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Publisher DOI: 10.1080/17518253.2021.1943006
Title: An innovative approach for fatty acid reduction to fatty aldehydes
Language: English
Authors: Johannsen, Jens  
Baek, Gayoung 
Fieg, Georg 
Waluga, Thomas 
Keywords: Fatty aldehydes;Green chemistry;renewable resources
Issue Date: 20-Jun-2021
Publisher: Taylor and Francis
Source: Green Chemistry Letters and Reviews 14 (3): 454-460 (2021)
Journal: Green chemistry letters and reviews 
Abstract (english): 
The increasing demand for fatty aldehydes as natural flavoring agents nowadays grapples with current production processes requiring harsh reaction conditions and hazardous chemicals. Our research group proved the concept of an innovative, sustainable process based on renewable plant oils for fatty aldehyde production: fatty acids reduction via zerovalent iron. In this study, we present for the first time extensive supporting data characterizing the metal particles used as co-reactants and the core step of the reaction, with varying process parameters. Furthermore, process improvement is demonstrated in that addition of fatty ester-obtained alcohol regenerates metal particles, thereby increasing process yield and selectivity as well as avoiding resource waste. Hexanoic acid reduction to hexanal in the presence of iron particles was used as a reference reaction system, generating a 40% hexanoic acid conversion using Fe 36 µm-particles. To increase overall process sustainability, we explored the possibility of an in toto exploitation of the starting materials (esters) through an a posteriori reduction of the oxidized iron, exemplarily with the alcohol hexanol. The hexanoic acid conversion rate was thereby increased to 83%, while a 44-fold increase in hexanal yield was observed.
DOI: 10.15480/882.3634
ISSN: 1751-7192
Institute: Systemverfahrenstechnik V-4 
Document Type: Article
Project: Publikationsfonds 2021 
More Funding information: This work was supported by Free and Hanseatic City of Hamburg [grant number LFF-FV43].
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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