中华医学超声杂志

应用化学 ›› 1992, Vol. 0 ›› Issue (4): 61-63.

• 研究简报 • 上一篇    下一篇

铝对SAPO-5分子筛的影响

赵大庆1, 裘式纶1, 庞文琴1, 景凤英2, 吴亦洁2, 孝延文2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 中国科学院长春应用化学研究所, 长春
  • 收稿日期:1991-04-08 修回日期:1991-08-20 出版日期:1992-08-10 发布日期:1992-08-10
  • 基金资助:
    国家自然科学基金

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

Zhao Daqing1, Qiu Shilun1, Pang Wenqin1, Jing Fengying2, Wu Yijie2, Xiao Yianwen2   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023;
    2. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun
  • Received:1991-04-08 Revised:1991-08-20 Published:1992-08-10 Online:1992-08-10

PDF

338

摘要： SAPO-5分子筛是一种具有良好骨架结构和热稳定性的微孔晶体[1,2]。在催化等方面有很好的应用前景[3]。其合成所采用的铝源一般为水铝石,其它铝源活性较差[4]。我们在HF存在下,以H3PO4、水铝石和硅溶胶为原料,三丙胺为模板剂合成出SAPO-5分子筛,并得到了大单晶。研究了反应混合物中Al的配位环境对SAPO-5形成的影响。

关键词: 分子筛SAPO-5, 27Al NMR, 水热晶化

Abstract: 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.

Key words: molecular sieve, SAPO-5, preparation, hydrothermal crystallization, 27Al NMR, EPMA

网站版权 © 应用化学     本网站备案：吉ICP备12000082号