Investigation on Organic Solvent Free Toluene Oxidative Bromination Reaction Catalyzed by HTS Zeolite

• 作者: Peng Xinxin Xia Changjiu Lin Min Zhu Bin Luo Yibin Shu Xingtian
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2020,（4）
• 所属期刊栏目: Scientific Research
• 页码范围: 1-9
• 页数: 9页
• 语种: 英文

摘要

The toluene oxidative bromination reaction catalyzed by hollow titanium silicalite(HTS)zeolite in aqueous medium was investigated by employing H2O2 and HBr under mild conditions without the need for organic solvent.A high toluene conversion(90.7％)and high selectivity of mono-bromotoluene(99.0％)was achieved under the optimal reaction conditions.The UV-Raman spectroscopy was applied for the mechanism study and the result reveals that HTS is efficient for catalyzing the oxidation reaction of HBr with H2O2 to produce abundant active bromine species,which can further facilitate the toluene electrophilic bromination reaction.A two-step toluene bromination reaction mechanism involving the HTS catalyzed active bromine species"generation-conversion-utilization"process is proposed based on the UV-Raman spectroscopy analysis.