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丝光沸石的催化性能与其所含阳离子的种类、位置有密切关系.R.M.Barrer,F.Wolf等广泛研究了合成丝光沸石的阳离子交换,由离子交换等温线推论交换过程的性质.本文试图以X光衍射法来研究离子交换过程,观察X光衍射图谱随交换度的变化关系,获得有关交换的一些信息.显然,若交换过程伴随着脱铝,亦会引起X光衍射图谱与晶格常数的改变.因此,必须选择适当的体系使交换时不存在骨架的脱铝. 鉴于在丝光沸石的催化研究中,酸交换与铝交换具有特殊重要性,本文研究了下列两个体系: (1)在25℃,以约0.04N的HAC溶液(pH≥3.1)交换合成NaM.据R.M.Barrer
The catalytic properties of mordenite are closely related to the type and position of cations contained therein .RMBarrer and F.Wolf et al. Have extensively studied the cation exchange of synthetic mordenite and the nature of the exchange process deduced from ion exchange isotherms.In this paper, Diffraction method to study the ion exchange process and observe the X-ray diffraction pattern with the relationship between the degree of exchange to get some information about the exchange.It is clear that if the exchange process accompanied by dealumination will also cause X-ray diffraction patterns and lattice constant changes. Therefore, the proper system must be chosen so that there is no dealumination of the framework during the exchange.While the acid exchange and aluminum exchange are of special importance in the catalytic study of mordenite, the following two systems are studied in this paper: (1) , With about 0.04N HAC solution (pH ≥ 3.1) exchange synthesis NaM. According to RMBarrer