title: Efficient conversion of polyamides to ω-hydroxyalkanoic acids: a new method for chemical recycling of waste plastics.
abstract: An efficient transformation of polyamides to ω-hydroxy alkanoic acids was achieved. Treatment of nylon-12 with supercritical MeOH in the presence of glycolic acid gave methyl ω-hydroxydodecanoate in 85% yield and the alcohol/alkene selectivity in the product was enhanced to up to 9.5:1. The use of (18)O-enriched acetic acid for the reaction successfully introduced an (18)O atom at the alcoholic OH group in the product. This strategy may provide a new and economical solution for the chemical recycling of waste plastics.
authors.affiliation: Department Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755-8611 (Japan), Fax: (+81) 836-85-9231. ak10@yamaguchi-u.ac.jp.
authors.forename: Akio
authors.initials: A
authors.lastname: Kamimura
authors.forename: Kosuke
authors.initials: K
authors.lastname: Ikeda
authors.forename: Shuzo
authors.initials: S
authors.lastname: Suzuki
authors.forename: Kazunari
authors.initials: K
authors.lastname: Kato
authors.forename: Yugo
authors.initials: Y
authors.lastname: Akinari
authors.forename: Tsunemi
authors.initials: T
authors.lastname: Sugimoto
authors.forename: Kohichi
authors.initials: K
authors.lastname: Kashiwagi
authors.forename: Kouji
authors.initials: K
authors.lastname: Kaiso
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matsumoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Yoshimoto
mesh_terms: D002264:Carboxylic Acids / Q000737:chemistry*; D009757:Nylons / Q000737:chemistry*; D059027:Recycling / Q000379:methods*; D018505:Waste Management / Q000379:methods*
chemical_list: D002264:Carboxylic Acids; D009757:Nylons; C036222:nylon 12
keywords: chemical recycling; nucleophilic substitution; polyamides; supercritical fluids; value-adding depolymerization