Preparation method of carbon dioxide ethane oxide catalyst

The invention belongs to the technical field of chemical catalysts, and particularly relates to a preparation method of a carbon dioxide ethane oxide catalyst. The method is characterized in that a mixed solution of sodium silicate and chromic nitrate is placed in ultrasonic waves, then an ammonium carbonate solution is added to form gel, and the catalyst is prepared through the procedures of forming, aging, drying, roasting and the like. The catalyst prepared by the method is good in physical property, high in thermal stability and low in cost, and when the catalyst is used in a carbon dioxide ethane oxide reaction, the ethane conversion rate is greater than 35%, and the ethylene selectivity is greater than 65%. 本发明属于化工催化剂技术领域，具体涉及一种二氧化碳氧化乙烷催化剂的制备方法。其特征是将硅酸钠和硝酸铬的混合溶液中放置于超声波中，而后加入碳酸铵溶液形成凝胶，经成型、老化、干燥、焙烧等工序制得催化剂。采用本发明方法制备的催化剂物理性能良好，热稳定性高，成本低廉，用于二氧化碳氧化乙烷反应中，乙烷转化率大于35%，乙烯选择性大于65%。