Chemical Recycling of Commercial Poly(l-lactic acid) to l-Lactide Using a High-Performance Sn(II)/Alcohol Catalyst System

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A novel Sn(II)/alcohol catalyst system efficiently depolymerizes waste poly(l-lactic acid) into pure l-lactide with excellent yield and selectivity at low catalyst loadings, and the catalyst itself can be recycled multiple times without losing performance. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

Thomas M. McGuire; Antoine Buchard; Charlotte K. Williams

doi:10.1021/jacs.3c05863

September 1, 2023Journal of the American Chemical SocietyOpen Access

Chemical Recycling of Commercial Poly(l-lactic acid) to l-Lactide Using a High-Performance Sn(II)/Alcohol Catalyst System

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Abstract

at 0.01 mol % or 1:10,000 catalyst:PLLA loading. The depolymerization of waste PLLA plastic packaging (coffee cup lids) produces pure l-LA in excellent yield and selectivity. The new catalyst system (Sn + alcohol) can itself be recycled four times in different PLLA "batch degradations" and maintains its high catalytic productivity, activity, and selectivity.

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McGuire et al. (2023) studied this question.

synapsesocial.com/papers/6a1b74d890759efe6f0c6886 https://doi.org/10.1021/jacs.3c05863

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Chemical Recycling of Commercial Poly(l-lactic acid) to l-Lactide Using a High-Performance Sn(II)/Alcohol Catalyst System

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Chemical Recycling of Commercial Poly(l-lactic acid) to l-Lactide Using a High-Performance Sn(II)/Alcohol Catalyst System

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