Exothermic heterogeneously catalyzed partial gas phase oxidation of a starting compound e.g. propylene to a target compound e.g. acrylic acid, comprises oxidizing a gas mixture containing e.g. the starting compound and molecular oxygen

摘要

Conducting an exothermic heterogeneously catalyzed partial gas phase oxidation of an organic starting compound to an organic target compound in two different operating conditions I and II, comprises oxidizing a reaction gas starting mixture containing the organic starting compound, molecular oxygen and at least an inert dilution gas, through a solid bed catalyst present in the tube of a tube bundle reactor to produce a product mixture containing the organic target compound. Conducting an exothermic heterogeneously catalyzed partial gas phase oxidation of an organic starting compound to an organic target compound in two different operating conditions I and II, comprises oxidizing a reaction gas starting mixture containing the organic starting compound, molecular oxygen and at least an inert dilution gas, through a solid bed catalyst present in the tube of a tube bundle reactor to produce a product mixture containing the organic target compound; where: the tubes are surrounded by spaces for adjusting the reaction temperature; at least a fluid thermal carrier is passed in with an inlet temperature (Ti) and passed out with an outlet temperature (To) through the tubes; the outlet temperature is greater than the inlet temperature; the solid bed catalyst is charged with a load (L1) having the organic starting compound in an operating condition I at an inlet temperature (Ti1) and is charged with a load (L2) having the organic starting compound in the operating condition II at an inlet temperature (Ti2); the load (L2) is greater than the load (L1) and the inlet temperature (Ti2) is greater than (Ti1); the inlet temperature (Ti1) is elevated to the inlet temperature (Ti2) during the change of operating condition I to the operating condition II and subsequently the loading of the solid bed catalyst with the organic starting compound increases the (L1) value to the (L2) value.