Recovery of Polyol and Aromatic Amines from Rigid Polyurethane Foams via Ammonolysis.

ABSTRACT: Polyurethane ranks as one of the most significant plastics globally in terms of production volume and economic value, serving a crucial role in modern society. Due to complexities in the chemical recycling of polyurethane, replacement rates in recycled materials tend to be low, and the recovery of the isocyanate-derived aromatic compounds is often neglected. While many recycling efforts try to address these shortcomings, they primarily focus on TDI-based flexible foams, as recycling rigid PU foams is more challenging. In this work, ammonolysis is reported as an effective method for the recycling of rigid PU foams using ammonia to efficiently produce aromatic amines and polyols, while enabling easy recovery of the excess ammonia. A quantitative ¹H NMR analysis method was develope

SUBMITTER: Van Belleghem L 

PROVIDER: S-EPMC12308413 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature