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研究了溶胶 凝胶法制备的NiO SiO2 催化剂上温度 ,压力 ,反应时间 ,催化剂用量等工艺条件对顺酐液相选择加氢性能的影响。结果表明 :镍含量为 30 %的NiO/SiO2 气凝胶催化剂在适当的反应条件下顺酐液相加氢可高选择性地获得丁二酸酐和γ 丁内酯。当反应温度 45 3K ,氢压 5 0MPa ,反应时间 8h ,顺酐转化率 10 0 % ,γ 丁内酯的选择性 78 5 7% ;生成丁二酸酐的条件因有或无溶剂而异 ,有溶剂存在时 ,反应温度 398K ,氢压 2 0MPa ;无溶剂在 42 3K ,氢压 1 0MPa ,顺酐转化率和丁二酸酐的选择性达 99 5 %以上
The effects of process conditions such as temperature, pressure, reaction time and amount of catalyst on the selective hydrogenation of maleic anhydride on NiO SiO2 catalyst prepared by sol-gel method were studied. The results show that succinic anhydride and γ-butyrolactone can be selectively obtained by liquid phase hydrogenation of maleic anhydride under appropriate reaction conditions with NiO / SiO2 airgel catalysts containing 30% Ni. When the reaction temperature 45 3K, hydrogen pressure 5 0MPa, reaction time 8h, maleic anhydride conversion rate of 10%, γ-butyrolactone selectivity of 78 5 7%; generated succinic anhydride conditions due to solvent-free or have different, there are In the presence of solvent, the reaction temperature is 398K, the pressure of hydrogen is 20MPa; the solventless pressure is 42MPa at 10MPa, the conversion of maleic anhydride and the selectivity of succinic anhydride are above 99.5%