氧化还原树脂的合成及其氧化还原性能

本文主要叙述了以国产717强碱性阴离子交换树脂为基体,采用甲醛与对苯二酚、邻苯二酚、连苯三酚和2,7-萘二酚等聚合生成氧化还原树脂,它们的氧化还原容量分别为5.3,5.4和5.2meq/g-干树脂.文中还介绍了本类树脂的氧化还原电位测定方法,并据此研究和测定了对苯二酚、邻苯二酚和连苯三酚型树脂的氧化还原电位,这些电位的测定结果与其氧化还原实验事实相符.也研究了多种氧化剂和还原剂与自制树脂的交换性能,讨论了这些树脂容量与交换性能的关系.应用所合成的新树脂进行了从硝酸银废液中回收银和对硫化氢试行氧化脱硫处理试验,效果良好.

THE SYNTHESES OF REDOX RESINS AND THEIR REDOX PROPERTIES

The syntheses of several redox resins based on the strong-base anion-exchange resins (ch-inese commercial products) was described. The redox capacities of such resins prepared from hydroquinone: catachol, pyrogallol and 2,7-dihydroxynaphthalene are 5.2, 5.3, 5.3, 5.4 and 5.2 meq/g dry resin, respectively, These values are slightly higher than those described in the literatures.Method for measuring redox potential of redox resins, was suggested. The redox potentials of HSR, CSR, PSR were measured which agreed with experimental results of the redox properties. Exchange properties of the resins with the reducers and oxidizers were also studied.Silver from a waste water containing AgNO3 and sulphur from H2S containing gas were recovered by means of these resins.