Synthesis of Mesoporous Titanium Silicalite-1 with High Stability in Cyclohexanone Ammoximation

Mesoporous titanium silicalite-1 （TS-1）was hydrothermally synthesized with the addition of triethanolamine （TEA） in the conventional process, and used in the cyclohexanone ammoximation in a continuous slurry reactor. The as-prepared TS-1 was characterized with X-ray diffraction（XRD）, scanning electr...

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Published inTransactions of Tianjin University Vol. 22; no. 3; pp. 254 - 260
Main Author 王亚权 叶家鑫 王书海 林永杰 王守桂 刘伟
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University 01.06.2016
Subjects
Engineering
Humanities and Social Sciences
Mechanical Engineering
multidisciplinary
Science
UV-Vis
介孔
反应合成
氨肟化
环己酮
紫外拉曼光谱
钛硅分子筛TS-1
高稳定性
cyclohexanone ammoximation
TS-1
mesopore
stability
triethanolamine
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Summary:Mesoporous titanium silicalite-1 （TS-1）was hydrothermally synthesized with the addition of triethanolamine （TEA） in the conventional process, and used in the cyclohexanone ammoximation in a continuous slurry reactor. The as-prepared TS-1 was characterized with X-ray diffraction（XRD）, scanning electron microcopy（SEM）, N2 adsorption-desorption, Fourier transform infrared （FT-IR）spectroscopy, UV-Visible （UV-Vis） diffuse reflectance spectra and UV Raman spectroscopy. The results indicated that the addition of TEA resulted in the formation of mesopores and the slight increase of framework titanium in TS- 1. TS- 1 synthesized with the addition of TEA exhibited a higher stability in the cyclohexanone ammoximation than that without the addition of TEA, attributing to the increase of mesopore volumes and the slight increase of the framework titanium in TS- 1. However, when the addition of TEA was up to TEA/SiO2 ratio of 0.24, the crystallinity and framework titanium of TS-1 decreased markedly, and the average crystal sizes of TS-1 increased, with the catalyst stability becoming poor.
Bibliography:12-1248/T
TS-1; triethanolamine; cyclohexanone ammoximation; mesopore; stability
Mesoporous titanium silicalite-1 （TS-1）was hydrothermally synthesized with the addition of triethanolamine （TEA） in the conventional process, and used in the cyclohexanone ammoximation in a continuous slurry reactor. The as-prepared TS-1 was characterized with X-ray diffraction（XRD）, scanning electron microcopy（SEM）, N2 adsorption-desorption, Fourier transform infrared （FT-IR）spectroscopy, UV-Visible （UV-Vis） diffuse reflectance spectra and UV Raman spectroscopy. The results indicated that the addition of TEA resulted in the formation of mesopores and the slight increase of framework titanium in TS- 1. TS- 1 synthesized with the addition of TEA exhibited a higher stability in the cyclohexanone ammoximation than that without the addition of TEA, attributing to the increase of mesopore volumes and the slight increase of the framework titanium in TS- 1. However, when the addition of TEA was up to TEA/SiO2 ratio of 0.24, the crystallinity and framework titanium of TS-1 decreased markedly, and the average crystal sizes of TS-1 increased, with the catalyst stability becoming poor.
ISSN:1006-4982
1995-8196
DOI:10.1007/s12209-016-2774-z