Ion exchange in the synthetic gismondine, zeolite MAP
Ion exchange in the synthetic gismondine, zeolite MAP
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DOI：
10.1039/b111490p
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发表时间：
2002-01-01
影响因子：
3.3
通讯作者：
Heywood, B
中科院分区：
文献类型：
--
作者：
Allen, S;Carr, S;Heywood, B
研究了MAP沸石的离子交换作用，MAP沸石是一种合成的吉斯芒定，用作工业洗涤剂助洗剂。沸石被充分表征，并显示在整个三年的研究期间是稳定的相。所检测的离子对为NaLi、K、Rb、Cs和Na（1）/Mg-2、Ca、Sr、Ba。通过粉末X射线衍射（PXRD）、魔角旋转（MAS）NMR和热分析来检查制备的所有阳离子形式。当阳离子交换被证明是可逆的，他们的等温线进行了分析，以产生热力学数据。然后将这些值与类似沸石交换获得的文献值进行比较。结构数据（PXRD，MASNMR）表明，阳离子交换往往会导致改变晶胞对称性，以及创建不混溶相丰富的端员时，钙和锶是进入阳离子。
Ion exchange has been studied in zeolite MAP, a synthetic gismondine used as a commercial detergent builder. The zeolite was fully characterized and shown to be a stable phase throughout the three year period of study. The ions pairs examined were; NaLi, K, Rb, Cs and Na(1)/Mg-2, Ca, Sr, Ba. All cation forms prepared were examined by powder X-ray diffraction (PXRD), magic-angle spinning (MAS) NMR and thermal analysis. When cation exchanges were shown to be reversible their isotherms were analysed to produce thermodynamic data. The values were then compared with literature values obtained for similar zeolite exchanges. Structural data (PXRD, MASNMR) showed that cation exchange often caused changes in unit cell symmetry as well as the creation of immiscible phases rich in the end-members when calcium and strontium were the in-going cations.