Epoxidation of allyl chloride and hydrogen peroxide over titanium silicalite-1 film on SiO2 pellet support

✍ Scribed by Li Wang; Ying Zhou; Zhentao Mi

• Publisher: Wiley (John Wiley & Sons)
• Year: 2007
• Tongue: English
• Weight: 251 KB
• Volume: 82
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1689

✦ Synopsis

Abstract

Titanium silicalite‐1 (TS‐1) films were prepared on SiO~2~ pellet supports via an in situ hydrothermal synthesis method and were characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), scanning electron microscopy (SEM) and ^29^Si magic angle spinning nuclear magnetic resonance (Si MAS NMR). The growth time of TS‐1 film had a strong effect on its morphology and the thickness and size of the crystals. The uniformity and thickness of TS‐1 films increased with increase of growth times. The epoxidation of allyl chloride (ACH) with dilute hydrogen peroxide to form epichlorohydrin (ECH) over the TS‐1 films was carried out in a fixed bed reactor. The conversion of ACH and the selectivity to ECH over the TS‐1 films of the second growth were higher than that of the first growth, the third and the fourth growth. And the conversion and selectivity as a function of time‐on‐stream gave a good stable performance in an extended test up to at least 19 h. The final steady‐state conversion and selectivity were approximately 86% and 55%, respectively. Copyright © 2007 Society of Chemical Industry