A Reusable Co Catalyst for the Selective Hydrogenation of Functionalized Nitroarenes and the Direct Synthesis of Imines and Benzimidazoles from Nitroarenes and Aldehydes

2016 ◽  
Vol 55 (48) ◽  
pp. 15175-15179 ◽  
Author(s):  
Tobias Schwob ◽  
Rhett Kempe
Keyword(s):  
Selective Hydrogenation ◽  
Direct Synthesis ◽  
Co Catalyst

scholarly journals Selective hydrogenation of nitroarenes using an electrogenerated polyoxometalate redox mediator

2018 ◽  
Vol 54 (9) ◽  
pp. 1093-1096 ◽  
Author(s):  
Lewis MacDonald ◽  
Benjamin Rausch ◽  
Mark D. Symes ◽  
Leroy Cronin
Keyword(s):  
Selective Hydrogenation ◽  
Redox Mediator ◽  
Reduced Form ◽  
Silicotungstic Acid ◽  
Co Catalyst

The 2-electron reduced form of the polyoxometalate silicotungstic acid (H4[SiW12O4]) is shown to be an effective and selective hydrogenation agent for a range of nitroarenes without the need for any co-catalyst.

Direct synthesis of hybrid layered double hydroxide–carbon composites supported Pd nanocatalysts efficient in selective hydrogenation of citral

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33199-33207 ◽  
Author(s):  
Ruirui Han ◽  
Chunshi Nan ◽  
Lan Yang ◽  
Guoli Fan ◽  
Feng Li
Keyword(s):  
Layered Double Hydroxide ◽  
Selective Hydrogenation ◽  
Direct Synthesis ◽  
Carbon Composites ◽  
Double Hydroxide ◽  
Facile Route ◽  
Supported Pd

A facile route for the synthesis of hybrid layered double hydroxide–carbon composites supported Pd nanocatalysts efficient in the selective hydrogenation of citral.

scholarly journals Selective Hydrogenation of Sucrose into Sugar Alcohols over Supported Raney Nickel-Based Catalysts

2019 ◽  
Vol 19 (1) ◽  
pp. 183 ◽  
Author(s):  
Rodiansono Rodiansono ◽  
Maria Dewi Astuti ◽  
Dwi Rasy Mujiyanti ◽  
Uripto Trisno Santoso
Keyword(s):  
Selective Hydrogenation ◽  
High Performance ◽  
High Dispersion ◽  
Sugar Alcohols ◽  
Ni Catalysts ◽  
Co Catalyst ◽  
Amberlyst 15 ◽  
Raney Ni ◽  
Crystallite Sizes ◽  
Supporting Materials

Selective hydrogenation of sugars (e.g. sucrose, cellobiose, glucose, fructose, xylose, arabinose) into sugar alcohols (sorbitol, mannitol, xylitol, arabitol) can be achieved by means of supported Raney Ni-based catalysts. Various supporting materials such as the layered structure of clay (e.g. bentonite, taeniolite, smectite), metal oxides (e.g. Nb2O5, ZrO2, Al2O3), and conventional supports (e.g. carbon, silica, zeolite (JRC-SZ1)) were employed to obtain high performance of supported Raney Ni-based catalysts. The conventional Raney Ni, Raney Ni/AlOH, and Ni-NP with relatively high dispersion exhibited superior catalytic activity compared with the various supported Raney Ni catalysts with the conversion of 100% and hexitols selectivity almost ~99%. The H2 treatment of Raney Ni/SMT at a temperature of 473–773 K caused the increase in Ni(111) crystallite sizes as the conversion of sucrose with compromised decreased of hexitols product. The presence of acidic co-catalyst such as SnO, amberlyst-15, JRC-SZ1, JRC-Z5-9OH1 on Raney Ni/AlOH catalyst significantly enhanced the formation of glycerol product even though the conversion of sucrose compromised decreased owing to the partial leaching of Ni metal into the reaction mixture.

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