Alkyl ethanolamine and biocide combination for hydrocarbon based fuels
A microorganism control combination for water-liquid hydrocarbon systems 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 water-liquid hydrocarbon system 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 is diesel fuel, heating oil, jet fuel or kerosene.
3 . The method of claim 1 wherein said biocidal agent is benzisothiazolin-3-one.
4 . The method of claim 1 wherein said biocidal agent is 2-methyl-5-chloro-4-isothiazolin-3-one.
5 . The method of claim 1 wherein said biocidal agent is 2-(thiocyanomethylthio)benzothiazole.
6 . The method of claim 1 wherein said alkylamine ethoxylate is butyl diethanol amine, butylaminoethanol, diisopropylaminoethanol or mixtures thereof.
7 . The method of claim 1 wherein the ratio of biocidal agent to alkylamine ethoxylate is from about 1:50 to about 2:1.
8 . The method of claim 1 wherein said biocidal agent is added in a concentration of about 100 ppm to about 500 ppm of said system.
9 . The method of claim 1 wherein said systems further comprises emulsifiers, detergents, pH adjusting agents or mixtures thereof.
10 . The method of claim 1 wherein said alkylamine ethoxylate is added in a concentration of about 1000 ppm to about 5000 ppm.
11 . 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.
12 . The method of claim 11 wherein said biocidal agent is benzisothiazolin-3-one.
13 . The method of claim 11 wherein said biocidal agent is 2-methyl-5-chloro-4-isothiazolin-3-one.
14 . The method of claim 11 wherein said biocidal agent is 2-(thiocyanomethylthio)benzothiazole.
15 . The combination of claim 11 wherein said alkylamine ethoxylate is butyl diethanol amine, butylaminoethanol, diisopropylaminoethanol or mixtures thereof.
16 . The combination of claim 11 wherein said ratio of biocidal agent to alkylamine ethoxylate is from about 1:50 to about 2:1.