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Synthesis of Ethylene Glycol Monobutyl Ether with KF /Al2 O3 Solid Base Catalyst


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Synthesis of Ethylene Glycol Monobutyl Ether with KF /Al2 O3 Solid Base Catalyst
GUO Deng-feng1LIU Hong1LIU Zhun2CHAO Hui-qing2ZHAO Wen1SHI Zao-jun1
1. School of Chemistry and Chemical Engineering,Changzhou University,Changzhou 213164; 2. Jiangsu Yida Chemical Co. Ltd. ,Jiangyin 214441
solid base catalysts preparation ethylene glycol monobutyl ether characterization Synthesis
O623. 42
In order to solve the problems that the traditional catalysts are dealt in difficult and polluted environments in ethylene glycol monobutyl ether production,the KF/Al2O3 solid base catalysts are prepared via impregnation method and their catalytic properties for the etherification to synthesize ethylene glycol monobutyl ether from ethylene oxide( EO) and butanol are evaluated. The influences of loading amount of KF over Al203 support,calcinate temperature of catalysts are examined. The results indicate that the catalyst possesses the best catalytic activity under the conditions of catalyst calcinate temperature 600 ℃ and 30% of loading amount of KF. The catalysts are characterized by means of Xray diffraction( XRD) and surface alkalinity are determined by Hammett indicator method. The results show that its base strength is higher than 18. 4 and the base amount( pKa>9. 3) is 3. 0 mmol /g Cat. The optimal etherification condition is as follows: reaction temperature 110℃,pressure 0. 20 ~ 0. 30 MPa,reaction time 100 ~120 min,w( catalyst) = 0. 5% and n( BuOH) ∶n( EO) = 5 ∶1. Under such reaction conditions,the conversion of EO reaches 99. 47%.


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Last Update: 2012-02-28