Polyethylene Terephthalate Deconstruction Catalyzed by a Carbon-Supported Single-Site Molybdenum-Dioxo Complex

被引：153

作者：

Kratish, Yosi ^{[1
,2
]}

Li, Jiaqi ^{[1
,2
]}

Liu, Shanfu ^{[1
,2
]}

Gao, Yanshan ^{[1
,2
]}

Marks, Tobin J. ^{[1
,2
]}

机构：

[1] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA

[2] Northwestern Univ, Inst Catalysis Energy Proc ICEP, 2145 Sheridan Rd, Evanston, IL 60208 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 45期

关键词：

heterogenous catalysis; hydrogenolysis; molybdenum; polymers; reaction mechanisms; REDUCTIVE DEPOLYMERIZATION; THERMAL-DEGRADATION; POLY(ETHYLENE-TEREPHTHALATE); GLYCOLYSIS; ESTERS; EFFICIENT; WASTE; POLYESTERS; PYROLYSIS; TRANSESTERIFICATION;

D O I：

10.1002/anie.202007423

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polyethylene terephthalate (PET) is selectively depolymerized by a carbon-supported single-site molybdenum-dioxo catalyst to terephthalic acid (PTA) and ethylene. The solventless reactions are most efficient under 1 atmosphere of H-2. The catalyst exhibits high stability and can be recycled multiple times without loss of activity. Waste beverage bottle PET or a PET + polypropylene (PP) mixture (simulating the bottle + cap) proceeds at 260 degrees C with complete PET deconstruction and quantitative PTA isolation. Mechanistic studies with a model diester, 1,2-ethanediol dibenzoate, suggest the reaction proceeds by initial retro-hydroalkoxylation/beta-C-O scission and subsequent hydrogenolysis of the vinyl benzoate intermediate.

引用

页码：19857 / 19861

页数：5

共 66 条

[1] Fe3O4-boosted MWCNT as an efficient sustainable catalyst for PET glycolysis [J].