| abstract |
FIELD: chemistry. n SUBSTANCE: present invention pertains to the method of prolonged heterogeneous catalysed partial oxidation of propene to acrolein in gaseous phase. The initial reaction gaseous mixture, containing propene, molecular oxygen and at least one inert gas-diluting agent, is passed through a fixed catalyst bed at high temperature. The catalysts are such that, their active mass contains at least, one multi-metal oxide, which contains molybdenum and/or tungsten, as well as at least, one of the elements bismuth, tellurium, antimony, tin, and copper. The temperature of the catalyst bed is increased for a period of time. Partial oxidation in gaseous phase is interrupted at least, once in a calendar year, and at 250-550°C temperature of the fixed catalyst bed a gas mixture, containing molecular oxygen, inert gas and, if necessary, water vapour, is passed through the fixed catalyst bed. n EFFECT: proposed method increases the lifespan of the catalyst. n 28 cl, 2 ex |