PROCEDURE FOR RECOVERY OF RUTHENIUM FROM CATALYST WASTE OF ALUMINUM OXIDE LOADED WITH RUTHENIUM

摘要

A method for recovering ruthenium from waste catalyst of aluminum oxide loaded with ruthenium comprises the following steps: drying, roasting and cooling the waste catalyst of aluminum oxide loaded with ruthenium; grinding into black powder containing ruthenium oxide; placing the black powder into a fluid bed reactor, introducing hydrogen and performing reduction reaction, thereby obtaining metal Ru; introducing a mixed gas of oxygen and ozone into the fluid bed reactor and oxidizing the waste catalyst, thereby obtaining RuO 4 gas; introducing the RuO 4 gas into sufficient hydrochloric solution to dissolve the RuO 4 gas, thereby obtaining an H 3 RuCl 6 solution; adding excessive oxidant into the H 3 RuCl 6 solution and promoting the H 3 RuCl 6 to be fully oxidized, thereby generating hexachloro (IV) ruthenium acid; adding excessive NH 4 Cl, reacting, filtering and cleaning filter cake, thereby obtaining an ammonium hexachloro (IV) ruthenium solid; and finally, performing hydrogen reduction treatment on the ammonium hexachloro (IV) ruthenium solid, thereby obtaining the metal ruthenium. The method is simple in operation, low in cost, short in recovering period and high in recovery ratio.