One pot transformation of citronellal to menthol over Ni/gamma-Al2O3 (Articolo in rivista)

Type
Label
  • One pot transformation of citronellal to menthol over Ni/gamma-Al2O3 (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Dhiaul Iftitah, E.; Muchalal, M.; Trisunaryanti, W.; Armunanto, R.; Psaro, R.; Ravasio, N.; Santoro, F.; Sordelli, L. (2011)
    One pot transformation of citronellal to menthol over Ni/gamma-Al2O3
    in The journal of applied sport science research (Print)
    (literal)
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  • Dhiaul Iftitah, E.; Muchalal, M.; Trisunaryanti, W.; Armunanto, R.; Psaro, R.; Ravasio, N.; Santoro, F.; Sordelli, L. (literal)
Pagina inizio
  • 680 (literal)
Pagina fine
  • 689 (literal)
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  • 7 (literal)
Rivista
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  • Journal of Applied Sciences Research Country: Pakistan Subject Area: Multidisciplinary Subject Category: Multidisciplinary Publisher: International Network for Scientific Information Publication (INSI). Publication type: Journals. ISSN: 1816157X (literal)
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  • Department of Chemistry, University of Brawijaya, Jl. Veteran, Malang, Indonesia. Department of Chemistry, University of Gadjah Mada, Jl. Sekip Utara, Jogjakarta, Indonesia. Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, via Golgi 19, I-20133 Milano, Italy (literal)
Titolo
  • One pot transformation of citronellal to menthol over Ni/gamma-Al2O3 (literal)
Abstract
  • Citronella oil from Cymbopogon winterianus is widely produced in Indonesia (Java type). A way to increase the value of this product is to transform citronellal contained in the oil into menthol, one of the most sought after fragrance products. The one pot citronellal to menthol transformation is also a war horse of tandem reactions over heterogeneous catalysts. Here we wish to report our results in the one pot transformation of citronellal into menthol over a Ni/Al2O3 catalyst. While alumina showed to be a poor catalyst for the transformation of citronellal into isopulegol, ZnBr2 modified alumina allowed to obtain very fast formation of isopulegol. However, when Ni was supported on the modified alumina and used under hydrogenation conditions only isopulegol was obtained even after long reaction times. On the contrary a 10% Ni/ Al2O3 catalyst showed fairly good activity. These results can be ascribed to very big differences in Ni particle size and to reduced surface area of the Zn containing catalyst. (literal)
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