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Ru/Al_2O_3催化剂上邻苯二甲酸二丁酯加氢合成1,2-环己烷二甲酸二丁酯 被引量:4

Catalytic Hydrogenation of Dibutyl Phthalate to Cyclohexane 1,2-dicarboxylic Acid Dibutyl Ester over Ru/Al_2O_3 Catalyst
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摘要 以浸渍法制备Ru/Al2O3催化剂,研究在高压反应釜中Ru/Al2O3上催化加氢邻苯二甲酸二丁酯(DBP)合成1,2-环己烷二甲酸二丁酯(CDADE)。采用X射线衍射(XRD)、H2程序升温还原(H2-TPR)、扫描电镜(SEM)、X射线能谱仪(EDS)和透射电子显微镜(TEM)对催化剂进行表征。结果表明,Ru负载量为3.0%(质量分数),200℃氢气气氛中还原的Ru/Al2O3催化剂,在催化DBP合成CDADE的反应中具有较高的催化活性。在反应温度80℃、反应压力2.0~2.5 MPa和搅拌转速800 r/min下,DBP转化率和CDADE选择性分别达到99.972%和99.904%,催化剂重复使用9次后仍有较高活性,但继续使用,由于活性组分Ru部分流失、团聚和催化剂表面积炭,催化剂活性有所下降。 Ru/Al2O3 catalysts were prepared by the impregnation method and catalytic hydrogenation of dibutyl phthalate to cyclohexane 1,2-dicarboxylic acid dibutyl ester was carried out in a high pressure reactor. The samples were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM), H2temperature-programmed reduction(H2-TPR), energy dispersive spectrometer(EDS) and transmission electron microscope(TEM). The results showed that Ru/Al2O3 catalyst with Ru loading of 3% exhibited excellent catalytic performance when reduced at 200 ℃. The dibutyl phthalate conversion and 1,2-dicarboxylic acid dibutyl ester selectivity reached 99.904 % and 99.972 %, respectively, under the conditions of 80 ℃, 2.0-2.5 MPa and stirring speed of 800 r/min. Ru/Al2O3 catalyst showed the catalytic stability till reuse nine times. The deactivation of Ru/Al2O3 catalysts was mainly due to the loss and aggregation of Ru and carbonization over catalysts surface.
出处 《化学反应工程与工艺》 CAS CSCD 北大核心 2015年第2期156-163,共8页 Chemical Reaction Engineering and Technology
基金 江苏省科技厅产学研前瞻(BY2012033)
关键词 邻苯二甲酸二丁酯 催化加氢 1 2-环己烷二甲酸二丁酯 ruthenium dibutyl phthalate catalytic hydrogenation cyclohexane 1,2-dicarboxylic aciddibutyl ester
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