Abstract
The contribution introduced a new type of titanosilicate molecular sieve HTS-1-X with high specific surface area, high titanium content, hierarchical pores, hydrophobicity, and reusable by one-step dry gel conversion method using phenolic resin as a hydrophobic reagent. The HTS-1-X catalysts showed good catalytic ability in the propylene epoxidation reaction, and the high specific surface area greatly increased the conversion rate of hydrogen peroxide (H2O2). By controlling the content of phenolic resin, the selectivity of propylene oxide (PO) could reach the optimal value. After five cycles of reusability, the selectivity of PO was still maintained at a high position (88.94%). Through Raman, 13C-MAS-NMR and other characterization methods, the possible preparation mechanism of phenolic resin hydrophobic modification of titanium silicalite-1 was proposed. This research put forwarded a simple and novel operation method to make high-performance and hydrophobic hierarchical porous molecular sieve, making it a highly efficient catalyst that would be widely used in the oxidation of macromolecular olefins.
Graphic Abstract
The simple and efficient dry gel conversion method was chosen to prepare titanium silicalite-1 (TS-1) instead of the traditional hydrothermal synthesis method. The hydrophobic carbon source (phenolic resin) was added in the one-step synthesis process, and the hydrophobic hierarchical porous HTS-1-X was successfully synthesized.
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The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China (Grant No. 21606168).
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Wang, B., Zhu, Y., Han, H. et al. Preparation and Catalytic Performance in Propylene Epoxidation of Hydrophobic Hierarchical Porous TS-1 Zeolite. Catal Lett 152, 3076–3088 (2022). https://doi.org/10.1007/s10562-021-03805-3
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DOI: https://doi.org/10.1007/s10562-021-03805-3