氯甲基化苯乙烯-二乙烯苯共聚物的Friedel-Craft反应

氯甲基化苯乙烯-二乙烯苯共聚物在傅氏催化剂存在下与取代酚(芳香胺)反应可以得到一些含取代酚基的离子交换树脂。它们的物理化学性质和红外光谱分析证实了该类树脂的结构。溶剂的性质、催化剂的种类、用量、反应温度、时间、取代酚(芳香胺)的取代基位置、聚合物的含氯量和孔结构都对反应和副反应有明显的影响。这类离子交换树脂在重金属分离、脱色,特别在维生素和抗菌素的选择吸附等方面,都有十分重要的意义。

THE FRIEDEL CRAFT REACTIONS OF THE CHLOROMETHY-LATED STYRENE DIVINYLBENZENE COPOLYMERS

Some new maeroreticular ion exchange resins were prepared by the reactions of the chloromethylated styrenedivinylbenzene copolymers with substituted phenols (or anilines), such as salicylic acid, p-hydroxybenzoic acid, 2,4,-, 2,5-, 2,6-dihydroxyben-zoic acid, 2-hydroxy-3-naphthoic acid, gallic acid, o-aminobenzoic acid etc. in the presence of Friedel-Crafts catalysts. The structures of the new ion exchange resins were confirmed by infrared spectroscopic analysis.The preparative conditions, such as the properties of solvents, amounts of catalysts, the reaction of temperature and time, the position of substituted groups, content of chlorine of chloromethylated copolymers etc., affecting the properties of the new ion exchange resins are discussed.New ion exchange resins were widely used for saparating heavy metals, decoloring and the extractions and purifications of vitamines and antibiotics.