Alkyl ethanolamine and biocide combination for hydrocarbon based fuels

Abstract

A microorganism control combination for liquid hydrocarbon systems containing water is disclosed. The combination is a biocidal control agent and an alkylamine ethoxylate of the formula R X N(CH 2 CH 2 OH) Y wherein R is C 3 to C 18 alkyl or isoalkyl group, X and Y are 1 or 2, Z is 0 or 1, X+Y is not greater than 3, when X or Y is 2 than Z is 0 and when X is 2 the R groups are the same or different C 3 to C 18 alkyl or isoalkyl groups. The combination provides effective microorganism control with reduced concentration of biocidal control agent.

1 . A method of inhibiting the growth of microorganisms in a liquid hydrocarbon system containing water comprising adding to said system a biocidially effective amount of a combination of a biocidal agent and at least one alkyl ethanolamine of the formula  
       R X NH Z (CH 2 CH 2 OH) Y    wherein R is C 3  to C 18  alkyl or isoalkyl group, X and Y are 1 or 2, Z is 0 or 1, X+Y is not greater than 3, when X or Y is 2 than Z is 0 and when X is 2 the R groups are the same or different C 3  to C 18  alkyl or isoalkyl groups.    
   
   
       2 . The method of  claim 1  wherein said liquid hydrocarbon system contains 0.01% to 25% water.  
   
   
       3 . The method of  claim 1  wherein said liquid hydrocarbon is diesel fuel, biodiesel fuel, mixed diesel/biodiesel fuel, heating oil, jet fuel or kerosene.  
   
   
       4 . The method of  claim 1  wherein said biocidal agent is benzisothiazolin-3-one.  
   
   
       5 . The method of  claim 1  wherein said biocidal agent is 2-methyl-5-chloro-4-isothiazolin-3-one.  
   
   
       6 . The method of  claim 1  wherein said biocidal agent is 2-(thiocyanomethylthio)-benzothiazole.  
   
   
       7 . The method of  claim 1  wherein said alkylamine ethoxylate is butyl diethanol amine, butylaminoethanol, diisopropylaminoethanol, dibutylaminoethanol or mixtures thereof.  
   
   
       8 . The method of  claim 1  wherein the ratio of biocidal agent to alkylamine ethoxylate is from about 1:50 to about 2:1.  
   
   
       9 . The method of  claim 1  wherein said biocidal agent is added in a concentration of about 100 ppm to about 8000 ppm of said system.  
   
   
       10 . The method of  claim 1  wherein said biocidal agent is added in a concentration of about 1000 ppm to about 5000 ppm of said system.  
   
   
       11 . The method of  claim 1  wherein said liquid hydrocarbon system further comprises emulsifiers, detergents, pH adjusting agents or mixtures thereof.  
   
   
       12 . A microorganism control combination comprising a biocidal agent and at least one alkyl ethanolamine of the formula  
       R X N(CH 2 CH 2 OH) Y    wherein R is C 3  to C 18  alkyl or isoalkyl group, X and Y are 1 or 2, Z is 0 or 1, X+Y is not greater than 3, when X or Y is 2 than Z is 0 and when X is 2 the R groups are the same or different C 3  to C 18  alkyl or isoalkyl groups.    
   
   
       13 . The method of  claim 12  wherein said alkylamine ethoxylate is butyl diethanol amine, butylaminoethanol, diisopropylaminoethanol, dibutylaminoethanol or mixtures thereof.  
   
   
       14 . The method of  claim 12  wherein the ratio of biocidal agent to alkylamine ethoxylate is from about 1:50 to about 2:1.  
   
   
       15 . The method of  claim 12  wherein said microorganism control combination further comprises emulsifiers, detergents, pH adjusting agents or mixtures thereof.  
   
   
       16 . A method of inhibiting the growth of microorganisms in a liquid hydrocarbon system containing water comprising adding to said system a biocidially effective amount of at least one alkyl ethanolamine of the formula  
       R X NH Z (CH 2 CH 2 OH) Y    wherein R is C 3  to C 18  alkyl or isoalkyl group, X and Y are 1 or 2, Z is 0 or 1, X+Y is not greater than 3, when X or Y is 2 than Z is 0 and when X is 2 the R groups are the same or different C 3  to C 18  alkyl or isoalkyl groups.    
   
   
       17 . The method of  claim 16  wherein liquid hydrocarbon system contains 0.01% to 25% water.  
   
   
       18 . The method of  claim 16  wherein said liquid hydrocarbon is diesel fuel, biodiesel fuel, mixed diesel/biodiesel fuel, heating oil, jet fuel or kerosene.  
   
   
       19 . The method of  claim 16  wherein said alkylamine ethoxylate is butyl diethanol amine, butylaminoethanol, diisopropylaminoethanol, dibutylaminoethanol or mixtures thereof.  
   
   
       20 . The method of  claim 16  wherein said at least one alkyl ethanolamine agent is added in a concentration of about 100 ppm to about 8000 ppm of said system.  
   
   
       21 . The method of  claim 16  wherein said at least one alkyl ethanolamine agent is added in a concentration of about 1000 ppm to about 5000 ppm of said system.  
   
   
       22 . The method of  claim 16  wherein said system further comprises emulsifiers, detergents, pH adjusting agents or mixtures thereof.