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Citation: Qin Ying, Yue Yinghong, Gao Zi. On the Hydrophobicity of Mordenite[J]. Chinese Journal of Applied Chemistry, ;1997, 14(3): 9-11. shu

On the Hydrophobicity of Mordenite

1.
Department of Chemistry, Fudan University, Shanghai 200433

Received Date: 21 August 1996
Available Online: 8 April 1997

Dealuminated mordenites with Si/Al ratio of 15~112 have been prepared. The amount of dealumination defects in the zeolites was measured by IR method. Experimental results on the thermal stability and hydrophobicity of the zeolites showed that the majority of the terminal silanol groups formed during dealumination still remains as hydrophilic center. Additional treatment with steam or (NH₄)₂SiF₆ solution,which transforms the hydrophilic surface silanol groups into hydrophobic-Si-O-Si-bonds, markedly increases the hydrophobicity of the dealuminated zeolite.
- mordenite,
- dealumination,
- thermal stability,
- hydrophobicity
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