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以共沉淀法和球磨法制备了钴铈复合氧化物催化剂,考察了其对对甲酚液相氧化选择得到对羟基苯甲醛的催化性能,用XRD方法对其结构进行了表征.结果表明:球磨法制备的Co/Ce=1的钴铈复合氧化物活性和比活性最高,收醛选择性达81.8%,具有工业应用前景.共沉淀法制备的钴铈复合氧化物的催化性能随处理温度的升高而逐渐改善,证实了氢氧化物为非活性物相,而氧化物物相对液相碱助反应体系是适宜的.
Cobalt-cerium composite oxide catalysts were prepared by coprecipitation method and ball milling method. The catalytic performance of p-cresol oxidation in liquid phase oxidation to p-hydroxybenzaldehyde was investigated. The structure of the particles was characterized by XRD. The results showed that ball milling The cobalt / cerium composite oxide with Co / Ce = 1 prepared by the method has the highest activity and the highest specific activity, the selectivity to the received aldehydes is up to 81.8%, and has the prospect of industrial application. The catalytic performance of the cobalt-cerium composite oxide prepared by the coprecipitation method varies with the treatment temperature Increasing and gradually improved, confirmed the hydroxide as the inactive phase, while the oxide material relative to the liquid phase alkali-assisted reaction system is appropriate.