ZEOLITE MCM-22 - SYNTHESIS, DEALUMINATION AND STRUCTURAL CHARACTERIZATION

被引：0

作者：

UNVERRICHT, S ^{[1
]}

HUNGER, M ^{[1
]}

ERNST, S ^{[1
]}

KARGE, HG ^{[1
]}

WEITKAMP, J ^{[1
]}

机构：

[1] MAX PLANCK SOC,FRITZ HABER INST,D-14195 BERLIN,GERMANY

来源：

ZEOLITES AND RELATED MICROPOROUS MATERIALS: STATE OF THE ART 1994 | 1994年 / 84卷

关键词：

D O I：

暂无

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：

Zeolite MCM-22 was synthesized and characterized by selected physico-chemical methods. MAS NMR spectroscopic studies reveal that at least five crystallographically non-equivalent T-sites exist in the structure of MCM-22 and that they are affected to different degrees by dealumination with SiCl4 vapors. From IR and TPDA experiments it can be concluded that the acidic properties of HMCM-22 are very similar to HZSM-5. A Spaciousness Index of ca. 8 is indicative of an effective pore width in the intermediate region between 10- and 12-membered ring zeolites.

引用

页码：37 / 44

页数：8

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