Study On Catalyst Of Catalytic Hydrogenation For Sec-Butyl Acetate To Sec-Butyl Alcohol

Sec-butyl alcohol was the important raw material for industrial production of methyl ethyl ketone.The traditional production technolgy of Sec-butyl alcohol is mainly hydration method which has a series of shortcomings,such as serious equipment corrosion,low yield and high energy consumption,so finding new preparation methods of sec-butyl alcohol is of great significance.With the progress of sec-butyl acetate production process and production increase for years, Sec-butyl acetate market is not optimistic so the overall market development of its downstream products is imminent.By ester exchange, hydrolysis and hydrogenation of sec-butyl alcohol sec-butyl acetate can be converted to process one after another.But these methods are in the stage of test in laboratory.In this paper, we study sec-butyl acetate direct hydrogenation sec-butyl alcohol combined ethanol at the same time.A series of solid hydrogenation catalyst was prepared by incipient-wetness impregnation method. The carrier modification and additives of catalyst was studied on the catalyst structure and the influence of sec-butyl acetate catalyzed hydrogenation performance.Also we explores the catalyst preparation process on which influence the mechanical strength of the catalyst.Finally,catalysts with high mechanical strength and good catalytic performance were prepared.A series Characterization methods,such as XRD, TPR, BET and N2O adsorption, NH3-TPD and so on, were used to explore the structure and properties of modified catalysts.And the effects of calcium oxide, magnesium oxide and nickel oxide on catalyst structure, surface state and catalytic hydrogenation activity were systematically studied.Studies have shown that Calcium oxide and aluminum oxide form a series of metal compound oxide to accelerate the surface enrichment of copper oxide.As a additives for electronics, the transfer of electron induced from Cu to B2O3 by Calcium increasing the catalytic hydrogenation activity.Calcium reduces the acid catalyst and improves the product selectivity and the resistance to carbon deposition.Nickel oxide enhance the catalytic hydrogenation activity but promote the product secondary hydrogenation and reduces the yield.The structure of catalyst were optimize by Magnesium oxides which promote the aggregation of copper oxide on catalyst surface improving the conversion rate of sec-butyl acetate,and which reduce the catalyst acidity to increase sec-butyl alcohol and ethanol selectivity. Additive boron oxide enhance the interaction of carrier and active metal oxide, improved the cupric oxide reduction temperature and the surface dispersion of the copper oxide while some cupric oxide can't be reduct and lost the hydrogenation activity. As the active metal, copper oxide has the optimal load.