改性Y型分子筛酸性与催化PHA制 PAP性能的关联性探究

Correlation between Acidity of the Modified Y Zeolites and the Performance of Preparation of p-Aminophenol from Phenyl-Hydroxylamine

徐东洋 卜宇豪 王焕 安会勇 何宇鹏 丁晓光

Xu Dongyang Bu Yuhao Wang Huan An Huiyong He Yupeng Ding Xiaoguang

(1.辽宁石油化工大学 化学化工与环境学部，辽宁 抚顺 113001；2.辽宁石油化工大学 计算机与通信工程学院，辽宁 抚顺 113001)

(1. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University， Fushun Liaoning 113001, China;  2. School of Computer and Engineering, Liaoning Shihua University， Fushun Liaoning 113001, China)

关键词: Y型分子筛, 酸性, Bambenger重排, 对氨基苯酚, 选择性

Different NaY molecular sieves, including NaY, HY, USY and Ce-USY, were prepared by in situ hydrothermal process, ion exchange and/or hydrothermal treatment. The effects of isologous Y molecular sieves on p-aminophenol preparation from phenyl-hydroxylamine rearrangement were studied. XRD, N2 adsorptiondesorption and Py-FTIR results showed that although the molecular sieves had differences in crystallinity, they all had the skeleton topology of Y type molecular sieves. The micropore size of HY molecular sieve was about 0.58 nm. NaY molecular sieve had almost no B acid site. For three kinds of other molecular sieves, B acid content ranked in the descending sequence: HY>USY≈Ce-USY, and L acid content ranked in the descending sequence: USY≈Ce-USY>HY. The performance of their catalysts showed that Y-type molecular sieve had the inferior performance, the selectivity and yield of p-aminophenol of target product were less than 15%. So the p-aminophenol product with high yield and purity could be prepared from the smallest amount of reactant only when molecular sieve maintained an appropriate amount of acidity and pore size.

国家自然科学基金项目(No. 21202077)

10.3969/j.issn.1006-396X.2018.02.005