Comparative study of hydrothermal synthesis routes of zeolite A

Zeolite A was successfully synthesized via convenient hydrothermal process using potassium-extracted residue of potassium feldspar as a combined source for silica and alumina. Optimization studies on the molar ratios of Na2O/SiO2 and H2O/SiO2, and aging time have been conducted. The results were that pure zeolite A with high crystallinity could be synthesized when the reaction mixture with molar ratios of Na2O/SiO2 and H2O/SiO2 of 2.0 and of 85, respectively, were crystallized at 100°C for 3h. Aging was found to be not prerequisite for the formation of zeolite A in the system. The product was characterized by XRD, FTIR, SEM and calcium exchange capacity. Finally, a comparative study of the zeolite A formation from the potassium-extracted residue and other industrial waste or natural silicate minerals was also carried out.

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Production of Porous Materials by Dealumination of Alumina-Rich Zeolites

MRS Proceedings ◽

10.1557/proc-371-123 ◽

1994 ◽

Vol 371 ◽

Cited By ~ 5

Author(s):

R. Le Van Mao ◽

G. Denes ◽

N.T.C. Vo ◽

J.A. Lavigne ◽

S.T. Le

Keyword(s):

Comparative Study ◽

Pore Size Distribution ◽

Mesoporous Materials ◽

Acid Leaching ◽

Textural Properties ◽

Zeolite A ◽

New Materials ◽

Ammonium Hexafluorosilicate ◽

Void Volumes ◽

Exchange Properties

AbstractA comparative study of chemical and textural properties for materials obtained by three different methods of dealumination of alumina-rich parent Ca-A zeolite showed that the method using ammonium hexafluorosilicate (AFS) resulted in the most interesting developments of mesoporous materials, with much higher void volumes and cation exchange properties than obtained by acid leaching or hydrothermal treatment. AFS treatment on both the Na and Ca forms of zeolite A resulted in materials with 12 nm sized mesopores, whereas smaller mesopores of about 4 nm were obtained when using the higher Si/Al ratio parent zeolite Na-X. Pore size distribution profiles obtained for these new materials are fairly narrow, indicating homogeneous mesopore sized solids.

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The Route of Hydrothermal Synthesis Zeolite-A from the Low-Grade Perak kaolin, Malaysia

Silicon ◽

10.1007/s12633-021-01620-4 ◽

2022 ◽

Author(s):

Norsuhailizah Sazali ◽

Zawati Harun ◽

Tijjani Abdullahi ◽

Noor Hasliza Kamarudin ◽

Norazlianie Sazali ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Low Grade ◽

Zeolite A

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Comparative Study on Synthesis of Gd2O3:Eu Phosphors by Various Synthesis Routes

Luminescent Materials in Display and Biomedical Applications ◽

10.1201/9780429025334-10 ◽

2020 ◽

pp. 186-199

Author(s):

Ruby Priya ◽

O.P. Pandey ◽

Vikas Dubey

Keyword(s):

Comparative Study ◽

Synthesis Routes

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Hydrothermal Synthesis of Zeolite A Using Blast Furnace Slag

ISIJ International ◽

10.2355/isijinternational.45.937 ◽

2005 ◽

Vol 45 (6) ◽

pp. 937-945 ◽

Cited By ~ 38

Author(s):

Yoshiyuki SUGANO ◽

Ryouji SAHARA ◽

Taichi MURAKAMI ◽

Takayuki NARUSHIMA ◽

Yasutaka IGUCHI ◽

...

Keyword(s):

Blast Furnace ◽

Hydrothermal Synthesis ◽

Blast Furnace Slag ◽

Zeolite A ◽

Furnace Slag

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Facile activation of lithium slag for the hydrothermal synthesis of zeolite A with commercial quality and high removal efficiency for the isotope of radioactive 90Sr

Inorganic Chemistry Frontiers ◽

10.1039/d1qi01492g ◽

2022 ◽

Author(s):

Binyu Wang ◽

Jing Li ◽

Xue Zhou ◽

Wenfeng Hao ◽

Shaoqing Zhang ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Solid Waste ◽

Removal Efficiency ◽

Value Added ◽

Zeolite A ◽

Lithium Slag ◽

Value Added Products

With the quick development of lithium industry, a large amount of solid waste of lithium slag are produced. Making high value-added products from lithium slag can not only alleviate the...

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