离子交换树脂催化合成对枯基苯酚

用D72 强酸型阳离子交换树脂催化苯酚与α -甲基苯乙烯的Friedel-Crafts烷基化反应 ,合成对枯基苯酚。考察了苯酚 /α -甲基苯乙烯摩尔比、催化剂用量、反应温度和反应时间对烷基化反应的影响。优化反应条件 :n(苯酚 ) /n(α -甲基苯乙烯 ) =2 0、催化剂用量 5 % (占α -甲基苯乙烯的质量分数 )、反应温度 85℃、反应时间 5h ,对枯基苯酚的产率为 97 0 %。合成产物结构由红外、核磁光谱所证实。实验结果表明 ,D72 强酸型阳离子交换树脂催化剂稳定性高 ,易于回收 ,且可重复利用 ,催化活性在反应时间内 (或经多次使用 )未见明显下降。

Synthesis of p-Cumylphenol Using Cationic Exchange Resin Catalyst

ｐ -ＣｕｍｙｌｐｈｅｎｏｌｗａｓｓｙｎｔｈｅｓｉｚｅｄｂｙＦｒｉｅｄｅｌ-Ｃｒａｆｔｓａｌｋｙｌａｔｉｏｎｏｆｐｈｅｎｏｌ with α -methylstyrene in the presence of D 72 strong acid type cationic exchange resin catalyst.The effects of molar ratio of phenol/ α -methylstyrene,amount of D 72 strong acid type cationic exchange resin catalyst,reaction temperature and reaction time on the yield of p -cumylphenol were investigated.The optimum reaction conditions were molar ratio of phenol/α-methylstyrene,85 ℃,5 h of reaction time and 5% of catalyst.The yield of p -cumlphenol was 97 0%.The D 72 strong acid type cationic exchange resin catalyst can be recovered easily,regenerated and reused to give almost the same yield as that given by fresh catalyst.