Highly efficient synthesis of 1-methoxy-2-propanol using ionic liquid catalysts in a micro-tubular circulating reactor

• 作者: Chao-Li Wang Duan-Jian Tao Wen-Qiang Gong Yan Zhou Yu-Mei Liu Zhang-Min Li
• 来源期刊: 绿色能源与环境:英文版
• 学科: 化学
• 关键词: Ionic liquids Micro-tubular circulating reactor ALCOHOLYSIS Propylene oxide 1-Methoxy-2-propanol
• 年，卷（期）: 2020,（2）
• 页码范围: 147-153
• 页数: 7页
• 分类号: O64

摘要

The catalysis of ionic liquids (ILs) in the traditional stirred reactor suffers from insufficient mass and heat transfer, which always needs a long reaction time and results in a low reaction rate. In this work, highly efficient synthesis of 1-methoxy-2-propanol via the alcoholysis reaction of propylene oxide (PO) with methanol was proposed and achieved by the combination of micro-tubular circulating reactor with the IL [N4444] [Buty] catalyst. Compared with the stirred reactor, the rate of alcoholysis reaction in a micro-tubular circulating reactor was found to be significantly improved. The reaction time was remarkably shortened to 20 min from 180 min as well as the yield of 1-methoxy-2-propanol reached 92%. Moreover, the kinetic study further demonstrated that the main reaction rate to 1-methoxy-2-propanol (K1) was about 20 times larger than the side reaction rate to byproduct 2-methoxy-1-propanol (K2) in the temperature range of 363–383 K. Such combination of micro-tubular circulating reactor with IL catalysts is believed to be a class of effective process intensification technique for highly efficient synthesis of 1-methoxy-2-propanol.