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

Advanced Sustainable Systems, Journal Year: 2024, Volume and Issue: unknown

Published: May 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

Language: Английский

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

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 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

Language: Английский

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

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: March 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

Language: Английский

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

Green Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

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

Chemical Communications, Journal Year: 2023, Volume and Issue: 60(6), P. 702 - 705

Published: Dec. 18, 2023

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

Language: Английский

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Methanolysis of Plastic Waste with Manganese Compounds

Advanced Sustainable Systems, Journal Year: 2024, Volume and Issue: 8(11)

Published: June 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

Language: 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, Journal Year: 2024, Volume and Issue: 63(38), P. 17574 - 17583

Published: Sept. 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

Language: Английский

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

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 7, 2024

Language: Английский

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