通过碱溶液处理硅铝比为25的Hβ分子筛，得到多级孔Hβ分子筛。通过XRD、BET、FT-IR对催化剂进行表征。结果表明，碱处理并没有改变分子筛的晶体结构，且碱处理后的分子筛具有更大的介孔结构，提高了传质效果。以苯甲醚与乙酸酐酰化反应为探针，测试碱处理后Hβ分子筛的催化效果，0.2 mol/L NaOH溶液处理得到的催化剂酰化反应效果最好；以此催化剂对工艺条件进行优化，在反应时间为2 h、反应温度为120℃、催化剂质量为2 g、反应物摩尔比为1.5的条件下，催化效果最佳，此时，苯甲醚转化率为89.27%，选择性为97.2%。

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(1987-),男,硕士研究生,研究方向为现代催化剂研制与开发及清洁燃料生产,1328294755@qq.com