期刊
NEW JOURNAL OF CHEMISTRY
卷 38, 期 9, 页码 4229-4234出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nj00455h
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资金
- Talent Training Unite Fund of NSFC-Henan [U1204203]
- Innovation Fund for Elitists of Henan Province, China [0221001200]
- China Postdoctoral Science Foundation [2013T60705]
The active species distribution of zeolites significantly influences the catalytic performance. In this paper, titanium silicalite-1 (TS-1) was synthesized from silica sol, TiCl3 and NH3 with tetrapropyl ammonium bromide (TPAB) as the template agent. Modification with ethanolamine altered the distribution of Ti species in TS-1 particles. Some large voids as 50 x 70 nm and 70 x 110 nm existed in the inner part of modified TS-1 crystals and were responsible for improved diffusion properties and accessibility to active sites. The modified TS-1 was examined in continuous cyclohexanone ammoximation. A high conversion of cyclohexanone (98%) and oxime selectivity (100%) was stilt maintained after the test reaction had been carried out up to 410 h. The modified TS-1 is able to serve as a stable catalyst for continuous cyclohexanone ammoximation.
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