Synthesis Of Pyridyl Tonic Liquids And The Research Of Catalytieal Function When It Was Supported On Porous Material

Ionic liquids(ILs)have unique properties: nonvolatile, nonflammable; good solvents fora wide range of organic, inorganic materials and polymer; high thermal stability and chemicalstability, wide range of liquids temperatures(-90℃~300℃);good ionic conductivity and largeelectrochemical window.As a new type of green environment-friendly solvent, ionic liquids(ILs)have attached much interest of the researchers. Not only the porosint have outstandingcontrollable porous structure characterization,but also it have kept definite metal and alloycharacterization.Such as high-temperrature,proof low temperature,withstand voltage,resistmedium erode,heat-poof epicentre map,heatconducting,conduction,weldable adjoin,Processable and so on.They are widely used in different chemical processes such as heterogeneous catalysis,organic synthesis, electrochemistry and analytical chemistry.The loss of ionic liquids can bereduced by being confined to solid supports in the using process．In the concentrated sulfuricacid conditions．The catalytic function of the ionic liquid with H+was also studied in theetherification reaction．The application area of ionic liquid could be extensively expanded asit is functionalized．The immobilization of the task specified ionic liquids could combine theadvantages of ionic liquids and solid supported materials．When the supported ionic liquidwas applied as catalyst or media in the reaction，it is more economical and convenient in theseparation of product and recycling of catalyst．In the thesis, HPYSO4ionic liquids have been prepared by the method of two steps. theionic liquids were fixed on silica gel，theHPYHSO4/silica gel have been prepared.HPYHSO4/silica gel was used as catalyst in esterification reaction,the rate of esterificationwas89%. After the catalyst was used5times, it still had catalytic activity.