对Pd-Ag/Al2O3催化剂在裂解混合碳四选择加氢制丁烯反应中的性能进行了研究。实验结果表明,1,3-丁二烯加氢生成1-丁烯的选择性与反应器入口1,3-丁二烯浓度和氢/丁二烯比密切相关,在反应器入口温度40℃、反应压力1.0 MPa、液空速40 h 1...对Pd-Ag/Al2O3催化剂在裂解混合碳四选择加氢制丁烯反应中的性能进行了研究。实验结果表明,1,3-丁二烯加氢生成1-丁烯的选择性与反应器入口1,3-丁二烯浓度和氢/丁二烯比密切相关,在反应器入口温度40℃、反应压力1.0 MPa、液空速40 h 1的条件下,当入口丁二烯摩尔分数大于2.6%,1-丁烯选择性维持在66%以上;当入口丁二烯摩尔分数降至2.6%以下时,1-丁烯选择性开始下降;当反应器入口1,3-丁二烯摩尔分数小于1.0%时,出口1,3-丁二烯摩尔分数可降至小于1.0×10-5。当反应器入口1,3-丁二烯摩尔分数为0.50%～0.85%时,1-丁烯选择性随着氢/丁二烯摩尔比的增加呈现线性下降趋势,表明过量的氢气是发生丁烯的异构化和加氢反应的重要原因。H2-TPR和XPS表征结果显示,Pd-Ag/Al2O3中的Pd和Ag还原过程中形成了Pd-Ag合金。展开更多
Some novel manganese and nickel complexes were synthesized by reacting manganese(Ⅱ) dichloride and nickel(Ⅱ) dichloride with pyridyl-imine ligands differing in the nature of the substituents at the imino nitrogen at...Some novel manganese and nickel complexes were synthesized by reacting manganese(Ⅱ) dichloride and nickel(Ⅱ) dichloride with pyridyl-imine ligands differing in the nature of the substituents at the imino nitrogen atom. All the complexes were characterized by analytical and infrared data: for some of them single crystals were obtained, and their molecular structure was determined by X-ray diffraction. The complexes were used in association with methylaluminoxane(MAO) for the polymerization of 1,3-butadiene obtaining active and selective catalysts giving predominantly 1,2 polybutadiene in case of manganese catalysts and exclusively cis-1,4 polybutadiene in case of nickel catalysts.展开更多
文摘对Pd-Ag/Al2O3催化剂在裂解混合碳四选择加氢制丁烯反应中的性能进行了研究。实验结果表明,1,3-丁二烯加氢生成1-丁烯的选择性与反应器入口1,3-丁二烯浓度和氢/丁二烯比密切相关,在反应器入口温度40℃、反应压力1.0 MPa、液空速40 h 1的条件下,当入口丁二烯摩尔分数大于2.6%,1-丁烯选择性维持在66%以上;当入口丁二烯摩尔分数降至2.6%以下时,1-丁烯选择性开始下降;当反应器入口1,3-丁二烯摩尔分数小于1.0%时,出口1,3-丁二烯摩尔分数可降至小于1.0×10-5。当反应器入口1,3-丁二烯摩尔分数为0.50%～0.85%时,1-丁烯选择性随着氢/丁二烯摩尔比的增加呈现线性下降趋势,表明过量的氢气是发生丁烯的异构化和加氢反应的重要原因。H2-TPR和XPS表征结果显示,Pd-Ag/Al2O3中的Pd和Ag还原过程中形成了Pd-Ag合金。
文摘Some novel manganese and nickel complexes were synthesized by reacting manganese(Ⅱ) dichloride and nickel(Ⅱ) dichloride with pyridyl-imine ligands differing in the nature of the substituents at the imino nitrogen atom. All the complexes were characterized by analytical and infrared data: for some of them single crystals were obtained, and their molecular structure was determined by X-ray diffraction. The complexes were used in association with methylaluminoxane(MAO) for the polymerization of 1,3-butadiene obtaining active and selective catalysts giving predominantly 1,2 polybutadiene in case of manganese catalysts and exclusively cis-1,4 polybutadiene in case of nickel catalysts.
