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考察了Sn-P-Li催化剂的制备过程,其中包括Sn-P胶的成胶顺序、成胶终点pH值及Sn-P-Li催化剂的水蒸汽处理条件等对其物化性质和丁烯氧化脱氢反应性能的影响。发现Sn-P-Li催化剂的物化性质和催化性能随成胶时介质的酸、碱性,成胶终点pH值的不同而有明显的差异。水蒸汽处理能明显地改善Sn-P-Li催化剂的选择性和稳定性,但需要针对含锂量不同而选择一个最佳水蒸汽处理温度区。文中还考察并讨论了Sn-P-Li催化剂中Li组份对丁烯在该催化剂上进行氧化脱氢反应时所起的重要作用。
The preparation process of Sn-P-Li catalyst was investigated, including the gelation order of Sn-P glue, the final pH value of the gelling agent and the steam treatment conditions of Sn-P-Li catalyst. Hydrogen Reactivity. It is found that the physicochemical properties and catalytic properties of Sn-P-Li catalyst are obviously different with the acid, alkali and the final pH of the gel forming medium. Steam treatment can significantly improve the selectivity and stability of Sn-P-Li catalyst, but need to select a best steam treatment temperature zone for different lithium content. The important role played by the Li component in the Sn-P-Li catalyst for the oxidative dehydrogenation of butene on the catalyst was also investigated and discussed.