Activated carbon and alkaline earth metal silicate are respectively added 10-50%, 20-40% on the solid substance basis to A type zeolite. After mixing the mixture in the flow shear mixer, the solution of molasses and water is injected by a nozzle and kneaded it to make a particulate composition of the grain size of 0.5-5mm. The surface of this composition is coated by molasses and dried in the forced convection drier, putting in an electric furnace kept to the temperature of 500-800 degree C in the inert atmosphere such as nitrogen or water gas for 0.5-4.0 hours, and thus a particulate complex molecule composition are produced.
