Deactivation of Ni/SiO2/Al2O3-catalyst in hydrogenation of 3-hydroxypropanal solution

New diol processes: 1,3-propanediol and 1,4-butanediol

“…This results in the necessity of further steps to separate the so formed contaminants and may be observed in particular with suspended catalysts such as Raney nickel. Nickel fixed bed catalysts also entail the risk of product contamination with nickel compounds in small quantities [11,12]. Therefore the nobel metal-based catalysts are superior.…”