Direct synthesis of zeolite Y with large particle size

• Published in: The international journal of inorganic materials Vol. 3; no. 7; pp. 773 - 780
• Main Authors: Ferchiche, Samia, Warzywoda, Juliusz, Sacco, Albert
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2001
• Subjects: A. inorganic materials; A. microporous materials; A. zeolites; B. chemical synthesis; B. crystal growth; B. hydrothermal synthesis; B. hydrothermal synthesis; A. microporous materials; A. inorganic materials; B. chemical synthesis; B. crystal growth; A. zeolites
• ISSN: 1466-6049; 1466-6049
• DOI: 10.1016/S1466-6049(01)00046-0

Large zeolite Y particles have been synthesized directly from gels (4.76Na2O: 1.0Al2O3: xSiO2: 454H2O: 5TEA, x=5.25–8.75) aged at ∼293 K before static heating at 368 K. Product purity, size, and Si/Al ratio of zeolite Y depended on the gel composition and aging time. Two-day aging of gels (x=5.25 and 7.0) resulted in nearly pure zeolite Y (<5–10 wt.% zeolite Pt) with Si/Al=1.7 and 1.9, and maximum size of 95 and 120 μm, respectively. Sieving of products grown from gels with x=8.75 aged for 7 days resulted in nearly pure zeolite Y in the ∼50–125 μm particle size range. The Si/Al ratio of all zeolite Y grown from gels with x=8.75 did not change with aging time (2–20 days) and was 2.1.