Modification of Zeolite L in Situ-synthesis Oil kaolin Microspheres
[1]CHEN Yiliang,LIU Lin,ZHANG Zhongdong,et al.Modification of Zeolite L in Situ-synthesis Oil kaolin Microspheres[J].Journal of Zhengzhou University (Engineering Science),2009,30(02):14-18.
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
30卷
Number of periods:
2009年02期
Page number:
14-18
Column:
Public date:
1900-01-01
- Title:
- Modification of Zeolite L in Situ-synthesis Oil kaolin Microspheres
- Keywords:
- kaolin microspheres; L zeolite; ion exchange; roasting; Citric acid treatment
- CLC:
- -
- DOI:
- -
- Abstract:
- The L zeolite synthesized on kaolin microspheres was modified to reduce its potassium oxide content and improve its silicon-aluminum ratio. The amount, temperature and time of ammonium sulfate during ion exchange were optimized, the effects of roasting on silicon-aluminum ratio and crystallinity were investigated, and ion exchange, citric acid treatment and water vapor roasting were combined to improve the silicon-aluminum ratio of zeolite. The results showed that the optimal reaction conditions during ion exchange were zeolite:water:ammonium sulfate ratio of 1g:10mL:1g, reaction temperature 80 °C, reaction time 2h. Ion exchange, citric acid treatment combined with hydrothermal roasting can significantly improve the silicon-aluminum ratio of zeolite while maintaining the integrity of the crystal structure, and when the citric acid concentration is 0.10 mol/L, the crystallinity of the three-cross lemon three-baked (E) sample is 82%, and the silicon-aluminum ratio reaches 13.60.
- References:
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Last Update:
1900-01-01