Guo D.-F.,Changzhou University |
Liu H.,Changzhou University |
Liu Z.,Jiangsu Yida Chemical Co. |
Chao H.-Q.,Jiangsu Yida Chemical Co. |
And 2 more authors.
Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology | Year: 2011
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°C and 30% of loading amount of KF. The catalysts are characterized by means of X-ray 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°C, 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%.