RU2786223C1 - Fuel composition of aviation unleaded gasoline - Google Patents

Abstract

FIELD: aviation gasoline.

SUBSTANCE: invention relates to the composition of aviation gasoline. A fuel composition of aviation gasoline with an octane rating of at least 99.6 according to the motor method is proposed, including alkylate with Т_kk up to 170°C, toluene, m-toluidine, methylcyclopentadienyl manganese, which contains a combination of high-octane oxygenates MTBE and isopropanol, as well as when used as part of a high-boiling m-toluidine is used additive isopropylbenzene in the following ratio, wt.%: alkylate with T_kk up to 170°C to 100; MTBE 12-15; isopropylbenzene 5-10; toluene 0-8; isopropanol 1-5; m-toluidine 1.5-2; methylcyclopentadienyl manganese 0.1-0.2.

EFFECT: development of a fuel composition for high-octane unleaded aviation gasoline.

2 cl, 2 tbl

Description

The invention relates to oil refining and petrochemistry, namely to commercial products of oil refining, in particular to the composition of aviation gasoline.

Aviation gasolines are called fuels for aviation equipment equipped with piston internal combustion engines with spark ignition.

In our country, until 2005, the production of aviation gasoline was carried out in accordance with GOST 1012. Aviation gasoline grades were produced: B-91/115 and B-95/130. At the same time, the most popular was B-91/115 gasoline, which has an octane number (OCM) of at least 91 units, a grade on a rich mixture of at least 115 units. and contains tetraethyl lead (TES) not more than 2.5 g/kg of gasoline. Its analogue is B-92 gasoline, which has a TOC of at least 91.5 units. and grade on a rich mixture of at least 100 units. From 2007 to 2014, aviation gasolines were not produced, due, firstly, to the cessation of domestic production of thermal power plants, which was a mandatory additive to aviation gasolines, and secondly, due to a reduction in consumption.

In the last few years, a lot of work has been done in Russia to restore the production of aviation gasoline. The regulatory framework has been updated - GOST 1012 has been updated, in which only B-91/115 and B-92 brands that are in demand by the current aircraft fleet are left, and GOST 55493 has been developed, which is identical to foreign ASTM D 910 or DEF STAN 91-90 for Avgas brand aviation gasoline 100LL, which is the most popular in the world and is approved for almost all piston aircraft. Currently, B-91/115 grades are produced in accordance with GOST 1012 and Avgas 100LL in accordance with GOST 55493. The production of both grades requires a thermal power plant, which is produced in a small number by a number of foreign companies.

TES is required to meet the requirements of regulatory documents for anti-knock properties. According to GOST 55493, Avgas 100LL requires a minimum RONM of 99.6, in contrast to the EN 228 specification for European motor gasoline, which has a minimum RONM of 85, or US motor gasoline, which requires a minimum octane number (RON + RON) /2 equal to 87. However, there are options for obtaining high-octane aviation gasoline without thermal power plants.

In view of the extremely high toxicity, as well as the high cost of producing TPP, in the last few decades, among research in the field of technologies for the production of aviation gasoline, there has been a tendency to abandon the use of TPP as an additive to aviation gasoline and transfer equipment to operation on unleaded grades.

At the moment, unleaded aviation gasolines with a TOC of at least 91 units are used abroad. (UL91 grade) and not less than 94 units. (UL94 grade) according to ASTM specification D7547. The requirements for the characteristics of these grades according to the specified specification are similar to the requirements for the mass-used leaded grade Avgas 100LL, with the exception of the standards for TSP, grade and lead content (characteristics associated exclusively with the presence of TPP). The identity of the norms for the quality indicators of these brands indicates their close component composition and production technologies.

Part of the piston aircraft fleet still requires exceptionally high-octane gasoline.

Many examples of high-octane aviation gasoline fuel compositions are known from the prior art. Development of unleaded aviation gasolines with leaded antiknock properties, such as Avgas 100LL, has been difficult. At the moment, no solution has been found that allows the production of aviation gasoline with completely identical properties to Avgas 100LL without the use of thermal power plants.

However, there is experience in this direction. Specifications for high-octane grades of aviation gasolines UL102 ASTM D7719 and ASTM D7960 have been developed.

A solution is known [US Patent No. 9035114 May 19, 2015]. The invention describes an unleaded aviation fuel composition that has an MON of at least 99.6, a sulfur content of less than 0.05% by weight, a CHN content of at least 97.2% by weight, an oxygen content of less than 2.8% by weight, T10 max 75°C, T40 at least 75°C, T50 max 105°C, T90 max 135°C, end boiling point less than 190°C, corrected calorific value of at least 43.5 MJ/kg, pressure vapors in the range of 38-49 kPa and contains: 20-35 vol.% toluene having an MON of at least 107; 2-10 vol% aniline; 30-55% by volume of at least one alkylate or alkylate mixture, having an initial boiling point range of 32-60°C and an end-boiling temperature range of 105-140°C, having T40 less than 99°C, T50 less than 100°C, T90 less than 110°C, and the alkylate or alkylate mixture contains isoparaffins with 4-9 carbon atoms, 3-20 vol.% C5 isoparaffins, 3-15 vol.% C7 isoparaffins and 60-90 vol.% C8 isoparaffins in terms of alkylate or an alkylate mixture and less than 1 vol.% C10+ based on the alkylate or alkylate mixture; 7-14 vol% branched alkyl acetate having a branched chain alkyl group of 4-8 carbon atoms; and 8-26 vol.% isopentane in an amount sufficient to achieve a vapor pressure in the range of 38-49 kPa; while the specified fuel composition contains less than 1 vol.% C8 aromatic compounds. The technical result consists in obtaining a high-octane composition of aviation fuel, which has a low oxygen content, a low freezing point, corresponding to the ASTM D910 standard for aviation fuel.

A solution is known [Application US No. 2015175920 06/25/2015]. The invention discloses an unleaded aviation fuel composition that has an MON of at least 99.6, a sulfur content of less than 0.05 wt. %, CHN content of at least 98 wt. %, the oxygen content is less than 2 wt. %, refined calorific value of at least 43.5 MJ/kg, saturated steam pressure in the range from 38 to 49 kPa, including a mixture containing: from 35 vol. % up to 55 vol. % toluene having an OBM of at least 107; from 2 vol. % up to 10 vol. % aniline; from 15 vol. % up to 30 vol. % of at least one alkylate or mixture of alkylates having an initial boiling point in the range from 32°C to 60°C and an end boiling point in the range from 105°C to 140°C, having a boiling point T40 less than 99°C, T50 less than 100°C, T90 less than 110°C, and the alkylate or a mixture of alkylates contains isoparaffins having from 4 to 9 carbon atoms, 3-20 vol. % C5 isoparaffins, 3-15 vol. % C7 isoparaffins and 60-90 vol. % C8 isoparaffins, based on the alkylate or mixture of alkylates, and less than 1 vol. % C10+ hydrocarbons, based on alkylate or mixture of alkylates; from 4 vol. % to less than 10 vol. % branched chain alcohols containing 8 carbon atoms, provided that the branched chain does not include tert-butyl groups; and at least 8 vol. % isopentane in an amount sufficient to achieve a saturation vapor pressure in the range from 38 to 49 kPa; where the fuel composition contains less than 1 vol. % aromatic hydrocarbons C8. The technical result consists in obtaining high-octane unleaded aviation fuel that meets the ASTM D910 standard, which has a high resistance to self-ignition.

A solution is known [US Patent No. 9388357 07/12/2016]. The invention discloses an unleaded aviation fuel composition that has an MON of at least 99.6, a sulfur content of less than 0.05% wt., a CHN content of at least 98 wt. %, the oxygen content is less than 2 wt. %, refined calorific value of at least 43.5 MJ/kg, saturation vapor pressure in the range from 38 to 49 kPa, freezing point lower than -58°C. The technical result consists in obtaining a high-octane aviation fuel composition with improved characteristics, which meets the ASTM D910 standard for aviation fuels.

A solution is known [US Patent No. 9388358 07/12/2016]. The invention describes an unleaded aviation fuel composition that has an MON of at least 99.6, a sulfur content of less than 0.05 wt.%, a temperature T10 of at most 75°C, T40 of at least 75°C, T50 of at most 105 °C, T90 at most 135°C, end boiling point less than 190°C, refined calorific value of at least 43.5 MJ/kg, saturation vapor pressure in the range of 38 to 49 kPa and freezing point lower than - 58°C. The technical result consists in obtaining a high-octane composition of aviation fuel with improved characteristics, which meets the standard for aviation fuels ASTM D910.

A solution is known [US Patent No. 9388359 07/12/2016]. The invention discloses an unleaded aviation gasoline composition that has a low aromatics content, a THC of at least 99.6, a sulfur content of less than 0.05% wt., a T10 temperature of at most 75°C, a T40 of at least 75°C, a T50 105°C at most, T90 at most 135°C, end boiling point less than 210°C, refined calorific value of at least 43.5 MJ/kg, saturation vapor pressure in the range of 38 to 49 kPa, and freezing point less than -58°C. The technical result consists in obtaining a high-octane aviation fuel composition with improved characteristics, which meets the ASTM D910 standard for aviation fuels.

A solution is known [US Patent No. 9127225 08/09/2015]. The invention describes an unleaded aviation fuel composition that has a UOC of at least 99.6, a sulfur content of less than 0.05% wt., a CHN content of at least 97.8 wt. %, the oxygen content is less than 2.2 wt. %, temperature T10 at most 75°C, T40 at least 75°C, T50 at most 105°C, T90 at most 135°C, end point less than 190°C, refined calorific value of at least 43.5 MJ/kg, saturation vapor pressure ranging from 38 to 49 kPa, freezing point lower than -58°C. The technical result consists in obtaining a high-octane aviation fuel composition with improved combustion characteristics, which meets the ASTM D910 standard for aviation fuels.

A solution is known [US Patent No. 9120991 09/01/2015]. The invention discloses an unleaded aviation fuel composition that has an MON of at least 99.6, a sulfur content of less than 0.05 wt.%, a CHN content of at least 97.2 wt.%, an oxygen content of less than 2.8 wt.%, T10 max 75°C, T40 at least 75°C, T50 max 105°C, T90 max 135°C, end point less than 210°C, corrected calorific value at least 43.5 MJ/kg, pressure a pair in the range of 38-49 kPa, and containing: 15-40% by volume of toluene having an MON of at least 107; 2-10 vol% toluidine; 30-55% by volume of at least one alkylate or alkylate mixture, having an initial boiling point range of 32-60°C and an end-boiling temperature range of 105-140°C, having T40 less than 99°C, T50 less than 100°C, T90 less than 110°C, and the alkylate or alkylate mixture contains isoparaffins with 4-9 carbon atoms, 3-20 vol.% C5 isoparaffins, 3-15 vol.% C7 isoparaffins and 60-90 vol.% C8 isoparaffins, based on alkylate or alkylate mixture, and less than 1 vol.% C10+ in terms of alkylate or alkylate mixture; 4-10% by volume branched alkyl acetate having a branched chain alkyl group of 4-8 carbon atoms; and 8-26 vol.% isopentane in an amount sufficient to achieve a vapor pressure in the range of 38-49 kPa; while the fuel composition contains less than 1 vol.% C8 aromatics. The technical result consists in obtaining a high-octane aviation fuel composition having a low oxygen content and meeting the requirements of ASTM D910 for aviation fuel.

However, solutions known from the level are characterized by a high content of compounds of the class of aromatic amines - aniline and its derivatives. These compounds are characterized by extremely low chemical stability, which is reflected in the accelerated accumulation of resins during storage of the fuel containing them. Also, these compounds have a high boiling point. For example, aniline boils at 184°C, and toluidines at 200°C to increase the end point of the boiling point of their containing fuel compositions. The presence of such high-boiling compounds in aviation gasolines in large quantities negatively affects their tendency to form deposits on the surface of combustion chambers, the rate of aging of engine oil and wear of the cylinder-piston group.

Also, in order to achieve the required level of volatility (expressed by saturated vapor pressure), the compositions contain isopentane, which is characterized by a relatively low MON.

The problem of the prior art is solved by the present invention. The technical result of the invention is a fuel composition of high-octane unleaded aviation gasoline. The composition has characteristics that are as close as possible to the characteristics of the massively used brand of leaded aviation gasoline Avgas 100LL.

The technical result is provided by the fuel composition of aviation gasoline with an octane rating of at least 99.6 according to the motor method, including alkylate with T _kk up to 170 ° C, toluene, m-toluidine, methylcyclopentadienyl manganese, characterized in that to regulate the volatility and low-temperature properties of gasoline contains a combination high-octane oxygenates MTBE and isopropanol, and to reduce the final boiling point of gasoline when used as part of high-boiling m-toluidine, the addition of isopropylbenzene is used in the following ratio of components, wt.%:

alkylate with Ткк up to 170°C up to 100 MTBE 12-15 isopropylbenzene 5-10 toluene 0-8 isopropanol 1-5 m-toluidine 1.5-2 methylcyclopentadienyl manganese 0.1-0.2

At the same time, the fuel composition contains additives: antistatic, antioxidant, dye, scavenger of manganese compounds.

The production of the base component - alkylate is carried out by catalytic interaction of isobutane with butylenes or propylene-butylene fraction. Among the catalysts in this process, the most common is sulfuric acid (the process of sulfuric acid alkylation). The product of this process is a broad fraction of the alkylate, having an end point of boiling over 200°C. To be used in the proposed composition, the alkylate obtained in such a process must be subjected to fractionation with the release of a fraction boiling up to 170°C. There are also embodiments of the alkylation process in which hydrofluoric acid is used as a catalyst instead of sulfuric acid. The alkylate formed as a result of this process is characterized by a lighter fractional composition, its end point of boiling is usually up to 180°C. Under certain operating conditions of the plant, it is possible to obtain alkylate with lower end-boiling temperatures. Such an alkylate can be used as a component of the present invention without further fractionation. In the present invention, an alkylate sample with an end point of boiling point of 170°C was used, obtained by isolating the target fraction by distillation of a broad fraction of the alkylate of the sulfuric acid alkylation process.

The toluene used in the present invention is produced at catalytic reforming (platforming) units of narrow hydrocarbon fractions with subsequent extraction. Toluene has higher anti-knock properties compared to alkylate, therefore, in order to increase the knock resistance, its share in the fuel composition should be maximum. The proposed composition contains the maximum amount of toluene, which ensures compliance with such standardized characteristics of aviation gasoline as the specific lower calorific value and the temperature of 50% distillation.

Isopropylbenzene (cumene) is obtained by liquid-phase or vapor-phase alkylation of benzene with propylene according to the Friedel-Crafts reaction. Cumene has high anti-knock properties (OCHM is 105 units) and a relatively high boiling point (152°C). As well as for toluene, the share of cumene in the composition of aviation gasoline is limited by the norm for the specific lower calorific value and the temperature of the 50% distillate.

Methyl tertiary butyl ether (MTBE) is produced by reacting methanol and isobutylene over acid catalysts. It is a well-known and widely used high-octane additive for motor gasolines. It has a high saturated vapor pressure, thus, in addition to anti-knock properties, it increases the volatility of its containing fuel compositions. Like all oxygenates, it has a relatively low value of the specific lower calorific value, which is the main limiting characteristic of its content in aviation gasoline. It also has some solubility in water, which increases the risk of flooding of their containing fuel compositions with subsequent deterioration of low-temperature properties.

Isopropanol (isopropyl alcohol, IPA) is produced by hydration of propylene. Like MTBE, it has high antiknock characteristics and low calorific value. Its traditional purpose in the composition of aviation gasolines is to improve low-temperature properties. As part of the experimental studies underlying this invention, it was surprisingly found that when combined with MTBE, IPA can non-additively increase the vapor pressure of an aviation gasoline composition, thereby solving the problem of low volatility of high-octane aviation gasolines. This effect is disclosed in the present invention.

M-toluidine is a representative of aromatic amines, characterized by high antiknock efficiency. Produced by nitration of toluene followed by reduction. Used in the manufacture of dyes. As mentioned above, at high concentrations, it reduces the chemical stability of fuel compositions containing it and increases their end-boiling point. In the proposed invention, the proportion of m-toluidine is limited to 2% wt, which allows you to maintain the final boiling point and chemical stability indicators at a level not exceeding the regulatory requirements for aviation gasoline. In the present invention, a sample of m-toluidine manufactured by Lanxess was used.

Methylcyclopentadienyltricarbonylmanganese (MCTM) is an organometallic compound previously used as an antiknock additive in motor gasolines. Compared to TES, when added to gasoline in an equivalent amount in terms of metals, it provides a comparable level of anti-knock efficiency with significantly lower toxicity. Among the disadvantages of its containing gasolines, there is an increased tendency to accumulate carbon deposits in the combustion chambers. Therefore, together with it, it is necessary to use scavengers - compounds that reduce the amount of carbon deposits, or contribute to its transformation and removal from the combustion chamber during engine operation. Various organoelement compounds containing phosphorus, sulfur, halogens, molybdenum or silicon can act as such scavengers. In the present invention, MCTM is used in the form of an antiknock additive HITEC 3000 manufactured by Afton Chemical Company.

An analysis of data on the efficiency, physicochemical, and toxicological properties of available compounds of organophosphorus and organosulfur compounds shows that the pair of tert-butyl phosphate and dimethyl sulfoxide looks the most promising. Both compounds are relatively low-toxic, readily soluble in gasoline, and have relatively low boiling and crystallization temperatures. In the present invention, a scavenger is used, consisting of tert-butyl phosphate and dimethyl sulfoxide in the amount of 60% and 40%, respectively. The scavenger was added in an amount of 50% by weight of the added MCTM.

An antioxidant additive is not required in aviation gasolines, but it is recommended that it be used at all times to ensure that the oxidation stability requirements of aviation gasolines are met. Among a number of antioxidants that are specified in the regulatory documents for aviation gasoline, it is most advisable to use 2,6-di-tert-butyl-4-methylphenol, which is produced in Russia at OAO Sterlitamak Petrochemical Plant in the form of Agidol-1 additive. The maximum allowable concentration of an antioxidant in aviation gasoline for the Avgas 100LL brand is 16 mg/kg, and for the B-91/115, B-92 brands - 50 mg/kg. We used a sample of additive Agidol-1 technical grade A according to TU 38.5901237-90.

According to the requirements of TR TS 013, GOST 1012 GOST 55493, aviation gasoline must contain a dye. The following blue dyes can be used: fat-soluble green 6Zh, fat-soluble green anthraquinone in an amount not exceeding 6.0 mg/kg for grades B-91/115, B-92; organic fat-soluble bright blue anthraquinone or 1,4-dialkylamino-anthraquinone for Avgas 100LL in an amount not exceeding 2.7 mg/l. The blue dye Oil Blue B Liquid was used in the work, according to the manufacturer, it is a solution of 1,4-dialkylamino-anthraquinone in xylene and is approved for use in Avgas 100LL aviation gasoline. The maximum concentration of the blue dye Oil Blue B Liquid due to the dilution of the basic substance is 5.6 mg/l.

An antistatic additive is not mandatory for aviation gasolines and is added if necessary in agreement with the consumer. The standards for the content of antistatic additives are established by GOST 55493 for the Avgas 100LL brand. The only approved antistatic additive, a sample of which is presented in the present invention, is Stadis 450, its maximum allowable concentration is 3 mg/dm ³ .

In table. 1 shows the main characteristics of the components used to prepare samples of unleaded aviation gasoline.

As examples of the invention, 4 samples of unleaded aviation gasoline were prepared. The test results of the prepared samples are presented in table. 2, which also contains the standards for leaded aviation gasolines B-91/115 and B-92 in accordance with GOST 1012 and Avgas 100LL in accordance with GOST 55493.

Samples No. 1 and No. 2 contain IPA in the maximum declared concentration of 5% wt. The increased concentration of IPA affects the saturated vapor pressure, the value of which for samples No. 1 and No. 2 exceeds the value for samples No. 3 and No. 4, which contain the same concentrations of MTBE - the lightest component that most strongly affects the saturated vapor pressure of the compositions. Since ICC has a relatively low value of the specific lower calorific value, samples No. 1 and No. 2 also have a reduced value.

Samples No. 1 and No. 2 contain m-toluidine at a concentration of 2% wt. Since this compound is the highest boiling point, it greatly influences the end point of the fuel composition. The quality level of motor fuels is determined, among other things, by the lowest values of the end boiling point, therefore, if possible, it is necessary to strive for the lowest concentrations of high-boiling compounds in them. Due to the low content of m-toluidine, the final boiling point of the presented samples does not exceed 187°C, which, in comparison with many prototypes, indicates the advantage of the present invention. Samples #3 and #4 containing 0.5% less m-toluidine show even lower end point values. The decrease in the end point of boiling is also affected by cumene, compositions with a high content of which (No. 1 and No. 3) have a lower value.

The anti-knock properties expressed by MON are at a high level due to the presence of a combination of effective anti-knock agents - MCTM and m-toluidine. The MON of samples No. 3 and No. 4 is higher than that of samples No. 1 and No. 2 due to the higher content of MCTM, despite the lower content of m-toluidine.

The remaining indicators meet the standards established for the grades B-91/115, B-92 and Avgas 100LL. The presence of oxygenates in the compositions - MTBE and isopropanol does not significantly increase the tendency of the presented compositions to watering, which is expressed by satisfactory values of the "interaction with water" characteristic - the change in the volume of the phases as a result of the analysis did not exceed 0.5 ml.

The presence of relatively easily oxidized compounds - m-toluidine and MCTM did not reduce the stability of the presented compositions - the values of actual and potential resins of less than 2 mg/100 cm ³ , as well as a stability period of more than 12 hours, show an excellent level of chemical stability.

Table 1
The main characteristics of the components for the preparation of aviation unleaded gasoline No.
p/p Name of indicator Component name Alkylate Toluene Cumol MTBE IPS M-toluidine one Detonation resistance:
engine octane number 93.0 102.0 105.0 102.0 95.0 250* 2 Density at 15°С, kg/m ³ 698 870 855.1 746.0 789 983 3 Fractional composition:
distillation start temperature, °С
10% is distilled off at a temperature, °С
50% is distilled off at temperature, °С
90% is distilled off at a temperature, °С
end boiling point, °C
exit, %
remainder, %
losses, % 40.0
93.0
105.0
117.0
170.0
98.5
1.0
0.5 T _bale = 110.6 T _bale = 152.4 T _bale = 55.0 T _bale = 82.4 T _bale = 202.0 4 Saturated vapor pressure, kPa 46.5 8.5 1.0 79.0 13.0 less than 1 five Specific calorific value lower, MJ/kg 44.5 40.6 41.0 38.2 33.5 40.7 *Note - the value of the MON of mixing m-toluidine is indicated

table 2
Component composition of the samples of the proposed composition of aviation gasoline and the results of their tests No.
p/p Component name The content of the component in the sample, % wt. #1 #2 Number 3 #4 one Alkylate with end boiling point 170°C 70.9 64.9 72.3 72.3 2 MTBE 12 fifteen fifteen 12 3 Toluene - eight - eight 4 Cumol 10 five 10 five five Isopropyl alcohol five five one one 6 m-toluidine 2 2 1.5 1.5 7 MCTM 0.1 0.1 0.2 0.2 eight Manganese scavenger (tert-butyl phosphate : dimethyl sulfoxide 60:40) 0.5 g/kg 0.5 g/kg 1 g/kg 1 g/kg nine Antioxidant additive Agidol-1 15 mg/kg 15 mg/kg 15 mg/kg 15 mg/kg 10 Oil Blue B Liquid 5.6 mg/l 5.6 mg/l 5.6 mg/l 5.6 mg/l TOTAL Components 100 100 100 100 No.
p/p Name of indicator Requirements for GOST 1012 for the brand Requirements for Avgas 100LL according to GOST 55493 Test results B-92 B-91/115 one Tetraethyllead content, g/kg of gasoline, not more than 2.0 2.5 0.56 (g / dm ³ ) absence 2 Detonation resistance:
octane number according to the motor method, not less than
grade on a rich mixture, not less than 91.5
100 91
115 99.6
- 101.8
- 102.5
- 103.2
- 102.9
- 3 Specific calorific value, lower, MJ/kg, not less than 42.737 42.947 43.5 42.720 42,400 42.960 43.010 4 Fractional composition:
boiling point, °С, not lower
10% is distilled off at a temperature, °С, not higher
40% is distilled off at a temperature, °C, not lower
50% is distilled off at a temperature, °С, not higher
90% is distilled off at a temperature, °C, not higher
97.5% is distilled off at a temperature, °С, not higher
end boiling point, not higher
balance, %, no more
loss, %, no more 40.0
82.0
-
105.0
145.0
180.0
-
1.5
1.5 specify
75
75
103
135
-
170
1.5
1.5 40.5
71.5
85.4
95.0
129.0
160.0
184.0
1.0
1.0 41.0
73.5
86.0
97.0
128.0
153.0
187.0
1.0
1.0 40.0
75.0
90.0
95.5
130.0
161.0
180.0
1.0
1.0 40.5
71.0
92.0
97.0
128.0
154.5
182.0
1.0
1.0 five Saturated vapor pressure, kPa, within 29.3-49.0 38.0-49.0 45.0 46.5 43.0 42.0 6 Acidity, mg/KOH per 100 cm ³ , no more 1.0 0.3 - less than 0.08 7 Crystallization start temperature, °С, not higher minus 60 minus 60 below minus 60 eight Mass fraction of aromatic hydrocarbons, %, no more specify 35 - 13.4 16.3 12.9 15.9 nine The content of actual resins, mg / 100 cm ^{3 of} gasoline, no more 3 - less than 2 10 The content of mechanical impurities and water absence - absence eleven Mass fraction of sulfur, %, no more 0.03 0.03 less than 0.001 12 Copper plate test withstands withstands withstands 13 Content of water-soluble acids and alkalis absence - absence fourteen The content of mechanical impurities and water absence - absence fifteen Transparency transparent - transparent 16 Period of stability, h, not less eight 12 - over 12 17 Density at 20°С, kg/m ³ specify specify 709.2 716.0 710.4 714.8 eighteen Oxidation resistance (5 h):
potential resins, mg/100 cm ³ , no more - 6 less than 2 less than 2 less than 2 less than 2 nineteen Interaction with water: change in volume, cm ³ , no more - ±2 less than 0.5 twenty Electrical conductivity, pS/m:
- without antistatic additive
- with 3 mg/kg antistatic agent Stadis 450 - -
50-600 90
561 113
528 104
550 130
544

Claims (5)

1. Fuel composition of aviation gasoline with an octane rating of at least 99.6, including alkylate with T _kk up to 170 ° C, toluene, m-toluidine, methylcyclopentadienyl manganese, which contains a combination of high-octane oxygenates MTBE and isopropanol, as well as when used in In the composition of high-boiling m-toluidine, the addition of isopropylbenzene is used in the following ratio of components, wt.%: alkylate with Ткк up to 170°C up to 100 MTBE 12-15 isopropylbenzene 5-10 toluene 0-8 isopropanol 1-5 m-toluidine 1.5-2 methylcyclopentadienyl manganese 0.1-0.2 2. The fuel composition according to claim 1, characterized in that it contains additives: antistatic, antioxidant, dye, scavenger of manganese compounds.