Synthesis of titanium silicalite (TS-1) from the TPABr system and its catalytic properties for epoxidation of propylene

Titanium silicalite (TS-1) was successfully synthesized by using tetra-propylammonium bromide (TPABr) and n-butylamine as the template and the base, respectively. XRD, IR, SEM, 13 C CP/MAS NMR, UV–VIS, and UV-Raman techniques were used to characterize the synthesized products. The results show that...

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Bibliographic Details
Published in:Catalysis today 2002-05, Vol.74 (1), p.65-75
Main Authors: Wang, Xiang-sheng, Guo, Xin-wen, Li, Gang
Format: Article
Language:English
Subjects:
Acid–base effect
Aging test
Epoxidation of propylene
Solvent effect
TPABr
TS-1
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Summary:Titanium silicalite (TS-1) was successfully synthesized by using tetra-propylammonium bromide (TPABr) and n-butylamine as the template and the base, respectively. XRD, IR, SEM, 13 C CP/MAS NMR, UV–VIS, and UV-Raman techniques were used to characterize the synthesized products. The results show that TS-1 has MFI structure with high crystallinity and large crystal size, and with two kinds of titanium species. Using epoxidation of propylene as the probe, the catalytic properties of TS-1 in the present work were investigated. The crystal size of TS-1 affects much the initial reaction rate of propylene oxide (PO) formation. The effects of reaction conditions on PO reveal that the PO formation is greatly influenced by the solvent and the solution pH value. Methanol is the most preferable solvent, and a portion of water (
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(01)00531-4