2 Zeolite structures with specific Cu2+ / Cu2+ ratio in NO DRIFTS spectrum a method for preparing zeolite structures and a catalyst composition comprising the zeolite structures

摘要

The present invention relates to a zeolite having supported thereon Cu ²⁺ (α) and Cu ²⁺ (β) having different NO degrees of bonding at a specific ratio, and the zeolite is chaebazite type (CHA) zeolite, (CHA) zeolite in which divalent copper ions having an NO adsorption area ratio of at least 80% of Cu ²⁺ (α) / Cu ²⁺ (β) after 180 seconds exposure are supported. And also to a process for preparing an ion exchange zeolite in a slurry state and to a catalyst comprising the specified chafer type (CHA) zeolite