Ionic liquids predominantly consist of ionic species[1]and have low melting points[2]usually less than 373 K.They were widely used in organic syn-thesis as green solvents or catalysts[3,4].Recently,Cooper et al[5]repo...Ionic liquids predominantly consist of ionic species[1]and have low melting points[2]usually less than 373 K.They were widely used in organic syn-thesis as green solvents or catalysts[3,4].Recently,Cooper et al[5]reported the preparation of an AEL type aluminophosphate molecular sieve using 1-ethyl-3-methylimidazolium bromide([emim]Br)ionic liq-uid as both the solvent and template.They named the novel attractive procedure ionothermal synthesis to distinguish it from the hydrothermal process.The AEL type aluminophosphate molecular sieve has no acidic sites because of its electrically neutral struc-ture[6].However,introducing Si species to substitute P in the framework will impart mild acidity to the AEL type molecular sieve and make it active for a va-riety of heterogeneous acidic catalytic reactions such as the hydroisomerization of alkane[7.8].In this work,Si species were introduced into the synthesis mixture and the silicoaluminophosphate molecular sieve with AEl structure was ionothermally synthe-sized.Meanwhile,the effect of Si species amount on the product properties was investigated.展开更多
文摘Ionic liquids predominantly consist of ionic species[1]and have low melting points[2]usually less than 373 K.They were widely used in organic syn-thesis as green solvents or catalysts[3,4].Recently,Cooper et al[5]reported the preparation of an AEL type aluminophosphate molecular sieve using 1-ethyl-3-methylimidazolium bromide([emim]Br)ionic liq-uid as both the solvent and template.They named the novel attractive procedure ionothermal synthesis to distinguish it from the hydrothermal process.The AEL type aluminophosphate molecular sieve has no acidic sites because of its electrically neutral struc-ture[6].However,introducing Si species to substitute P in the framework will impart mild acidity to the AEL type molecular sieve and make it active for a va-riety of heterogeneous acidic catalytic reactions such as the hydroisomerization of alkane[7.8].In this work,Si species were introduced into the synthesis mixture and the silicoaluminophosphate molecular sieve with AEl structure was ionothermally synthe-sized.Meanwhile,the effect of Si species amount on the product properties was investigated.
