乙二醇选择性氧化制备乙醇酸催化剂体系的研究

制备了用于选择性氧化乙二醇制备乙醇酸的Pt—Bi／Al2O3、Pd—Bi／Al2O3催化剂；考察了负载金属催化剂的含量、氧气压力及反应温度等条件对目标反应产物催化性能的影响。试验结果表明，Pt—Bi／Al2O3催化剂比Pd—Bi／Al2O3具有更佳的催化性能，于343K及300kPa氧气分压等条件下，在含Pt2．0％的Pt—Bi／Al2O3催化剂体系中，乙醇酸的收率可达到93．60％。确定了最佳的乙二醇氧化制备乙醇酸的绿色氧化工艺条件。

Study on the Catalyst System for Selective Oxidation of Glycol to Glycolic Acid

Pt-Bi/Al 2O 3, Pd-Bi/Al 2O 3 catalysts were prepared and utilized for the selective liquid phase oxidation of glycol to glycolic acid. The effect of loading Pt, Pd content value, pressure of oxygen and the reaction temperature on the catalytic properties were investigated. Experimental result shows that the Pt-Bi/Al 2O 3 catalyst has much better catalytic properties than that of Pd-Bi/Al 2O 3 catalyst, under the condition of 343?K, 300?kPa oxygen patial pressure and 2.0%Pt-Bi/Al 2O 3. The yield of glycolic acid reaches as higher as 93.60%. The optimum reaction conditions of this green oxidation reaction are thus determined.