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Alkyl ethanolamine and biocide combination for hydrocarbon based fuels

a hydrocarbon based fuel and biocidal treatment technology, applied in the field of additives, can solve the problems of unsatisfactory biological activity, contamination of fuel, sludge formation, etc., and achieve the effects of enhancing the activity of biocide, reducing the amount of biocide needed, and inhibiting microbiological activity

Inactive Publication Date: 2006-01-12
ARKEMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0002] The performance of hydrocarbon based fuels such as diesel fuels, gasoline and kerosene can be favorably modified by the addition of performance enhancing additives such as water (emulsified fuel), emulsifiers, biocides, pH modifiers, detergents, etc. One area of current commercial interest is the formulation of emulsified diesel fuel. In diesel-fueled engines, the high flame temperatures reached during combustion increase the tendency for the production of nitrogen oxides (NOx) and sulfur oxides (SOx).
[0010] The present invention relates to a treatment for water-hydrocarbon based fuel system, which provides in part, biocidal control. More particularly, the present invention relates to the addition of a combination of a biocide and at least one alkyl ethanolamine to a water-hydrocarbon based fuel system to inhibit microbiological activity. In hydrocarbon based fuel systems, contact with water either through contamination or intentional can result in undesirable biological activity. The microbiological activity can result in contamination of the fuel, sludge formation, undesirable odor generation, etc. The use of biocidal agents in such systems is known. The present inventors have discovered that the addition of a combination of a biocidal agent and at least one alkyl ethanolamine to such systems results in surprising increased biocidal activity. The combination of the present invention can allow a reduction in the amount of biocide necessary to achieve a given level of control. The alkyl ethanolamine, in addition to enhancing the activity of the biocide, also can provide pH control for the system. Such pH control can reduce possible corrosion problems.

Problems solved by technology

In hydrocarbon based fuel systems, contact with water either through contamination or intentional can result in undesirable biological activity.
The microbiological activity can result in contamination of the fuel, sludge formation, undesirable odor generation, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] A 324 well microtiter plate was employed to evaluate the growth of a microorganism common to water-hydrocarbon based fuel systems, Pseudomonas Aeruginosa (ATCC27853) in with a variety of amines at varying concentrations. The testing employed Trypticase Soy Broth (TSB) as a growth medium and 25 m molar tris (trihydroxymethylmethylamine) as a buffer. The test duration was 24 hours at pH 8.5.

[0020] The amines tested were alkyl ethanolamines: butyldiethanolamine (BDEA), butylaminoethanol (BAE), tert-butylaminoethanol (TBAE) and diisopropylaminoethanol (DIPAE). Alkyl alkanolamines, 2-methyl-2-amino-1-propanol (AMP),) and diglycolamine (DGA) were also tested. The biocide was GROTAN® available from Troy Chemicals of New Jersey. Table I summarizes the test results. The entries in Table 1 are averages of at least four replicate runs for each test.

TABLE 1GROTANGROTANGROTANGROTANGROTANGROTAN0 ppm100 ppm250 ppm500 ppm1000 ppm2000 ppmBacteria / 0.971.191.210.880.360.39mediaPlus2000400020...

example 2

[0022] A culture of mixed enteric bacteria (klebsiella pneumoniae, Proteus vulgarus, Citrobacter sp., Escherichia coli) at pH=9.0 in TSB (trypticase soy broth) media mixed with emulsified oil was prepared. A biocide, GROTAN® {78.5% 1,3,5-(2-hydroxyethyl)-s-triazine solution in water} as sold by Troy Chemicals (Florham Park, N.J.) was added at varying concentrations to the culture in combination with 2500 ppm of one of the four alkanolamines, N-butylaminoethanol (BAE), diethanolamine (DEA), diglycolamine (DGA) or 2-amino-2-methyl-l-propanol (AMP). Optical density measurements were taken every 15 minutes over a 24 hour time period (total of 96 data points). The maximum growth slope was calculated by taking the 10 contiguous data points that result in the highest growth slope (units of OD per time) over the 24 hour period. Those 10 data points were subjected to a least squares linear fit to calculate the maximum growth slope. Table 2 summarizes the maximum growth slopes for these tests...

example 3

[0024] A culture of Pseudomonas aeruginosa (ATCC 10145) at pH=8.5 in TSB (trypticase soy broth) media was prepared. The biocide Proxel DB20 (20% suspension of benzoisothiazolone (BIT) in water), as sold by Avecia, was added at varying concentrations in combination with 1000 ppm or 2000 ppm of the alkanolamines N-butylaminoethanol (BAE), 2-amino-2-methyl-1-propanol (AMP), dibutylaminoethanol (DBAE) or n-octylaminoethanol (OAE). Optical density measurements were taken every 15 minutes over a 24 hour time period (total of 96 data points). The maximum growth slope was calculated by taking the 10 contiguous data points that result in the highest growth slope (units of OD per time) over a 24 hour period. Those 10 data points were subjected to a least squares linear fit to calculate the maximum growth slope. Table 3 summarizes the maximum growth slopes for these tests.

TABLE 3AMPBAEDBAEOAE10002000100020001000200010002000BITppmppmppmppmppmppmppmppm 0 ppm0.4780.290.3330.0000.2280.1140.0000....

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PUM

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Abstract

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 RXN(CH2CH2OH)Ywherein R is C3 to C18 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 C3 to C18 alkyl or isoalkyl groups. The combination provides effective microorganism control with reduced concentration of biocidal control agent.

Description

[0001] The present invention relates to additives for systems of water and hydrocarbon fuels. More particularly, the present invention relates to biocidal treatments for water-hydrocarbon based fuel emulsions that comprise a combination of a biocidal agent and at least one alkyl ethanolamine. [0002] The performance of hydrocarbon based fuels such as diesel fuels, gasoline and kerosene can be favorably modified by the addition of performance enhancing additives such as water (emulsified fuel), emulsifiers, biocides, pH modifiers, detergents, etc. One area of current commercial interest is the formulation of emulsified diesel fuel. In diesel-fueled engines, the high flame temperatures reached during combustion increase the tendency for the production of nitrogen oxides (NOx) and sulfur oxides (SOx). [0003] These are formed from the combination of nitrogen and oxygen in the combustion chamber and from oxidation of organic nitrogen species in the fuel. The rates at which these species f...

Claims

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Application Information

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IPC IPC(8): C10L1/32
CPCC10L1/328
Inventor GERNON, MICHAEL DAVIDDOWLING, CONOR MICHAEL
Owner ARKEMA INC