Abstract: Hierarchical porous Hβ molecular sieve is obtained through using a low concentration alkali solution to process the Hβ molecular sieve with a ratio of silicon to aluminum being 25:1.The obtained catalysts are characterized by X-ray diffraction,nitrogen adsorption-desorption and Fourier-transform infrared spectroscopy,showing that alkali treatment has not changed the crystal structure of molecular sieve but can cause the molecular sieve to have a larger mesoporous structure,which can improve the mass transfer effect.The acylation reaction between anisole and acetic anhydride is used as a probe to test the catalytic effect of hierarchical porous Hβ molecular sieve.It is found that the catalyst processed by 0.2 mol·L-1 NaOH solution has the best catalytic effect in acylation reaction.This optimal catalyst is used to optimize the acylation process conditions.The conversion and selectivity of anisole can reach 89.27% and 97.2%,respectively under the best conditions of 2 h for reaction time,120℃ for reaction temperature,2 g for catalyst dosage and 1.5:1 for molar ratio between reactants.
李国华, 李会鹏, 赵华, 李艳歌, 关圣楠. 多级孔Hβ分子筛催化苯甲醚与乙酸酐酰化反应的研究[J]. 现代化工, 2019, 39(2): 112-116.
LI Guo-hua, LI Hui-peng, ZHAO Hua, LI Yan-ge, GUAN Sheng-nan. Acylation between anisole and acetic anhydride catalyzed by hierarchical porous Hβ molecular sieve. Modern Chemical Industry, 2019, 39(2): 112-116.
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