Synthesis of methyl acrylate with Cs-Sb_2O_5/SiO_2 as catalyst

SiO2 was used as a carrier to support alkali metals Cs and Sb2O5 as active component to prepare Cs-Sb2O5/SiO2-type solid base catalyst,and the loading mass fraction was determined by means of SEM/EDS semi-quantitative analysis,of which average mass fraction of Sb and Cs is 10.06% ans 8.84%. With such catalyst,the process of one-step synthesizing methyl acrylate with catalytic methyl acetate was researched in the micro-reactor-chromatography apparatus,and the product formed was identified as methyl acrylate by GC-MS. The result shows that the optimized synthesis effect is achieved and the yield of methyl acrylate can reach 47.6% when the mole ratio of methyl acetate to formaldehyde is 3∶1,space velocity is 4-5 h-1 and the reaction temperature is 390 ℃.