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第 36 卷第 6 期 精 细 化 工 Vol.36, No.6
201 9 年 6 月 FINE CHEMICALS June 2019
催化与分离提纯技术
Fe-多级孔 Hβ 的制备及催化合成二苯甲烷性能
*
苏 炜,陈政利,韩 娜,沈 健,王 雷 ,刘 姝,杨丽娜
(辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001)
摘要:用 NaOH 溶液对 Hβ 进行处理,得到多级孔 Hβ 分子筛。在 0.10 mol/L 碱浓度下,采用浸渍法制备 Fe-多
级孔 Hβ 分子筛(Fe-Hβ-B 0.10 )。通过 XRD、XRF、N 2 吸附-脱附、SEM-EDS、傅里叶变换红外光谱、NH 3 -TPD
和 Py-FTIR 对样品进行了表征。结果表明,适当的碱浓度处理在保持 Hβ 分子筛微孔骨架的同时,引入了介孔,
Fe-多级孔 Hβ 分子筛仍能保持微介孔结构,活性组分 Fe 2 O 3 能够很好地分散在载体表面。以苯和氯化苄为原料,
考察其催化合成二苯甲烷的性能。与 Fe-Hβ-B 0 催化剂相比,Fe-多级孔 Hβ 有效地提高了反应物和产物的扩散性
能,氯化苄的转化率、二苯甲烷的选择性分别提高了 9.4%和 3.2%。Fe-多级孔 Hβ 催化剂重复使用 3 次后仍然
保持较好的催化活性。
关键词:多级孔 Hβ;制备;烷基化;二苯甲烷;催化技术
中图分类号:TQ426.94 文献标识码:A 文章编号:1003-5214 (2019) 06-1118-06
Preparation and Catalytic Benzylation Performance of
Fe-hierarchical Porous Hβ
*
SU Wei, CHEN Zheng-li, HAN Na, SHEN Jian, WANG Lei , LIU Shu, YANG Li-na
(College of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, Liaoning, China)
Abstract: Hierarchical porous Hβ molecular sieve was obtained by treating Hβ molecular sieve with NaOH
solution. Fe-hierarchical porous Hβ molecular sieve was prepared by impregnation method in 0.10 mol/L
alkali solution. The samples were characterized by XRD, XRF, N 2 adsorption-desorption, SEM-EDS, FTIR,
NH 3-TPD and Py-FTIR. The results showed that proper alkali concentration treatment could not only
maintain the microporous framework of Hβ molecular sieve, but also introduce mesopores. Fe-hierarchical
porous Hβ molecular sieve also could maintain the micro-mesoporous structure, and the active component
Fe 2O 3 could be well dispersed on the surface of the carrier. The catalytic synthesis of diphenylmethane from
benzene and benzyl chloride was studied. Compared with Fe-Hβ-B 0 catalyst, Fe-hierarchical porous Hβ
effectively improved the diffusion performance of the reactants and products. The conversion of benzyl
chloride and the selectivity of diphenylmethane were increased by 9.4% and 3.2%, respectively.
Fe-hierarchical porous Hβ still maintained good catalytic activity after repeated use for 3 times.
Key words: hierarchical porous Hβ; preparation; alkylation; diphenylmethane; catalysis technology
Foundation items: National Natural Science Foundation of China (21276120); Program for Liaoning
Excellent Talents in University (LJQ2015062); Program of Department of Science & Technology of
Liaoning Province (20170540585)
[1]
二苯甲烷(简写 DMP)是一种重要的医药中间 香剂 。目前,工业上采用苯与氯化苄的苄基化反
体,也是许多精细化学品的关键相关物质,可作为 应生成二苯甲烷。典型的苄基化反应可以通过液体
[2]
农药杀虫剂的增效剂,也可以在香料行业中制造保 酸,如硫酸、氢氟酸进行 。由于这些催化剂在使
收稿日期:2018-10-10; 定用日期:2019-02-12; DOI: 10.13550/j.jxhg.20180742
基金项目:国家自然科学基金(21276120);辽宁省高等学校杰出青年学者成长计划(LJQ2015062);辽宁省科学技术厅项目
(20170540585)
作者简介:苏 炜(1992—),男,硕士生,E-mail:372549211@qq.com。联系人:王 雷(1963—),女,教授,E-mail:
wl20020121@163.com。