高比表面多孔结构的γ-Al_2O_3为载体的新型催化剂的开发初探

A NOVEL CATALYST SUPPORTED BY POROUS HIGH SURFACE AREA γ-Al_2O_3

以桃胶与硫酸铝铵为原料,通过调节反应体系的配料比和煅烧工艺,可调控多孔γ-Al2O3的表面积、孔容、孔径大小及尺寸分布。以高比表面的γ-Al2O3为载体制备的磺化聚苯硫醚铑配合物为催化剂,在80℃和不同的压力条件下及不同的溶剂中,对α,ω-十一烯甲酯的氢甲酰化反应进行了研究。反应产物除α,ω-十二醛酯外,无加氢副产物发生,从电子因素和空间位阻等方面对正/异构比和该催化过程进行了分析。

Porous γ-Al2O3 was prepared using peach gum and aluminium ammonium sulfate as raw materials. Its surface area, pore volume, pore size and pore-size distribution can be controlled by adjusting the ratios of raw materials used and the calcination parameters. A novel catalyst, sulfonated polyphenylene sulfide rhodium complex, was distributed on the porous γ-Al2O3 with high specific surface area. Hydroformylation of α,ω-hendecene methyl ester, which occurred at 80℃ in different solvents and under different pressures, was systematically studied. It was revealed that α,ω- lauraldehyde ester was a main reaction product without the presence of hydrogenated by-products. Normal/isomeric ratio and catalytic process were analyzed from the aspects of electron factor, steric hindrance, and so on.