Bifunctional and recyclable Dawson-type polyoxometalates catalyze oxidative degradation of lignocellulose to selectively produce phthalates. (February 2019)

• Record Type: Journal Article
• Authors: Shi, Nan; Liu, Dong; Dang, Falu; Chen, Qingtai; Li, Min; Wen, Fushan
• Is Part Of: Bioresource technology. Volume 273(2019)
• Page Start: 677
• Page End: 681
• Publication Date: 2019-02
• Subjects: Polyoxometalates -- Lignocellulose -- Catalysis -- Oxidative decomposition -- Recycle; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.11.047
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Decomposition of lignocellulose was catalyzed by acid-redox Dawson-type POMs. The total yield of the small compounds achieved 16.75%. The selectivity of the dominating product diisobutyl phthalate was 75.67%. The catalyst was recycled for three times without obvious deactivation. Abstract: Acid-redox bifunctional Dawson-type polyoxometalates K6 P2 W18 O62 (P2 W18 ) and K10 P2 W17 O61 (P2 W17 ) were introduced as the new-type catalysts in oxidative decomposition of lignocellulose. The lignin and hemicellulose ingredients of lignocellulose could be decomposed by P2 W17 to produce diisobutyl phthalate with the selectivity of 75.67% and other aromatic and aliphatic compounds under mild conditions, evidently differed from other POMs-catalyzed lignocellulose depolymerization in which aromatic ketones and phenols were the main compounds. Diisobutyl phthalate was obtained from the oxidation of Cα -OR and α-OH of the phenyl structure. The catalyst could be recycled for three times without obvious deactivation. This is the first report of lignocellulose decomposition catalyzed by Dawson-type polyoxometalates to selectively produce phthalates.