Abstract: A continuous falling film reactor includes a reactor body including chambers for a reaction between first and second reagents. The chambers have a respective inner surface, for the sliding of the first reagent in the form of a thin film, or layer, a device for introducing the first reagent, in particular in the liquid phase, especially in the form of an organic raw material, into the respective chamber and a device for inputting the second reagent, in particular in the gaseous phase, especially in the form of sulphuric anhydride, in the respective one of the chambers. A head introduces the first reagent, in the respective chamber, which head—includes a corresponding nozzle so calibrated to cause a predetermined load loss of said first reagent.

Abstract: A process for heating a pumpable food product comprising the steps of: a) providing a pumpable food product, b) transporting the pumpable food product through a continuous flow passage, c) heating the pumpable food product during at least part of the transporting of step b), characterized in that the flow rate of transportation during step b) comprises phases of acceleration and phases of deceleration, wherein the phases of acceleration and of deceleration periodically repeat.

Abstract: A process for heating a pumpable food product comprising the steps of: a) providing a pumpable food product, b) transporting the pumpable food product through a continuous flow passage, c) heating the pumpable food product during at least part of the transporting of step b), characterised in that the flow rate of transportation during step b) comprises phases of acceleration and phases of deceleration, wherein the phases of acceleration and of deceleration periodically repeat.