化学
羧酸盐
催化作用
离子液体
亲核细胞
乙烯
卡宾
乙二醇
有机化学
高分子化学
作者
Lei Wang,Gareth Nelson,Jeni Toland,John D. Holbrey
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-08-11
卷期号:8 (35): 13362-13368
被引量:81
标识
DOI:10.1021/acssuschemeng.0c04108
摘要
The use of 1,3-dimethylimidazolium-2-carboxylate as an organocatalyst for the glycolysis of waste PET, poly(ethylene terephthalate), is reported for the first time. Postconsumer PET was completely depolymerized in less than 1 h at 180 °C with up to 60% of bis(2-hydroxyethyl terephthalate) (BHET) recovered by precipitation after cooling the reaction mixture. Under comparable conditions, the basic ionic liquid, 1,3-dimethylimidazolium acetate, was a significantly less effective catalyst suggesting that catalysis occurs through formation of a nucleophilic N-heterocyclic carbene.
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