Reactor for chemical conversion of a feedstock with heat inputs and feedstock/catalyst cross-circulation

Abstract

A chemical conversion reactor contains a substantially vertical catalytic bed between an upper end and a lower end and comprises, in combination: close to its upper end, at least one means for introducing a solid catalyst, means for introducing and evacuating said feed allowing its flow in a substantially horizontal direction through the catalytic bed, means for heating said feed integrated into said reactor, said reactor comprising, close to its lower end, at least one means for extraction of the catalyst, which extraction is differentiated between an upstream portion and a downstream portion of said catalytic bed, with respect to the direction of flow of said feed.

1 . A chemical conversion reactor, containing a substantially vertical catalytic bed between an upper end and a lower end, and comprising in combination: 
 close to the upper end of said reactor, at least one means for introducing a solid catalyst;    means for introducing and evacuating said feed allowing its flow in a substantially horizontal direction through the catalytic bed;    means for heating said feed integrated into said reactor;    characterised in that said reactor comprises, close to its lower end, at least one means for extraction of the catalyst, which extraction is differentiated between an upstream portion and a downstream portion of said catalytic bed, with respect to the direction of flow of said feed.    
     
     
         2 . A reactor according to  claim 1 , in which the means for differentiated catalyst extraction is selected from the group formed by continuous and discontinuous extraction means  
     
     
         3 . A reactor according to  claim 1  or  claim 2 , in which the catalytic bed comprises a plurality of catalytic zones separated by non-catalytic zones for heating the feed.  
     
     
         4 . A reactor according to any one of  claims 1  to  3 , in which the most upstream catalyst extraction means differs from the most downstream extraction means in its lower extraction capacity.  
     
     
         5 . A process for chemical conversion of a feed using a reactor according to any one of  claims 1  to  4 .  
     
     
         6 . A chemical conversion process according to  claim 5 , in which the feed is a hydrocarbon feed.  
     
     
         7 . A chemical conversion process according to  claim 5  or  claim 6 , in which catalytic dehydrogenation of a paraffinic hydrocarbon feed is carried out.