Ag0 and Co0 nanocolloids as recyclable quasihomogeneous metal catalysts for the hydrogenation of α,β-unsaturated aldehydes to allylic alcohol fragrances

Highly selective hydrogenation of furfural over supported Pt nanoparticles under mild conditions

“…Strong support and solvent dependencies were observed, with methanol and n-butanol proving excellent solvents for promoting high furfuryl alcohol yields over uniformly dispersed Pt nanoparticles when using MgO, CeO 2 and ␥-Al 2 O 3 as supports at 50 • C and atmospheric hydrogen pressure. In contrast, non-polar solvents conferred poor furfural conversion, while ethanol favored acetal by-product formation, as commonly reported in the literature [12,[21][22][23][24][25].…”

“…Notably the addition of water forces the back reaction to furfural. The addition of base has also been found to hinder the reaction as the acetalization process is acid catalyzed [24,25]. Merlo and co-workers reported an ether side product, 2-isopropoxymethylfuran, during furfural hydrogenation in 2-propanol at 10 bar and 100 • C, formed with 3.6% selectivity over a PtSn catalyst and 22% over NiSn catalyst [22,23,32].…”

“…The acetalization of aldehydes, including furfural, in alcoholic solvents is commonly reported in the literature (Schematic S1), but is often unquantified [12,[22][23][24][25]31]. Notably the addition of water forces the back reaction to furfural.…”

Chemoselective C=O Hydrogenation of α,β-unsaturated Carbonyl Compounds over Quasihomogeneous and Heterogeneous Nano-Au0 Catalysts Promoted by Lewis Acidity

“…We have previously addressed this challenge by preparing polyvinylpyrrolidone (PVP) stabilized sols of Au or other metals (e.g., Ag, Co) via borohydride reduction in amide solvents, e.g., N,N-dimethylformamide (DMF) [17,18]. The cluster size in such metal sols can be varied by changing the PVP/Au ratio in the synthesis.…”

Multifunctional weak polyelectrolyte multilayers for membrane applications

“…SRNF has a great potential to be applied in a wide range of processes in different industries such as food [122][123][124][125][126][127], petrochemical [121,[128][129][130][131][132][133], pharmaceutical [125,[134][135][136][137][138][139] and fine chemical [140][141][142][143][144][145][146][147], to separate desired molecules from solvents and/or to recover solvents and solutes from waste streams. The benefits of implementing SRNF in food industry, especially for edible oil are substantial.…”