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

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.

發文機構：State Key Laboratory of Catalytic Materials and Reaction Engineering

關鍵詞：titaniumsilicaliteoxidativebrominationorganicsolventfreeH2O2/HBrpolybromineion

分類號： O62[理學—有機化學]