Method of preparing a base oil from tire pyrolysis oil and a base oil obtainable using the method

Abstract

A method of preparing a base oil from tire pyrolysis oil (TPO), and a base oil obtainable by means of the method exhibiting a biogenic carbon content as measured by ASTM D6866 of at least 1% by weight, a viscosity index (VI) of no more than 110 and containing no oxygen are described.

1 . A method of preparing a base oil having a sulfur content of no more than 1% by weight from a tire pyrolysis oil, comprising the following steps:
 subjecting a tire pyrolysis oil to a hydroprocessing step comprising a hydrotreatment step, so as to obtain a hydroprocessed tire pyrolysis oil, wherein the hydrotreatment step is carried out at a pressure within the range of 50-170 bar, a temperature within the range of 290-370° C., and a liquid hourly space velocity within the range of 0.4-2.0 h −1  in the presence of a base metal catalyst; and,   distillation of the hydroprocessed tire pyrolysis oil obtained from the hydroprocessing step so as to obtain at least two fractions, of which fractions at least one is a base oil.   
     
     
         2 . A method of preparing a base oil having a sulfur content of no more than 1% by weight from a tire pyrolysis oil, comprising the following steps:
 distillation of a tire pyrolysis oil so as to obtain one or more fractions; and,   subjecting the one or more fractions obtained from the distillation step to a hydroprocessing step comprising a hydrotreatment step, wherein the hydrotreatment step is carried out at a pressure within a range of 50-170 bar, a temperature within a range of 290-370° C., and a liquid hourly space velocity within a range of 0.4-2.0 h −1  in the presence of a base metal catalyst, so as to obtain one or more hydroprocessed products, of which products at least one is a base oil.   
     
     
         3 . The method of  claim 1 , wherein the hydroprocessing step additionally includes a catalytic dewaxing step in the presence of a base metal catalyst. 
     
     
         4 . The method of  claim 3 , wherein the catalytic dewaxing step is carried out at a pressure within a range of 100-160 bar; a temperature within a range of 350-400° C.; an LHSV within a range of 0.4-2.0 h −1    
     
     
         5 . The method of  claim 1 , wherein the hydroprocessing step additionally includes a hydrofinishing step. 
     
     
         6 . The method of  claim 1 , wherein a waste oil, a used oil, a pyrolytic plastic waste oil, crude oil, crude oil distillate, VGO, or a combination of any thereof, is provided as a co-feed into the process and is treated together with the tire pyrolysis oil. 
     
     
         7 . The method of  claim 1 , wherein the catalysts used in the method are selected from base metal catalysts. 
     
     
         8 . The method of  claim 1 , wherein the tire pyrolysis oil exhibits a biogenic carbon content as established according to the method ASTM D6866 of at least 1% by weight. 
     
     
         9 . The method of  claim 1 , wherein the tire pyrolysis oil exhibits a biogenic carbon content as established according to the method ASTM D6866 of at least 5%. 
     
     
         10 . A base oil having a sulfur content of no more than 1% by weight, characterized in exhibiting a biogenic carbon content as established according to the method ASTM D6866 of at least 1% by weight, a viscosity index (VI) of no more than 110 and containing essentially no oxygen. 
     
     
         11 . The base oil of  claim 9 , having a biogenic carbon content as established according to the method ASTM D6866 of at least about 5%. 
     
     
         12 . The base oil of  claim 10 , having a viscosity of 3-700 cSt at 40° C. 
     
     
         13 . The method of  claim 2 , wherein the hydroprocessing step additionally includes a catalytic dewaxing step in the presence of a base metal catalyst. 
     
     
         14 . The method of  claim 13 , wherein the catalytic dewaxing step is carried out at a pressure within a range of 100-160 bar; a temperature within a range of 350-400° C.; an LHSV within a range of 0.4-2.0 h −1    
     
     
         15 . The method of  claim 2 , wherein the hydroprocessing step additionally includes a hydrofinishing step. 
     
     
         16 . The method of  claim 2 , wherein a waste oil, a used oil, a pyrolytic plastic waste oil, crude oil, crude oil distillate, VGO, or a combination of any thereof, is provided as a co-feed into the process and is treated together with the tire pyrolysis oil. 
     
     
         17 . The method of  claim 2 , wherein the catalysts used in the method are selected from base metal catalysts. 
     
     
         18 . The method of  claim 2 , wherein the tire pyrolysis oil exhibits a biogenic carbon content as established according to the method ASTM D6866 of at least 1% by weight. 
     
     
         19 . The method of  claim 2 , wherein the tire pyrolysis oil exhibits a biogenic carbon content as established according to the method ASTM D6866 of at least 5%.