甲缩醛氧化制高浓度甲醛催化剂的开发与研究

Development of a Catalyst for Oxidation of Methylal to Highly concentrated Formaldehyde

所研制的Mo－Fe－Cr－O甲缩醛氧化制高浓度甲醛催化剂的最适宜工艺条件为反应温度360～380℃，混合气空速7000～10000h(－1)，甲缩醛：O2=1：2（摩尔比）。它具有良好的热稳定性和重现性，催化剂制备技术可靠，小试寿命超过1000h。单管反应器考察结果表明催化剂具有很高的活性和选择性，甲缩醛转化率为100％，甲醛选择性为93．5％～95．4％，具有工业应用价值。

The experiments for oxidation of methylal to formaldehyde were carried out in a single-tube reactor using a ring catalyst prepared in semi-plant scale. Under suitable reaction conditions, i. e., temperature 360～380℃, GHSV 7000～10000h-1 and CH3OCH2OCH3: O2=1: 2 (mole ratio), the conversion of methylal and the selectivity to formaldehyde reaches 100% and 93. 5 % ～ 95. 4%, respectively. The study shows that the catalyst has a good thermal stability and good repeatability for preparation with service life of more than 1000 hours.