Citation:
ZHANG Rui-Chao, YIN Heng-Bo, SHEN Yu-Tang, JIANG Ting-Shun. Gas Phase Hydrogenation of Maleic Anhydride to Tetrahydrofuran in the Presence of n-Butanol[J]. Chinese Journal of Applied Chemistry,
;2007, 24(11): 1304-1309.
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Cu-Zn-Ti catalysts were prepared by means of coprecipitation method. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, temperature programmed reduction, and H2 adsorption. The catalytic performance of the Cu-Zn-Ti catalysts for the gas phase hydrogenation of maleic anhydride in the presence of n-butanol was studied at 235~280℃ and 1 MPa. The conversion of maleic anhydride was more than 96% and the selectivity of tetrahydrofuran was up to 92.7%. At the same time, n-butanol was converted to hydrogen and butyl butyrate via dehydrogenation, disproportionation, and esterfication. There were two kinds of CuO species present in the calcined Cu-Zn-Ti catalysts. At a lower copper content, the CuO interacted with ZnO and TiO2; at a higher copper content, both the surface-anchored and bulk CuO species were present. Metallic copper(Cu0) produced by the reduction of the CuO species, which strongly interacted with ZnO and TiO2, favored the deep hydrogenation of maleic anhydride. The deep hydrogenation ability of the Cu-Zn-Ti catalyst increased with the increase of lattice distortion of Cu0.
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Keywords:
- maleic anhydride,
- n-butanol,
- hydrogenation,
- tetrahydrofuran,
- Cu-Zn-Ti
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