石油炼制与化工 ›› 2019, Vol. 50 ›› Issue (6): 51-56.

• 催化剂 • 上一篇    下一篇

晶化母液介质中制备多级孔TS-1分子筛

田雨,张书贤,温贻强,王向宇   

  1.  郑州大学化学与分子工程学院 
  • 收稿日期:2018-09-17 修回日期:2019-01-09 出版日期:2019-06-12 发布日期:2019-07-01
  • 通讯作者: 王向宇 E-mail:wangxiangyu@zzu.edu.cn
  • 基金资助:
    河南省杰出人才创新基金;河南省重大科技专项

PREPARATION OF HIERARCHICAL TS-1 IN RECYCLED MOTHER LIQUID

    

  1.  
  • Received:2018-09-17 Revised:2019-01-09 Online:2019-06-12 Published:2019-07-01
  • Supported by:
     

摘要: 将微孔TS-1分子筛 晶化过程中产生的母液回收处理后用于多级孔TS-1分子筛制备,考察回收母液作为介质的体系中,模板剂/碱体系和碱浓度等因素对多级孔TS-1制备的影响。结果表明:所制备的多级孔TS-1分子筛在保留MFI结构的同时,产生了较多的介孔,使其在环己酮氨肟化反应中显示出更好的催化性能,在较低的催化剂浓度下(1.6 g/L),环己酮转化率为94%,环己酮肟选择性为99%;将回收晶化母液用于多级孔TS-1分子筛的制备,降低了纯水用量,减少了废液排放,符合绿色化学的发展要求。

关键词: 回收母液, 钛硅分子筛, 多级孔, 环己酮氨肟化

Abstract: The mother liquid of microporous TS-1 crystallization process was recycled and used as the medium for the preparation of hierarchical TS-1 zeolites. In the system of recycled mother liquid as medium, the effects of the template agent and alkali on the preparation of hierarchical TS-1 were investigated, respectively. The results showed that while retaining the MFI structure, the prepared hierarchical TS-1 formed more mesoporous pores and exhibited superior catalytic activity in the cyclohexanone ammoximation. At a lower catalyst concentration (1.6 g/L), the cyclohexanone conversion rate was 94% and the cyclohexanone-oxime selectivity was 99%. The recycled mother liquid reduced the consumption of water and the discharge of waste liquid, and agreed with the development requirements of green chemistry.

Key words: recycled mother liquid, TS-1 zeolite, hierarchical pores, cyclohexanone ammoximation

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