Details
| Original language | English |
|---|---|
| Pages (from-to) | 1460-1467 |
| Number of pages | 8 |
| Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
| Volume | 626 |
| Issue number | 6 |
| Publication status | Published - 2000 |
Abstract
The steaming of zeolite Y (here at 873 K for 7 hours) leads to the formation of an amorphous aluminium aluminosilicate in addition to the dealuminated zeolite (DAY). An alkaline treatment of DAY causes the transformation of the non-framework phase into an alkali aluminosilicate and the partial desilication of the DAY framework. The alkali aluminosilicate is decomposed by a moderate acid leaching under the formation of silica gel. The 29Si MAS NMR and IR spectra of DAY and its chemically treated modifications are superimposed by the signals of the crystalline zeolite framework and the amorphous non-framework materials whereas XRD measurements only characterize the current state of the framework.
Keywords
- Alumosilicates, NMR (Si MAS), Phase transformations, Zeolites
ASJC Scopus subject areas
- Chemistry(all)
- Inorganic Chemistry
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In: Zeitschrift fur Anorganische und Allgemeine Chemie, Vol. 626, No. 6, 2000, p. 1460-1467.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase transformations in alkaline and acid leached Y zeolites dealuminated by steaming
AU - Lutz, W.
AU - Wieker, W.
AU - Müller, D.
AU - Schneider, M.
AU - Rüscher, C. H.
AU - Buhl, J. Ch
PY - 2000
Y1 - 2000
N2 - The steaming of zeolite Y (here at 873 K for 7 hours) leads to the formation of an amorphous aluminium aluminosilicate in addition to the dealuminated zeolite (DAY). An alkaline treatment of DAY causes the transformation of the non-framework phase into an alkali aluminosilicate and the partial desilication of the DAY framework. The alkali aluminosilicate is decomposed by a moderate acid leaching under the formation of silica gel. The 29Si MAS NMR and IR spectra of DAY and its chemically treated modifications are superimposed by the signals of the crystalline zeolite framework and the amorphous non-framework materials whereas XRD measurements only characterize the current state of the framework.
AB - The steaming of zeolite Y (here at 873 K for 7 hours) leads to the formation of an amorphous aluminium aluminosilicate in addition to the dealuminated zeolite (DAY). An alkaline treatment of DAY causes the transformation of the non-framework phase into an alkali aluminosilicate and the partial desilication of the DAY framework. The alkali aluminosilicate is decomposed by a moderate acid leaching under the formation of silica gel. The 29Si MAS NMR and IR spectra of DAY and its chemically treated modifications are superimposed by the signals of the crystalline zeolite framework and the amorphous non-framework materials whereas XRD measurements only characterize the current state of the framework.
KW - Alumosilicates
KW - NMR (Si MAS)
KW - Phase transformations
KW - Zeolites
UR - http://www.scopus.com/inward/record.url?scp=0034384893&partnerID=8YFLogxK
U2 - 10.1002/(sici)1521-3749(200006)626:6<1460::aid-zaac1460>3.0.co;2-x
DO - 10.1002/(sici)1521-3749(200006)626:6<1460::aid-zaac1460>3.0.co;2-x
M3 - Article
AN - SCOPUS:0034384893
VL - 626
SP - 1460
EP - 1467
JO - Zeitschrift fur Anorganische und Allgemeine Chemie
JF - Zeitschrift fur Anorganische und Allgemeine Chemie
SN - 0044-2313
IS - 6
ER -