【摘要】 研究了真空条件下四丁基锡(SnBu4)在Pt/HY分子筛超笼表面的接枝反应,并用元素分析、ICP、GC-MS、XRD、FTIR、TG、BET、UV-Vis等方法对产物的组成、结构和性质进行了表征。研究结果表明,SnBu4与Pt/HY分子筛表面羟基可以定量、有选择性地进行化学反应,将确定数目的SnBu3碎片接枝在分子筛的超笼中。经SnBu4改性后的Pt/HY分子筛的骨架结构没有被破坏,接枝反应发生在分子筛表面,BET比表面积和孔体积变小,表面性质发生变化。将改性后的Pt/HY分子筛应用于糠醛气相氢化反应,糠醇的选择性明显增加。更多还原

【Abstract】 The grafting reaction of tetrabutyl tin（SnBu₄）on surface of Pt/HY molecular sieve supercages was studied in vacuum.Composition and structure of the resultant were characterized by FTIR,XRD,UV-Vis,TPR,TPD,TG,BET,ICP,elemental analysis and GC-MS.SnBu₄ could react with superficial hydroxy group of Pt/HY molecular sieve,to result selective and quantitative grafting of SnBu₃ fragments onto surface of molecular sieve supercages without deteriorating crystalline structure of the latter.Grafted Pt/HY molecular sieve was quite different from the original in adsorption behavior.The modified Pt/HY molecular sieve,as catalyst,was used in hydrogenation of furfural to furfuryl alcohol.Selectivity of the alcohol on modified Pt/HY molecular sieve with tetrabutyl tin was higher than that on unmodifide.更多还原