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Citation: DING Junhong, GONG Shuwen, LIU Lijun, LI Kaozhen, CUI Qingxin. Oxidative Bromination Reaction of Phenol Catalyzed by Ammonium Tungstophosphate Catalyst Supported on Silica[J]. Chinese Journal of Applied Chemistry, ;2012, 29(2): 135-139. doi: 10.3724/SP.J.1095.2012.00094 shu

Oxidative Bromination Reaction of Phenol Catalyzed by Ammonium Tungstophosphate Catalyst Supported on Silica

1.
Department of Chemistry, Liaocheng University, Liaocheng 252059, China

Corresponding author: GONG Shuwen,
Received Date: 11 March 2011
Available Online: 13 May 2011
Fund Project: 山东省优秀中青年科学家科研奖励基金(BS2010CL011) (BS2010CL011)山东省教育厅科研基金(J09LB58)资助项目 (J09LB58)

An efficient oxidative bromination reaction of phenol by KBr-H₂O₂ has been achieved in the presence of ammonium tungstophosphate catalyst supported on silica with different loadings,which were synthesized by sol-gel method.The effects of the reaction time and catalyst amount on the oxidative bromination reaction were also investigated.The results indicated that the Keggin structure of ammonium tungstophosphate could be retained after supported on silica,and these catalysts exhibited high bromination reaction catalytic activity with a yield of 96.4% and high selectivity of p-bromophenol with a p/o ratio of 3.2.After reaction,these catalysts can be recycled and still exhibited catalytic activity with a yield of 87.4% and a p/o ratio of 1.6 after four cycle reactions.
- ammonium tungstophosphate,
- catalysis,
- phenol,
- bromination
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