球形核壳结构磁性碳基固体酸的制备及应用

Preparation and application of magnetic carbon-based solid acid with spherical core-shell structure

依次经水热法合成磁性Fe3O4、葡萄糖水热碳化和对甲苯磺酸焙烧磺化,制得球形核壳结构磁性碳基固体酸催化剂Fe3O4@C-SO3H,采用FTIR、XRD、VSM和TEM对其进行表征并测定酸密度。该催化剂用于催化油酸和甲醇的酯化反应,可实现与反应体系的快速分离。Fe3O4@C-SO3H用量为油酸质量的1.59%,醇酸摩尔比6∶1,反应7 h,油酸的酯化率可达80.8%。

Prepared by magnetic Fe3O4 through hydrothermal method, glucose hydrothermal carbonization, p-toluenesulfonic acid roasting sulfonation respectively, magnetic carbon-based solid acid Fe3 04 @ C-SO3 H was obtained suc XRD,VSM,TEM cessfully. and acid It was characterized by density determination. It sizing methyl oleate from oleic acid and methyl molar ration of methyl alcohol to oleic acid 6：1 various physico-chemical techniques such as FTIR, could be separated from reaction system after synthealcohol. When 1.59% catalyst dose based on oleic acid, and reaction time 7 h,the esterification rate was 80. 8%.