Highly selective synthesis for 4,4′-bisphenol F from phenol and formaldehyde catalyzed with [C₄mim][HSO₄] ionic liquid

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• 作者：Danfeng Wang ; Zhicheng He ; Zhimin Wu ; ^{xdwuzm@163.com" class="auth_mail" title="E-mail the corresponding author} ; Ying Tan ; Yongfei Li ; Yuejin Liu ; ^{xdlyj@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：4 ; 4&prime ; -Bisphenol F ; Phenol ; Formaldehyde ; 1-Butyl-3-methylimidazolium hydrogen sulfate
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：24
• 期：9
• 页码：1166-1170
• 全文大小：535 K

文摘

The effects of N-methylimidazole cation [C_nmim] with different alkyl chain lengths, the types of cations and anions of ionic liquids and the reaction parameters on the catalytic activity and the selectivity for 4,4′-bisphenol F were investigated. The hydrogen bonding between the hydroxyl of phenol and the C2-position hydrogen of imidazole moiety in hydrophilic imidazole-based ionic liquid has important influence on the selectivity for 4,4′-bisphenol F, and under the conditions of the molar ratio of phenol/[C₄mim][HSO₄] 1:1, reaction temperature 65 °C and the theoretical molar ratio of phenol/formaldehyde 2:1, the selectivity for 4,4′-bisphenol F reached 69.1%. Compared with the high phenol/formaldehyde ratio reported in literatures, the low molar ratio of phenol/formaldehyde and the low reaction temperature can greatly reduce energy consumption, and has important significance for industrial application.