RU1784633C - Fuel composition - Google Patents

Abstract

SUMMARY OF THE INVENTION: A fuel composition based on medium distillation aviation fuel contains 0.01 ± 0.001% biocidal dip (propen-1-yl) sulfone. 2 tab.

Description

The invention relates to the problem of protection against microbiological damage to medium-distant aviation fuels during storage and transportation in a humid tropical climate.

As an antimicrobial additive for petroleum distillate fuels, the use of 1.3,5-triethylhexahydrotriazine is known. However, this additive exhibits insufficient fungicidal activity and is ineffective in fuel systems affected by fungal microflora.

The use of a biocidal additive of the following composition is known: 2,2-hydroxybis- (4,4, b-trimethyl-1,3,2-dioxiborinene), 2,2-1-methyltrimethylenedioxy-bis- (4-methyl- 1,3,2-dioxiborinene).

This additive also does not show sufficient efficacy in aeronautical combustible concentrations (0.01% by weight).

The aim of the invention is to increase the efficiency of the suppression of microorganisms in medium distilled aviation fuels containing an aqueous phase, without changing their physico-chemical and operational properties.

The goal is achieved by using a fuel composition based on hydrocarbon aviation fuel with the addition of di (propen-1-yl) sulfone in the following ratio, wt.%:

Di (propen-1-yl) sulfone 0.01 ± 0.001

Hydrocarbon Fuel Up to 100

Di (propen-1-yl) sulfone is obtained in a single step in 85% yield from industrially available substances.

The described fuel composition is prepared by simply mixing the components.

PRI me R 1. Tests were carried out in accordance with the methodology described in

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GOST 9.023-85 ESZKS. The fuel with the addition of di (propen-1-yl) sulfone (0.01 wt.%) In contact with the water-mineral medium was infected with microorganisms actively developing in the fuel without additives, and was kept under conditions optimal for the development of microorganisms at a temperature 29 ± 2 ° C for 21 days. Microorganisms were used as test cultures: Cladospqrlum resinae fungus and Pseudomonas aeruglnosa bacteria, the most common in aircraft fuel systems, as well as accumulative cultures isolated from jet fuels. Control was considered fuel without additives.

The test results are shown in table 1.

The addition of di (propen-1-yl) sulfone to the fuel at a concentration of 0.011-0.010 wt.% Ensures its biostability. When the concentration is reduced to 0.009 wt.%, The fuel becomes non-biostable. An increase in concentration in excess of 0.011 wt.% Is impractical for technical and economic reasons.

Thus, a fuel composition containing di (propen-1-yl) sulfone as an additive. It has high biocidal and bactericidal properties and effectively inhibits the growth of bacteria and fungi cultures in the presence of an aqueous phase.

PRI me R 2. The fuel composition was based on RT fuel (GOST 10227-86) containing, as an additive, di (propen-1-yl) sulfone in a concentration of 0.01 wt.%, And studies were carried out its physico-chemical and operational properties.

Quality indicators were evaluated, the value of which could be influenced by the introduction of the specified additive into the fuel.

Tests were carried out according to standard methods provided by GOST 10227-86.

The results of the study are given in table. 2. From the data in the table it follows that, according to the physicochemical and operational properties, the fuel composition containing 0.01 wt.% Di (propen-1-yl) sulfone as an additive meets the requirements of GOST 10227-86 -ia fuel for reactive engines of the RT brand.

The technical and economic advantages of the described fuel composition are to increase the reliability of operation of aircraft and reduce labor costs for aircraft maintenance during preflight preparation.

Claims (1)

The claims A fuel composition based on medium-distant aviation fuel with the addition of a biocide additive, characterized in that, in order to increase the efficiency of suppressing the development of microorganisms in the composition, it contains di (propene-1-yl) sulfone as an additive in the following the ratio of components, wt.%: di (propen-1-yl) sulfone 0.01 ± 0.001; medium distillation aviation fuel up to 100. Biocidal activity of di (propen-1-yl) sulfone Additive Concentration, May. .% 0.011 0.010 0.009 0.008 The medium is transparent, the film at the medium-fuel interface and no precipitate. No microorganism growth. The medium is transparent, the film at the medium-fuel interface and no precipitate. No microorganism growth. The medium is transparent, there is a thin film at the medium-fuel interface. There is no sediment. Weak growth of microorganisms. Clouding of the medium, a film of a thickness of 1-3 mm, a slight precipitate is observed. Moderate growth of microorganisms Table 1 State of the environment (Clause 5.3 of GOST 9.023-74) table 2