The acid–base co-operativity of Zr/Al/Mg composite oxides for the ethoxylation of ethyl acetate with ethylene oxide

Abstract

A series of Zr/Al/Mg composite oxide catalysts were prepared by the coprecipitation method. The catalytic performances of Zr/Al/Mg composite oxide catalysts in the synthesis of ethylene glycol ethyl ether acetate by the ethoxylation of ethyl acetate with ethylene oxide were investigated. The results indicated that the addition of zirconium to Al/Mg composite oxides led to the increase in the amount of basic sites and the decrease in the amount of acid sites simultaneously. The excellent catalytic performance of Zr/Al/Mg composite oxide catalysts for the ethoxylation of ethyl acetate could be attributed to the co-operativity of the acidic and basic sites on the catalysts.

Catalytic Performance of Li/Mg Composites for the Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate

“…In the synthesis of composite solid base catalysts, a considerable number of composites take shape because of the strong interaction of the components. Especially, the calcination of the composite solid base catalysts at high temperature induces dehydration and decomposition, forming composite oxides with a poorly crystallized structure, large specific surface area, and basic properties, which are attributed to the different O 2– –M n + acid–base pairs and O 2– anions. , Thus, they are potential for catalytic support and heterogeneous basic catalysts.…”