂上以较快速度吸附，其对催化活性的影响也最为明显。对因吸附金属离子而中毒的催化剂，研究了一种液相再生法，可使中毒催化剂恢复至新鲜催化剂的活性水平。
In this paper, the toxic effects of ion exchange resin solid acid catalyst containing Fe3 +, Cr3 +, Ni2 + and Mn2 + four kinds of trace metal ions contained in industrial formaldehyde raw materials and its regeneration method were studied. The results show that the adsorption amount of these metal ions on the catalyst increases with the contact time, and the adsorption rate varies. The adsorption strengths of the catalysts on the four metal ions were Fe3 +> Cr3 +> Ni2 +> Mn2 +. The adsorption of Ni2 + and Mn2 + had little effect on the catalytic activity, while the adsorption of Fe3 + on the catalyst at a faster rate had the effect on the catalytic activity Also the most obvious. In the case of catalysts poisoned by adsorption of metal ions, a liquid phase regeneration method was studied in which the poisoned catalyst was restored to the activity level of fresh catalyst.