Formation of alkali-aluminosilicate layers on thermochemically dealuminated Y zeolites by alkaline leaching

Authors
Lutz, W Heidemann, D Ruscher, CH Buhl, JC
Citation
W. Lutz et al., Formation of alkali-aluminosilicate layers on thermochemically dealuminated Y zeolites by alkaline leaching, CRYST RES T, 36(1), 2001, pp. 9-14
Citations number
12
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CRYSTAL RESEARCH AND TECHNOLOGY
ISSN journal
02321300 → ACNP
Volume
36
Issue
1
Year of publication
2001
Pages
9 - 14
Database
ISI
SICI code
0232-1300(2001)36:1<9:FOALOT>2.0.ZU;2-2
Abstract
Zeolite Y was steamed at 873 K for 7 h. This thermochemical treatment incre ases the Si/Al ratio of the zeolite framework from 2.4 to 3.8 under the for mation of non-framework aluminium species. Successive leaching in 0.25 M KO H at 353 K for 24 h decreases the Si/Al ratio of the zeolite to 2.6 due to the formation of a X-ray amorphous potassium aluminosilicate surface layer.