ZrOCl_2-H_2SO_4/γ-Al_2O_3催化剂的制备及对1-丁烯齐聚反应的催化性能

以γ-Al_2O_3为载体,负载Zr OCl_2和H_2SO_4制备Zr OCl_2-H_2SO_4/γ-Al_2O_3催化剂,并用于1-丁烯齐聚反应。采用气相色谱在线分析,确定产物组成,考察制备条件对催化剂催化活性的影响,通过1-丁烯转化率和主产物选择性确定适宜的反应条件。结果表明,在Zr OCl_2和H_2SO_4负载质量分数为4.5%和焙烧温度500℃条件下制备的催化剂,在反应温度140℃、1-丁烯液时空速2 h-1和N2分压1.4 MPa条件下,表现出较好的催化活性,1-丁烯转化率96.77%,产物以二聚体(C8)为主,选择性85.99%。该催化剂失活后容易再生,且催化活性良好,1-丁烯转化率92.73%,C8选择性86.73%。

Preparation ofZrOCl2-H2SO4/γ-Al2O3 catalyst and study of 1-butene oligomerization

ZrOCl₂-H₂SO₄/γ-Al₂O₃ catalysts were prepared by using γ-Al₂O₃ as the carrier and H₂SO₄ and ZrOCl₂ as the active precursors,and were used for 1-butene oligomerization.The product component and the effect of preparation conditions on the catalytic activity of the catalysts were investigated by the gas chromatography on-line analysis,and the optimum reaction condition was determined by the conversion of 1-butene and the selectivity to the main products.The results showed thatZrOCl₂-H₂SO₄/γ-Al₂O₃ catalyst with 4.5% load mass fraction of ZrOCl₂ and H₂SO₄ calcined at temperature 500 ℃ exhibited good catalytic activity;1-butene conversion of 96.77% and the selectivity to dimer(C₈) of 85.99% were obtained under the condition of reaction temperature 140 ℃,1-butene liquid hourly space velocity 2 h^-1 and N₂ partial pressure 1.4 MPa.The deactivation catalyst was easy to regenerate.The regeneration catalyst possessed good catalytic performace,and 1-butene conversion and the selectivity to C₈ were 92.73% and 86.73%,respectively.