Patent ID: 6299849
Filing Date: 2001-10-09
Classification: B01J,C01C,Y02P

Abstract:
Method for effecting high yield heterogeneous exothermic synthesis reactions, comprising the steps of:feeding gaseous reagents to a synthesis reactor comprising a shell (2) wherein there are supported, superimposed and in mutually spaced relationship, at least a first catalytic bed (12) extending in an upper portion (2a ) of said shell (2), at least a second catalytic bed (13) and a lowermost catalytic bed (14) and extending in a lower portion (2b ) of said shell (2);reacting said gaseous reagents in said catalytic beds (12, 13, 14); andwithdrawing from the synthesis reactor the reaction products coming from said lowermost catalytic bed (14);characterised in that it further comprises the step of:causing a reaction mixture to flow in said lowermost catalytic bed (14) through a reaction volume smaller than the reaction volume of said second catalytic bed (12), and comprising a catalyst having a reaction activity higher than the activity of the catalyst loaded in the other catalytic beds (12, 13).