Ionic Liquid‐Mediated Oxidative Degradation of Polycaprolactone into Adipic Acids over Pt/TiO₂ in Water

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract Upgrading polyester waste into high value‐added chemicals can achieve carbon recycling, which is of great significance for sustainable development. Herein, we report a one‐pot protocol to oxidatively degrade polycaprolactone (PCL) with air adipic acid (AA) mediated by ionic liquid (IL, e.g., 1‐butyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide, [BMIm][NTf 2 ]) in water. In this protocol, IL catalyzes the hydrolysis PCL 6‐hydroxyhexanoic (6‐HHA) and further mediates oxidation 6‐HHA AA over TiO ‐supported Pt nanocatalysts, reaching highest yield 85.6% under relatively mild conditions (140 °C, 1.5 MPa). Mechanism investigation indicates that both O •– •OH derived from oxygen water are involved form 6‐oxohexanoic via two pathways, convert AA. The inhibits overoxidation AA, thus leading selectivity toward This provides green feasible way also access

Язык: Английский

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Mg(OTf)₂ as an Excellent Catalyst for the Reductive Depolymerization and Methanolysis of Polyesters and Polycarbonates

Advanced Sustainable Systems, Год журнала: 2024, Номер unknown

Опубликована: Май 15, 2024

Abstract The use of alkaline earth‐abundant metal catalysts as alternatives to transition in the depolymerization plastic waste is a very important research area. In this work, first method described for conversion polyesters into value‐added compounds catalyzed by magnesium catalyst. It demonstrated that commercially available, inexpensive and air‐stable, earth catalyst Mg(OTf) 2 efficiently promotes reductive several using pinacolborane (HBpin) reducing agent with good excellent yields. This also remains active at least 12 consecutive polycaprolactone (PCL) reactions yields between 89% 81%. efficient polycarbonate poly(bisphenol A carbonate) (PC.BPA). Furthermore, it found successfully catalyzes methanolysis polycarbonates moderate temperature

Язык: Английский

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Challenges and opportunities in catalytic hydrogenolysis of oxygenated plastics waste: polyesters, polycarbonates, and epoxy resins

Green Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

This review comprehensively explores various homogeneous and heterogeneous catalytic systems for the hydrogenolysis of oxygenated polymeric wastes (OXPs), presenting an adaptable solution to plastic pollution generating valuable feedstock.

Язык: Английский

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Ionic Liquid‐Mediated Oxidative Degradation of Polycaprolactone into Adipic Acids over Pt/TiO₂ in Water

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Upgrading polyester waste into high value-added chemicals can achieve carbon recycling, which is of great significance for sustainable development. Herein, we report a one-pot protocol to oxidatively degrade polycaprolactone (PCL) with air adipic acid (AA) mediated by ionic liquid (IL, e.g., 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [BMIm][NTf2]) in water. In this protocol, IL catalyzes the hydrolysis PCL 6-hydroxyhexanoic (6-HHA) and further mediates oxidation 6-HHA AA over TiO2-supported Pt nanocatalysts, reaching highest yield 85.6% under relatively mild conditions (140 °C, 1.5 MPa). Mechanism investigation indicates that both O2 •- •OH derived from oxygen water are involved form 6-oxohexanoic via two pathways, convert AA. The inhibits overoxidation AA, thus leading selectivity toward This provides green feasible way also access

Язык: Английский

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Reductive Depolymerization of Polycarbonates and Polyesters Using Alkaline Earth Catalysts

Polymer Degradation and Stability, Год журнала: 2025, Номер unknown, С. 111456 - 111456

Опубликована: Май 1, 2025

Язык: Английский

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

Chemical Communications, Год журнала: 2023, Номер 60(6), С. 702 - 705

Опубликована: Дек. 18, 2023

Ru-MACHO®-BH is an effective catalyst for controlled depolymerization of polybutylene succinate. Under low pressure hydrogen the produces

Язык: Английский

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Methanolysis of Plastic Waste with Manganese Compounds

Advanced Sustainable Systems, Год журнала: 2024, Номер 8(11)

Опубликована: Июнь 27, 2024

Abstract This work describes a very efficient methodology for the methanolysis of polyester and polycarbonate plastic waste into variety valuable products using homogeneous heterogeneous manganese compounds in presence KO t Bu. Excellent yields are obtained 1 mol% catalysts Mn(OTf) 2 , Mn (CO) 10 MnBr(CO) 5 MeCpMn(CO) 3 Bu, under mild reaction conditions. The catalyst, manganese(II) ethyl/butyl phosphonate silica (Si‐Mn), also successfully promoted with excellent yields. Furthermore, this catalyst can be applied at least 12 catalytic cycles

Язык: Английский

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Hydroborative Depolymerization of Polyesters and Polycarbonates to Diols Catalyzed by Heterogeneous Lanthanum Materials La(CH₂C₆H₄NMe₂-o)₃@SBA-15

Inorganic Chemistry, Год журнала: 2024, Номер 63(38), С. 17574 - 17583

Опубликована: Сен. 5, 2024

Chemical recycling is a promising strategy to establish circular plastic economy, and it still in an early stage of development. In this work, the reductive depolymerization polyesters polycarbonates into their corresponding borylated alcohols promoted by heterogeneous lanthanum materials was described. Grafting easily accessible tris(aminobenzyl) complex La(CH

Язык: Английский

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Copper/Iron Cocatalyzed Depolymerization of Postconsumer Polycarbonate: A One-Pot Strategy to Synthesize Aryl Ethers

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер unknown

Опубликована: Дек. 7, 2024

Язык: Английский

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