一种铁钼法甲醛生产工艺及其催化剂

本发明涉及一种铁钼法甲醛生产工艺及其催化剂。所述方法采用列管反应器，反应器上端为铁钼催化剂、下端为金-铁钼催化剂，制备甲醛过程中，尾气中的CO被催化氧化为CO2，CO2循环回反应器入口稀释原料,并起到抑制甲醇深度氧化的作用，提高整体甲醛的收率。本发明同时还提供了所述金-铁钼催化剂的制备方法。 The invention relates to an iron-molybdenum method formaldehyde production process and a catalyst thereof. According to the method, a tubular reactor is adopted, an iron-molybdenum catalyst is arranged at the upper end of the reactor, a gold-iron-molybdenum catalyst is arranged at the lower end of the reactor, in the formaldehyde preparation process, CO in tail gas is catalytically oxidized into CO2, the CO2 is circulated to an inlet of the reactor to dilute raw materials, the effect of inhibiting deep oxidation of methanol is achieved, and the overall yield of formaldehyde is increased. The invention also provides a preparation method of the gold-iron molybdenum catalyst.