Mercury and silicon removal from plastic-derived pyrolysis oil

Abstract

A method may comprise removing silicon and/or mercury from a plastic-derived pyrolysis oil to yield a purified plastic-derived pyrolysis oil comprising 5 wppm or less of silicon and/or 1 wppb or less of mercury; and steam cracking the plastic-derived pyrolysis oil in the presence of a steam to produce a product.

1 . A method comprising:
 removing silicon from a plastic-derived pyrolysis oil to yield a purified plastic-derived pyrolysis oil comprising 5 wppm or less of silicon; and   steam cracking the plastic-derived pyrolysis oil in the presence of steam to produce a product.   
     
     
         2 . The method of  claim 1 , wherein steam cracking the plastic-derived pyrolysis oil is further in the presence of a steam cracker feed. 
     
     
         3 . The method of  claim 2  further comprising:
 admixing the purified plastic-derived pyrolysis oil with the steam cracker feed to yield a mixed feed; and 
 steam cracking the mixed feed. 
 
     
     
         4 . The method of  claim 3 , wherein the mixed feed comprises the plastic-derived pyrolysis oil at 1 wt % to 80 wt % based on the weight of the mixed feed. 
     
     
         5 . The method of  claim 1 , wherein removing the silicon from the plastic-derived pyrolysis oil comprises:
 contacting the plastic-derived pyrolysis oil with an adsorbent.   
     
     
         6 . The method of  claim 5 , wherein contacting the plastic-derived pyrolysis oil with the adsorbent is in the presence of hydrogen. 
     
     
         7 . A method comprising:
 removing mercury from a plastic-derived pyrolysis oil to yield a purified plastic-derived pyrolysis oil comprising 1 wppb or less of mercury; and   steam cracking the plastic-derived pyrolysis oil in the presence of a steam to produce a product.   
     
     
         8 . The method of  claim 7 , wherein steam cracking the plastic-derived pyrolysis oil is further in the presence of a steam cracker feed. 
     
     
         9 . The method of  claim 8  further comprising:
 admixing the purified plastic-derived pyrolysis oil with the steam cracker feed to yield a mixed feed; and 
 steam cracking the mixed feed. 
 
     
     
         10 . The method of  claim 9 , wherein the mixed feed comprises the plastic-derived pyrolysis oil at 1 wt % to 80 wt % based on the weight of the mixed feed. 
     
     
         11 . The method of  claim 7 , wherein removing the mercury from the plastic-derived pyrolysis oil comprises:
 contacting the plastic-derived pyrolysis oil with an adsorbent in the presence of hydrogen.   
     
     
         12 . The method of  claim 11  further comprising:
 regenerating the adsorbent. 
 
     
     
         13 . The method of  claim 7 , wherein removing the mercury from the plastic-derived pyrolysis oil comprises:
 passing the plastic-derived pyrolysis oil through a mercury trap.   
     
     
         14 . A method comprising:
 removing silicon and mercury from a plastic-derived pyrolysis oil to yield a purified plastic-derived pyrolysis oil comprising 5 wppm or less of silicon and 1 wppb or less of mercury;   steam cracking the plastic-derived pyrolysis oil in the presence of a steam to produce a product.   
     
     
         15 . The method of  claim 14 , wherein steam cracking the plastic-derived pyrolysis oil is further in the presence of a steam cracker feed. 
     
     
         16 . The method of  claim 15  further comprising:
 admixing the purified plastic-derived pyrolysis oil with the steam cracker feed to yield a mixed feed; and 
 steam cracking the mixed feed. 
 
     
     
         17 . The method of  claim 16 , wherein the mixed feed comprises the plastic-derived pyrolysis oil at 1 wt % to 80 wt % based on the weight of the mixed feed. 
     
     
         18 . The method of one of  claim 14 , wherein removing the silicon from the plastic-derived pyrolysis oil comprises:
 contacting the plastic-derived pyrolysis oil with an adsorbent.   
     
     
         19 . The method of  claim 18 , wherein contacting the plastic-derived pyrolysis oil with the adsorbent is in the presence of hydrogen. 
     
     
         20 . The method of  claim 14 , wherein removing the mercury from the plastic-derived pyrolysis oil comprises:
 contacting the plastic-derived pyrolysis oil with an adsorbent in the presence of hydrogen.   
     
     
         21 . The method of  claim 20  further comprising:
 regenerating the adsorbent. 
 
     
     
         22 . The method of  claim 14 , wherein removing the mercury from the plastic-derived pyrolysis oil comprises:
 passing the plastic-derived pyrolysis oil through a mercury trap.