Synthesis and characterization of zeolite 4A from soft kaolin

被引：4

作者：

Li, Weiwei ^{[1
]}

Yan, Chunjie ^{[2
]}

Hu, Wenbin ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

[2] China Univ Geosci, Wuhan 430074, Peoples R China

来源：

DESALINATION AND WATER TREATMENT | 2010年 / 22卷 / 1-3期

关键词：

Zeolite; 4A; Soft kaolin; Hydrothermal synthesis of zeolites; XRD; IR; Metakaolin;

D O I：

10.5004/dwt.2010.1596

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The synthesis of zeolite 4A from soft kaolin has been studied. Kaolin was converted to meta-kaolin by firing at 550 degrees C for 2 h, which was then added to NaOH solutions of appropriate concentration. The optimum molar ratios for the main constituents in the starting gel were SiO(2)/Al(2)O(3) = 1.7, Na(2)O/SiO(2) = 2.8 and H(2)O/Na(2)O = 61.7. The gels were vigorously stirred at 70 degrees C for 2 h and aged under the room temperature for 24 h, then stirred again with intermediate speed at 90 degrees C. After 4 h, the product was centrifugated and washed till pH 10 similar to 11. Examination with XRD, IR and SEM proved that the product was zeolite 4A.

引用

页码：87 / 90

页数：4

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