Method to carry out strongly exothermic oxidizing reactions in pseudo-isothermal conditions
AssigneeAmmonia Casale S.A.
InventorsErmanno Filippi, Enrico Rizzi, Mirco Jarozzo
Life of this patent
Estimating the term…
Abstract
Method and apparatus for carrying out highly exothermic catalyzed reactions, like so-called oxidative reactions, in pseudo-isothermal conditions, for example the reaction for producing nitric acid and the reaction for producing formaldehyde.
Claims7
Method for carrying out highly exothermic oxidative reactions in pseudo-isothermal conditions, between reactants fed in continuous flow to a predetermined catalytic bed, characterized in that at least a part of said continuous flow of reactants is fed at different points of said catalytic bed corresponding to different successive stages of the reaction, at respective different predetermined temperatures and flow-rates.
Method for carrying out highly exothermic oxidative reactions in pseudo-isothermal conditions, between reactants fed in a continuous flow to a predetermined catalytic bed, in which a plurality of heat exchangers is immersed and supported, wherein:
- a plurality of distribution-suppliers is positioned in said catalytic bed, at different points thereof strictly corresponding to different predetermined stages of said oxidative reaction,
- said continuous flow of reactants is divided into a first part or main flow and a second part or control flow with a predetermined temperature and flow-rate,
- said first part or main flow is preheated through heat exchange with said catalytic bed feeding it through said plurality of exchangers,
- said main flow of preheated reactants is recovered and it is fed continuously to said catalytic bed, and
- said second part or control flow is fed to said plurality of distribution-suppliers to inject respective fresh flows of reactants at a predetermined temperature and flow-rate into the catalytic bed.
Dependencies are inferred from the claim text.