A facile and effective method to synthesize TS‐1zeolite aggregates has been presented.The crystallization of silanized seeds and nanocrystallites led to large and irregular TS‐1zeolite aggregates ranging from5to40μ...A facile and effective method to synthesize TS‐1zeolite aggregates has been presented.The crystallization of silanized seeds and nanocrystallites led to large and irregular TS‐1zeolite aggregates ranging from5to40μm in size,based on the special sol‐gel chemistry of bridged organosilane.Epoxidation of1‐hexene and cyclohexene was used as a probe reaction to investigate the catalytic performance of the resulting materials.These TS‐1zeolite aggregates possessed both the conventional nanoparticle properties of TS‐1zeolites and variable surface hydrophilic/hydrophobic features,which enhanced the catalytic properties of hydroperoxides for alkene epoxidation.Moreover,the large aggregates effectively simplified the separation procedure during preparation and catalytic reactions.展开更多
The catalytic oxidation processes for cyclohexane/H_2O_2/acetone system overthe TS-1 zeolite was studied. Study results have revealed that the cyclohexane conversion was 27%after the reaction proceeded at 100℃ for 2 ...The catalytic oxidation processes for cyclohexane/H_2O_2/acetone system overthe TS-1 zeolite was studied. Study results have revealed that the cyclohexane conversion was 27%after the reaction proceeded at 100℃ for 2 hours at a cyclohexane/H_2O_2 molar ratio of 0.8. Thecyclohexanol/cyclohexanone molar ratio was 1.3 along with a certain amount of organic acids andesters, the formation of which was closely associated with the oxidation of reaction solvent anddeep oxidation of cyclohexanone and cyclohexanol contained in the reaction products. With respect tothe catalytic oxidation of cyclohexane/H_2O_2 system the selection of appropriate solvent wascritically important.展开更多
基金supported by the National Natural Science Foundation of China (21503081,21503073,21403070,21707093)the National Key Research and Development Program of China (2017YFA0403102)~~
文摘A facile and effective method to synthesize TS‐1zeolite aggregates has been presented.The crystallization of silanized seeds and nanocrystallites led to large and irregular TS‐1zeolite aggregates ranging from5to40μm in size,based on the special sol‐gel chemistry of bridged organosilane.Epoxidation of1‐hexene and cyclohexene was used as a probe reaction to investigate the catalytic performance of the resulting materials.These TS‐1zeolite aggregates possessed both the conventional nanoparticle properties of TS‐1zeolites and variable surface hydrophilic/hydrophobic features,which enhanced the catalytic properties of hydroperoxides for alkene epoxidation.Moreover,the large aggregates effectively simplified the separation procedure during preparation and catalytic reactions.
文摘The catalytic oxidation processes for cyclohexane/H_2O_2/acetone system overthe TS-1 zeolite was studied. Study results have revealed that the cyclohexane conversion was 27%after the reaction proceeded at 100℃ for 2 hours at a cyclohexane/H_2O_2 molar ratio of 0.8. Thecyclohexanol/cyclohexanone molar ratio was 1.3 along with a certain amount of organic acids andesters, the formation of which was closely associated with the oxidation of reaction solvent anddeep oxidation of cyclohexanone and cyclohexanol contained in the reaction products. With respect tothe catalytic oxidation of cyclohexane/H_2O_2 system the selection of appropriate solvent wascritically important.
