Production of additive mixtures

Abstract

The invention relates to a method for producing additive mixtures for fuel oils by mixing at least two additive components in a dynamic mixer or a lamination mixer. The invention further relates to additive mixtures obtained by said method and fuel oil compositions containing said additive mixtures.

1 - 16 . (canceled) 
     
     
         17 . A process for producing additive mixtures for fuel oils, in which at least two components of the additive mixture are mixed in a mixer selected from mixing pumps, wherein the at least two components of the additive mixture comprise
 (i) at least one cold flow improver and   (ii) at least one solvent.   
     
     
         18 . The process according to  claim 17 , wherein said cold flow improver is selected from
 (a) copolymers of ethylene with at least one further ethylenically unsaturated monomer;   (b) comb polymers;   (c) polyoxyalkylenes;   (d) polar nitrogen compounds;   (e) sulfocarboxylic acids or sulfonic acids or derivatives thereof;   (f) poly(meth)acrylic esters;   (g) alkylphenol-aldehyde resins;   and mixtures thereof.   
     
     
         19 . The process according to  claim 17 , wherein said at least one cold flow improver comprises
 (a) at least one copolymer of ethylene with at least one further ethylenically unsaturated monomer.   
     
     
         20 . The process according to  claim 18 , wherein said at least one further ethylenically unsaturated monomer is selected from alkenylcarboxylic esters, (meth)acrylic esters, styrene, styrene derivatives and olefins other than ethylene. 
     
     
         21 . The process according to  claim 18 , wherein said further ethylenically unsaturated monomer comprises vinyl acetate. 
     
     
         22 . The process according to  claim 19 , wherein said at least one cold flow improver also comprises
 (d) at least one polar nitrogen compound.   
     
     
         23 . The process according to  claim 17 , wherein said solvent is selected from aliphatic and aromatic hydrocarbons and mixtures thereof. 
     
     
         24 . The process according to  claim 17 , wherein said at least two components of the additive mixture further comprise
 (iii) at least one further fuel oil additive which is selected from detergent additives, ashless dispersants, demulsifiers, dehazers, carrier oils, cetane number improvers, metal deactivators, corrosion inhibitors, antioxidants, lubricity improvers, defoamers, antistats, stabilizers, color markers, fragrances and mixtures thereof.   
     
     
         25 . The process according to  claim 17 , wherein the mean mixing time is at most 120 seconds. 
     
     
         26 . An additive mixture obtained by a process according to  claim 17 . 
     
     
         27 . A fuel oil composition comprising an additive mixture according to  claim 26 . 
     
     
         28 . The fuel oil composition according to  claim 27 , wherein the fuel oil is a middle distillate.