Cold flow improver compositions in low-naphthalene solvent naphtha

Abstract

The invention provides a composition comprising A) Solvent Naphtha having a naphthalene content of less than 1% by weight, B) a middle distillate cold flow improver and C) a solubilizing additive selected from aliphatic or alicyclic C 1 - to C 22 -alcohols, cycloaliphatic hydrocarbons and monocyclic aromatic hydrocarbons.

1 . A composition comprising 
 A) Solvent Naphtha having a naphthalene content of less than 1% by weight,    B) a middle distillate cold flow improver and    C) a solubilizing additive selected from the group consisting of aliphatic C 1 - to C 22 -alcohols, alicyclic C 1 - to C 22 -alcohols, cycloaliphatic hydrocarbons monocyclic aromatic hydrocarbons, and mixtures thereof.    
   
   
       2 . The composition as claimed in  claim 1 , wherein constituent C) is a monohydric alcohol.  
   
   
       3 . The composition of  claim 1 , wherein constituent C) is selected from the group consisting of methanol, ethanol, 2-ethylhexanol, cyclohexanol, and mixtures thereof.  
   
   
       4 . The composition as claimed in  claim 1 , wherein constituent C) is a mono- or polycyclic hydrocarbon, or mixtures thereof having from 6 to 12 carbon atoms.  
   
   
       5 . The composition as claimed in  claim 4 , wherein constituent C) is selected from the group consisting of cyclohexane, norbornane, norbornene, and mixtures thereof.  
   
   
       6 . The composition as claimed in  claim 1 , wherein constituent C) is selected from the group consisting of an isomeric nonylphenol, a hydroxybenzenes, a salicylaldehyde, and mixtures thereof.  
   
   
       7 . The composition of  claim 1 , wherein constituent B) is a polymer having from 10 to 40% by weight of vinyl acetate and from 60 to 90% by weight of ethylene.  
   
   
       8 . The composition of  claim 1 , wherein constituent B) is selected from the group consisting of an ethylene/vinyl acetate/vinyl 2-ethylhexanoate terpolymer, ethylene/vinyl acetate/vinyl neononanoate terpolymer, ethylene/vinyl acetate/vinyl neodecanoate terpolymer, and mixtures thereof.  
   
   
       9 . The composition of  claim 1 , wherein constituent B) is a copolymer which comprises ethylene and from 10 to 40% by weight of vinyl acetate or from 1 to 40% by weight of long-chain vinyl esters, and further comprises from 0.5 to 20% by weight of olefin having from 3 to 10 carbon atoms.  
   
   
       10 . The composition of  claim 1 , where constituent B is a salt selected from the group consisting of an amine salt, an imide salt, an amide salt, and mixtures thereof, wherein said salt is composed of a secondary fatty amine having from 8 to 36 carbon atoms.  
   
   
       11 . The composition of  claim 1 , wherein the naphthalene content of constituent A) is at most 0.1% by weight.  
   
   
       12 . The composition of  claim 1 , where constituent A) has an aromatics content of more than 90% by weight.  
   
   
       13 . A method for improving the cold flow properties of a fuel selected from the group consisting of a middle distillate, a biofuel oil, and mixtures thereof, said method comprising adding to the fuel an additive comprising: 
 a) solvent naphtha having a naphthalene content of less than 1% by weight, and,    b) a solubilizing additive selected from the group consisting of a C 1 - to C 22  aliphatic alcohol, a C 1 - to C 22  alicyclic alcohol, a cycloaliphatic hydrocarbon, a monocyclic aromatic hydrocarbon, and mixtures thereof.    
   
   
       14 . The composition of  claim 9 , wherein the long-chain vinyl esters comprise 8 or more carbon atoms per molecule.