共 37 条
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
收藏
页数:7
相关论文