合成水杨酸-交联聚苯乙烯螯合树脂的新途径

Novel Synthesis of Salicylic Acid-Crosslinked Polystyrene Chelating Resin

采用氯甲基化试剂1,4-二氯甲氧基丁烷对交联聚苯乙烯(CPS)微球实施了氯甲基化反应,然后使5-氨基水杨酸(ASA)与氯甲基化交联聚苯乙烯微球表面的苄氯基团发生亲核取代反应,制得了氨基水杨酸-交联聚苯乙烯(ASA-CPS)螯合树脂。考察了主要反应条件对取代反应的影响,初步试验了ASA-CPS对金属离子的螯合性能。结果表明:ASA-CPS对Fe(Ⅲ)离子具有很强的螯合能力,吸附容量达3.77 mmol/g。

The chloromethylation of crosslinked polystyrene（CPS） microspheres was performed using 1,4-bis（chloromethoxy）butane（BCMB） as the chloromethylation reagent.Then the nucleophilic substitution reaction between 5-amino salicylic acid and benzyl chloride groups on the CMCPS microspheres was conducted,and amino salicylic acid-crosslinked polystyrene resin（ASA-CPS） was obtained.The chemical structure of ASA-CPS resin was analyzed by the infrared spectroscopy.The effects of reaction conditions on the substitution reaction were examined,and the chelating property of ASA-CPS resin for metal ions was tested.The experimental results show that the prepared ASA-CPS resin possesses very high chelating ability for Fe（Ⅲ） ions,with adsorption capacity up to 3.77 mmol/g.