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Citation: Zhao Daqing, Qiu Shilun, Pang Wenqin, Jing Fengying, Wu Yijie, Xiao Yianwen. ON THE COORDINATION CONDITIONS OF AI IN MOLECULAR SIEVE SAPO-5[J]. Chinese Journal of Applied Chemistry, ;1992, 9(4): 61-63. shu

ON THE COORDINATION CONDITIONS OF AI IN MOLECULAR SIEVE SAPO-5

1.
1. Department of Chemistry, Jilin University, Changchun 130023;
2.
2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130023

Corresponding author: Zhao Daqing,
Received Date: 8 April 1991
Available Online: 20 August 1991
Fund Project:

The molecular sieves SAPO-5 have been synthesized by hydrothermal crystallization from Pr₃N-P₂O₅-Al₂O₃-SiO₂-H₂O-HF.Experiments of preparation conditions show that the key for the successful preparation of SAPO-5 lies in the formation of AlPO₄ gel.The ²⁷Al NMR results showed that in this case Al is four-coordinated.Tripropylamine was used as a template to stabilize tetrahedral Al and prevent it from attack of water.The EPMA analysis showed that an isomorphic substitution of P and A for Si occurs in SAPO-5 crystals.
- molecular sieve,
- SAPO-5,
- preparation
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