Selective Hydrogenation of Maleic Anhydride over Cu-SnO_2/Al_2O_3

The regulation of products of the maleic anhydride hydrogenation by means of the preparation methods of CuSnO2/Al2O3 was investigated. The catalysts prepared by coprecipitationimpregnation or coprecipitation had high γbutyrolactone selectivity in maleic anhydride hydrogenation (100% selectivity to γbutyrolactone at 94.4% conversion of maleic anhydride was obtained over the catalyst prepared by coprecipitationimpregnation method). High selectivity to succinic anhydride was obtained over catalysts prepared by impregnation method (76.4% selectivity to succinic anhydride at 98.5% conversion of maleic anhydride at 200°C).