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Citation: FENG Shubo, WANG Shanshan, SUN Yanan, ZHENG Erli. Epoxidation of Olefins in Bicarbonate-activated Hydrogen Peroxide System[J]. Chinese Journal of Applied Chemistry, ;2011, 28(7): 759-763. doi: 10.3724/SP.J.1095.2011.00480 shu

Epoxidation of Olefins in Bicarbonate-activated Hydrogen Peroxide System

1.
College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018

Corresponding author: FENG Shubo,
Received Date: 17 August 2010
Available Online: 28 November 2010

Epoxidations of styrene and unsaturated fatty acid methyl esters(FAMEs) were studied using bicarbonate-activated hydrogen peroxide(BAP) system.The effects of bicarbonate,surfactants,adding modes of feedstocks,reaction time,the amount of H₂O₂ and reaction temperature on H₂O₂ decomposition and olefin epoxidation were investigated,respectively.When the molar ratio of n(styrene):n(H₂O₂):n(NaHCO₃) is 1:10:0.25,the adding amount of cation surfactant cetyl trimethylammonium bromide(CTAB) is 1% mass fraction,the reaction temperature is less than 35℃,the reaction time is 6 h with slowly adding 30% H₂O₂ under stirring,the yield and selectivity of styrene oxide were up to 85% and 96%,respectively,and only a minor amount of benzaldehyde was formed.Cation surfactant CTAB,which carries active oxygen species HCO₄^-,can significantly promote the styrene conversion.However,the electrophilicity of active oxygen species HCO₄^- is not enough to epoxide unsaturated FAMEs molecules with straight chains or containing an electron-defect C=C bond.
- bicarbonate,
- H₂O₂ activation,
- olefin epoxidation,
- green process
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