Production of polyalcohol at high-pressure hydrogenation of cane sugar and hydrolyzed amides

Hydrogenation of Sugars to Sugar Alcohols in the Presence of a Recyclable Ru/Al2O3 Catalyst Commercially Available

“…Nickel-based catalysts like Raney nickel promoted or not with transition metals (Cr, Fe, Sn, Mo) were firstly study and used at industrial level for the hydrogenation of sugars to sugar alcohols. [9][10][11][12][13][14][15][16][17][18] Thus, sorbitol is industrially produced from a glucose solution in both autoclave and trickle bed reactors at around 110-150°C. But the continuous process needs higher hydrogen pressure (100 bar against 40 to 70 bar in a batch process).…”

“…Sugar alcohols can be produced from the catalytic hydrogenation of sugar monomers (contained in the carbohydrate part of lignocellulose). Nickel-based catalysts like Raney nickel promoted or not with transition metals (Cr, Fe, Sn, Mo) were first studied and used at an industrial level for the hydrogenation of sugars to sugar alcohols. − However, in the presence of the Ni-based catalysts, the selectivity was low due to side reactions (degradation of sugars) because of the high hydrogen pressure and temperature required in the hydrogenation of sugars to sugar alcohols. Moreover, Ni catalysts suffer from a lack of stability.…”