TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: Complex oxide containing copper is produced and baked. The baked complex oxide is molded. The complex oxide which contains copper is made to support nickel. Alternately, aqueous solution containing copper and nickel is dropped in the oxide deposit and the produced complex oxide deposit is baked. The oxide precipitate is further baked and the desulfurizing agent is reduced. The desulfurization is carried out at normal temperature or 500degreesC.Preferred System: The reformer is equipped with a desulfurizing apparatus.Preferred Substances: The precipitation-reagent aqueous solution is sodium carbonate or sodium hydrogencarbonate. The desulfurizing agent is complex oxide which consists of zinc, aluminum, chromium, and copper. Nickel is further supported to the complex oxide support which consists of zinc, aluminum, chromium and copper. EXAMPLE - Sodium carbonate (2.5 mol) was dissolved in water and heated at 70degreesC and aqueous alkali solution (B) was prepared. Zinc nitrate hexahydrate (0.225 mol) and aluminum hydrate nonahydrate (0.075 mol) were dissolved in water, heated at 70degreesC and acidic solution (A) was prepared. Copper nitrate (0.3 mol) was dissolved in water, heated at 70degreesC and acidic solution (C) was prepared. The solution (B) was uniformly dropped into solution (A) over 30 minutes and suspension liquid (D) was obtained. Solution (C) was dropped over 30 minutes after dripping completion of solution (B), and deposit (G) was obtained. The mixture was cured for 1 hour, washed and dried at 100degreesC for 24 hours and baked at 300degreesC for 3 hours, and copper oxide-zinc oxide-alumina complex oxide was obtained. Graphite carbon (2 wt.%) was added to the complex oxide, molded and the molded pellet was immersed in nickel nitrate aqueous solution, stirred and solvent was volatilized. The oxide was baked at 300degreesC for 3 hours and desulfurizing agent was produced. The desulfurizing agent was used for desulfurizing liquefied petroleum gas, and had excellent desulfurizing ability.