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稀土-Y 分子筛通常是用二交二焙方法制得。八面沸石型分子筛 Na~+-La~(+++)交换等温线工作表明,交换过程分为两步:第一步是 La~(+++)水合离子与超笼中的 Na~+交换;第二步是与β笼中的 Na~+交换。第一步快,第二步慢,慢的原因是 La~(+++)水合离子(直径7.92(?))要通过β笼窗口(直径2.6)进入β笼需要脱水(脱水后 La~(+++)直径是2.3。一次交换后的焙烧就是使进入超笼的 La~(+++)水
Rare earth-Y zeolite is usually used to make two cross two baking methods. The zeolite zeolite Zeolite Na ~ + -La ~ (+++) exchange isotherms work shows that the exchange process is divided into two steps: the first step is La ~ (+++) hydrated ions and the super cage Na ~ The second step is to exchange Na + with β cage. The first step is fast and the second step is slow and slow because La ~ (+++) hydrated ions (diameter 7.92 (?)) Pass through the beta cage window (diameter 2.6) into the cage and require dehydration +++) has a diameter of 2.3. The roasting after one exchange is to make La ~ (+++) water into the supercage