The Intermetallic Catalysts for Oxidative Esterification of Methacrolein to Methyl Methacrylate |
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Authors: | DONG Hai-feng LI Zeng-xi WANG Zheng-ping ZHAO Wei DIAO Yan-yan ZHANG Suo-jiang |
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Affiliation: | 1. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;School of Chemical Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China 2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3. School of Chemical Engineering, Harbin Engineering University, Harbin, Heilongjiang 150001, China 4. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract: | A series of supported intermetallic Pb-Pb catalysts were prepared with the impregnation method by changing the support (silica, molecular sieve or γ-alumina) and the pore size. The chemical states of the two metals were characterized by XPS analysis, the process for producing methyl methacrylate based on the direct oxidative esterification of methacrolein with methanol in the presence of oxygen was performed in a slurry reactor with the above-mentioned catalysts. The influence of the calcination temperature and the kinds of support as well as the pore size on catalytic activity had been extensively investigated. Under the conditions of temperature at 80 ℃, catalyst 3.8% (ω) and the reaction time 2 h, the conversion rate of methacrolein reached 85%, the selectivity and the yield of methyl methacrylate were 90% and 76.5%, respectively. |
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Keywords: | methyl methacrylate methacrolein Pd-Pb catalyst oxidative esterification |
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