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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (6): 1122-1124. 上一篇    下一篇

研究论文

SAPO-11分子筛改进合成及正十二烷加氢异构化性能

王利军;黄茜丹;赵伟;李全芝   

  1. 复旦大学化学系.上海(200433)
  • 发布日期:2002-06-15

Improved Synthesis of SAPO-11 and Their n-Dodecane Hydroisomerization Properties

Wang LiJun;Huang Xidan;Zhao Wei;Li Quanzhi   

  1. Department of Chemistry, Fudan University.Shanghai(200433)
  • Published:2002-06-15

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被引次数

60 | 11

用二乙胺作模板剂，在较短晶化时间的水热条件下合成出不同Si/Al比的SAPO- 11样品。Si/Al比升高，结晶度下降，晶粒变小。~(29)Si NMR谱表明Si/Al比为0. 33的SAPO-11的SAPO区与Si区的交界区明显扩大，与之对应的NH_3-TPD也表明有较 高的中强酸/弱酸比例。样品担载Pd后对正十二烷的加氢异构化反应表明，交界区 扩大的Si/Al = 0.33的样品有最高的加氢异构化得率和选择性。

关键词: 二乙胺, 模板剂, 十二碳化合物, 加氢, 异构化, 选择性

Different Si/Al SAPO-11 were synthesied in short crystallizing time under hydrothermal condition with diethylamine as template. XRD spectra show that crystallinity and SAPO-11 size decrease with increasing Si/Al ratio. ~(29)Si NMR spectra indicate that SAPO-11 sample with an Si/Al of 0.33 significantly enhances the neighboring region between SAPO region and Si region, and NH_3-TPD results also show it has higher strong acid/weak acid ratio. Impregnated by Pd, the Si/Al 0.33 sample with enhanced neighboring region has the highest n- dodecane hydroisomerization conversion and selectivity.

Key words: DIETHYLAMINE, TEMPLATE AGENT, C12 COMPOUNDS, HYDROGENATION, ISOMERIZATION, SELECTIVITY

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