Method for preparing epsilon-caprolactone by reaction of paired electrodes

The invention relates to a method for preparing epsilon-caprolactone by utilizing paired electrodes, which comprises the following steps: carrying out a Kolbe coupling reaction at an anode of an electrolytic cell, carrying out a reduction reaction at a cathode to reduce adipic acid diester into 6-hydroxyadipate, and carrying out spontaneous cyclization on the 6-hydroxyadipate under electrolysis conditions to generate epsilon-caprolactone. A green and safe method is provided for epsilon-caprolactone, and the defects that in the prior art, peroxy acid is high in risk, processes are complex and the like are overcome. The paired electrodes improve the utilization efficiency of electric energy, reduce the production cost and improve the operation safety, so that the method has a good industrialprospect. 本发明涉及一种成对电极制备ε-己内酯的方法，包括，在电解槽的阳极发生Kolbe偶联反应，在阴极发生还原反应，将己二酸二酯还原成6-羟基己二酸酯，6-羟基己二酸酯在电解条件下自发环化生成ε-己内酯。本发明为ε-己内酯提供了一种绿色、安全的方法，解决了现有技术中过氧酸危险性大、流程复杂等缺点。成对电极提高了电能的利用效率，降低了生产成本，提高了操作的安全性，具有良好的工业化前景。