Use of an adsorbent for the removal of liquid, gaseous and/or dissolved constituents from a process stream

Abstract

Use of an adsorbent for the removal of liquid, gaseous and/or dissolved constituents from a process stream, where the adsorbent is a porous material is and/or has been incorporated into a porous material at least 30 vol. % of the pores of which is filled with an extraction liquid and where the affinity between the adsorbent and the constituents to be removed exceeds the affinity between said constituents and the extraction liquid.

1 . Use of an adsorbent for the removal of liquid, gaseous and/or dissolved constituents from a process stream, characterised in that the adsorbent is a porous material and/or has been incorporated into a porous material at least 30 vol. % of the pores of which is filled with an extraction liquid and where the affinity between the adsorbent and the constituents to be removed exceeds the affinity between said constituents and the extraction liquid.  
     
     
         2 . Use according to  claim 1 , characterised in that at least 50 vol. % of the pores is filled with an extraction liquid.  
     
     
         3 . Use according to  claim 1 , characterised in that at least 90 vol. % of the pores is filled with an extraction liquid.  
     
     
         4 . Use according to  claim 1 , characterised in that at least 2.5 wt. % of the porous material takes the form of an adsorbent.  
     
     
         5 . Use according to  claim 1 , characterised in that the adsorbent is selected from the group of activated carbon, carbonised, sulphonated cross-linked polystyrene, and cross-linked polystyrene.  
     
     
         6 . Use according to  claim 1 , characterised in that the adsorbent is incorporated into a porous material obtained by dissolving a polymer in one or more liquid and miscible compounds at a temperature above the upper critical phase separation temperature Tc in the presence of 2.5 to 80 wt. %, calculated on the overall solids content, of a material with adsorbent properties which is solid at said temperature, followed by a lowering of the temperature and the forming of a fibre, film, granulate or powder from the polymer filled with the liquid compounds, optionally followed by the removal of at least part of the liquid therefrom and by refilling or filling up with an extraction liquid to at least 10% of the pore volume.  
     
     
         7 . Use according to  claim 6 , characterised in that the weight percentage of adsorbent amounts to 20 to 60 wt. % of the overall solids content.  
     
     
         8 . Use according to  claim 6 , characterised in that the weight ratio of adsorbent to extraction liquid is in the range of {fraction (1/10)} to {fraction (2/1)}.  
     
     
         9 . Use according to  claim 1 , characterised in that the extraction liquid is diisodecyl phthalate.  
     
     
         10 . Use according to  claim 1 , characterised in that the adsorbent or the porous material into which the adsorbent has been incorporated is present in the form of a granulate or powder having a particle size of 0.1 to 10 mm.  
     
     
         11 . Use according to  claim 1 , characterised in that the material after becoming saturated with the constituent to be extracted is regenerated with steam.