METHOD OF PREPARING CATALYST FOR HYDROFINING OIL STOCK Russian patent published in 1998 - IPC

FIELD: petroleum processing. SUBSTANCE: aluminum hydroxide catalyst is impregnated by solution containing molybdenum, phosphorus, and cobalt or nickel compounds, which solution is prepared from ammonium paramolybdate, phosphoric acid and hydrogen peroxide with Mo/P atomic ratio 2.5 and hydrogen peroxide/Mo molar no higher than 0.4 followed by addition of ammonium peroxomolybdophosphate with general formula [P₂Mo₅O_23-x(O₂)_x](NH₄)₆, where x=2 or 2, cobalt or nickel nitrate, pH of solution being maintained within the range 1.0-2.6 and Ni(Co)/Mo/P atomic ratio being (0.8-1.8):(1.1-2.5):1. EFFECT: increased catalytic activity in respect to hydrogenolysis of nitrogen-containing compounds in oil stock. 2 tbl