RU1784631C - Fuel composition - Google Patents

Abstract

SUMMARY OF THE INVENTION: A fuel composition based on medium distillated aviation fuel contains 0.01 ± 0.001% of the biocidal additive S-allyl-M- (vinyloxyethyl) dithiocarbamate. 2 tab.

Description

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

As an antimicrobial additive in petroleum distillate topliam, 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 -oxy-bis- (4,4,6-trimethyl-1,3,2-dioxiborinene), 2,2-T-methyltrimethylenedioxy-bis-methsM, 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 physicochemical and operational properties.

This goal is achieved by using a fuel composition based on hydrocarbon aviation fuel with the addition of 3-allyl-1- (vinyloxyethyl) dithiocarbamate in the following ratio, wt.%:

5-Alkyl-M- (vinyloxyethyl)

dithiocarbamate 0.01 ± 0.001

Hydrocarbon

fuelUp to 100

5-Allyl-M- (vinyloxyethyl) dithiocarb - mat is obtained in a single step with a yield of up to 90% of the 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 method described in GOST 9.023-74 ESZKS. Fuel with the additive 8-allyl-M- (vinyloxyethyl) dithiocarbamate (0.01 wt.%) In contact with the aqueous mineral medium was infected with microorganisms actively developing in the fuel without additives, and maintained under conditions optimal for the development of microorganisms at a temperature of 29 ± 2 ° C for 21 days. 6 microorganisms were used as a test culture: Claclosporiurrt reslnae fungus and PseudoTfmnas a eruglnosa 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.

Adding 5-allyl-M- (vinyl- - hydroxyethyl) dithiocarbamate to the fuel at a concentration of 0.010-0.009 wt.% Ensures its biostability. When the concentration decreases to 0.008 wt.%, The fuel becomes non-stable. An increase in concentration in excess of 0.01 wt.% Is impractical because of the possible negative effect of the additive on fuel quality, as well as for technical and economic reasons.

Thus, a fuel composition containing Z-allyl-N- (vinyloxyethyl) dithiocarbamate as an additive has high biocidal properties and effectively inhibits the growth of bacterial and fungal cultures in the presence of an aqueous phase.

PRI me R 2. The fuel composition was composed on the basis of fuel RT (GOST 10227-86), containing as

0

5

0

5

0

5

additives of 8-allyl-M- (vinyloxyethyl) dithio-carbamate at a concentration of 0.01 wt.% and studies of its physicochemical and operational properties were carried out.

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

The tests were carried out according to the standard method provided for by GOST 10227-86.

The results of the study are given in table. 2. From the data of the table it follows that according to the physicochemical and operational properties, the fuel composition containing 0.01 wt.% S-allyl-M- (vinyloxyethyl dithiocarbamate as an additive, meets the requirements of GOST 10227-86 for jet fuel RT brands.

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 S-allyl-M- (vinyloxyethyl) dithiocarbamate as an additive in the following ratio of components, May%: 5-allyl-M- (vinyloxyethyl) dithiocarbamate 0.01 ± 0.001; medium distillation aviation fuel up to 100 The biocidal activity of $ -allyl-S (vinyloxyethyl) dithiocarbamate. The concentration of additives, wt.% 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, there is no film at the interface between the fuel and the sediment. No microorganism growth. Clouding of the medium, film 1-3 mm thick, a slight precipitate. Moderate growth of microorganisms Table 1 State of the environment (GOST 9.023-74) table 2