93967 ⎘
Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites, pillared clays; Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the type L containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium