Selective Synthesis of p-Cresol by Alkylation of Phenol with Methanol over SiO2-Modified HMCM-22 Catalyst

被引:6
作者
Liu, Zonghui [1 ]
Xie, Dehua [1 ]
Liu, Jiabao [1 ]
Liu, Na [1 ,2 ]
Xue, Bing [1 ]
机构
[1] Changzhou Univ, Sch Petrochem Engn, Jiangsu Key Lab Adv Catalyt Mat & Technol, Gehu Middle Rd 21, Changzhou 213164, Jiangsu, Peoples R China
[2] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
来源
CHEMISTRYSELECT | 2022年 / 7卷 / 17期
基金
中国国家自然科学基金;
关键词
Acidity; Alkylation; Phenol; Shape-selective catalysis; SiO2; HMCM-22; ZEOLITE MCM-22; METHYLATION; TOLUENE; PERFORMANCE; MORPHOLOGY; CARBONATE; ACIDITY; SILICA; XYLENE; TIO2;
D O I
10.1002/slct.202200223
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A series of xSiO(2)/HMCM-22 were prepared by chemical liquid deposition of HMCM-22 with tetraethyl orthosilicate and evaluated in the catalytic synthesis of p-cresol by alkylation of phenol with methanol. Several characterization techniques including N-2 adsorption-desorption, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Pyridine-IR, temperature-programmed desorption of NH3 (NH3-TPD) as well as the probe reaction of m-xylene isomerization and 1,3,5-triisopropyl benzene (1,3,5-TIPB) cracking have been used to analyze the physicochemical properties of xSiO(2)/HMCM-22 catalyst. The conversion of phenol decreased with increasing SiO2 loading of xSiO(2)/HCM-22 catalyst; while the selectivity for p-cresol maximized at x=1 %. The 1 %SiO2/HMCM-22 catalyst was identified as the most efficient catalyst, showing the highest p-cresol selectivity for longer than 15 h under optimized reaction conditions. The high p-cresol selectivity of the catalyst is attributed to the fact that SiO2 covered the acid sites of the external surface of the HMCM-22 and preserved the acid sites in the micropores of zeolite.
引用
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页数:7
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