Regeneration method of heterogeneous catalysts and adsorbents

Abstract

Process for the regeneration of a solid catalyst or of a solid adsorbent wherein the catalyst or the adsorbent is used in the form of a bed in a regeneration zone, in which bed the catalyst is in motion, said process comprising at least one heating step under a reductive atmosphere.

1 . Process for the regeneration of a solid catalyst or of a solid adsorbent wherein the catalyst or the adsorbent is used in the form of a bed in a regeneration zone, in which bed the catalyst is in motion, said process comprising at least one heating step under a reductive atmosphere.  
     
     
         2 . Process according to  claim 1  wherein the said heating step is carried out under a non-oxydative atmosphere.  
     
     
         3 . Process according to claims  1  or  2  carried out between 250 and 650° C.  
     
     
         4 . Process according to  claim 3  carried out between 300 to 550° C.  
     
     
         5 . Process according to one of  claims 1  to  4  wherein the reductive atmosphere is a hydrogen-containing atmosphere.  
     
     
         6 . Process according to one of  claims 1  to  5  wherein after the reductive treatment, a subsequent oxidative treatment is carried out.  
     
     
         7 . Process according to any of  claims 1  to  6  wherein the said bed in motion is selected in the group consisting of mobile or moving beds, circulating or slurry beds, fluidized beds, expanded beds, ebullated beds, and beds such as belt beds or rotary beds.  
     
     
         8 . A process according to any of  claims 1  to  7  wherein the catalyst or the adsorbent contains an amorphous or zeolitic support.  
     
     
         9 . A process according to  claim 1  to  7  wherein the said material contains at least one metal belonging to Group VIII.  
     
     
         10 . A process according to  claim 9  wherein the said material contains palladium.  
     
     
         11 . A process according to  claim 9  wherein the said material contains nickel.  
     
     
         12 . A process according to  claim 9  for the regeneration of a hydrogenation catalyst.  
     
     
         13 . A process according to  claim 10  for the regeneration of a nickel-containing adsorbent.