Catalytic tandem dehydrochlorination-hydrogenation of PVC towards valorisation of chlorinated plastic waste.

ABSTRACT: Chemical treatment of end-of-life PVC at high temperature often results in the formation of polyacetylene and eventually aromatic char. These insoluble conjugated polymers lead to industrial reactor blockages, and limit the efficiency in recycling chlorinated plastic waste. To address this challenge, a solvent-based tandem dehydrochlorination-hydrogenation process is proposed for the conversion of PVC to a saturated polymer backbone. When combining tetrabutylphosphonium ionic liquids and homogeneous Rh catalysts under H₂ pressure, 81% dehydrochlorination is reached in 2 h, with the hydrogenation proceeding smoothly with minimal catalyst use of 0.5-2.0 mol% Rh. This process for PVC dechlorination yields soluble products that lack aromatics, have high degrees of dechlorination and

SUBMITTER: O'Rourke G 

PROVIDER: S-EPMC10132168 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature