| 影响水热合成VPI-5及Si-VPI-5的因素 |
| FACTORS AFFECTING THE HYDROTHERMAL SYNTHESIS OF VPI-5 AND Si-VPI-5 WITH EXTRA-LARGE PORES |
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| 摘要: 使用二正丙胺(DPA)和二正丁胺(DBA)作结构导向剂合成出VPI-5和Si-VPI-5,并以二异丙胺(DIPA)为结构导向剂成功地合成出高结晶度的超大孔磷酸铝分子筛VPI-5,其XRD谱图中未检测出其他杂质峰.VPI-5分子筛不同于一般中微孔磷酸铝分子筛,合成条件极其苛刻,为此对原料组成、成胶条件、陈化时间和温度、晶化时间和温度、结构导向剂种类、pH等合成条件对VPI-5分子筛结晶度的影响作了较为详尽的研究,结果表明有机胺在晶化过程中具有结构导向作用,但不起空间填充作用,加有机胺前的陈化过程是必要的. |
| 关键词: VPI-5 水热合成 Si-VPI-5 晶化 结构导向剂 |
| 基金项目: 国家自然科学基金 |
| Abstract: VPI-5 and Si-VPI-5 with extra-large pores have been synthesized using di-n-propylaminc(DPA) and di-n-butylamine(DBA) as structure directing agents, it is emphasized that we have synthesized VPI-5 withhigh crystallinity using di-n-iso-propylamine(DIPA).Differing from alminophosphate molecular sieves with middle or small pores, the demands are strict during synthesis of VPI-5. Thus, systematic studies on the factors affecting the hydrothermal synthesis of VPI-5 and Si-VPI-5 are reported. Our observation may suggest that the organic amines act as structure directing agents rather than as space fillers. Aging of the precursor aluminophosphate gel before and after the addition of organic amine is necessary. |
| Keywords: VPI-5 Si-VPI-5 hydrothermal synthesis crystallization structure direct agent |
| 投稿时间：1991-07-22 |
| 摘要点击次数: 1196 |
| 全文下载次数: 1289 |
| 王坚强,段人怡,严爱珍.影响水热合成VPI-5及Si-VPI-5的因素[J].无机化学学报,1993,9(1):41-47. |
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