高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (4): 782.doi: 10.7503/cjcu20120689

• 研究论文: 无机化学 • 上一篇    下一篇

预先负载原料法的制备过程对复合分子筛形成的影响

张强, 徐少军, 孟晓静, 杨文慧, 李春义, 山红红, 杨朝合   

  1. 中国石油大学(华东)重质油国家重点实验室, 青岛 266580
  • 收稿日期:2012-07-20 出版日期:2013-04-10 发布日期:2013-03-20
  • 通讯作者: 李春义,男,博士,教授,主要从事多相催化方面的研究.E-mail:chyli@upc.edu.cn E-mail:chyli@upc.edu.cn
  • 基金资助:

    国家"九七三"计划项目(批准号:内2012CB215000)、中央高校基本科研业务费专项资金(批准号:12CX04038A)和中国石油大学研究生创新基金项目(批准号:CX-1211)资助.

Effect of Preparation Process on the Synthesis of Composite Molecular Sieves by Pre-loading Raw Method

ZHANG Qiang, XU Shao-Jun, MENG Xiao-Jing, YANG Wen-Hui, LI Chun-Yi, SHAN Hong-Hong, YANG Chao-He   

  1. State Key Laboratory of Heavy oil, China University of Petroleum, Qingdao 266580, China
  • Received:2012-07-20 Online:2013-04-10 Published:2013-03-20

摘要:

采用预先负载原料法合成了具有核/壳结构的复合分子筛, 并研究了铝源类型和制备过程对反应的影响. 结果表明, 以异丙醇铝为铝源时, 晶化时间较短, 产物中没有SAPO-5晶体, 延长晶化时间可以提高SAPO-5的结晶度. 将负载磷的ZSM-5分别与不同组成的凝胶混合, 经室温陈化后可以明显加快晶化速度. 制备过程中凝胶的水含量和搅拌方式也根据铝源类型的不同有所差别. 当以拟薄水铝石为原料时, 在相同的处理条件下, 产物的结晶度都较高.

关键词: 核/壳结构分子筛, ZSM-5, SAPO-5, 负载原料法

Abstract:

The core/shell binary structure composite molecular sieves have been synthesized by loading raw materials method. The effects of types of aluminium source and preparation process were investigated. The synthesized samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy dispersive spectrometry(EDS). Using iso-propanol aluminum as the aluminium source, there is no SAPO-5 phase in short crystallization time; prolonging crystallization time increases the crystallinity of SAPO-5; the aging of the different reaction mixture at room temperature can cause a rapid formation of SAPO-5 sieve. The choice of the content of water in gel and mixing manners are dictated by types of aluminium source. Using pseudoboehmite as aluminium source, at the same pretreated temperature of coating phosphorus and preparation process, the sieve with higher degree of crystallinity was obtained.

Key words: Core/shell binary structure composite molecular sieve, ZSM-5, SAPO-5, Loading raw material method

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