Na~+、Cu~(2+)离子水热交换包头天然沸石的组成和结构

用离子水热交换法将官牛犋丝光沸石和白庙子斜发沸石分别进行Ｎａ＋、Ｃｕ２＋离子改性。用化学分析、ＸＲＤ、ＦＴ－ＩＲ、ＤＴＡ－ＴＧ等技术对其表征。试验结果说明，两种沸石均属Ｃａ型矿样，阳离子交换容量均未达到理论值，分别为０１０１和０１７３ｍｏｌ／１００ｇ。同时，由于离子交换、骨架配位环境的变化对矿样的晶胞参数、结晶度、Ｔ—Ｏ键反对称伸缩振动、沸石水和结构水数量都产生一定影响。并且Ｎａ＋离子配位能明显抑制结构脱水。但是，经水热离子交换后，沸石骨架结构仍保持其基本特征。

Composition and Structure of Baotou Natural Zeolites Treated with Hydrothermal Na+ and Cu2+ Ion Exchange

Guanniuju mordenite and Baimiaozi clinoptilolite were treated by Na + and Cu 2+ ion hydrothermal exchange, and their physical-chemical properties were characterized by chemical analysis,XRD,FT-IR and DTA-TG techniques.Experimental results show that the two natural zeolites belong to calcium form zeolites and the cation exchange capacity(CEC) are 0 101 and 0 173 mole/100g,respectively,with CEC values below the corresponding theoretical levels due to framework coordination defects of zeolite crystal.Meanwhile,the cell parameter and crystallinity,asymmetric stretch vibration of T O bond,zeolite water and structural water of the treated samples were influenced to a certain extent due to change in framework’s coordination environment.Moreover Na + ion coordinated in framework can apparently inhibit structural dehydration,with,however,the basic characteristics of the framework structure being retained still after Na + and Cu 2+ ion exchange.