Catalytic Hydrogenation of Benzaldehyde for Selective Synthesis of Benzyl Alcohol: A Review. Issue 13 (30th August 2016)

• Record Type: Journal Article
• Authors: Bhanushali, Jayesh T.; Kainthla, Itika; Keri, Rangappa S.; Nagaraja, Bhari Mallanna
• Is Part Of: ChemistrySelect. Volume 1:Issue 13(2016)
• Page Start: 3839
• Page End: 3853
• Publication Date: 2016-08-30
• Subjects: Hydrogenation -- Benzaldehyde -- Benzyl alcohol -- Heterogeneous catalysts -- Transition metals; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201600712
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: In the recent past, various catalysts have been used for hydrogenation of benzaldehyde to benzyl alcohol and the efficiency of the catalysts observed is found to be less.This review focuses on catalytic hydrogenation and their parameters associated with supports, methods of preparation, solvents involved, reaction conditions in converting benzaldehyde to benzyl alcohol. Critical aspect of review is to evaluate activities of various heterogeneous catalysts that can selectively reduce benzaldehyde to benzyl alcohol. The catalysts include various transition (Ni, Cu, Co) and noble metals (Au, Pt, Pd, Ru), monoliths and metal oxides (MgO, CaO, BaO, Al2 O3, CeO2, ZrO2, etc., ), which are all active in the reaction. Among the transition metals, cobalt‐based catalysts depicted promising activity, while ruthenium‐based systems demonstrated spectacular activity among noble metal series. Hydrogenation by electrochemical reduction using platinum, palladium, nickel has also been reviewed. Abstract : The benzyl alcohol is industrially important chemical due to its enormous applications in petrochemical industry. The catalytic hydrogenation of benzaldehyde involves various metal and metal oxides based supported catalysts. Typically, noble metals and transition metals along with the supports are found to be active for the reaction which is depicted in the figure. The reaction is generally carried out at temperature ranging from 293‐676 K. In this graphical abstract, we have tried to portray these mentioned features in a simple way.