Synthesis of Zeolite 4A from Kaolin and Bauxite by Alkaline Fusion at Low Temperature

摘要：

Zeolite 4A was synthesized by fusion method using kaolin and bauxite as raw materials. It comprised alkaline fusion followed by hydrothermal treatment with step-change of synthesis temperature. The synthesized zeolite 4A samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and their calcium ion exchange capacity were tested by ethylene diamine tetraacetic acid (EDTA) volumetric method. The influence on the quality of zeolite 4A was investigated under different fusion temperature, fusion time, and mole ratio of SiO2/Al2O3, Na2O/SiO2 and H2O/Na2O. The optimum reaction parameters were determined. The results showed that the reasonable fusion temperature and time should be 600℃ and 2 h, and the reasonable ratios of raw materials were the SiO2/Al2O3 ratios from 1.8 to 2.2, the Na2O/SiO2 ratios from 2.0 to 2.3, and the H2O/Na2O ratio at 60, respectively.

关键词： Zeolite 4A Kaolin and Bauxite Alkaline fusion Hydrothermal synthesis

作者: Yuelin ZHU Zenghua CHANG Juan PANG Changjian XIONG

作者单位: Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School ofMaterials Sc Center of Materials Physics and Chemistry, Beihang University, Beijing 100191,China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 298-306

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）