A method for in-situ regeneration of deactivated fixed-bed Raney nickel catalyst

Abstract

The present invention relates to a method for in-situ regeneration of a deactivated fixed-bed Raney nickel catalyst, comprising: sequentially introducing an organic solvent and deionized water into a fixed bed under a nitrogen atmosphere to wash the catalyst; drying the catalyst surface with nitrogen, then reducing the catalyst with a hydrogen-nitrogen mixture or hydrogen; purging with N2 to cool the catalyst, then treating the catalyst surface with a CO and N2 mixture; purging the bed with N2; introducing deionized water into the reactor from the bottom of the fixed bed, then treating the catalyst with a NaOH solution; and washing the catalyst with deionized water until the pH value reaches 7 to 9, thereby obtaining a regenerated catalyst. The method is simple to operate, easy to implement, has a high regeneration rate, and the regenerated Raney nickel catalyst can achieve the desired hydrogenation effect.