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考察了不同方法制备的Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３和Ｆｅ２Ｏ３Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３催化剂对丙烯齐聚反应的催化性能。结果表明，Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３的制备方法对催化剂的催化活性有很大的影响。与直接将Ｆｅ２（ＳＯ４）３担载于γ－Ａｌ２Ｏ３上的制备方法相比，先担载Ｆｅ（ＮＯ３）３于γ－Ａｌ２Ｏ３上，焙烧后再担载（ＮＨ４）２ＳＯ４，再焙烧；或先用氨水将Ｆｅ２（ＳＯ４）３溶液调至ｐＨ＝１．２后形成胶体、再担载于γ－Ａｌ２Ｏ３上制备的Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３催化剂的活性都有明显的提高，这些催化剂表现出更强的酸性。用铝胶替代γ－Ａｌ２Ｏ３浸渍于Ｆｅ２（ＳＯ４）３溶液中，焙烧后制得的Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３也表现出较高的活性，其酸量增大。当Ｆｅ２Ｏ３Ｆｅ２（ＳＯ４）３／γ－Ａｌ２Ｏ３催化剂中Ｆｅ２Ｏ３与Ｆｅ２Ｏ（ＳＯ４）３的Ｆｅ原子比为１５、１２、１１时，催化剂表现出较高的丙烯齐聚催化活性。此类催化剂上出现超强酸中心。强酸中心的增强归于Ｆｅ２Ｏ３与ＳＯ２－４的相互作用。
The catalytic performance of Fe2 (SO4) 3 / γ-Al2O3 and Fe2O3Fe2 (SO4) 3 / γ-Al2O3 catalysts prepared by different methods for oligomerization of propylene was investigated. The results show that the preparation of Fe2 (SO4) 3 / γ-Al2O3 has a great influence on the catalytic activity of the catalyst. Compared with the preparation method of directly carrying Fe2 (SO4) 3 on γ-Al2O3, Fe (NO3) 3 is firstly supported on γ-Al2O3, and then (NH4) 2SO4 is roasted and then calcined; The activity of Fe2 (SO4) 3 / γ-Al2O3 catalyst prepared by the reaction of Fe2 (SO4) 3 solution adjusted to pH = 1.2 with ammonia to form colloids and then carried on γ-Al2O3 has been obviously improved. These catalysts Show more acidity. Al 2 O 3 was used instead of γ-Al 2 O 3 to impregnate Fe 2 (SO 4) 3 solution. After calcination, Fe 2 (SO 4) 3 / γ-Al 2 O 3 also showed higher activity and its acid amount increased. When the Fe atom ratio of Fe2O3 to Fe2O (SO4) 3 in the Fe2O3Fe2 (SO4) 3 / γ-Al2O3 catalyst was 15, 12 and 11, the catalyst showed higher oligomerization activity of propylene. Superacid centers appear on these catalysts. The enhancement of strong acid centers is attributed to the interaction of Fe2O3 with SO2-4.