以固定床气相空气氧化法用 1， 2－丙二醇为原料，自制改性银催化剂合成丙酮醛，对其工艺进行探索指出：进料浓度过高，增加催化剂表面积炭，缩短催化剂寿命，进料合适浓度 40％～ 60％；银催化剂使 1， 2－丙醇转化率达 99％，产品丙酮醛转化率达 68％，使用 1年，丙酮醛转化 Using fixed-bed gas-phase air oxidation method, 1, 2-propanediol as raw material, self-made modified silver catalyst was synthesized and pyrrole was synthesized. The process was explored. The results showed that the feed concentration was too high, catalyst surface charcoal was increased, catalyst life was shortened, Concentration of 40% ~ 60%; silver catalyst to 1, 2 - propanol conversion rate of 99%, the conversion rate of the product acetone ketone 68%, the use of 1 year, pyruvaldehyde conversion