Abstract

Catalytic properties of ASM amorphous mesoporous aluminosilicates with different SiO₂/Al₂O₃ molar ratios (20, 40, 80) in oligomerization of 1-pentene and isoamylene fraction were studied. The yield of pentene oligomers is maximal on ASM-20 aluminosilicate and decreases with an increase in the SiO₂/Al₂O₃ molar ratio. The optimum conditions for preparing 1-pentene oligomers in the maximal yield (92–94%) were determined: 150–180°C, 10% catalyst. The yields of the oligomers obtained from the isoamylene fraction on ASM-20 and ASM-40 aluminosilicates are 76 and 74%, respectively (110°C, 10% catalyst), with dimers prevailing. Comparison of the catalytic properties of ASM-20 and 40 mesoporous aluminosilicates and H-Beta zeolite in oligomerization of these monomers shows that their activity is close, but the mesoporous materials exhibit higher stability in oligomerization. In addition, ASM aluminosilicates allow preparation of oligomers with broader molecular-mass distribution.

中文翻译：

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C5 烯烃在无定形介孔铝硅酸盐上的低聚反应

摘要

_{研究了不同SiO 2} /Al ₂ O ₃摩尔比（20、40、80）的ASM无定形介孔硅铝酸盐在1-戊烯和异戊烯馏分齐聚中的催化性能。戊烯低聚物的产率在 ASM-20 铝硅酸盐上最大，随着 SiO ₂ /Al ₂ O _{3的增加而降低}摩尔比例。确定了以最大收率 (92–94%) 制备 1-戊烯低聚物的最佳条件：150–180°C，10% 催化剂。从 ASM-20 和 ASM-40 铝硅酸盐上的异戊烯馏分获得的低聚物的产率分别为 76% 和 74%（110°C，10% 催化剂），其中二聚体占优势。比较ASM-20和40介孔硅铝酸盐和H-β沸石在这些单体齐聚中的催化性能表明，它们的活性接近，但介孔材料在齐聚中表现出更高的稳定性。此外，ASM 铝硅酸盐允许制备具有更宽分子量分布的低聚物。