Additive mixture for the bactericidal and anticorrosive additization of fuels

Abstract

An additive mixture for fuels including a) at least one N-formal, b) at least one antioxidant and c) at least one corrosion inhibitor. The additive mixture ensures that the additized fuels and lubricants have biocidal and corrosion-inhibiting additization, especially when they include proportions of renewable raw materials, such as biodiesel, and when they are in contact with copper-containing surfaces.

1 . An additive mixture for fuels, comprising:
 a) at least 80% by weight of at least one N-formal selected from the group consisting of N,N′-methylenebis(4-methyloxazolidine), α,α′,α″-trimethyl-1,3,5-triazine-1,3,5-(2H,4H,6H)triethanol, 4,4-dimethyloxazolidine, dimethylolurea, 5-ethyl-3,7-dioxa-1-azabicyclo[3.3.0]octane, 2-(hydroxymethylamino)ethanol, methylenebis(tetrahydro-1,3-bisoxazine), 5-methylolchloro-acetamide, bis(hydroxymethyl)-5,5-dimethylhydantoin, diazolidinylurea, sodium hydroxymethylglycinate and 3,4,4-trimethyloxazolidine, 2,2′,2″-(hexahydro-1,3,5-triazine-1,3,5-triyl)triethanol, tetrahydro-1,3,4,6-tetrakis(hydroxylmethyl)imidazo[4,5-d]imidazole-2,5-(1H,3H)dione (TMAD) and tetramethylolglycoluril,   b) at least 1% by weight of at least one antioxidant selected from the group consisting of sterically hindered phenols, amines, vitamin E and derivatives thereof, and alkyl gallates, and   c) at least 1% by weight of at least one corrosion inhibitor selected from the group consisting of benzotriazole, tolyltriazole and N,N-bis(2-ethylhexyl)((1,2,4-triazol-1-ylmethyl)amine,
 wherein the weight ratio of component b) to component c) is 1:10 to 10:1. 
   
     
     
         2 . The additive mixture according to  claim 1 , wherein the N-formal is N,N′-methylenebis(5-methyloxazolidine). 
     
     
         3 . The additive mixture according to  claim 1 , wherein the antioxidant is selected from the group consisting of 3-tert-butyl-4-hydroxyanisole (BHA), 2,6-di-tert-butyl-p-cresol (BHT), 2,6-di-tert-butylphenol, lauryl gallate and Vitamin E. 
     
     
         4 . The additive mixture according  claim 1 , wherein the corrosion inhibitor is N,N-bis(2-ethylhexyl)((1,2,4-triazol-1-yl)methyl)amine. 
     
     
         5 . The additive mixture according to  claim 1 , wherein the weight ratio of component b) to component c) is 1:4 to 4:1. 
     
     
         6 . The additive mixture according to  claim 1 , wherein said additive mixture is a liquid concentrate, and the component a) is at least 90% by weight of said additive mixture. 
     
     
         7 . The additive mixture according to  claim 1 , wherein said additive mixture is a liquid concentrate and the components b) and c) are each at least 2% by weight of said additive mixture. 
     
     
         8 . The additive mixture according to  claim 1 , comprising
 a) at least 90% by weight of N,N′-methylenebis(5-methyloxazolidine),   b) at least 2% by weight of at least one antioxidant selected from 2,6-di-tert-butylphenol and BHT, and   c) at least 2% by weight of N,N-bis(2-ethylhexyl)((1,2,4-triazol-1-ylmethyl)amine,   wherein the weight ratio of component b) to component c) is 1:4 to 4:1.   
     
     
         9 . A method of biocidal and corrosion-inhibiting additization of a fuel that flows or is stored in a system comprising copper-containing material in contact with said fuel comprising adding to said fuel the additive mixture according to  claim 1 .