Study on the Synthesis of Ethyl Acetate by S_2O_3~(2-)/Fe_2O_3-TiO_2-Nd_2O_3 Solid Superacid

Ethyl acetate has been synthesized from acetic acid and ethanol by using Solid superacid S_2O_3~(2-)/Fe_2O_3-TiO_2-Nd_2O_3 as catalyst.Some factors influencing the yield of esterification were investigated, including catalyst weight,molar ratio of mentyol to acetic acid,reaction time and the times of using repeatedly catalyst.The optimum conditions as follows:molar ratio of acetic acid to ethanol was 1:3,catalyst's weight was 1.2g(19.98wt %of acetic acid),reaction time was 1.5h,under which the yield of esterification was over 92%.This kind of catalyst that can be recovered and reused has got no corrosiveness to the equipment and is easy to be seperated from the product,therefore S_2O_3~(2-)/Fe_2O_3-TiO_2-Nd_2O_3 is an effective catalyst for esterification of acetic acid with ethanol as well as environmental protection green catalyst.