Compositions, methods and uses

Abstract

A composition including a pyrolysis oil and, as an additive: (a) one or more nitrogen containing antioxidants is disclosed. An additive composition for a pyrolysis oil including is also disclosed, the additive composition including (a) one or more nitrogen containing antioxidants; and optionally: (b) a copolymer including maleic anhydride derived units and α-olefin derived units; and/or (c) the reaction product of a carboxylic acid and a polyamine. Also disclosed is a method of improving including the oxidation stability of a composition including a pyrolysis oil, the method including adding to the composition (a) one or more nitrogen containing antioxidants, and a related use of said nitrogen containing antioxidants. Such methods and uses are also disclosed for the improvement in storage stability of compositions including a pyrolysis oil.

1 . A composition comprising a pyrolysis oil and, as an additive:
 (a) one or more nitrogen containing antioxidants.   
     
     
         2 . The composition according to  claim 1  wherein the pyrolysis oil is obtained from the pyrolysis of one or polymers selected from polyethylene, polypropylene, PET, rubber and mixtures thereof. 
     
     
         3 . The composition according to  claim 1  which comprises a blended fuel oil comprising a pyrolysis oil and a middle distillate fuel oil. 
     
     
         4 . The composition according to  claim 1 , wherein component (a) comprises (i) acylated nitrogen compounds. 
     
     
         5 . The composition according to  claim 4 , wherein component (i) comprises the reaction product of a polyisobutene-substituted succinic acid or succinic anhydride and a polyethylene polyamine. 
     
     
         6 . The composition according to  claim 1  wherein component (a) comprises (ii) phenylenediamines. 
     
     
         7 . The composition according to  claim 1  wherein component (a) comprises (iii) substituted hydroxylamines. 
     
     
         8 . The composition according to  claim 1 , further comprising (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units. 
     
     
         9 . The composition according to  claim 8  which comprises a copolymer of maleic anhydride and a mixture of α-olefins having 20 to 24 carbon atoms. 
     
     
         10 . The composition according to  claim 1 , further comprising (c) the reaction product of a carboxylic acid and a polyamine. 
     
     
         11 . The composition according to  claim 9  which comprises the reaction product of one or more fatty acids having 10 to 36 carbon atoms and a polyethylene polyamine having from 2 to 8 nitrogen atoms. 
     
     
         12 . An additive composition for a pyrolysis oil comprising:
 (a) one or more nitrogen containing antioxidants; and optionally:   (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units; and/or   (c) the reaction product of a carboxylic acid and a polyamine.   
     
     
         13 . A method of improving the oxidation stability of a composition comprising a pyrolysis oil, the method comprising adding to the composition (a) one or more nitrogen containing antioxidants. 
     
     
         14 . The method according to  claim 13 , further comprising adding to the composition:
 (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units; and/or   (c) the reaction product of a carboxylic acid and a polyamine.   
     
     
         15 . The method of  claim 13 , wherein (a) one or more nitrogen-containing antioxidants to improve the oxidation stability of a composition containing a pyrolysis oil. 
     
     
         16 . The method of  claim 14 , wherein the (a) one or more nitrogen-containing antioxidants and (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units to improve the oxidation stability of a composition containing a pyrolysis oil. 
     
     
         17 . The method of  claim 14 , wherein the (a) one or more nitrogen-containing antioxidants and (c) the reaction product of a carboxylic acid and a polyamine to improve the oxidation stability of a composition containing a pyrolysis oil. 
     
     
         18 . A method of improving the oxidation stability of a composition comprising a pyrolysis oil and one or more nitrogen containing antioxidants, the method comprising adding to the composition:
 (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units; and/or   (c) the reaction product of a carboxylic acid and a polyamine.   
     
     
         19 . The method of  claim 18 , wherein the (b) copolymer comprising maleic anhydride derived units and α-olefin derived units and/or (c) the reaction product of a carboxylic acid and a polyamine to improve the oxidation stability of a composition comprising a pyrolysis oil and one or more nitrogen containing antioxidants. 
     
     
         20 . A method of improving the storage stability of a composition comprising a pyrolysis oil, the method comprising adding to the composition (a) one or more nitrogen containing antioxidants. 
     
     
         21 . The method of  claim 20 , wherein the (a) one or more nitrogen-containing antioxidants to improve the storage stability of a composition containing a pyrolysis oil. 
     
     
         22 . A method of improving the storage stability of a composition comprising a pyrolysis oil and optionally one or more nitrogen containing antioxidants, the method comprising adding to the composition:
 (b) a copolymer comprising maleic anhydride derived units and α-olefin derived units; and/or   (c) the reaction product of a carboxylic acid and a polyamine.   
     
     
         23 . The method of  claim 22 , wherein the (b) copolymer comprising maleic anhydride derived units and α-olefin derived units and/or (c) the reaction product of a carboxylic acid and a polyamine to improve the storage stability of a composition comprising a pyrolysis oil and optionally one or more nitrogen containing antioxidants.