Liquid phase trans-stilbene epoxidation over catalytically active cobalt substituted TUD-1 mesoporous materials (Co-TUD-1) using molecular oxygen

Quek, Xian-Yang; Tang, Qinghu; Hu, Shuangquan; Yang, Yanhui

doi:10.1016/j.apcata.2009.04.003

Cited by 46 publications

(16 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the conversion of styrene linearly increases with increasing reaction time and the Cu 2+ -doped amount (Fig. 12 A) [5,51,54] and the conversion trends are arranged in order of those reported in Fig. 11A.…”

Section: Effect Of Reaction Timementioning

confidence: 92%

“…12B). This may be suggested that the main product may be converted to secondary product due to the hydrolysis and opening of the oxirane ring [20,52,54].…”

Section: Effect Of Reaction Timementioning

confidence: 98%

“…These oxygenated products result probably from the consecutive oxidation of styrene oxide [11,24,36,53,54].…”

Section: Effect Of Oxidant/substrate Molar Ratiomentioning

confidence: 99%

See 2 more Smart Citations

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Thảo

Huyen

2015

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Effect Of Reaction Timementioning

confidence: 92%

“…12B). This may be suggested that the main product may be converted to secondary product due to the hydrolysis and opening of the oxirane ring [20,52,54].…”

Section: Effect Of Reaction Timementioning

confidence: 98%

See 1 more Smart Citation

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Thảo

Huyen

2015

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Cui et al introduced a certain amount of cobalt ions into SBA‐15 framework using a pH‐adjusting method or an adsorption method, and the afforded Co–SBA‐15 was highly active in epoxidation . In our previous work, Co 2 + introduced into NaX, MCM‐41 and TUD‐1 using an ion exchange method or a direct hydrothermal synthesis method showed high activity in epoxidation . Nonetheless, the catalysts reported up to now still cannot balance catalytic activity with epoxide selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Due to their superior catalytic performances in epoxidation, cobalt‐based catalysts have attracted significant attention in the past few years . A composite catalyst of Co–ZSM‐5 coordinated with organic ligands was reported to achieve 96.9% conversion and 94.0% selectivity for the epoxidation of styrene with air .…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II) acetylacetonate complex immobilized on aminosilane‐modified SBA‐15 as an efficient catalyst for epoxidation of trans‐stilbene with molecular oxygen

Tang

Wang

Zhang

et al. 2016

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

From environmental and economic points of view, it is highly desirable to develop a clean and efficient catalytic process to produce epoxides. An attractive approach is to use a solid, recyclable catalyst and molecular oxygen as the oxidant without any sacrificial reductant or other additives. Nonetheless, the catalysts reported up to now still cannot balance catalytic activity with epoxide selectivity. It is of great importance to explore novel catalysts with both high activity and selectivity for the epoxidation of olefins. In this work, cobalt(II) acetylacetonate (Co(acac)2) was covalently bonded to the silica surface of SBA‐15 molecular sieve by multi‐step grafting using 3‐aminopropytrimethoxysilane (APTS) as coupling agent. Characterizations with nitrogen physisorption, X‐ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis suggested that the metal complex was successfully immobilized on the aminosilane‐modified SBA‐15 surface and the channel structure remained intact. The synthesized Co(acac)2APTS@SBA‐15 catalyst was used in the epoxidation of trans‐stilbene (TS) with molecular oxygen. Compared to the sample prepared by the impregnation method as well as Co(acac)2 solutions under the same reaction conditions, the Co(acac)2 immobilized catalyst exhibited remarkably higher TS conversion and trans‐stilbene oxide (TSO) selectivity. An increase in TS conversion with Co content was observed when the Co loading was lower than 0.70% and the 0.70Co(acac)2APTS@SBA‐15 sample exhibited the best catalytic performance. Up to 50.1% of TS conversion could be achieved within 6 h, affording TSO selectivity as high as 96.7%. The superior catalytic performance of this particular catalyst is attributed to the high activity of the immobilized Co(acac)2 species on SBA‐15. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Selective Oxidations Catalyzed by Mesoporous Metal Silicates

Kholdeeva¹

2013

Liquid Phase Oxidation via Heterogeneous Catalysis

View full text Add to dashboard Cite

Liquid phase trans-stilbene epoxidation over catalytically active cobalt substituted TUD-1 mesoporous materials (Co-TUD-1) using molecular oxygen

Cited by 46 publications

References 42 publications

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Catalytic oxidation of styrene over Cu-doped hydrotalcites

Cobalt(II) acetylacetonate complex immobilized on aminosilane‐modified SBA‐15 as an efficient catalyst for epoxidation of trans‐stilbene with molecular oxygen

Selective Oxidations Catalyzed by Mesoporous Metal Silicates

Contact Info

Product

Resources

About