化工进展2011，Vol.30Issue(5)：1019-1023,5.
Cr2O3/SiO2催化苯酚与碳酸二乙酯邻位烷基化反应
Ortho-selective alkylation of phenol with diethyl carbonate over Cr2O3/SiO2 catalyst
摘要
Abstract
Cr2O3/SiO2 catalysts with different Cr2O3 loadings were prepared by impregnation with Cr(NO3)3·9H2O as precursor. Ortho-selective alkylation of phenol with diethyl carbonate was performed in a continuous flow fixed-bed reactor filled with Cr2O3/SiO2 catalysts. The Cr2O3/SiO2 catalysts were characterized by means of XRD, NH3-TPD, CO2-TPD and FT-IR with pyridine adsorption. The results indicated that with increasing Cr2O3 loading, conversion of phenol and selectivity to o-ethylphenol increased; when Cr2O3 loading reached 7.5％, conversion of phenol and selectivity for o-ethylphenol reached a maximum of 48％ and 67％, respectively. The catalyst characterization results showed that the Lewis acid sites were the active centers of ortho-selective alkylation of phenol: and the variations in phenol conversion and selectivity to o-ethylphenol could be mainly ascribed to the change in the number of acid sites and base sites.关键词
氧化铬/二氧化硅/碳酸二乙酯/苯酚/邻乙基苯酚/2,6-二乙基苯酚Key words
Cr2O3/SiO2/ diethylcarbonate/ phenol/ o-ethylphenol/ 2,6-diethylphenol分类
化学化工引用本文复制引用
贾泉,薛冰,许杰,李永昕..Cr2O3/SiO2催化苯酚与碳酸二乙酯邻位烷基化反应[J].化工进展,2011,30(5):1019-1023,5.基金项目
江苏省高技术研究项目(BG2006015)及江苏省"青蓝工程"青年骨干教师项目. （BG2006015）
