采用乙酰胺-氯化锌低共熔催化剂促进聚对苯二甲酸乙二醇酯（PET）催化降解，实现PET在常压、较低温度下的快速降解，生成高值化对苯二甲酸乙二醇酯（BHET）单体，实现PET循环再生利用。通过单因素实验分别研究反应温度、反应时间及催化剂质量分数对降解效率的影响。利用Design-Expert8.0软件优化实验设计，构建响应面分析模型。研究发现，在反应温度为195 ℃、反应时间为14 min以及催化剂质量分数为4%的条件下，PET的降解转化率达到最优，单体收率高达80.9%。通过对比模型预测值与实验实际值验证了模型的可靠性，平均偏差为-1.2%。表征结果显示反应产物为高纯度单体BHET。

Acetamide-zinc chloride eutectic catalyst was used to promote the catalytic degradation of polyethylene terephthalate (PET), achieving rapid degradation of PET at atmospheric pressure and low temperature, and generating high value ethylene terephthalate (BHET) monomer for PET recycling. The effects of reaction temperature, reaction time, and the mass fraction of catalyst on the degradation efficiency were investigated through single factor experiments. Design-Expert 8.0 software was employed to optimize the experimental design and construct a response surface analysis model. It was found that under the conditions of a reaction temperature of 195 °C, a reaction time of 14 min, and a 4% mass ratio of catalyst to PET, the degradation conversion rate of PET reached its maximum, with the monomer yield as high as 80.9%. The reliability of the model is verified by comparing the predicted value of the model with the actual experimental value, and the average deviation is -1.2%. Characterization indicates that the reaction product is a high-purity

monomeric BHET.