2024-03-29T02:12:15Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2188982020-09-01T01:26:01Zcom_10261_31com_10261_3col_10261_284
Continuous flow synthesis of menthol via tandem cyclisation–hydrogenation of citronellal catalysed by scrap catalytic converters
Zuliani, Alessio
Cova, Camilla Maria
Manno, Roberta
Sebastián, Víctor
Romero, Antonio A.
Luque, Rafael
Ministerio de Economía y Competitividad (España)
European Commission
A continuous flow synthesis of menthol starting from citronellal catalysed by scrap catalytic converters is reported. The reaction was conducted in a tandem system connecting in series two catalytic systems, with the first having Lewis acid properties (favouring the cyclisation of citronellal to isopulegols) and the second having hydrogenation catalytic activity (catalysing the hydrogenation of isopulegols to menthols). A Lewis acid catalyst was prepared by supporting iron oxide nanoparticles over a waste material, i.e. the ceramic core of scrap catalytic converters (SCATs) via a microwave assisted method. Most importantly, SCATs, containing a low residual noble metal content, could be directly employed in the second step as hydrogenation catalysts. The reaction was performed studying the influence on the yield and selectivity to (−)-menthol of various reaction parameters (T, p and flow rate). Under the best reaction conditions (at a flow rate of 0.1 mL min−1 and at 373 K and 413 K for cyclisation and hydrogenation steps respectively) a conversion of >99% of (+)-citronellal to (−)-menthol with 77% final yield was achieved.
Rafael Luque gratefully acknowledges the funding from the MINECO under project CTQ2016-78289-P, co-financed by the FEDER and the contract for Camilla Maria Cova associated with this project. This project received funding from European Union's Horizon 2020 research and innovation programme under Marie Skłodowska-Curie grant agreement no. 721290. The publication was prepared with support from RUDN University program 5-100.
Peer reviewed
2020-08-31T11:05:00Z
2020-08-31T11:05:00Z
2020
artículo
http://purl.org/coar/resource_type/c_6501
Green Chemistry 22(2): 379-387 (2020)
1463-9262
http://hdl.handle.net/10261/218898
10.1039/C9GC03299A
1463-9270
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003329
en
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/H2020/721290
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2016-78289-P
https://doi.org/10.1039/C9GC03299A
Sí
none
Royal Society of Chemistry (UK)