Title: Synthesis of dibutylmaleate catalyzed by solid acid
Abstract: Solid acid catalyst Zr(SO4)2/SiO2 were prepared and applied to synthsize dibutylmaleate.Effects of mass fraction of Zr(SO4)2) in the catalyst,calcination temperature,and calcination time on the catalytic activity were investigated.The catalysts were characterized by FTIR,XRD and TG methods.Process for catalytic synthesis of dibutylmaleate were optimized by orthogonal experiment design.The results showed that solid acid catalyst Zr(SO4)2/SiO2 exhibited high catalytic activity for the synthesis of dibutylmaleate.The appropriate conditions of catalysts preparation were as follows:loading amount of Zr(SO4)2(based on total mass of catalyst)was 57%,calcination temperature of catalyst was 400 ℃,calcination time was 2 h.Under suitable esterification conditions: mole ratio of maleic anhydride to n-butanol was 1∶2.5,mass fraction of Zr(SO4)2/SiO2 in maleic anhydride was 6.0%,water-carrying agent toluene was 8 mL,reaction time was 2 h,the esterification rate was 98.5%.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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