一、引言合成 NaY 型分子筛用多价阳离子将其Na~+交换后具有很高的催化活性。影响这类催化剂催化性能的因素很多,骨架外阳离子在分子筛结构中的位置是重要的影响因素之一。1960年以来国外关于分子筛中骨架外阳离子位置的测定已有不少报道。我们选择了 LaY 分子筛和 REY 分子筛作为 I. INTRODUCTION The synthesis of NaY-type molecular sieve with multivalent cation exchange Na ~ + has a high catalytic activity. There are many factors that affect the catalytic performance of these catalysts. The position of the extra-framework cations in the molecular sieve structure is one of the important factors. Since 1960, there have been many reports on the determination of the cation position outside the framework in molecular sieves. We chose LaY zeolite and REY zeolite as