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Title: Zirconia catalysts in meerwein-ponndorf-verley reduction of citral
Authors: Zhu, Y.
Liu, S. 
Jaenicke, S. 
Chuah, G. 
Keywords: Geraniol
Grafted zirconium 1-propoxide
Hydrous zirconia
MPV reduction of citral
Zr-zeolite beta
Issue Date: 3-Nov-2004
Citation: Zhu, Y., Liu, S., Jaenicke, S., Chuah, G. (2004-11-03). Zirconia catalysts in meerwein-ponndorf-verley reduction of citral. Catalysis Today 97 (4 SPEC. ISS.) : 249-255. ScholarBank@NUS Repository.
Abstract: Zirconium-containing catalysts were found to be active in the Meerwein-Ponndorf-Verley (MPV) reduction of citral. Good activity and selectivity to the reduced alcohol, geraniol and nerol, were observed over hydrous zirconia and zirconium 1-propoxide supported on silica. In particular, hydrous zirconia calcined at temperatures below 300°C was highly active. Hydrous zirconia catalysts modified by NaOH, NH4F, PO 4 3- and SO4 2- had lower activity. Surface hydroxyl groups are postulated to be involved in ligand exchange with the reductant, 2-propanol. Zr-zeolite beta showed high activity, but poorer selectivity than the other two samples, due to subsequent dehydration of the product formed. For all catalysts, the trans-isomer of citral was preferentially reduced over the cis-isomer. © 2004 Elsevier B.V. All rights reserved.
Source Title: Catalysis Today
ISSN: 09205861
DOI: 10.1016/j.cattod.2004.07.002
Appears in Collections:Staff Publications

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