Influence of physicochemical and structural properties of alumino-silicate gel precursors on the kinetics of zeolite crystallization

Conference · Fri Dec 01 04:00:00 EST 1995

OSTI ID:126759

Subotic, B; Smit, I ^[1]; Crea, F ^[2]

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1. Rugjer Boskovic Institute, Zagreb (Costa Rica)
2. Universita della Calabria (Italy); and others

Having in mind the influence of cations on the all stages of zeolite synthesis, we undertook a study to cast more light on the influence of alkali cations (Li, Na, K) on the chemical and structural properties of the amorphous aluminosilicate gel precursors and consequence of these properties on zeolite crystallization. For this reason, the solid phases precipitated from the batches of the following molar composition: 4.41 Me{sub 2}O{sm_bullet}Al{sub 2}O{sub 3}{sm_bullet}3 SiO{sub 2}{sm_bullet}222.2 H{sub 2}O (Me = Li, Li+Na, Na, Na+K and K) were hydrothermally treated by 2M NaOH solution at 80{degrees}C. Kinetics of nucleation and crystal growth of zeolites A and X as well as the particulate properties of the crystalline end products were discussed in the terms of chemical and structural properties of the gels.

• OSTI ID: 126759
• Report Number(s): CONF-950402--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CATIONS
CRYSTAL GROWTH
CRYSTALLIZATION
GELS
LITHIUM
MORPHOLOGY
PARTICLE SIZE
POTASSIUM
PRECURSOR
SILICA
SODIUM
SYNTHESIS
ZEOLITES