33023 ⎘
Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites; Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups - containing iron group metals, noble metals or copper EMT-type, e.g. EMC-2, ECR-30, CSZ-1, ZSM-3 or ZSM-20