Heterogeneous catalysts for the cyclization of dicarboxylic acids to cyclic anhydrides as monomers for bioplastic production. Issue 14 (21st April 2017)

• Record Type: Journal Article
• Authors: Rashed, Md. N.; Siddiki, S. M. A. H.; Ali, Md. A.; Moromi, Sondomoyee K.; Touchy, Abeda S.; Kon, Kenichi; Toyao, Takashi; Shimizu, Ken-ichi
• Is Part Of: Green chemistry. Volume 19:Issue 14(2017)
• Page Start: 3238
• Page End: 3242
• Publication Date: 2017-04-21
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/c7gc00538e
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : Niobic acid catalyzes the condensation of biomass-derived dicarboxylic acids into cyclic anhydrides, key intermediates of carbon-neutral and biodegradable polyesters. Abstract : Cyclic anhydrides, key intermediates of carbon-neutral and biodegradable polyesters, are currently produced from biomass-derived dicarboxylic acids by a high-cost multistep process. We present a new high-yielding process for the direct intramolecular dehydration of dicarboxylic acids using a reusable heterogeneous Lewis acid catalyst, Nb2 O5 · n H2 O. Various dicarboxylic acids, which can be produced by a biorefinery process, are transformed into the corresponding cyclic anhydrides as monomers for polyester production. This method is suitable for the production of renewable polyesters in a biorefinery process.