US EPA

4782164 

Journal Article 

Synthesis of p-Hydroxybenzaldehyde by Liquid-phase Catalytic Oxidation of p-Cresol over PVDF Modified Cobalt Pyrophosphate 

Zhang Yi-bo; Wang De-qiang; Miao Zhen-zhen; Pan Xi-qiang; Zhang Zhen-dong; Yang Xiang-guang 

2013 

Yes 

Chemical Research in Chinese Universities
ISSN: 1005-9040 

29 

2 

319-323 

10.1007/s40242-013-2230-8 

WOS:000317165900027 

The influence of the wettability of a catalyst on the performance of the liquid phase oxidation of p-cresol was investigated. It was found that the surface hydrophobicity of a catalyst, which can be changed by modification with various loadings of polyvinylidene fluoride(PVDF), has a promotion effect on the catalytic performance. At the same time, the reaction parameters such as oxygen pressure, molar ratio of NaOH to p-cresol, reaction temperature and time on the catalytic performance in the liquid-phase oxidation of p-cresol were optimized. As a result, 10%(mass fraction) PVDF modified cobalt pyrophosphate gave the highest conversion of 94.2% of p-cresol with a selectivity of 94.4% for p-hydroxybenzaldehyde at 348 K and a molar ratio of 4:1 of NaOH/p-cresol and an oxygen pressure of 1.0 MPa for 3 h. 

Hydrophobicity; p-Cresol; p-Hydroxybenzaldehyde; Oxidation; Polyvinylidene fluoride(PVDF)