Synthesis of zeolite A from palygorskite via acid activation

Autor:	Liangdong Feng, Jinlong Jiang, Yunhua Qian, Xu Gu, Chuansong Duanmu, Yaxin Gu
Rok vydání:	2012
Předmět:	Inorganic chemistry Palygorskite Hydrothermal treatment Geology law.invention chemistry.chemical_compound Acid activation chemistry Geochemistry and Petrology law Sodalite medicine Particle size Amorphous silica Crystallization Zeolite medicine.drug
Zdroj:	Applied Clay Science. 55:108-113
ISSN:	0169-1317
DOI:	10.1016/j.clay.2011.10.014
Popis:	Zeolite A has been successfully synthesized from palygorskite (PAL) via acid activation followed by hydrothermal treatment. The parameters that affected the synthesis of zeolite A such as acid concentration, crystallization time, and SiO2/Al2O3 molar ratio were investigated. The key synthesis procedure was the conversion of PAL to amorphous silica by acid activation which was enhanced by increasing of the HCl concentration. Under the condition of a low HCl concentration (1 mol/L) or a short crystallization time (1 h), sodalite with a low calcium binding capacity (CBC) was synthesized. A high HCl concentration (3 mol/L) and a proper crystallization time (5 h) were necessary for the formation of zeolite A in a wide range of SiO2/Al2O3 molar ratios (1.53–3.05). Under above conditions, the particle size and CBC value of the synthetic zeolite A were 2 μm and 318 meq/100 g.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::89fb7a43aa9e3f02fe22c08fa79a941e https://doi.org/10.1016/j.clay.2011.10.014 Zobrazit plný text záznamu Full Text from ScienceDirect