Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (2): 17-19.

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SYNTHESIS AND CHARACTERIZATION OF SILICA ZEOLITES FROM NONALKALINE MEDIA

Zhao Daqing1, Zhang Jianguo1, Wu Yijie1, Pei Fengkui1, Qiu Shilun2, Pang Wenqin2   

  1. 1. Changchun Institute of Applied Chemistry, Chinese, Academy of Sciences, 130022 Changchun;
    2. Department of Chemistry, Jilin University, Changchun
  • Received:1992-01-29 Revised:1992-05-19 Published:1993-04-10 Online:1993-04-10

Abstract: Hydrothermal crystallization of silica zeolite from nonalkaline media containing F- anions has been investigated. The MFI type (ZSM-5) silica zeolites were obtained with tripropylamine,choline, 1,4-diazabicyclo[2,2,2]octane or piperazine as template. Silica Theta-1 and ZSM-39 were prepared using 1,6-diaminohexane and tetramethylamminum cation as template, respectively. Highly resolved 29Si MAS NMR spectra of silica zeolites from nonalkaline media reveal new feature of the materials, which are indicative of the very low defect content and very high crystallinity.

Key words: silica zeolite, synthesis, characterization