Gas-phase oxidative dehydrogenation of long chain alkenols for the production of key fragrance ingredients: from Rosalva isomers to Costenal analogues. Issue 4 (11th January 2023)

• Record Type: Journal Article
• Authors: De Maron, Jacopo; Tabanelli, Tommaso; Ospitali, Francesca; Lopez Cruz, Carlos; Righi, Paolo; Cavani, Fabrizio
• Is Part Of: Catalysis science & technology. Volume 13:Issue 4(2023)
• Page Start: 1059
• Page End: 1073
• Publication Date: 2023-01-11
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d2cy01836e
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Continuous-flow, gas-phase selective oxidative dehydrogenation (ODH) of unsaturated long chain alcohols ( i.e. decen-1-ol isomers) to the corresponding aldehydes over an innovative, highly dispersed Cu-based catalyst supported over ferrite. Abstract : The continuous-flow, gas-phase oxidative dehydrogenation (ODH) of an actual mixture of decen-1-ol isomers ("Isorosalva" alcohol) towards the corresponding mixture of aldehydes ("Costenal" analogues, valuable ingredients in perfumes formulation) is herein reported for the first time over noble metal-free catalysts. In particular, the optimisation of the reaction conditions over a copper ferrite (Cu/Fe/O), as well as dedicated characterizations and comparisons between the fresh, the post-reaction (reduced) and regenerated (re-oxidised) catalytic material, allowed us to underline the key role of well dispersed copper oxide over a Fe-enriched spinel in promoting the selective ODH of Isorosalva alcohol. The superior catalytic activity and selectivity of CuO/γ-Fe2 O3 synthesized ad hoc were attributed to the very high dispersion of Cu over the support as well as to a cooperative effect between Cu and Fe species in promoting the redox cycle.