1,4-丁二醇气相脱氢制备γ-丁内酯研究

Study on Preparation ofγ-Butyrolactone by Gas Phase Dehydrogenation of 1,4-Butanediol

通过研究1,4-丁二醇脱氢催化剂,发现催化剂的活性组分在Cu O/Zn O/Al2O3组分的基础上,引入复合稀土锆、铈等稀有金属改善催化性能,可有效提高催化剂的活性及选择性,制备筛选出CuO/ZnO/Al2O3/Mx(w(Zr O2)=2.5%,n Cu∶:n M∶n Ce=1∶0.2∶0.15)催化剂。并在该催化剂条件下,考察了1,4-丁二醇气相脱氢制备γ-丁内酯的工艺条件,优化了操作指标,研究结果表明,该催化剂在温度210~220℃,压力~0.1 MPa,n(氢气)∶n(1,4-丁二醇)摩尔比13~25∶1,空速~0.5 h^-1条件下,1,4-丁二醇转化率保持在99.6%以上,γ-丁内酯选择性保持在99.5%以上。

By studying 1,4-butanediol dehydrogenation catalyst,it is found that the active component of the catalyst is based on CuO/ZnO/Al2O3 component,and the introduction of rare earth metals such as composite rare earth zirconium and cerium improves the catalytic performance and can effectively improve the activity of the catalyst And selectivity,CuO/ZnO/Al2O3/Mx(w(ZrO2)=2.5%,nCu∶nM∶nCe=1∶0.2∶0.15)catalyst was prepared and screened.Under the condition of the catalyst,the technological conditions for the preparation ofγ-butyrolactone by gas phase dehydrogenation of 1,4-butanediol were investigated,and the operation index was optimized.The research results show that the catalyst has a temperature of 210~220℃and a pressure of^0.1 MPa,hydrogen/alcohol molar ratio 13~25∶1,space velocity^0.5 h^-1,the conversion rate of 1,4-butanediol is kept above 99.6%,and the selectivity of γ-butyrolactone is kept above 99.5%.