Abstract: Catalysts with different acid type and different acid strength distribution are prepared via impregnation method by loading different components on the surface of the support,and the effect of acid strength distribution and acid type on the catalytic performance of the catalyst in catalyzing oligomerization of 1-butene is studied.Results show that the catalytic performance of the catalyst has close relation to its acid strength distribution and acid type.The loading amount of Al2 (SO4)3 has a certain effect on the acid content distribution of the catalyst,with differences mainly reflecting in the medium and strong acid sites.Moreover,the medium and strong acid sites are the active acid sites for this oligomerization reaction.The highest conversion of 1-butene can reach 76.9% over the Al2 (SO4)3/γ-Al2O3 catalyst that loading 0.667 mmol·g-1 of Al2 (SO4).Characterization on the catalyst by NH3-TPD and X-ray diffraction shows that aluminum sulfate is the active material of the catalyst.The activity of the catalyst for 1-butene oligomerization requires the combined actions of L acid and B acid.
殷浩轩, 肖林久, 李文泽, 冉聪, 卢琪, 宋姝宁. 负载Al2(SO4)3型催化剂对1-丁烯齐聚反应的影响[J]. 现代化工, 2020, 40(10): 170-174.
YIN Hao-xuan, XIAO Lin-jiu, LI Wen-ze, RAN Cong, LU Qi, SONG Shu-ning. Research on effect of supported Al2(SO4)3 catalyst on 1-butene oligomerization. Modern Chemical Industry, 2020, 40(10): 170-174.
De Souza R F,Leal B C,de Souza M O,et al.Nickel-catalyzed propylene dimerization in organochloroaluminate ionic liquids:Control of the isomerization reaction[J].Journal of Molecular Catalysis A-Chemical,2007,272(1-2):6-10.
Xue Z,Tuo Zhang,Jinghong Ma,et al.Accessibility and catalysis of acidic sites in hierarchical ZSM-5 prepared by silanization[J].Microporous & Mesoporous Materials,2012,151(11):271-276.
[11]
Hwang A,Kim S,Kwak G,et al.Low temperature oligomerization of ethylene over Ni/Al-KIT-6 catalysts[J].Catalysis Letters,2017,147(6):1303-1314.
[12]
Lavrenov A V,Duplyakin V K.Oligomerization of butenes on borate-containing alumina[J].Kinetics and Catalysis,2009,50(2):235-240.