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

作　　者：ZHANG Yi-bo WANG De-qiang MIAO Zhen-zhen PAN Xi-qiang ZHANG Zhen-dong YANG Xiang-guang 

机构地区：[1]Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Changehun 130022, P. R. China [2]University of Chinese Academy of Sciences, Beij'ing 100049, P. R. China

出　　处：《Chemical Research in Chinese Universities》2013年第2期319-323,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（No.21177120） and the National High Technology Research and Development Program of China（No.2011AA03A406）.

摘　　要：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 of4：l of NaOH/p-cresol and an oxygen pressure of 1.0 MPa for 3 h.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 of4：l of NaOH/p-cresol and an oxygen pressure of 1.0 MPa for 3 h.

关 键 词：Hydrophobicity P-CRESOL P-HYDROXYBENZALDEHYDE OXIDATION Polyvinylidene fluoride（PVDF） 

分 类 号：TQ244.1[化学工程—有机化工] X701.3[环境科学与工程—环境工程]