Preparation method of nickel phosphide

On the premise of deep hydrodesulfurization, the main problem in diesel fuel's hydrotreatment is to rid the refractory sulfide and hydrogenate polycyclic aromatic hydrocarbon. Loaded nickel phosphide catalyst demonstrates higher hydrodesulfurization activity and better activity stability. However, the traditional nickel phosphide catalyst is prepared by temperature programming of nickel phosphide, so that dispersion degree of active components is low. In the invention, through solid-phase reaction between phosphorous acid ions and nickel ions, bulk phase and loaded nickel phosphide catalyst with higher active component dispersion degree and fine catalytic activity are obtained at low temperature. The invention is applicable to diesel oil hydroprocessing.