Highly selective pressure-dependent (transfer) hydrogenative depolymerization of polybutylene succinate

Johnson, Mary L.; Fine, Rachel L.; Stankowski, Dakota S.; Koch, Casey A.; Limoges, Kylie A.; Robertson, Nicholas J.

doi:10.1039/d3cc05239g

Chem. Commun.

2024

DOI: 10.1039/d3cc05239g

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Highly selective pressure-dependent (transfer) hydrogenative depolymerization of polybutylene succinate

Mary L. Johnson,

Rachel L. Fine,

Dakota S. Stankowski

et al.

Abstract: Ru-MACHO®-BH catalyzes a novel transfer hydrogenation depolymerization of polybutylene succinate to gamma-butyrolactone at low pressures. High pressure hydrogen converts the system to a hydrogenative depolymerization.

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Depolymerization of Polycarbonates by Transesterification without Using Base, Ionic Liquid, and Additives

Yamada,

Komine,

Hirano

2024

ChemCatChem

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La(III)‐catalyzed depolymerization of polycarbonates produces the raw carbonates and diols by transesterification without the use of bases, ionic liquids or additives. Poly(bisphenol A carbonate) (1a) is depolymerized by [La(acac)3] (acac: acetylacetonate) (1 mol%) in MeOH at 135 ˚C for 20 min to give dimethyl carbonate (2a) (95%) and bisphenol A (3a) (93%). This reaction can also be carried out in the air using MeOH as received and on a 10 gram‐scale. A commercial compact disk (CD) can also be depolymerized quantitatively. Depolymerization of 1a in EtOH or 1,2‐propanediol produces corresponding carbonate with 3a. Poly(ethylene carbonate) (1b) and poly(propylene carbonate) (1c) are converted into dimethyl carbonate and corresponding glycols in high yields in MeOH. The kinetic study suggests the surface reaction mechanism for the La(III)‐catalyzed depolymerization of 1a.

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Depolymerization of Polycarbonates by Transesterification without Using Base, Ionic Liquid, and Additives

Yamada,

Komine,

Hirano

2024

ChemCatChem

View full text Add to dashboard Cite

show abstract

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Highly selective pressure-dependent (transfer) hydrogenative depolymerization of polybutylene succinate

Abstract: Ru-MACHO®-BH catalyzes a novel transfer hydrogenation depolymerization of polybutylene succinate to gamma-butyrolactone at low pressures. High pressure hydrogen converts the system to a hydrogenative depolymerization.

Cited by 1 publication

References 66 publications

Depolymerization of Polycarbonates by Transesterification without Using Base, Ionic Liquid, and Additives

Depolymerization of Polycarbonates by Transesterification without Using Base, Ionic Liquid, and Additives

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