Patent ID: 6919048
Filing Date: 2005-07-19
Classification: B01J

Abstract:
1. A reaction vessel that is elongated substantially along a substantially vertical axis, comprising at least two stages in the vertical direction, in which at least one endothermic or exothermic catalytic reaction is carried out, comprising: at least one catalytic reaction zone ( means ( means for introducing catalyst into the at least one reaction zone and means for extracting catalyst from the at least one reaction zone; at least one means ( means ( means for recovering reaction fluids downstream of the last stage; wherein the thickness of each reaction zone being determined to limit the variation in temperature in said zone and the heat exchange means being adapted to adjust the temperature of the reaction fluids entering the reaction zone to a level substantially at most equal to that of the temperature of the reaction fluids entering the preceding zone, and in which the catalyst is in the form of a moving bed, with substantially gravitational flow, the at least one reaction zone of one stage being connected to that/those of a lower stage via at least one passage with cross section (S