Citation:
Zhao Daqing, Zhang Jianguo, Wu Yijie, Pei Fengkui, Qiu Shilun, Pang Wenqin. SYNTHESIS AND CHARACTERIZATION OF SILICA ZEOLITES FROM NONALKALINE MEDIA[J]. Chinese Journal of Applied Chemistry,
;1993, 10(2): 17-19.
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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 Thetα-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.
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Keywords:
- silica zeolite,
- synthesis,
- characterization
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