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Formation of Alkali‐Aluminosilicate Layers on Thermochemically Dealuminated Y Zeolites by Alkaline Leaching
Author(s) -
Lutz W.,
Heidemann D.,
Rüscher C.H.,
Buhl J.Chr.
Publication year - 2001
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/1521-4079(200101)36:1<9::aid-crat9>3.0.co;2-t
Subject(s) - aluminosilicate , alkali metal , leaching (pedology) , alkaline earth metal , chemistry , sodium aluminosilicate , zeolite , inorganic chemistry , mineralogy , organic chemistry , catalysis , geology , soil science , soil water
Zeolite Y was steamed at 873 K for 7 h. This thermochemical treatment increases the Si/Al ratio of the zeolite framework from 2.4 to 3.8 under the formation of non‐framework aluminium species. Successive leaching in 0.25 M KOH 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.