PRODUCTION OF CATALYST FOR PURIFICATION OF EXHAUST GAS

PROBLEM TO BE SOLVED: To efficiently obtain a catalyst for purification of exhaust gas having high performance and excellent durability by depositing copper with high density in a high distribution state even into the inside of micropores of zeolite. SOLUTION: This catalyst for purification of exhaust gas is produced by incorporating a copper component into an inorg. material containing porous crystalline aluminosilicate as the main component. In this production process, a carbonyl salt [(Cu(NH3 )6 9147/28]CO3 soln. in water of copper amine complex is brought into contact with aluminosilicate to deposit the Cu component on the carrier. Moreover, it is preferable to control both of the pH of the carbonyl salt soln. in water the copper ammine complex and the pH of the mixture soln. when the carbonyl salt of the copper amine complex is brought into contact with the porous polycrystalline aluminosilicate to 8.3 to 11.0.