MANGANESE AND FERRITE CATALYST

摘要

PURPOSE:To efficiently decompose high-concn. ozone at ordinary temp. by using a manganese and ferrite catalyst. CONSTITUTION:Manganese salt and iron salt of inorganic acid or organic acid easily generating carbon dioxide by heating are coprecipitated e.g. from both a mixed soln. of soluble salt of manganese and iron and ammonium formate, ammonium oxalate, ammonium malonate or ammonium carbonate, etc. Then this coprecipitate is dried, calcined and molded to prepare a manganese and ferrite catalyst. The obtained catalyst shows high performance of ozone decomposition even at low temp. of -10-50 deg.C preferably 0-40 deg.C and extremely small decrease of activity. Further high-concn. ozone reaching several ten thousands of ppm can be efficiently decomposed. Furthermore its activity is extremely high even in the simultaneous decomposition and removal of both compd. selected from carbon monoxide and hydrocarbon and ozone in the presence of oxygen.