CATION-EXCHANGE IN SYNTHETIC ZEOLITE-L - THE EXCHANGE OF HYDRONIUM AND AMMONIUM-IONS BY ALKALI-METAL AND ALKALINE-EARTH CATIONS

被引：18

作者：

DYER, A ^{[1
]}

AMINI, S ^{[1
]}

ENAMY, H ^{[1
]}

ELNAGGAR, HA ^{[1
]}

ANDERSON, MW ^{[1
]}

机构：

[1] UMIST,DEPT CHEM,MANCHESTER,ENGLAND

来源：

ZEOLITES | 1993年 / 13卷 / 04期

关键词：

SYNTHETIC ZEOLITE-L; ALKALI METAL; ALKALINE EARTH; ION EXCHANGE; HYDRONIUM; AMMONIUM ION EXCHANGE; HYSTERESIS;

D O I：

10.1016/0144-2449(93)90007-P

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Isotherms have been constructed for the replacement of H and NH4 from synthetic zeolite L by the alkali metals (Na, K, Rb, Cs) and the alkaline earths (Mg, Ca, Sr, Ba). Characterization was carried out by XRD, Al-27 MAS n.m.r., thermal analyses, and analyses of solid and liquid phases by a variety of experimental techniques. Some isotherms show a type of hysteresis not previously seen in ion-exchange systems. It has been demonstrated that this is an artifact of common ion-exchange experimental methodology that is especially noticeable in the L structure because of its unique open-channel framework and linked cancrinite and intercage sites.

引用

页码：281 / 290

页数：10

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