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γ-Butyrolactone from Maleic Anhydride by Hydrogenation nrude Atmospheric Pressure

Shen Wei, Wang Yu, Wu Jingtao, Guo Bailin and Xiang Yifei (Department of Chemistry, Fudan Univers(?)ty Shanghai 200433)  
The catalytic properties of Cu catalysts for hydrogenation of maleic anhydride to γ-butyroiactone have been studied in a fixed-bed flow reactor. A highly selective catalyst XYF-5 has been found after testing a number of catalysts. The effects of reaction conditions on the catalytic activity are examined and a yield of γ-butyrolactone as high as 95% obtained. Results of XRD and AES show that the catalytic activity depends on Cu~2 and the structure of the active unit is (?)—O(□ is oxygen vacancy).
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