| 摘要 |
<p>PURPOSE:To obtain an air purifying agent excellent in the removing efficiency of SO2, NO2 or the like in the air generating the fading of an art object and the corrosion of the parts of communication equipment and an electronic calculator and diffusing no harmful reaction product by adding copper iodide and one or more kind of hydroxide, oxide and carbonate of a metal of the Group I or II of the Periodic Table to a carbonaneous substance. CONSTITUTION:Copper iodide and one or more kind of potassium hydroxide, sodium hydroxide, calcium hydroxide, copper hydroxide, copper oxide, silver oxide, calcium oxide, calcium carbonate, copper carbonate or potassium carbonate are added to a carbonaceous substance such as graphite, carbon black or activated carbon. In this case, since copper iodide is hardly soluble in water, said copper iodide is dissolved in an ammonium solution before addition and the resulting composition is immersed in an alkaline solution and dried under heating to strip NH3. A substance hardly soluble in water like copper oxide is also dissolved in an aqueous ammonium hydroxide solution before addition and the above mentioned stripping is performed.</p> |
