A catalytic process for reducing chloride content of a hydrocarbon feed stream

Abstract

A process for reducing a chloride content of a hydrocarbon feed stream involving contacting a hydrocarbon feed stream comprising a chloride containing pyrolysis oil obtained by cracking a chloride containing thermoplastic material with a sulfided catalyst comprising at least one of Co, Mo, and Ni or a catalyst comprising Pd, Pt, Cu, and/or Zn on a catalyst support in the presence of hydrogen gas to reduce one or more organic chloride compounds present in the hydrocarbon feed stream and form a hydrocarbon product stream and HCl. The HCl is removed from the hydrocarbon product stream, wherein the hydrocarbon product stream has a lower chloride content than the hydrocarbon feed stream based on the total weight of the chloride and the total weight of the hydrocarbon feed stream.

1 : A process for reducing a chloride content of a hydrocarbon feed stream, comprising:
 contacting a hydrocarbon feed stream comprising a chloride containing pyrolysis oil with a sulfided catalyst comprising at least one of Co, Mo, and Ni in the presence of hydrogen gas at a temperature of 60-400° C. and a pressure of 25-35 barg to reduce one or more organic chloride compounds present in the hydrocarbon feed stream and form a hydrocarbon product stream and HCl, wherein the chloride containing pyrolysis oil is obtained by cracking a chloride containing thermoplastic material;   removing the HCl from the hydrocarbon product stream;   wherein the chloride containing pyrolysis oil has a boiling point of less than 400° C.; and   wherein the hydrocarbon product stream has a lower chloride content than the hydrocarbon feed stream, wherein the chloride content is based on the total weight of the chloride and the total weight of the hydrocarbon feed stream.   
     
     
         2 : The process of  claim 1 , wherein the hydrocarbon feed stream has a chloride content of greater than 2000 ppmw and less than 5000 ppmw relative to the total weight of the hydrocarbon feed stream and the hydrocarbon product stream has a chloride content of less than 10 ppmw relative to the total weight of the hydrocarbon product stream. 
     
     
         3 : The process of  claim 1 , wherein the molar ratio of the hydrogen gas to the hydrocarbon feed stream is 10:1 to 1:1.5. 
     
     
         4 : The process of  claim 1 , wherein the hydrocarbon feed stream further comprises up to 200 ppmw of a sulfur containing material relative to the total weight of the hydrocarbon feed stream. 
     
     
         5 : The process of  claim 1 , further comprising contacting a sulfur stream comprising no more than 8 wt % of a sulfur containing material relative to the total weight of the sulfur stream with a catalyst comprising at least one of Co, Mo, and Ni to form the sulfided catalyst prior to the contacting of the hydrocarbon feed stream. 
     
     
         6 : The process of  claim 1 , wherein the organic chloride compound is at least one selected from the group consisting of p-chlorotoluene, chlorobenzene, chlorocyclopentane, 1-chlorooctane, and 2-chloro-2-methylbutane. 
     
     
         7 : The process of  claim 1 , wherein the sulfided catalyst comprises at least one selected from the group consisting of CoMo, NiMo, and Ni/Al 2 O 3 . 
     
     
         8 : The process of  claim 1 , wherein the sulfided catalyst is present in a catalyst chamber within a reactor vessel, and the contacting includes feeding the hydrocarbon feed stream into the catalyst chamber of the reactor vessel with a weight hourly space velocity of 1-6 h −1 . 
     
     
         9 : The process of  claim 1 , wherein the sulfided catalyst has a largest dimension of 100 μm to 3 mm. 
     
     
         10 : The process of  claim 1 , wherein the chloride containing pyrolysis oil has a low boiling fraction with a boiling point of less than 190° C. 
     
     
         11 : The process of  claim 1 , wherein the removing includes one or more of stripping, washing, and neutralizing the HCl from the hydrocarbon product stream. 
     
     
         12 : A process for reducing a chloride content of a hydrocarbon feed stream, comprising:
 contacting a hydrocarbon feed stream comprising a chloride containing pyrolysis oil with a catalyst comprising at least one of Pd, Pt, Cu, and Zn on a catalyst support in the presence of hydrogen gas at a temperature of 60-300° C. and a pressure of 25-35 barg to reduce one or more organic chloride compounds present in the hydrocarbon feed stream and form a hydrocarbon product stream and HCl, wherein the chloride containing pyrolysis oil is obtained by cracking a chloride containing thermoplastic material;   removing the HCl from the hydrocarbon product stream;   wherein the chloride containing pyrolysis oil has a boiling point of less than 400° C.; and   wherein the hydrocarbon product stream has a lower chloride content than the hydrocarbon feed stream, wherein the chloride content is based on the total weight of the chloride and the total weight of the hydrocarbon feed stream.   
     
     
         13 : The process of  claim 12 , wherein the hydrocarbon feed stream has a chloride content of greater than 2000 ppmw and less than 5000 ppmw relative to the total weight of the hydrocarbon feed stream and the hydrocarbon product stream has a chloride content of less than 10 ppmw relative to the total weight of the hydrocarbon product stream. 
     
     
         14 : The process of  claim 12 , wherein the molar ratio of the hydrogen gas to the hydrocarbon feed stream is 10:1 to 1:1.5. 
     
     
         15 : The process of  claim 12 , wherein the organic chloride compound is at least one selected from the group consisting of p-chlorotoluene, chlorobenzene, chlorocyclopentane, 1-chlorooctane, and 2-chloro-2-methylbutane. 
     
     
         16 : The process of  claim 12 , wherein the catalyst support is Al 2 O 3 . 
     
     
         17 : The process of  claim 12 , wherein the catalyst is present in a catalyst chamber within a reactor vessel, and the contacting includes feeding the hydrocarbon feed stream into the catalyst chamber of the reactor vessel with a weight hourly space velocity of 1-6 h −1 . 
     
     
         18 : The process of  claim 12 , wherein the catalyst has a largest dimension of 100 μm-3 mm. 
     
     
         19 : The process of  claim 12 , wherein the chloride containing pyrolysis oil has a low boiling fraction with a boiling point of less than 190° C. 
     
     
         20 : The process of  claim 12 , wherein the removing includes one or more of stripping, washing, and neutralizing the HCl from the hydrocarbon product stream.