化工进展 ›› 2016, Vol. 35 ›› Issue (S2): 272-275.DOI: 10.16085/j.issn.1000-6613.2016.s2.045

• 生物与医药化工 • 上一篇    下一篇

咪唑类离子液体催化合成抗氧剂BHT

赵磊, 谢君怡, 黄文才   

  1. 四川大学化学工程学院制药与生物工程系, 四川 成都 610065
  • 收稿日期:2016-09-26 出版日期:2016-12-31 发布日期:2016-12-22
  • 通讯作者: 黄文才,副教授,主要研究方向为药物中间体合成及新药研发。E-mail:hwc@scu.edu.cn。
  • 作者简介:赵磊(1991-),男,硕士研究生,研究方向为制药中间体及药物合成。E-mail:scuzhaolei@163.com。

Study on the synthesis of BHT catalyzed by ionic liquid

ZHAO Lei, XIE Junyi, HUANG Wencai   

  1. Department of Pharmaceutical and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2016-09-26 Online:2016-12-31 Published:2016-12-22

摘要: 2,6-二叔丁基对甲酚(BHT)是一种受阻酚类抗氧化剂,因其抗氧化性强、挥发性低、稳定性高、耐用性好等优点被广泛应用于化工、食品、医药等领域。本文以对甲酚和异丁烯为原料,对咪唑类离子液体1-(3-磺酸基丙基)-3-甲基咪唑(IL1)催化合成BHT的反应进行了研究,得到的最优反应条件为:对甲酚与催化剂IL1的摩尔比为5:1,在80℃下反应8h。BHT粗品的含量达到99.1%,收率为93.0%,且IL1重复使用4次后仍具有较高的催化活性。与传统酸性催化剂如浓硫酸和对甲苯磺酸比较,IL1具有催化活性高、易于分离、可重复使用、对设备腐蚀性小等优点,在BHT的工业制备中具有良好的应用前景。

关键词: 2,6-二叔丁基对甲酚, 咪唑, 离子液体

Abstract: As a typical sterically hindered phenolic antioxidant,2,6-di-tert-butyl-4-methyl-phenol,also known as BHT,is widely used in chemical industry,food,medicine and other fields owing to its strong anti-oxidation property,low volatility,high stability and strong durability.The preparation of BHT catalyzed by 1-(3-sulfopropyl)-3-methyl imidazole(IL1) using p-cresol and isobutylene as the starting materials was studied.The optimal reaction conditions were determined as follows:the molar ratio of p-cresol to IL1 was 5:1,and the reaction was carried out at 80℃ for 8h.The purity of crude BHT was 99.1% and the yield was 93.0%.Furthermore,it was found that IL1 could be recycled for at least four times without any apparent loss of catalytic activity.In general,IL1 was a promising alternative for such traditional acid catalysts as H2SO4 and TsOH for the preparation of BHT,owing to its advantages of easy separation,reusability,high activity,and low corrosion to equipment.

Key words: BHT, imidazole, ionic liquid

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