Brφnsted酸性离子液体催化苯酚羟烷基化反应合成双酚F  

Synthesis of Bisphenol F Through Hydroxyalkylation of Phenol Catalyzed by Brφnsted Acidic Ionic Liquid

作　　者：王庆[1] 刘杰[1] 吴志民[1] 李勇飞[1] 肖丹[1] 田娟[1] 谈瑛[1] 刘跃进[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《高校化学工程学报》2014年第4期758-763,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(21276217);湖南省高校创新平台绿色催化与反应工程开放基金(09K036);湖南省自然科学基金湘潭联合基金(09JJ9008)

摘　　要：合成了以不同碳链长度的N-甲基咪唑[C6mim]+为阳离子,HSO4-、H2PO4-、CH3COO-为阴离子的一系列Brφnsted酸性离子液体,表征了其结构和酸性强度,以苯酚和甲醛合成双酚F的羟烷基化反应考察了它们的催化效果。在阳离子结构一定时,阴离子为HSO4-的离子液体酸性最强,催化效果最好;在阴离子结构一定时,随着阳离子中烷基链增加,酸性缓慢增加,但当烷基链中碳原子数为6时,催化效果最好。以[C6mim][HSO4]为酸催化剂,在反应时间60 min、酸/醛比1:1、原料酚醛比6:1、反应温度90℃的条件下双酚F的收率达到80.5%,选择性超过90%。该离子液体重复使用性好和腐蚀性低,有望成为一种极具发展潜力的双酚F合成催化剂。A series of Bronsted acidic ionic liquids based on N-methylimidazole cation [C61nim] with different alkyl chain lengths and counter anions （HSO4^-, H2PO4^-, CH3COO^- ） were synthesized. The structure and acidity of these ionic liquids were characterized, and the catalytic activities under different reaction conditions were investigated. The ionic liquid with HSO4^- anion and alkyl chain length of C6 attached to the cation exhibits the highest catalytic activity for bisphenol F （BPF） synthesis. Under the reaction conditions of temperature 90℃, reaction time 60 min, phenol/formaldehyde molar ratio 6：1 and catalyst/formaldehyde molar ratio 1：1, [C6mim][HSO4] shows excellent reaction activity with 80.5% yield and over 90% selectivity for bisphenol F synthesis. The ionic liquid was also found to have good reusability and low corrosion effects. These results suggest that the acidic ionic liquid [C6mim][HSO4^-] is a potential green approach to produce BPE

关 键 词：Bronsted酸性离子液体 羟烷基化反应 催化合成 双酚F 

分 类 号：TQ243.2[化学工程—有机化工]