MXPA02007148A

MXPA02007148A - Method of reducing the vapour pressure of ethanol containing motor fuels for spark ignition combustion engines.

Info

Publication number: MXPA02007148A
Application number: MXPA02007148A
Authority: MX
Inventors: Igor Golubkov
Original assignee: Hull Angelica
Priority date: 2000-01-24
Filing date: 2001-01-24
Publication date: 2005-07-01
Also published as: JP4871475B2; SK12222002A3; NO336184B1; BR0107817B1; PL356843A1; YU55802A; HRP20020670B1; CZ305710B6; HK1052023A1; EP1252268A1; AU782062B2; CU23146A3; ATE296342T1; PL194561B1; CN1395611A; BG66039B1; HU230551B1; EA006855B1; IL150624A0; CN1177914C

Abstract

Method of reducing the vapour pressure of a C3 to C12 hydrocarbon based motor fuel mixture containing 0.1 to 20 % by volume of ethanol for conventional spark ignition internal combustion engines, wherein, in addition to an ethanol component (b) and a C3 to C12 hydrocarbon component (a), an oxygen containing additive (c) selected from at least one of the following types of compounds: alcohol other than ethanol, ketone, ether, ester, hydroxy ketone, ketone ester, and a heterocyclic containing oxygen, is used in the fuel mixture in an amount of at least 0.05 by volume of the total fuel, is disclosed. A mixture of fuel grade ethanol (b) and oxygen containing additive (c) usable in the method of the invention is also disclosed.

Description

METHOD TO REDUCE THE PRESSURE OF FUEL STEAM FOR ENGINE CONTAINING ETHANOL FOR COMBUSTION ENGINES BY IGNITION OF SPARK PLACES Field of the Invention. This invention relates to motor fuels, for internal combustion engines by spark plug ignition. More particularly, the invention relates to a method for decreasing the dry vapor pressure equivalent (DVPE) of a fuel composition including a hydrocarbon liquid and ethanol, by using an oxygen-containing additive. The adjustment components of ethanol and DVPE that are used to obtain the fuel composition are preferably derived from renewable raw materials. By means of the method of the invention, motor fuels containing up to 20% by volume are obtained, which satisfy the requirements of the standards for internal combustion engines by ignition of spark plugs that operate on gasoline. Background of the Invention Gasoline is the main fuel for internal combustion engines with spark plug ignition. The increasing use of gasoline results in environmental pollution. The combustion of gasoline derived from crude oil or mineral gas disturbs the balance of carbon dioxide in the atmosphere and causes the effect Ref: 140548 greenhouse. Crude oil reserves are steadily declining, and some countries already face crude oil limitations. The growing concern of environmental protection, the more severe requirements that govern the content of judicial components in exit emissions, and the limitations of crude oil, force the industry to urgently develop alternative fuels that burn more cleanly. The existing global inventory of vehicles and machinery that operates with internal combustion engines by ignition of spark plugs, does not currently allow the complete elimination of gasoline as a fuel for engines. The task of creating alternative fuels for internal combustion engines has existed for some time, and a large number of attempts have been made to use renewable resources to produce motor fuel components. The U.S. patent No. 2,365,009, issued in 1944, describes the combination of Ci-5 alcohols and C3_5 hydrocarbons for use as fuels. In the U.S. patent No. 4,818,250 issued in 1989, the use of limonene obtained from citrus and other plants is proposed, as a fuel for engines, or as a component in mixtures with gasoline. In the U.S. patent No. 5,607.4B6 issued in 1997, novel engine fuel additives comprising terpenes, aliphatic hydrocarbons and lower alcohols are described. Currently, tert-butyl ethers have been widely used as gasoline components. Motor fuels comprising tert-butyl ethers are described in U.S. Pat. No. 4,458,233 granted in 1984. The largest portion of these ethers is obtained by refining petroleum, but it can also be produced from renewable resources. Ethanol is the most promising product for use as a component of motor fuels in gasoline blends. Ethanol is obtained from the processing with gasoline of a renewable raw material, known generically as biomass, which in turn is derived from carbon dioxide under the influence of solar energy.

The combustion of ethanol produces significantly less harmful substances compared to the combustion of gasoline. However, the use of a motor fuel that contains mainly ethanol, requires specially designed engines. At the same time, spark-ignition internal combustion engines, which normally operate on gasoline, can be operated with an engine fuel comprising a mixture of gasoline and no more than about 10% by volume of ethanol. Such a mixture of gasoline and ethanol is currently sold in the United States as gasohol. European regulations concerning gasolines, allow the addition to gasoline of a volume of up to 5% of. ethanol The main disadvantage of ethanol and gasoline mixtures is that for mixtures containing up to about 20% by volume of ethanol, there is an increase in dry vapor pressure equivalent compared to that of the original gasoline. Figure 1 shows the behavior of a dry vapor pressure equivalent (DVPE) as a fusion of the ethanol content of ethanol and summer A92 gasoline blends, and summer and winter A95 gasoline at 37.8 ° C. Gasolines known as A92 and A95 are standard gasolines, which are purchased at gas stations in the United States and in Sweden. A92 gasoline originated in the United States and gasoline A95 in Sweden. The ethanol used was ethanol fuel grade produced by Williams, USA. The DVPE of the mixtures was based on the standard method ASTM D5191 in the SGS laboratory in Stockholm, Sweden. For the range of concentrations in ethanol volume between 5 and 10%, which is of particular interest for use as motor fuel, for standard spark ignition engines, the data in Figure 1 shows that the DVPE of gasoline blends and ethanol can exceed the DVPE of gasoline origin by more than 10%. Since commercial oil companies normally supply the market with gasoline that is already at the maximum allowable DVPE, which is strictly limited by current regrets, the addition of ethanol to such currently commercially available gasoline is not possible. It is known that the DVPE of mixtures of gasoline and ethanol can be adjusted. The U.S. patent No. 5,015,356 granted on May 14, 1991, proposes to reformulate gasoline by eliminating the volatile and non-volatile components of C4-C12 gasoline to produce an intermediate gasoline C3-C9 or Cg-Cio- It is said that such fuels facilitate better addition of alcohol over current gasoline, due to its equivalent of lower dry vapor pressure (DVPE). A disadvantage of this method of adjusting the DVPE of mixtures of gasoline and ethanol, is that in order to obtain such a mixture it is necessary to produce a special reformulated gasoline, which adversely affects the supply chain and results in rising prices for the motor fuel. Also, such gasolines and their mixtures with ethanol have a higher flash point, which impairs the performance properties.

It is known that some chemical components decrease DVPE when added to gasoline or a mixture thereof with ethanol. For example, U.S. No. 5,433,756 issued July 18, 1995, discloses clean combustion chemical promoter compounds that comprise, in addition to gasoline, ketones, nitro-paraffins and also alcohols other than ethanol. It is noted that the composition of the catalytic promoter for clean combustion described in the patent reduces the DVPE of the gasoline fuel. Nothing is mentioned in this patent about the impact of the clean combustion promoting composition in the DVPE of mixtures of gasoline and ethanol. The U.S. patent No. 5,688,295 issued November 18, 1997, provides a chemical compound as an additive for gasoline or as a fuel for standard gasoline engines. In accordance with the invention, an alcohol-based fuel additive is proposed. The fuel additive comprises 20-70% alcohol, from 2.5-20% ketone and ether, 0.03-20% aliphatic and silicon compounds, 5-20% toluene and 4-45% mineral spirits. The alcohol is methanol or ethanol. It is noted in the patent, that the additive improves the quality of the gasoline and specifically decreases the DVPE. The disadvantages of this method of adjusting the DVPE in motor fuels, is that there is a need for large amounts of the additive, nominally not less than 15% by volume of the mixture, and the use of silicon compounds, which form the oxide Silicon for combustion results in increased engine wear. In the patent W09743356, a method is described for decreasing the vapor pressure of an alcohol-hydrocarbon mixture by adding a co-solvent for the hydrocarbon and the alcohol for the mixture. Also disclosed is a spark plug ignition engine fuel composition which includes a branched or straight chain C5-C8 hydrocarbon component, essentially free of olefins, aromatics, benzene and sulfur, in which the hydrocarbon component has an index minimum anti-knock rating of 65, in accordance with ASTM? 2699 and D2700 and a maximum DVPE of 15 psi (1.05 kg / cm2), per ASTM D5191; a fuel grade alcohol, and a co-solvent for the hydrocarbon component and an alcohol, in which the components of the fuel composition are present in the quantities selected to provide an engine fuel with a minimum anti-knock index of 87 and a DVPE maximum of 15 psi (1.05 kg / cm2). The co-solvent used is 2-methyl tetrahydrofuran derived from biomass (MTHF) and other heterocyclic ethers such as pyranes and oxepanes, with MTHF being preferred.

The disadvantages of this method for adjusting the dry vapor pressure equivalent of mixtures of hydrocarbon liquid and ethanol are as follows: (1) It is necessary to use only C5-C8 hydrocarbon components that are straight or branched chain alkanes (i) ) free of such unsaturated compounds such as defines, benzene and other aromatics, (ii) free of sulfur and, as follows from the description of the invention, (iii) the hydrocarbon component is a condensate of a mineral gas or a condensate of a natural gas, - (2) It is necessary to use as a co-solvent for the hydrocarbon and ethanol component only one particular type of oxygen-containing chemical compounds, nominally ethers, including heterocyclic and short-chain ethers, - (3) it is necessary to use a large amount of ethanol in the fuel, of not less than 25%; (4) It is necessary to use a large amount of co-solvent, not less than 20%, of 2-methyltetrahydrofuran and (5) It is required to modify the internal combustion engine by ignition of the spark plug when operating with such combustible composition, and specifically, you must change the computer package on the computer or replace the computer on the board itself.

Thus, it is an object of the present invention to provide a method by which the aforementioned drawbacks of the prior art can be overcome. It is a main objective of the invention, provide a method to reduce the vapor pressure of a fuel mixture based on a C3 to C12 hydrocarbon, containing up to 20% by volume of ethanol for conventional gasoline engines, up to no more than the hydrocarbon vapor pressure C3 to Ci2 same, but at least to meet the standard requirement in gasoline fuel. Brief description of the invention. The aforementioned object of the present invention has been achieved by means of the preamble method of claim 1, characterized in that an oxygen-containing additive selected from at least one of the following types of compounds: alcohol other than ethanol, ketone, ether , ester, hydroxy ketone, ketone ester and a heterocyclic compound containing oxygen, is used in the fuel mixture in an amount of at least 0.05% by volume for the total fuel mixture. Current inventors have found that specific types of compounds that show an oxygen-containing group surprisingly decrease the vapor pressure of an ethanol-gasoline mixture.

This effect can be unexpectedly enriched further by means of specific C6-C12 hydrocarbon compounds. It has also been found that the octane number of the resulting hydrocarbon-based fuel mixture can be surprisingly maintained or even increased by the use of a component. of oxygen of the present invention. In accordance with the present method, up to about 20% by volume of fuel grade ethanol (b) can be used in the complete fuel compositions. The oxygen-containing additives (c) used can be obtained from renewable raw materials, and the hydrocarbon component (a) used, can be any standard gasoline (which does not have to be reformulated) and can optionally contain aromatic and sulfur fractions, and also hydrocarbons obtained from renewable raw materials. By means of the method of the invention, fuels for standard spark plug ignition internal combustion engines can be prepared, the fuels allow such engines to have the maximum performance as when operating on standard gasoline currently on the market. One can also obtain a decrease in the level of toxic emissions at the outlet, and a decrease in fuel consumption, by using the method of the invention.

In accordance with one aspect of the invention, in addition to the dry vapor pressure equivalent (DVPE), the anti-knock index (octane number) can also be desirably controlled. It is still another object to provide an additive mixture of fuel-grade ethanol (b) and oxygen-containing additive (c), and optionally, the additional component (d), with individual hydrocarbons of the Ce-Ci2 fraction or mixtures thereof being the mixture of additives can subsequently be used in the method of the invention, that is, added to the hydrocarbon component (a). The mixture of (b) and (c), and optionally (d), can also be used per se as a fuel for modified engines, that is, gasoline engines that are not of the standard type. The additive mixture can also be used to adjust the octane number and / or to decrease the vapor pressure of a high vapor pressure hydrocarbon component. The additional objects and advantages of the present invention will be apparent from the following detailed description, examples and dependent claims. Brief Description of the Drawings. In Figure 1, the behavior of the dry vapor pressure equivalent (DVPE) is shown as a function of the ethanol content of prior art ethanol and gasoline blends.

In Figure 2, the behavior of the dry vapor pressure equivalent (DVPE) of different fuels of the present invention is shown as a function of the ethanol content thereof. Detailed description of the invention. The current method allows the use of C3-C12 hydrocarbon fractions as a hydrocarbon component (a), including narrower ranges within its wider range, without restriction in the presence of saturated and unsaturated, aromatic and sulfur hydrocarbons. In particular, the hydrocarbon component can be a standard gasoline currently on the market, as well as other hydrocarbon mixtures obtained in the refining of oil, coal carbonization exit gas and chemical recovery, natural gas and synthesis gas. Hydrocarbons obtained from renewable raw materials can also be included. The C3-C12 fractions are usually prepared by fractional distillation or by the mixture of various hydrocarbons. Importantly, and as previously mentioned, component (a) may contain aromatics and sulfur, which are co-produced or naturally occurring in the hydrocarbon component. In accordance with the method of the present invention, the DVPE can be reduced by combustible mixtures containing up to 20% by volume of ethanol, calculated as pure ethanol. In accordance with a preferred modality, the vapor pressure of the fuel mixture containing ethanol based on hydrocarbons is reduced by 50% of the increase in vapor pressure induced by ethanol, more preferably by 80%, and even more preferably the vapor pressure of the fuel mixture containing hydrocarbon-based ethanol, reduced to a vapor pressure corresponding to that of the hydrocarbon-only component, and / or vapor pressure in accordance with any standard requirement in commercially sold gasoline. As will be apparent from the examples, the DVPE can be reduced if desired to a level still lower than that of the used hydrocarbon component. According to a more preferred embodiment, the other properties of the fuel, such as, for example, the octane number, are kept within the required standard limits. This is achieved by adding to the motor fuel composition at least one organic compound containing oxygen (c) other than ethanol. The oxygen-containing organic compound allows the adjustment of (i) the dry vapor pressure equivalent, (ii) the anti-knock index and other performance parameters of the motor fuel composition, as well as (iii) the reduction of fuel consumption. fuel and the reduction of toxic substances in the exhaust emissions of the engine. The compound it contains oxygen (c) binds to oxygen in at least one of the following functional groups: O O I II I I II I - C-O- H - C- -C-O-C- -C-O-C- 0 H H O H O II I I II I H I c - c - c - - c - c - c - o - c 1 I H 0 - H H Such functional groups are present, for example, in the following types of organic compounds that can be used in the present invention: alcohols, ketones, ethers, esters, hydroxy-ketones, ketone esters, and heterocyclics with oxygen-containing rings. The fuel additive can be derived from fossil-based sources or preferably from renewable sources such as biomes. The oxygen-containing fuel additive (c) can typically be an alcohol other than ethanol. In general, aliphatic or alicyclic, saturated and unsaturated alcohols are preferably used as an alkaloid. More preferably, alkanols of the general formula: R-OH wherein R is alkyl with 3 to 10 carbon atoms, more preferably 3 to 8 carbon atoms, such as propanol, isopropanol, n-butanol, isobutanol, tert-butanol, n-pentanol, isopentanol, tert-pentanol, 4-methyl-2-pentanol, diethylcarbinol, diisopropylcarbinol, 2-ethylhexanol, 2,4,4-trimethylpentanol, 2,6-dimethyl-4-heptanol, linalool, 3,6- dimethyl-3-octanol, phenol, phenylmethanol, methylphenol, methylcyclohexanol or similar alcohols are used, as well as their mixtures. Component (c) can also be an aliphatic or alicyclic, saturated and unsaturated ketone of the formula OR II general R - C - ', wherein R and R' are the same or different and are each Ci-C6 hydrocarbons, which may also be cyclic, and are preferably Ci-C4 hydrocarbons. Preferred ketones have a total (R + R ') of 4 to 9 carbon atoms and include methylethyl ketone, methylpropyl ketone, diethyl ketone, methyl isobutyl ketone, 3-heptanone, 2-octanone, diisobutyl ketone, cyclohexanone, acetophenone, trime-cyclohexanone, or similar ketones, and mixtures thereof.

Component (c) can also be an aliphatic or alicyclic ether, including saturated and unsaturated ethers of the general formula ROR ", wherein R and R 'are the same or different and are each a group of Ci-Ci0 hydrocarbons. , lower dialkyl ethers (Ci ~ C6) are preferred · The total number of carbon atoms in the ether is preferable from 6 to 10. Typical ethers include methylterthamyl ether, methyl isoamyl ether, ethyl isobutyl ether, ethyltertbutyl ether , dibutyl ether, diisobutyl ether, diisoamyl ether, anisole, methylanisole, phenetol or similar ethers and mixtures thereof Component (c) may also be an aliphatic or alicyclic ester, including saturated and unsaturated esters, OR II of the general formula R- C- O- 'r wherein R and R' are the same or different. R and R 'are preferably hydrocarbon groups, more preferably alkyl groups and more preferably alkyl and phenyl having from 1 to 6 carbon atoms. Especially preferred is an ester wherein R is Ci-C4 and R 'is C4-C6. Typical esters are alkyl esters of alkanoic acids, including n-butylacetate, isobutylacetate, tert-butylacetate, isobutylpropionate, isobutyl isobutyrate, n-amylacetate, isoamylacetate, isoamylpropionate, methylbenzoate, phenylacetate, cyclohexylacetate, or similar esters, and mixtures thereof. . In general, it is preferred to employ an ester having from 5 to 8 carbon atoms. The additive (c) can simultaneously contain two oxygen-containing groups connected in the same molecule with different carbon atoms. The additive (c) can be a hydroxyketone. A preferred hydroxyketone has the general formula: H R H O O 0 ~ H wherein R is hydrocarbyl, and j is hydrogen or hydrocarbyl, preferably lower alkyl, that is (Ci-CJ) In general, it is preferred to employ a cetol having from 4 to S carbon atoms Typical hydroxyketones include l-hydroxy-2 -butanone, 3-hydroxy-2-butanone, 4-hydroxy-4-methyl-2-pentanone, or similar ketoles or a mixture thereof In yet another embodiment additive (c) is a ketone ester, preferably of the general formula: H 1 R-C-C-C-O-R li I 1! O H O wherein R is hydrocarbyl, preferably lower alkyl, that is (C 1 -C 4). Typical ketone esters include methyl acetoacetate, ethyl acetoacetate and tert-butyl acetoacetate. Preferably, such ketone esters have from 6 to 8 carbon atoms. The additive (c) can also be a heterocyclic compound containing an oxygen ring and preferably, the oxygen-containing heterocycle, which has a C4-C5 ring. More preferably, the heterocycle additive has a total of 5 to 8 carbon atoms. The additive may preferably have formula (1) or (2) as follows: R 1 2 wherein R is hydrogen or hydrocarbyl, preferably -CH 3, and R 2 is -CH 3, or -OH, or -CH 20 H, or CH 3 CO 2 CH 2 -. A typical heterocyclic additive (c) is a tetrahydrofuran alcohol, tetrahydrofurfuryl acetate, dimethyltetrahydrofuran, tetramethyl ahydrofuran, methyltetrahydropyran, 4-methyl-4-oxytetrahydropyran or similar heterocyclic additives or mixtures thereof.

Component (c) can also be a mixture of any of the above-stated components of one or more of the different types of compounds mentioned above. The suitable fuel grade ethanol (b) to be used in accordance with the present invention, can be easily identified by the person skilled in the art. A suitable example of the ethanol component is ethanol which contains 99.5% of the main substance. Any impurities included in the ethanol in an amount of at least 0.5% by volume thereof, and falling within the aforementioned definition of component (c), must be taken into account when determining the amount of component used (c) . That is, such impurities must be included in an amount of at least 0.5% ethanol in order to be taken into account as a part of component (c). Any water, if present in the ethanol, should preferably contain no more than about 0.25% by volume of the total fuel mixture, in order to meet the current standard requirements for gasoline engine fuels.

Thus, a denatured mixture of ethanol as supplied to the market, containing about 92% ethanol, hydrocarbons and by-products, can also be used as the ethanol component in the fuel composition according to the invention.

Unless otherwise indicated, all amounts are in% by volume based on the total volume of the motor fuel composition. . Generally, ethanol (b) is used in amounts from 0.1% to 20%, typically from about 1% to 20% by volume, preferably 3% to 15% by volume and more preferably from about 5 to 10% by volume . The oxygen-containing additive (c) is generally used in amounts from 0.05% up to about 15% by volume, more generally from 0.1 around 15% by volume, preferably from about 3-10% by volume and more preferably from around 5 to 10% in volume. In general, the total volume of ethanol (b) and the oxygen-containing additive (c) employed is from 0.15 to 25% by volume, usually from about 0.5 to 25% by volume, preferably from about 1 to 20% by volume. volume, more preferably from 2 to 15% by volume, and more preferably from 5 to 15% by volume. The ratio of ethanol (b) to the oxygen-containing additive (c) in the motor fuel composition is thus generally from 1: 150 to 400: 1, and is more preferably from 1:10 to 10: 1. The total oxygen content of the motor fuel composition based on the ethanol and the oxygen additive, expressed in terms of% by weight of oxygen, based on the total weight of the composition for motor fuel, is preferably not greater than about 7% by weight, more preferably not more than about 5% by weight. In accordance with a preferred embodiment of the invention, to obtain a motor fuel suitable for the operation of an internal combustion engine by ignition of standard fuel, the above component of hydrocarbon, ethanol, and the additional component containing oxygen are mixed to obtain the following properties of the resulting composition of motor fuel. -Density at 15 ° C and at a normal atmospheric pressure of not less than 690 kg / m3; -Oxygen content based on the amount of oxygen-containing components of not more than 7% w / w of the motor fuel composition. -An anti-knock index (octane number) of not less than the antiknock index (octane number) of the hydrocarbon source component and preferably for 0.5 (RON + MON) of not less than 80; -A dry vapor pressure equivalent (DVPE) essentially the same as the DVPE of the hydrocarbon source component and preferably from 20 kPa to 120 kPa; -An acid content of not more than 0.1% by weight Hac; - H from 5 to 9, - A content of aromatic hydrocarbons of not more than 40% by volume including benzene, and for benzene only not more than 1% by volume, - - limits of evaporation of liquid at a normal atmospheric pressure in% of the source volume of the motor fuel composition: initial boiling point, min 20 ° C; volume (at 70 ° C, min) of liquid 25% in evaporated volume; volume (at 100 ° C, min) of liquid 50% in evaporated volume; volume (at 150 ° C, min) of liquid 75% in evaporated volume; volume (at 190 ° C, min) of liquid 95% in evaporated volume; residues of distillation, max. 2% in volume; final boiling point 205 ° C; -sulfur content of no more than 50mg / kg; -containment of resins of no more than 2mg / 100ml. In accordance with a preferred embodiment of the method of the invention, the hydrocarbon component and the ethanol must be added together followed by the addition of an additional compound or compounds containing oxygen to the mixture. Then the resulting motor fuel composition should preferably be maintained at a temperature not lower than -35 ° C, for at least about one hour. It is a feature of this invention that the components of the motor fuel composition can be merely added to one another to form the desired composition. It is not generally required to stir or otherwise provide some important mixing to form the composition. According to a preferred embodiment of the invention, in order to obtain a motor fuel composition suitable for operating an internal combustion engine with a standard spark plug and with a minimum impact harmful to the environment, it is preferable to use the oxygen-containing components that they originate from renewable raw materials. Optionally, a component (d) can be used to further decrease the vapor pressure of the fuel mixture of components (a), (b) and (c). A single hydrocarbon selected from C3-Ci2 of aliphatic or alicyclic saturated and unsaturated hydrocarbons can be used as component (d). Preferably the hydrocarbon component (d) is selected from a Ce-Cu moiety. Suitable examples of (d) are benzene, toluene, xylene, ethylbenzene, isopropylbenzene, isopropyltoluene, diethylbenzene, isopropylxylene, tert-butylbenzene, tert-butyl toluene, tert-butylxylene, cyclooctadiene, cyclooctotetraene, limonene, isooctane, isononane, isodecane, isooctene, myrcene, alkoxyme, tert-butylcyclohexane or similar hydrocarbons and mixtures thereof. The hydrocarbon component (d) can also be a fraction that boils at 100-200oC, obtained in the distillation of crude oil, bituminous mineral carbon resin, or synthesis gas processing products. As already mentioned, the invention further relates to a mixture of additives consisting of the components (b) and (c) and, optionally also the component (d), which can be added to the hydrocarbon component (a), and it is also possible to use as such a fuel for a spark ignition modified combustion engine. The additive mixture preferably has an ratio of ethanol (b) to additive (c) from 1: 150 to 200: 1 by volume. Thus, for a preferred embodiment of the additive mixture, the mixture comprises component (c) containing oxygen in an amount from 0.5 to 99.5% by volume and ethanol (b) in an amount from 0.5 to 99.5% by volume and component (d) comprises at least one C3-C12 hydrocarbon, more preferably C8-CX1 hydrocarbon, in an amount from 0 to 99% by volume, preferably from 0 to 90%, more preferably from 0 to 79.5%, and more preferably from 5 to 77% of the additive mixture. The additive mixture preferably has an ethanol (b) ratio to the sum of the other additive components (c) + (d) from 1: 200 to 200: 1 by volume, more preferably an ethanol (b) ratio to the sum of the components (c) + (d) from 1:10 to 10: 1 in volume. The octane number of the additive mixture can be established, and the mixture used to adjust the octane number of the component (a) to a desired level by mixing a corresponding portion of the mixture (b), (c), (d) to the compound (a). The examples demonstrate the efficiency of the present invention, the following engine fuel compositions are presented which do not constitute as limiting the scope of the invention, but merely provide illustrations of some of the preferred embodiments of the invention. It will be obvious to the person skilled in the art that all combustible compositions of the following examples can of course be obtained by first preparing a mixture of additives of components (b) and (c), and optionally (d), the mixture subsequently it can be added to the component (a), or vice versa. In this case a certain amount of mixing may be required. EXAMPLES. To prepare the mixed engine fuel, the following was used as components (b), (c), and (d); - Fuel grade ethanol purchased in Sweden from Sekab and in the USA from ADM Corp. and Williams; oxygen-containing compounds, unsubstituted individual hydrocarbons and mixtures thereof purchased in Germany from Merck and in Russia from Lukoil. - Naphtha, which is a crude distillation gasoline containing saturated and unsaturated aliphatic and alicyclic hydrocarbons. The alkylated, which is a fraction of hydrocarbons consisting almost entirely of isoparaffin hydrocarbons obtained in alkylation of isobutene by butanol. The alkyl benzene which is a mixture of aromatic hydrocarbons obtained in the alkylation of benzene. Mainly the technical grade alkylbenzene comprises ethylbenzene, propylbenzene, isopropylbenzene, butylbenzene and others. All tests of the origin gasoline and of the ethanol-containing motor fuels, including those comprising the components of this invention, were carried out using the standard methods ???? at the SGS laboratory in Sweden and at Auto Research, Laboratories, Inc., USA. The driving test was carried out on a VOLVO 240 DL 1987 according to the standard method EU2000 NEDC EC 98/69. Descriptions of the European standard test 2000 (EU 2000) of the new European driving cycle (NEDC) are identical with the description of the EU / ECE standard test and the driving cycle (91/441 EEC resp ECE-R 83/01 and 93/116 EEC). These standardized tests of the European Union, include city driving cycles and extra urban driving cycles and require that specific emissions regulations be met. The analysis of the emissions of the gases of exit is carried out with a procedure of sampling to constant volume and uses a detector of ionization of flame for the determination of hydrocarbons. The 91/41 EEC Exit Gas Emission Directive (Pass I) provides specific standards for CO, (HC + NO) and (PM), while the EU fuel consumption guideline 93/116 EEC (1996) implement consumption standards. The test was carried out in a Volvo 240 DL 1987 with a 2.32 liter engine of 4 cylinders B230F (No. LG4F20-87) developing 83 k at 90 revolutions / second and a torque of 185 Nm at 46 revolutions / second.

EXAMPLE 1 Example 1 demonstrates the possibility of reducing the dry vapor pressure equivalent of the ethanol-containing motor fuel for cases when gasoline with a dry vapor pressure equivalent to ASTM is used as a hydrocarbon base. D-5191 at a level of 90 kPa (around 13 psi). To prepare the mixtures for this composition, the winter gasoline A92, A95 and A9B, which are currently sold on the market and purchased in Sweden from Shell, Statoil, Q80K and Preem, were used. Figure 1 shows the behavior of the DVPE of the motor fuel containing ethanol based on gasoline for winter A95. The motor fuels containing ethanol based on A92 and A98 for winter used in this example also show similar behavior. The gasoline of origin comprised C4-C12 hydrocarbons, aliphatic and alicyclic including saturated and unsaturated. The A92 winter gasoline used had the following specification: DVPE = 89.0 kPa Anti-knock index 0.5 (RON + MON) = 87.7 Fuel 1-1 (not according to the invention) contained A92 winter gasoline and ethanol and had the following properties for different ethanol contents: A92: Ethanol = 95 -. 5% by volume DVPE = 94.4 kPa 0.5 (RON + MON) = 89.1 A92: Ethanol = 90: 10% by volume DVPE = 94.0 KPa 0.5 (RON + MON) = 90.2 The following different modes of fuels 1-2 and 1 -3 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of motor fuel containing ethanol based on winter gas A92. The fuel of the invention 1-2 contained winter gasoline A92 (a) ethanol, (b) oxygen containing additives (c) and had the following properties for various compositions: A92: Ethanol: Isobutyl acetate = 88.5: 4.5: 7 % in volume DVPE = 89.0 kPa 0.5 (RON + MON) = 89.9 A92: Ethanol: Isoamyl acetate = 88: 5: 7% by volume DVPE = 88.6 kPa 0.5 (RON + MON) = 89.0 A92: Ethanol: Diacetone alcohol = 88.5: 4.5: 7% by volume DVPE = 89.0 kPa 0.5 (RON + MON) = 89.65 A92: Ethanol: Etylacetoacetate = 90.5: 2.5: 7% by volume DVPE = 89.0 kPa 0.5 (RON + MON) = 87.8 A92: Ethanol : Isoamylpropionate = 87.5: 5.5: 7% by volume DVPE = 88.7 kPa 0.5 (RON + MON) = 90.4 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel induced by the presence of ethanol at the level of the DVPE of the gasoline of origin. In some cases, it is only sufficient to enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 90 kPa, A92: Ethanol: 3-Heptanone = 85: 7.5: 7.5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 89.9 A92: Ethanol: 2,6-drmethyl - -heptanol = 85: 8.5: 6.5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 90.3 A92: Ethanol: Diisobutyl ketone = 85: 7.5: 7.5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 90.25 The fuel of the invention 1-3 contained winter gasoline A92 (a), ethanol (b), additives containing oxygen (c) and C6-C12 hydrocarbons (d), and had the following properties for the various compositions: A92 : Ethanol: Isoamyl alcohol: Alkylated = 79: 9: 2: 10% by volume The boiling temperature of the alkylate is 100-130 ° C DVPE = 88.5 kPa 0.5 (RON + MON) = 90.25 A92: Ethanol: Isobutyl acetate: Naphtha = 80: 5: 5: 10% in volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 88.7 kPa 0.5 (RON + MON) = | 88.6 A92: Ethanol: Tert-butanol: Naphtha = 81: 5: 5: 9% by volume The temperature of boiling point for naphtha is 100- .200"C DVPE = 87.5 kPa 0.5 (RON + MON) = 89.6 The engine fuel compositions below show that it is not always necessary to reduce the DVPE in excess of engine fuel induced by the presence of ethanol at the level of the DVPE of the gasoline of origin In some cases, it is sufficient only to enforce the requirements of the provisions in force for the corresponding gasoline The level of DVPE for winter gasoline is 90 kPa A92: Ethanol: Alcohol of isoamyl: Benzene: Ethylbenzene: Diethylbenzene = 82.5: 9.5: 0.5: 0.5 : 3 -. 4% by volume DVPE = 90 kPa 0.5 (RON + MON) = 91.0 A92: Ethanol: Isobutyl acetate: Toluene = 82.5: 9. 5: 0.5: 7.5% by volume DVPE = 90 kPa 0.5 (RON + MON) = 90.8 A92: Ethanol: Isobutanol: Isoamyl alcohol: m-xylene = 82.5: 9.2: 0.2: 0.6: 7.5% by volume DVPE = 90 kPa 0.5 (RON + MON) = 90.9 The following compositions 1-5 to 1-6 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the motor fuel containing ethanol based on winter gasoline A98. Gasoline for winter A98 has the following specification: DVPE = 89.5 kPa anti-knock index 0.5 (RON + MON) = 92.35 Comparative fuel 1-4 containing gasoline for winter A98 and ethanol and had the following properties for the various Compositions: A98: Ethanol = 95: 5% by volume DVPE = 95.0 kPa 0.5 (RON + MON) = 92.85 A98: Ethanol = 90: 10% by volume DVPE = 94.5 kPa 0.5 (RON + MON) = 93.1 Fuel 1- 5 contained gasoline for winter A98 (a), ethanol (b), and oxygen-containing additives (c) and had the following compositions for various compositions: A98: Ethanol: Isobutanol = 84: 9: 7% by volume DVPE = 88.5 kPa 0.5 (RON + MON) = 93.0 A98: Ethanol: Ter-butylacetate = 84: 9 ·. 7% by volume DVPE = 89.5 kPa. 0.5 (RON + MON) = 93.3 A98: Ethanol: Benzyl alcohol = 85: 7.5: 7.5% by volume DVPE = 89.5 kPa 0.5 (RON + MON) = 93.05 A98: Ethanol: Cyclohexanone = 85: 7.5: 7.5% by volume DVPE - 88.0 kPa 0.5 (RON + MON) = 92.9 A98: Ethanol: Diethyl ketone = 85: 7.5: 7.5% by volume DVPE = 89.0 kPa 0.5 (RON + MON) = 92.85 A98: Ethanol: Methylpropyl ketone = 85: 7.5: 7.5% by volume DVPE = 89.5 JPa 0.5 (RON + MON) = 93.0 A98: Ethanol: Methyl isobutyl ketone = 85: 7.5: 7.5% by volume DVPE = 89.0 kPa 0.5 (RON + MON) = 92.65 A98: Ethanol: 3-heptanone = 85: 7.5: 7.5% in volume DVPE = 89.5 kPa 0.5 (RON + MON) = 92.0 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the motor fuel caused by the presence of ethanol DVPE level of the origin gasoline. In some cases, it is only sufficient to enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 90 kPa. A98 ·. Ethanol: Methyl isobutyl ketone = 85: 8: 7% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 92.7 A98: Ethanol: Cyclohexanone = 85: 8.5: 6.5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 93.0 A98: Ethanol -. Methylphenol = 85: 8 -. 7% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 93.05 Fuel 1-6 contained winter gas A98 (a), ethanol (b), oxygen-containing additives (c), and hydrocarbons 3- i2 (d) ) and had the following properties for the various compositions: A98: Ethanol: Isoamyl alcohol: Isooctane = 80: : 5: 10% by volume DVPE = 82.0 kPa 0.5 (RON + MON) = 93.2 A98: Ethanol: Isoamyl alcohol: m-isopropyl toluene = 78.2: 6.1: 6.1: 9.6% by volume DVPE = 81.0 kPa 0.5 (RON + MON) = 93-8 A98: Ethanol: Isobutanol: Naphtha = 80: 5: 5; 10% by volume The boiling point of naphtha is 100-200 ° C DVPE = 82.5 kPa 0.5 (RON + MON) = 92.35 A98: Ethanol: Isobutanol: Naphtha: m-isopropyl toluene = 80: 5: 5: 5: 5% by volume The boiling point of naphtha is 100-200 ° C DVPE = 82.0 kPa 0.5 (RON + MON) = 93.25 A98: Ethanol: Tert-butyl acetate: Naphtha = 83: 5: 5: 7¾ by volume boiling point of naphtha is 100-200 ° C DVPE = 82.1 kPa 0.5 (RON + MON) = 92.5 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel caused by the presence of ethanol at the level of the DVPE of the gasoline of origin. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 90 kPa. A98: Ethanol: Isoamyl alcohol: Isooctane = 85 -. : 5: 5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 93.3 A98: Ethanol: Isobutanol: Naphtha = 80: 5: 5: 5% by volume The boiling point of naphtha is 100-200 ° C DVPE = 90.0 kPa 0.5 (RON + MON) = 93.0 A98: Ethanol: Isobutanol: Isopropyl xylene = 85: 9. 5: 0.5: 5% by volume DVPE = 90 kPa 0.5 (RON + MON) = 93.1 The engine fuel compositions below show that it may be necessary to reduce the DVPE in excess of the engine fuel, caused by the presence of ethanol below the DVPE level of the origin gasoline. Normally, this is required when the DVPE of the gasoline of origin is higher than the limits of the regulations in force for the corresponding gasoline. In this way, for example, it is possible to transform winter grade gasoline into summer grade gasoline. The DVPE level for summer gasoline is 70 kPa. A98: Ethanol: Isobutanol: Isooctane: Naphtha = 60: 9.5: 0.5: 15: 15% by volume The boiling point of naphtha is 100-200 ° C DVPE = 7 'kPa 0.5 (RON + MON) = 92.85 A98: Ethanol: Isobutanol: Alkylated: Naphtha = 60: 9.5: 0.5: 15: 15% by volume The boiling point of naphtha is 100-200 ° C The boiling point of the alkylate is 100-130 ° C DVPE = 70 kPa 0.5 ÍRON + MON) = 92. S A98: Ethanol: Tert-butyl acetate: Naphtha = 60: 9: 3: 28% by volume The boiling point of naphtha is 100-200 ° C DVPE = 70 kPa 0.5 (RON + MON) = 91.4 The following fuels 1-8, 1-9 and 1-10 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the motor fuel containing ethanol based on winter gasoline A95. The A95 winter gasoline contains the following specification: DVPE = 89.5 kPa anti-knock index 0.5 (RON + MON) = 90.1 The test of conformity with the standard test method EU 2000 NEDC EC 98/69 as described above showed the following results: CO (carbon monoxide) 2.13g / km, HC (hydrocarbons) 0.280g / km; NOx (nitrogen oxide) 0.265g / Km; C02 (carbon dioxide) 227.0g / km, - NMHC * 0.276g / km; Fuel consumption, Fcl / l00km 9.84 hydrocarbons that are not methane. Comparative fuel 1-7 contained A95 winter gasoline and ethanol, and had the following properties for the various compositions: A95: Ethanol = 95: 5% by volume DVPE = 94.9 kPa 0.5 (RON + MON) = 91.6 A95: Ethanol = 90: 10% by volume (preferred as RF 1 below) DVPE = 9 .5 kPa 0.5 (RON + ON) = 92.4 The test of the reference fuel mixture (RFM1) shows the following results compared to winter gas A95: CO -15% HC -7.3% NO + 15.5% C02 + 2.4% NMHC * -0.5% Fuel consumption, Fcl / 100km + 4.7% "-" represents a reduction in the issuance, while "+" represents an increase in the issuance. The fuel of the invention 1-8 contained winter gasoline A95 (a), ethanol (b) and the additives containing oxygen (c), and had the following properties for the various compositions: A95: Ethanol: Diisoamyl ether = 86 : 8: 6% by volume DVPE = 87.5 kPa 0.5 (RON + MON) = 90.6 A95: Ethanol: Isobutyl acetate = 88: 5: 7% by volume DVPE = 87.5 kPa 0.5 (RON + MON) = 91.85 A95: Ethanol : Isoamylpropionate = 88: 5: 7% by volume DVPE = 87.0 kPa 0.5 (RON + MON) = 91.35 A95: Ethanol: Isoaralylacetate = 88: 5: 7% by volume DVPE = 87.5 kPa 0.5 (RON + MON) = 91.25 A95: Ethanol: 2-octanone = 88: 5: 7% by volume DVPE = 87.0 kPa 0.5 (RON + MON) = 90.5 A95: Ethanol: Tetrahydrofurphyl alcohol = 88 : 5 : 7% by volume DVPE = 87.5 kPa 0.5 (RON + MON) = 90.6 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel caused by the presence of ethanol at the DVPE level of the origin gasoline. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 90, kPa.

A95: Ethanol: Diisoamyl ether = 87: 9: 4% by volume DVPE = 90.0 kPa 0.5 (ON + MON) = 91.0 A95: Ethanol: Isoamyl acetate = 88: 7: 5% by volume DVPE = 90.0 kPa 0.5 ( RON + MON) = 91.3 A95: Ethanol: Tetrahydrofurphyl alcohol = 88: 7: 5% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 90.8 Fuel 1-9 contained gasoline for winter A95 (a), ethanol (b), additives containing oxygen (c), and hydrocarbons Ce-C12 (d) and had the following properties for the various compositions: A95: Ethanol -. Isoamyl alcohol: Alkylated = 83.7: 5: 2: 9.3% by volume The boiling temperature of the alkylate is 100-130 ° C DVPE = 88.0 kPa 0.5 (RON + MON) = 91.65 A95: Ethanol: Isoamyl alcohol: Naphtha = 83.7: 5 -. 2: 9.3% by volume The boiling point of naphtha is 100-200 ° C DVPE = 88.5 kPa 0.5 (RON-t-MON) = 90.8 A95: Ethanol: Isobutyl acetate: Alkylated = 81: 5: 5: 9 % by volume The boiling temperature of the alkylate is 100-130 ° C DVPE = 87.0 kPa 0.5 (RON + MON) = 92.0 A95: Ethanol: Isobutyl acetate: Naphtha = 81: 5: 5: 9% by volume The temperature of boiling of naphtha is 100-200 ° C DVPE = 87.5 kPa 0.5 (RON + ON) = 91.1 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the motor fuel caused by the presence of ethanol at the DVPE level of the original gasoline. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 90 kPa. A95: Ethanol: Isoamyl alcohol: Xylene = 80: 9.5 : 0.5: 10% by volume DVPE = 90.0 kPa 0.5 (RON + MON) = 92.1 A95: Ethanol: Isobutanol: Isoamyl alcohol: Naphtha = 80: 9.2: 0.2: 0.6% by volume The boiling point of naphtha is 100 -200 ° C DVPE = 90.0 kPa 0.5 (RON + MON) = 91.0 A95: Ethanol: Isobutanol: Isoamyl alcohol: Naphtha: Alkylated = 80: 9.2: 0.2: 0.6: 5: 5% by volume The boiling temperature of the Naphtha is 100 ~ 200 ° C The boiling temperature of the alkylate is 100-130 ° C DVPE = 90.0 kPa 0.5 (RON + MON) = 91.6 The engine fuel compositions below show that it may be necessary to reduce the DVPE in excess of the motor fuel, caused by the presence of ethanol below the DVPE level of the gasoline of origin. Normally, this is required when the DVPE of the gasoline of origin is higher than the limits of the regulations in force for the corresponding gasoline. In this way, for example, it is possible to transform winter grade gasoline into summer grade gasoline. The DVPE level for summer gasoline is 70 kPa A95: Ethanol: Isobutanol: Isoamyl alcohol: Naphtha: Isooctane = 60: 9.2: 0.2: 0.6 -. 15: 15% by volume The boiling temperature of naphtha is 100-200 ° C DVPE = 70.0 kPa 0.5 (RON + MON) = 91.8 A35: Ethanol: Tert-butyl acetate: Naphtha = 60: 9: 1: 30 % by volume The boiling temperature of naphtha is 100-200 ° C DVPE = 70.0 kPa 0.5 (ON + MON) = 90.4 Fuel 1-10 contains 75% by volume of winter gasoline A95, 9.6% by volume of ethanol , 0.4% by volume of isobutyl alcohol, 4.5% by volume of -isopropyl of toluene and 10.5% by volume of naphtha with a boiling point of 100-200 ° C. This fuel formulation demonstrates the possibility of lowering the DVPE, increasing the octane number, decreasing the level of toxic emissions in the exhaust gases and decreasing the fuel consumption compared to the reference mixture of gasoline and ethanol (RF 1) . The composition of motor fuel has the following properties: Density at 15 ° C, according to ASTM D 4052 749.2 kg / m3; Initial boiling point, according to ASTM D 8629 ° C; Vaporizable portion - 70 ° C 47.6% by volume; Vaporizable portion - 100 ° C 47.6% by volume; Vaporizable portion - 150 ° C 47.6% by volume; Vaporizable portion - 180 ° C 47.6% by volume; Boiling end point 194.9 ° C; Residue by evaporation 1.3 in volume; Loss by evaporation 1.6 in volume; Oxygen content, according to ASTM D4815 3.7% w / w; Acidity, according to ASTM D1613 percent in Weight of Hac 0.004; pH, according to ASTM D1287 6.6; Sulfur content, according to ASTM D 5453 18mg / kg; Gum content, according to ASTM D381 1 mg / 100ml; Water content, according to ASTM D6304 0.03% p / p; Aromatics, according to SS 155120, including Benzene 30.2% by volume; Benzene only, according to EN 238 0.7% in '' volume; DVPE, according to ASTM D 5191 89.0kPa; anti-knock index 0.5 (RON + MON), according to ASTM D 2699-86 and ASTM D 2700-86 92.6 The fuel formulation for engine 1-10 was tested in accordance with the standard test method EU 2000 NEDC EC 98/69 and the following results were obtained in comparison with the A95 winter gasoline: CO -21% HC -9% NO + 12.8% C02 + 2.38% NMHC * -6.4% Fuel consumption, Fcl / 100km + 3.2% Fuel formulations 1-1 to 1-10 show a reduced DVPE on fuel for Tested motor containing ethanol based on summer grade gasoline. Similar results were obtained when other oxygen-containing compounds of this invention are substituted by the additives of Examples 1-1 to 1-10. To prepare the above fuel formulations 1-1 to 1-10 of this motor fuel composition, the gasoline was initially mixed with ethanol, and the corresponding oxygen-containing additive was added to the fuel mixture. The obtained motor fuel composition was then allowed to stand before testing between 1 and 24 hours at a temperature of not less than -35 ° C. All the above formulations were prepared without the use of any mixing device. The possibility of using a mixture of additive additives containing oxygen other than ethanol (c) and ethanol (b) was established to formulate the motor compositions containing ethanol for standard internal combustion spark ignition engines, which meet the requirements standard for gasoline, referring to vapor pressure and anti-knock stability. The fuel compositions below demonstrate such a possibility. A sample comprising 50% ethanol and 50% isoamyl alcohol was in different proportions mixed with winter grade gasolines, the equivalent dry vapor pressure (DVPE) of which does not exceed 90 kPa. All the resulting mixtures had the DVPE not higher than that required by the regulations for winter gasoline, nominally 90 kPa. A92: Ethanol: Isoamyl alcohol = 87: 6.5: 6.5% by volume DVPE = 89.0 kPa 0.5 (RON + MON) = 90.15 A95: Ethanol: Isoamyl alcohol = 86: 7.0: 7.0% by volume DVPE = 89.3 kPa 0.5 ( RON + MON) - 92.5 A98: Ethanol: Isoamyl alcohol = 85; 7.5: 7.5% by volume DVPE = 86.5 kPa 0.5 (RON + MON) = .92.9 Figure 2 shows the behavior of the dry vapor pressure equivalent (DVPE) as a function of the ethanol content when mixing the additive mixture 2 comprising 33.3% ethanol and 66.7% tert-pentanol with winter A95 gasoline. Figure 2 shows that by varying the content of ethanol in gasoline in the range from 0 to 11%, does not induce an increase in vapor pressure for these compositions, higher than the requirements of the standards for gasoline grade DVPE winter which is 90 kPa. A similar behavior of DVPE was observed for winter gasoline A92 and A98 mixed with a mixture of additives comprising 33.3% by volume of ethanol and 66.7% by volume of tert-pentanol. The effect of the vapor pressure reduction of ethanol-containing gasolines while increasing the ethanol content in the resulting composition from 0 to 11% by volume was also observed when part of the oxygen-containing additive was replaced by C3-hydrocarbons. Ci2 (component (d)). The compositions below demonstrate the effect achieved by means of the invention. A mixture of additives comprising 40% by volume of ethanol, 10% by volume of isobutanol and 50% by volume of isopropyltoluene was mixed with winter gasoline with a DVPE not higher than 90 kPa. The various compositions obtained had the following properties. A92: Ethanol: Isobutanol: isopropyltoluene = 85: 6: 1.5: 7.5% by volume DVPE = 84.9 kPa 0.5 (RON + MON) = 93.9 A95: Ethanol: Isobutanol: isopropyltoluene = 80: 8: 2: 10% by volume DVPE = 84.9 kPa 0.5 (RON + MON ) = 93.9 A98: Ethanol: Isobutanol: isopropyltoluene = 86: 5.6: 1.4: 7% by volume DVPE = 85.5 kPa 0.5 (RON + MON) = 93.8 Similar results were obtained when other compounds containing oxygen and also C6-Ci2 hydrocarbons of the present invention were used in the inventive ratio to prepare the additive mixture which was then used for the preparation of gasolines containing ethanol. These gasolines fully meet the requirements for motor fuels used in standard spark ignition engines. EXAMPLE 2 Example 2 demonstrates the possibility of reducing the dry vapor pressure equivalent of motor fuel containing ethanol, for cases when gasolines with a dry vapor pressure equivalent in accordance with ASTM D-5191 at a level of 70 kPa (around 10 psi) are used as a hydrocarbon base. In order to prepare the mixtures of this composition, summer A95, A95 and A98 gasolines which are currently sold on the market and purchased in Sweden from Shell, Statoil, Q80k and Preem were used, the original gasoline comprising C4 hydrocarbons. C12 aliphatic and alicyclic including saturated and unsaturated Figure 1 shows the behavior of the DVPE of motor fuel containing ethanol based on gasoline for summer A95 Motor fuels containing ethanol based on gasoline for winter A92 and A98 respectively, demonstrated a similar behavior The following fuels 2-2 and 2-3 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the motor fuel containing ethanol based on the summer A92 gasoline. Summer A92 gasoline had the following properties: DVPE = 70.0 kPa Anti-knock index 0.5 (RON + MON) = 87.5 Comparative fuel 2-1 contained gasoline to see A92 and ethanol, and had the following properties for the various compositions: A92: Ethanol = 95: 5% by volume DVPE = 77.0 kPa 0.5 (RON + MON) = 89.3 A92: Ethanol = 90: 10% by volume DVPE = 76.5 kPa 0.5 (RON + MON) = 90.5 Fuel 2-2 contained summer gasoline A92 (a), ethanol (b), and additives containing oxygen (c) and had the following properties for the various compositions: A92: Ethanol : Isoamyl alcohol = 85: 6.5: 6.5% by volume DVPE = 69.8 kPa 0.5 (RON + MON) - 90.3 A92: Ethanol: Isobutanol = 80: 10: 10% by volume DVPE = 67.5 kPa 0.5 (RON + MON) = 90.8 A92: Ethanol: Diethylcarbinol = 85: 6.5: 6.5% by volume DVPE = 69.6 kPa 0.5 (RON + MON) = 90.5 A92: Ethanol: Diisobutyl ketone = 85.5: 7.5: 7% by volume DVPE = 69.0 kPa 0.5 (RON + MON) = 90.0 A92: Ethanol: Diisobutyl ether = 85: 8: 7% by volume DVPE = 68.9 kPa 0.5 (RON + MON) = 90.1 A92: Ethanol: Di-n-butyl ester = B5: 8: 7% in volume DVPE = 68.5 kPa 0.5 (RON + MON) = 88.5 A92: Ethanol: Isobutylacetate = 88: 5: 7% by volume DVPE = 69.5 kPa 0.5 (RON + MON) = 89.5 The engine fuel compositions below show that it is not always It is necessary to reduce the excess DVPE of the motor fuel caused by the presence of ethanol at the DVPE level of the original gasoline. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 70 kPa.

A92: Ethanol: Isobutanol = 87.5: 10: 7.5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 90.6 A92: Ethanol: Di-n-butyl ester = 85: 9: 6% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 89.2 A92: Ethanol: Diisobutyl ketone = 85: 8: 7% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 90.04 Fuel 2-3 contained summer gasoline A92 (a), ethanol (b) the additives containing oxygen (c), and C6-Ci2 (d) hydrocarbons and had the following properties for the various compositions: A92: Ethanol: Methylethyl ketone: Isooctane = 80: 9.5: 0.5: 10% by volume DVPE = 69.0 kPa 0.5 (RON + MON) = 91.0 A92: Ethanol: Isobutanol: Isooctane = 80: 9.5: 0.5: 10% by volume DVPE = 69.0 kPa 0.5 (RON + MON) = 91.1 A92: Ethanol: Isobutanol: Isononan = 80 : 9.5: 0.5: 10% by volume DVPE = 68.8 kPa 0.5 (RON + MON) = 91.0 A92: Ethanol: Isobutanol: Isodecano = 80: 9.5: 0.5 : 10% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 90.8 A92: Ethanol: Isobutanol: Isooctane = 80: 9.5: 0.5: 10% by volume DVPE = 68.9 kPa 0.5 (RON + MON) = 91.2 A92: Ethanol : Isobutanol: Toluene = 80: 9.5: 0.5: 10% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 91.4 A92: Ethanol: Isobutanol: Naphtha = 80: 9.5: 0.5: 10% by volume The boiling temperature of the naphtha is 100-200 ° C DVPE = 67.5 kPa 0.5 (RON + MON) = 90.4 A92: Ethanol: Isobutanol: Naphtha: Toluene = 80: 9.5: 0.5: 5: 5% by volume The boiling point of naphtha is 100-200 ° C DVPE = 67.5 kPa 0.5 (RON + MON) = 90.9 A92: Ethanol: Isobutanol: Naphtha: Isopropyl toluene = 80: 9.5: 0.5: 5: 5% by volume The boiling point of naphtha is 100-200 ° C DVPE - 67.5 kPa 0.5 (RON + MON) = 91.2 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel caused by the presence of ethanol at the DVPE level of the gasoline of origin . In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 70 kPa. A92: Ethanol: Isobutanol: Isodecane = 82.5: 9.5: 0. 5: 7.5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 90.85 A92: Ethanol: Isobutanol: Tert -butylbenzene = 82.5: 9. 5: 0.5: 7.5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 91.5 A92: Ethanol: Isobutanol: Isoamyl alcohol: Naphtha: Tert-butyltoluene = 82.5: 9.2: 0.2: 0.6 ·. 5 : 2.5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 91.1 The following fuels 2-5 and 2-6 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the motor fuel containing ethanol based on gasoline for summer A98. Gasoline for summer A98 had the following specification: DVPE = 69.5 kPa Anti-knock index 0.5 (RON + MON) = 92.5 Comparative fuel 2-4 contained summer gasoline A98 and ethanol, and had the following properties for the various compositions: A98: Ethanol: = 95.5% by volume DVPE = 76.5 kPa 0.5 (RON + MON) = 93.3 A98 -. Ethanol: = 90: 10% by volume DVPE = 76.0 kPa 0.5 (RON + MON) = 93.7 Fuel 2-5 contained summer A98 gasoline (a), ethanol (b) and the additives containing oxygen (c), and had the following properties for the various compositions: A98: Ethanol: Isobutanol = 85: 7.5: 7.5% by volume DVPE = 69.5 kPa O .5 ( RON + MON) = 93.5 A98: Ethanol: Diisobutyl ketone = 83: 9.5: 7.5% by volume DVPE = 69.0 kPa 0.5 (RON + MON) = 93.9 A98: Ethanol: Isobutyl acetate = 88: 5: 7% by volume DVPE = 69.5 kPa 0.5 (RON + MON) = 93.4 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel caused by the presence of ethanol at the DVPE level of the gasoline of origin. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 70 kPa. A98: Ethanol: Isobutanol = 85: 8: 7% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 93.7 A98: Ethanol: Tert-pentanol = 90: 5: 5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 93.8 Fuel 2-6 contained summer gasoline A9B (a) ethanol (b), the additives containing oxygen (c), and hydrocarbons C3-Ci2 (d) and had Xas following properties of the various compositions: A98: Ethanol: Isobutanol: Isooctane = 80: 9.5 -. 0.5 : 10% by volume DVPE = 69.0 kPa 0.5 (RON + MON) = 93.7 A98: Ethanol: Isopropanol: Alkylbenzene = 80: 5: : 10% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 94.0 The engine fuel compositions below show that it is not always necessary to reduce the excess DVPE of the engine fuel caused by the presence of ethane at the DVPE level of the origin gasoline. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 70 kPa. A98: Ethanol: Isobutanol: Isooctane = 81.5: 9.5: 0.5: 8.5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 93.5 A98: Ethanol: Tert-butanol: Limonene = 86: 7 ·. Four ·. 4% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 93.5 The following fuels 2-8 to 2-10 demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the fuel containing ethanol based on Summer A95 gasoline. Summer A95 gasoline contains the following specification: DVPE = 68.5 kPa Anti-knock index 0.5 (RON + MON) = 89.8 The test carried out as above, shows that summer A95 gasoline has the following results: CO (monoxide) carbon) 2,198g / km, HC (hydrocarbons) 0.245g / km; NO (nitrogen oxide) 0.252g / Km; C02 (carbon dioxide) 230.0g / km; N HC * 0.238g / km; Fuel consumption, Fcl / lOOkm 9.95 * Hydrocarbons that are not methane. Comparative fuel 2-7 contains the summer A95 gasoline and ethanol, and has the following properties for the various compositions A95: Ethanol = 95%: 5% by volume DVPE = 75.5 kPa 0.5 (RON + MON) = 90.9 A95: Ethanol = 90%: 10% by volume (also referred to below as RF 2) DVPE = 75.0 kPa 0.5 (RON + MON) = 92.25 The fuel test of the mixture (RFM 2) demonstrates the following results compared to gasoline summer A95: CO -9.1% HC -4.5% NOx + 7.3% C02 + 4.0% NMHC * -4.4% Fuel consumption, Fcl / 100km + 3.6% represents a reduction in the emission, while "+" represents an increase in the emission The fuel 2-8 that contains summer A95 gasoline and additives that contain oxygen and has the following properties for the various properties: A95: Ethanol: Isoamyl alcohol = 85: 7.5: 7.5% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 92.2 A95: Ethanol: Diisoamyl ether ~ 86: 8: 6% by volume DVPE = 66.5 kPa 0.5 (RON + MON) = 90.2 A95: Ethanol: Isobutylacetate = 88: 5: 7% by volume DVPE = 67.0 kPa 0.5 (RON + MON) = 92.0 A95: Ethanol: Tert-butanol = 88: 5: 7% by volume DVPE = 68.4 kPa 0.5 (RON + MON) = 92.6 A95: Ethanol: Tert-pentanol = 90: 5: 5% by volume DVPE = 68.5 kPa 0.5 (RON +. MON) = 92.2 A95: Ethanol -. Isopropanol = 80: 10: 10% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 92.8 A95: Ethanol: 4-methyl-2-pentanol = 85: 8: 7% by volume DVPE = 66.0 kPa 0.5 (RON + MON) = 91.0 A95: Ethanol: Diethyl ketone = 85 ': 8: 7¾ by volume DVPE = 68.0 kPa 0.5 (RON + MON) = 92.2 A95: Ethanol: Trimethylcyclohexanone = 85: 8: 7% by volume DVPE = 67.0 kPa 0.5 (RON + MON) = 91.8 A95: Ethanol: Methyltertyl ether = 80: 8: 12% by volume DVPE = 68.0 kPa O .5 (RON + MON) = 93.8 A95: Ethanol: n-Butylacetate = 87: 6.5 ·. 6.5% by volume DVPE = 68.0 kPa 0.5 (RON + MON) = 90.1 A95: Ethanol: Isobutyl isobutyrate = 90: 5: 5% by volume DVPE = S8.5 kPa 0.5 (RON + MON) = 90.0 A95: Ethanol Methylacetoacetate = 85 : 7: 8% by volume DVPE = 68.5 kPa 0.5 (RON + MON) = 89.9 The engine fuel compositions below, show that it is not always necessary to reduce the excess DVPE of the motor fuel caused by the presence of ethanol at the level of the DVPE of the gasoline of origin. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for winter gasoline is 70 kPa. A95: Ethanol: 4-methyl-2-pentanol = 85: 10: 5% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 91.6 A95: Ethanol: Isobutyl isobutyrate = 90; 6: 4% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 90.5 Fuel 2-9 containing summer gasoline A95 (a), ethanol (b), oxygen-containing additives (c), and hydrocarbons C6-C12 (d) and has the following properties for the various compositions: A95: Ethanol: Ter-pentanol: Alkylbenzene = 80; 7 : 4: 9% by volume DVPE = 67.5 kPa 0.5 (RON + MON) = 93.6 A95: Ethanol: tert-butanol: Alkylbenzene = 80: 7: 4: 9% by volume DVPE = 68.0 kPa 0.5 (RON + MON) = 93.8 A95: Ethanol: Propanol; Xylene = 80: 9.5: 0.5 .- 10% by volume DVPE = 68.0 kPa 0.5 (RON + MON) = 93.1 A95: Ethanol: Diethyl ketone: Xylene = 80: 9.5: 0.5: 10% by volume DVPE = 68.0 kPa 0.5 (RON + MON) = 93.2 A95: Ethanol: Isobutanol: Naphtha: Isopropyl toluene = 80: 9. 5: 0.5: 5: 5% by volume The boiling temperature for naphtha is 100- 170 ° C DVPE = 68.0 kPa 0.5 (RON + MON) = 92.4 A95: Ethanol: IsobuCanol: Naphtha: Alkylated = 80: 9.5: 0.5 : 5: 5% by volume The boiling temperature for naphtha is 100- 170 ° C The boiling temperature for alkylation is 100-130 ° C DVPE = 68.5 kPa 0.5 (RON + MON) = 92.2 Fuel compositions for Then, they show that it is not always necessary to reduce the DVPE in excess of the motor fuel, caused by the presence of ethanol at the level of the DVPE of the original gasoline. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for summer gasoline is 70 kPa. A95-. Ethanol: Isobutanol: Isoamyl alcohol: Xylene = 82. 5: 9.2: 0.2: 0.6: 7.5% by volume DVPE = 70.0 KPa 0.5 (RON + MON) = 93.0 A95: Ethanol: Isobutanol: Isoamyl alcohol: Cyclooctadiene = 82.5: 9.2: 0.2: 0.6: 7.5 by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 92.1 Fuel formulation 2-10 contains 81.5 by volume of summer A95 gas, 8.5% by volume of m-isopropyltoluene 9.2% by volume of ethanol, and 0.8% by volume of isoamyl alcohol. Formulation 2-10 was tested to demonstrate how the composition of the invention maintains the dry vapor pressure equivalent at the same level as the original gasoline, while increasing the octane number, while decreasing the toxic emission level in the exhaust gases and the fuel consumption is reduced compared to the RFM 2 mixture of gasoline and ethanol. Formulation 2-10 has the following specific properties: density at 15 ° C, according to ASTM D4052 754. Ikg / m3; Initial boiling point, according to ASTM D 86 26.6 ° C Vaporizable portion -70 ° C 45.2% by volume Vaporizable portion -100 ° C 56.4% by volume Vaporizable portion -150 ° C 88.8% by volume Vaporizable portion -180 ° C 97.6% by volume Boiling point 186.3 ° C; Evaporation residue 1.6% by volume Evaporation loss 0.1% by volume Oxygen content according to ASTM D4815 3.56% w / w acidity, according to ASTM D1613% by weight Hac O.00 pH, according to ASTM D1287 8.9; Sulfur content according to ASTM D5453 16 mg / kg; gum content ASTM D381 < lmg / 100 m; water content, according to ASTM D6304 0.12% in w / w; aromatics according to SS 155120, including benzene 30.1% by volume; benzene only, according to EN 238 0.8% by volume; DVPE according to, ASTM D 5191 68.5 kPa; anti-knock index 0.5 (RON + MON), according to ASTM D 2699-86 and ASTM D 2700-86 92.7 The fuel formulation for engine 2-10 was tested in accordance with the test method EU 2000 NEDC EC 98/69 as above, and gave the following results in comparison (+) or (-)% with summer gasoline results of origin A95: CO -0.18% HC -8.5% NOx + 5.3% C02 + 2.8% NMHC -9% Fuel consumption, Fe, 1-100 km + 3.1% Fuel formulations 2-1 to 2-10 show a reduced DVPE on proven ethanol-containing motor fuels, based on summer-grade gasoline. Similar results were obtained when other oxygen-containing additives of the invention are replaced by the additives of Examples 2-1 to 2-10. To prepare all of the above fuel formulations from 2-1 to 2-10 of this motor fuel composition, gasoline is initially mixed with ethanol, a mixture to which the corresponding additive containing oxygen was then added. The obtained motor fuel composition was then allowed to stand before being tested between 1 and 24 hours at a temperature not lower than -35 ° C. All the above formulations were prepared without the use of any mixing device. The use of a mixture of additives comprising ethanol and oxygen-containing compounds other than ethanol for the preparation of gasolines containing ethanol, was carried out with summer grade gasolines. The below combustible compositions demonstrate the possibility of obtaining gasolines containing ethanol, to meet the standard requirements for summer-grade gasolines, including vapor pressure not exceeding 70 kPa. Figure 2 shows the behavior of a dry vapor pressure equivalent (DVPE) as a function of the ethanol content, when mixing summer gas A95 with the additive mixture 3 comprising 35% by volume of ethanol, 5% in volume of isoamyl alcohol and 60% in volume of naphtha whose boiling is at temperatures between 100-170 ° C. Figure 2 shows that by varying the content of ethanol in gasoline within the range from 0 to 20%, does not induce an increase in vapor pressure for these compositions higher than the requirements of the standards for DVPE of summer grade gasolines, which is 70 kPa.

A similar behavior of DVPE is observed for summer A92 and A98 gasoline mixed with a mixture of additives comprising 35% by volume of ethanol, 5% by volume of isoamyl alcohol and 60% by volume of naphtha whose boiling is at 100 -170 ° C. The ratio between ethanol and the oxygen-containing compound, other than ethanol in the additive mixture, which is used for the preparation of gasolines containing ethanol, is of substantial importance. The ratio between the components of the additive established by the present invention makes it possible to adjust the vapor pressure of gasolines containing ethanol in a wide range. The compositions below show the possibility of using mixtures of additives with a high and low content of ethanol. A mixture of additives comprising 92% by volume of ethanol, 6% by volume of isoamyl alcohol and 2% by volume of isobutanol, is mixed with summer-grade gasoline. The compositions obtained have the following properties: A29: Ethanol: Isoamyl alcohol: Isobutanol = 80: 18. 4: 1.2: 0.4% by volume DVPE = 70.0kPa 0.5 (RON + MON) = 90.3 A95: Ethanol: Isoamyl alcohol: Isobutanol = 82: 16. 56: 1.08: 0.36% by volume DVPE = 69.9 kPa 0.5 (RON + MON) = 92.6 A98: Ethanol: Isoamyl alcohol: Isobutanol = 78: . 24: 1.32: 0.44% by volume DVPE = 70.0 kPa 0.5 (RON + MON) = 94.5 A mixture of additives comprising 25% by volume of ethanol, 60% by volume of isoamyl alcohol and 15% by volume of isobutanol, mix with summer grade gasoline. The compositions obtained have the following properties: A92: Ethanol: Isoamyl alcohol: Isobutanol = 80: 5: 12: 3% by volume DVPE = 66.0 kPa 0.5 (RON + MON) = 88.6 A95: Ethanol: Isoamyl alcohol: Isobutanol = 84: 4: 9.6: 2.4% by volume DVPE = 65.5 kPa 0.5 (RON + MON) = 91.3 A98-. Ethanol: Isoamyl alcohol: Isobutanol = 86: 3.5: 8.4: 2.1% by volume DVPE = 65.0 3Pa 0.5 (RON + MON) = 93.0 Similar results were obtained when other oxygen-containing compounds (c), and also C6-C12 hydrocarbons (d) of this invention, were used in the ratio established by this invention, to prepare the mixture of additives, which was then used for the preparation of gasolines containing ethanol. These gasoline completely satisfy the requirements for motor fuel used in standard spark plug ignition engines. Furthermore, the mixture of additives comprising ethanol and the oxygen-containing compound of this invention, other than ethanol with the ratio of the present invention, can be used as an independent motor fuel for motors adapted for operation on ethanol. EXAMPLE 3 Example 3 demonstrates the possibility of reducing the dry vapor pressure equivalent of the ethanol-containing motor fuel, for cases when gasolines with a dry vapor pressure equivalent in accordance with ASTM D-5191 to a level of 48 kPa (around 7 psi), they are used as the hydrocarbon base. To prepare the summer-free, lead-free, A92, A95, A98 gasoline blends that meet United States standards and are purchased in the United States under the Phillips J Base fuel brand, Union Clear Base and Indoleno, were used. The source gasolines comprise C5-C12 aliphatic and alicyclic hydrocarbons including saturated and unsaturated. Figure 1 shows the behavior of the DVPE of the motor fuel containing ethanol based on summer grade A92 gasoline in the United States. Motor fuels containing ethanol based on US gasoline for summer A95 and A98 respectively, show a similar behavior. US A92 summer gasoline has the following specification: DVPE = 47.8 kPa anti-knock index 0.S (RON + MON) = 87.7 Fuel 3-1 contains in US summer gasoline A92 and ethanol and It has the following properties for various compositions: A92: Ethanol = 95: 5% by volume DVPE = 55.9 kPa O .5 (RON + MON) = 89.0 A92: Ethanol = 90: 10% by volume DVPE = 55.4 kPa 0.5 (RON + MON) = 90.1 Fuel 3-2 contains gasoline for summer A92 of the EU, ethanol and the additives that contain oxygen, and has the following properties for the different compositions: A92: Ethanol: Isoamyl alcohol = 83: 8.5: 8.5% by volume DVPE = 47.5 kPa 0.5 (RON + MON) = 89.6 A92: Ethanol : Isoamypropionate = 82: 8: 10% by volume DVPE = 74.0 kPa 0.5 (RON + MON) = 89.9 A92: Ethanol: -ethylhexanol = 82: 8: 10% by volume DVPE = 47.8 kPa 0.5 (RON + MON) = 89.2 A92: Ethanol: Tetrahydrofurphyl alcohol = 82: 7: % by volume DVPE = 47.8 kPa 0.5 (RON + MON) = 89.3 A92: Ethanol: cyclohexanone = 82: 7: 10% by volume DVPE = 47.7 kPa 0.5 (RON + MON) = 89.1 A92: Ethanol: methoxybenzene = 80: 8.5: 11.5% by volume DVPE = 46.8 kPa 0.5 (RON + MON) = 90. S A92: Ethanol: Methoxytoluene = 82: 8: 10% by volume DVPE = 46.5 kPa 0.5 (RON + MON) = 90.8 A92: Ethanol: Methylbenzoate = 82: 8: 10% by volume DV E = 46.0 kPa 0.5 (RON + MON) = 90.5 The below engine fuel compositions show that it is not always necessary to reduce the excess DVPE of the motor fuel, caused by the presence of ethanol at the level of 1 DVPE of gasoline origin. In some cases it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for summer grade gasoline in the US is 7 psi, which corresponds to 48.28 kP. A92: Ethanol: Isoamyl alcohol = 83: 9: 8% by volume DVPE = 48.2 kPa 0.5 (ROM + MON) = 89.8 A92: Ethanol: Methoxytoluene = 84: 8: 8% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 90.5 A92: Ethanol: Methylbenzoate = 85: 8: 7% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 90.1 Fuel 3-3 contains summer gasoline A92 from the EU (a), ethanol (b) ), the oxygen-containing additives (c.), and the C6-C12 hydrocarbons (d) and has the following properties for the various compositions: A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 75: 9.2: 0.3 : 0.1: 15.4% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 47.8 kPa 0.5 (RON + MON) = 89.5 A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: m-Isopropyl toluene = 75: 9.2: 0.3: 0.1: . 4% by volume DVPE = 47.0 kPa 0.5 (RON + MON) = 90.5 A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Isooctane = 75: 9.2: 0.3: 0.1: 15.4% by volume DVPE = 47.8 kPa 0.5 (RON + MON) = 90.3 7 The below engine fuel compositions show that it is not always necessary to reduce the excess DVPE of the motor fuel, caused by the presence of ethanol at the DVPE level of the original gasoline. In some cases it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for US-grade gasoline is 7 psi, which corresponds to 48.28 kPa. A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 76: 9.2: 0.3: 0.1: 14.4% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 48.2 kPa 0.5 (RON + MON) = 89.6 A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: Isooctane - 76: 9.2: 0.3: 0.1: 10.4: 4% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 48.2 kPa 0.5 ( RON + MON) = 89.8 A92: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: m-Isopropyl toluene = 77: 9.2: 0.3: 0.1: 10.4: 3% by volume The boiling temperature for naphtha is 100-200 ° C DVPE = 48.2 kPa 0.5 (RON + ON) = 89.9 The following fuels demonstrate the possibility of adjusting the dry steam pressure equivalent (DVPE) of ethanol-containing motor fuel, based on gasoline for summer A98 the EU. US A98 gasoline has the following specification: DVPE = 48.2 kPa anti-knock index 0.5 (RON + MON) = 92.2 Comparative fuel 3-4 contained summer gasoline A98 of the US and ethanol, and had the following properties for the various compositions: A98: Ethanol = 95: 5% by volume DVPE = 56.3 kPa 0.5 (RON + MON) = 93.0 A98: Ethanol = 90: 10% by volume DVPE = 55.8 kPa 0.5 (RON + MON) = 93.6 Fuel 3 -5 contained gasoline for summer A98 of the US (a), ethanol (b) and the additives containing oxygen (c), and had the following properties for the various compositions: A98: Ethanol: Isoamyl alcohol = 82.5: 9: 8.5% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 93.3 A98: Ethanol: Isoamyl alcohol: Isobutyl alcohol = 82.5: 9: 7: 1.5% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 93.4 A98: Ethanol: Tetrahydrofurfuryl alcohol = 80: 10: % by volume DVPE = 48.0 kPa 0.5 (RON + MON) = 93.7 Fuel 3-6 contained gasoline for summer A98 of the EU (a), ethanol (b), additives containing oxygen (c) and hydrocarbons Ce-C12 (d), and had the following properties for the various compositions: A98: ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 75: 9.2: 0.3: 0.1: 15.4% by volume The boiling temperature for naphtha is 100-200 ° C DVPE = 48.2 kPa 0.5 (RON + MON) = 93.3 A98: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Isooctane = 75: 9.2: 0.3: 0.1: 15.4% by volume DVPE = 48.2 kPa 0.5 ( RON + MON) = 93.9 A98: E anol: Isoamyl alcohol: Isobutyl alcohol: 'm- Isopropyl toluene = 75.5: 9.2: 0.3: 0.1: 14. 9% by volume DVPE = 47.5 kPa 0.5 (RON + MON) = 94.4 A98: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: Isooctane = 75: 9.2: 0.3: 0.1: 8.4: 7% by volume The boiling temperature for naphtha it is 100- C DVPE = 48.2 kPa 0.5 (RON + MON) = 93. S A98: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: m-isopropyl toluene ^ 75: 9.2; 0.3: 0.1; 10.4: 5% by volume The boiling temperature for naphtha is 100- C DVPE = 48.0 kPa 0.5 (RON + MON) = 93.7 A98: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: Alkylated ^ 75: 9.2: 0.3: 0.1: 7.9: 7.5% by volume The boiling point of naphtha is 100-200 ° C The boiling temperature of the alkylate is 100- 200 ° C DVPE = 48.2 kPa 0.5 (RON + MON) = 93.6 The following fuels demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of the fuel for engine that contains ethanol, based on gasoline for summer A95 of the EU. The summer A95 gasoline in the US has the following specification: DVPE = 47.0 kPa anti-knock index 0.5 (RON + MON) = 90.9 The EU summer gas A95 was used as a reference fuel for the test carried out in the cycle. test EU2000 NEDC EC 98/69 in a Volvo 240DL 1987 with a B230F engine, 4 cylinders, 2.32 liters (No.

LG4F20-87) that develops 83 kW at 90 revolutions per second and a torque of 185 Nm at 46 revolutions per second. The test carried out as above, shows that the A95 gasoline for summer in the US has the following results: CO (carbon monoxide) 2,406 g / km; HC (hydrocarbons) 0.356g / km; NOx (nitrogen oxides) 0.278g / km; C02 (carbon dioxide) 232.6g / km, - NMHC * 0.258g / km; Fuel consumption, Fc 1 * / I00km 9.93 hydrocarbons that are not methane. Comparative fuel 3-7 contained summer gasoline A95 of the US and ethanol, and had the following properties for the various compositions: A95: Ethanol = 95: 5% by volume DVPE = 55.3 kPa 0.5 (RON + MON) = 91.5 A95: Ethanol = 90: 10% by volume DVPE = 54.8 kPa 0.5 (RON + MON) = 92.0 The test for the gasoline / alcohol reference mixture (RFM3), comprises 90% by volume of summer grade A95 gasoline from the US, and 10% by volume of ethanol, carried out in a Volvo 240 DL 1987 with a B230F engine, of 4 cylinders, of 2.32 liters (No. LG4F20-87) in accordance with the standard test method EU 2000 NEDC EC 98 / 69 demonstrated the following results compared to summer gasoline A95 in the US: CO -12.5%; HC -4.8%; NOx + 2.3%; C02 + 3.7%; NMHC * -4.0%; fuel consumption, F, 1/100 km +3.1; The "-" represents a reduction in the issuance, while "+" represents an increase in the issuance. Fuel 3-8 contains gasoline for summer A95 of the EU, ethanol and the oxygen-containing additives, and has the following properties for the various compositions: A95: Ethanol: Isoamyl alcohol = 83: 8.5: 8.5% by volume DVPE = 47.0 kPa 0.5 (RON + MON) = 91.7 A95: Ethanol: n-Amyl acetate ^ 80: 10: 10% by volume DVPE = 47.0 kPa 0.5 (RON + MON) = 91.8 A95: Ethanol: Cyclohexyl acetate = 80: 10: 10% by volume DVPE = 46.7 kPa 0.5 (RON + MON) = 9 .0 A95: Ethanol: Tetramethyltetrahydrofuran = 80: 12: 8% by volume DVPE = 47.0 kPa 0.5 (RON + MON) = 92. S A95: Ethanol: Methyltetrahydropyran = 80: 15: 5% by volume DVPE = 46.8 kPa O .5 (RON + ON) = 92.5 The below engine fuel compositions show that it is not always necessary to reduce the excess DVPE of the engine fuel, caused by the presence of ethanol at the level of the DVPE of the gasoline of origin. In some cases, it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The level of the DVPE for gasoline grade summer of the EU is 7 psi, which corresponds to 48.28 kPa. A95: Ethanol: Isoamyl alcohol = 84: 8.5: 7.5% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 91.7 A95: Ethanol: Phenylacetate = 82.5: 10: 7.5% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 92.3 A95: Ethanol: Tetramethyltetrahydrofuran = 81: 10: 9% by volume DVPE = 48.2 kPa 0.5 (RON + MON) = 92.2 Fuel 3-9 contains gasoline for summer A95 of the EU (a), ethanol ( b), the oxygen-containing additives (c), and the C3-C12 hydrocarbons (d), and had the following properties for the various compositions: A95: Ethanol: Isoamyl alcohol: Isobutyl alcohol: naphtha = 75: 9.2: 0.3: 0.1: 15.4% by volume The boiling temperature for naphtha is 100- C DVPE = 47.0 kPa 0.5 (RON + MON) = 91.6 A95: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Isooctane = 75: 9.2: 0.3: 0.1: 15.4% by volume DVPE = 47.0 kPa 0.5 (RON + MON) = 92.2 A95 = Ethanol: Isoamyl alcohol: Isobutyl alcohol: m-Isopropyl toluene = 75: 9.2: 0.3: 0.1: . 4% by volume DVPE = 4S.8 kPa 0.5 (RON + MON) = 93.0 A95 = Ethanol: Tetrahydrofurfyl alcohol: Cyclooctatetraene = 80: 9.5: 0.5: 10% by volume DVPE = 46.6 kPa 0.5 (RON + MON) = 92.5 A95 = Ethanol: 4-Methyl-4-oxytetrahídropirano: Alocimeno = 80: 9.5: 0.5: 10% by volume DVPE = 46.7 kPa 0.5 (RON + MON) = 92.1.

The below engine fuel compositions show that it is not always necessary to reduce the excess DVPE of the motor fuel, caused by the presence of ethanol at the DVPE level of the gasoline of origin. In some cases it is sufficient to only enforce the requirements of the regulations in force for the corresponding gasoline. The DVPE level for summer grade gasoline in the US is 7 psi, which corresponds to 48.28 kPa. A95: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 76. S: 9.2: 0.3: 0.1: 7: 6.9% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 48.2 kPa 0.5 (RON + MON) = 91.7 A95: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha: IsooCtan = 76.5: 9.2: 0.3: 0.1: 7: 6.9% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 48.2 kPa 0.5 (RON + MON) = 92.2 A95: Ethanol: Isoamyl alcohol lo -. Isobutyl alcohol: m-Isopropyl toluene = 77: 9.2: 0.3: 0.1: 13. 4% by volume DVPE = 48.2 'kPa 0.5 (RON + MON) = 92.9 Fuel formulation 3-10 contained 76% by volume of summer A95 gasoline from the US, 9.2% by volume of ethanol, 0.25% by volume of alcohol of isoamyl, 0.05% by volume of isobutyl alcohol, 11.5% by volume of naphtha boiling at 100-200 ° C, and 3% by volume of isopropyltoluene. Formulation 3-10 was tested to demonstrate how the invention allows the production of gasoline containing ethanol that fully meets the requirements of the standards in force, firstly at the level of the DVPE and also for the other parameters. At the same time, this gasoline ensures a reduction of toxic emissions in the exhaust gases and decreases fuel consumption compared to the RFM 3 blend of the summer A95 gasoline of EU origin with 10% ethanol. Formulation 3-10 had the following specific properties: density at 15 ° C, according to ASTM D4052 77.9 kg / m3; Initial boiling point, according to ASTM D 86 36. leC; vaporizable portion -70 ° C 33.6% by volume; vaporizable portion -100 ° C 50.8% by volume; vaporizable portion -150 ° C 86.1% by volume, -vaporizable portion -190 ° C 97.0% by volume; final boiling point 204.8 ° C; evaporation residue 1.5% by volume; loss by evaporation 1.5% in volume; oxygen content, according to ASTM D481S 3.37% in w / w; acidity, according to ASTM D1613% by weight of HAc 0.007; pH, according to ASTM D1287 7.58; Sulfur content, according to ASTM D 4543 47 mg / kg; Gum content, according to ASTM D381 2.8 mg / 100 ml; water content, according to ASTM D6304 0.02% in w / w; aromatic, according to SS 155120, including benzene 31.2% by volume; benzene only, according to EN 238 0.7% by volume; DVPE, according to ASTM D 5191 48.0 kPa; anti-knock index 0.5 (RON + MON) according to ASTM D 2699-86 and ASTM D 2700-86 92.2 The fuel formulation for engine 3-10 was tested on a Volvo 240 DL, 1987 with a B230F engine, 4 cylinders, 2.32 liters ( No. LG4F20-87) with the EU 2000 test method NEDC EC 98/69 as above, and gave the following results in comparison (+) or (-)% with the results for summer gasoline of origin A95 of the EU. : CO -15.1% HC -5.6% NOx + 0.5% C02 without change; NMHC -4.5%; Fuel consumption, Fe, l / 100km without change. Similar results were obtained when the other oxygen-containing compounds replaced the tested compounds containing oxygen. To prepare all of the above fuel formulations, US summer gasoline is initially mixed with ethanol, to which mixture the corresponding additive containing oxygen was then added. The obtained motor fuel composition was then allowed to stand before testing between 1 and 24 hours, at a temperature not lower than -34 ° C. All the above formulations were prepared without the use of any mixing device. It was established the possibility of using the mixture of additives comprising ethanol and oxygen-containing compounds other than ethanol, also to adjust the vapor pressure of the motor fuels containing ethanol, used in the internal combustion ignition engines standard, based on summer grade gasolines that meet EU standards. By adding the Ce-C12 hydrocarbons to the composition of the additive mixture, the efficiency of the vapor pressure was increased, reducing the impact of the additive on the excess vapor pressure caused by the presence of ethanol in the gasoline. The additive mixture comprising 60% by volume of ethanol, 32% by volume of isoamyl alcohol and 8% by volume of isobutyl alcohol, was in different proportions mixed with the US summer grade gasolines having a pressure equivalent of dry steam (DVPE) not greater than 7 psi, which corresponds to 48,328 kPa. The compositions obtained had the following properties: A92: Ethanol: Isoamyl alcohol: Isobutanol = 87.5: 7.5: 4: 1% by volume DVPE = 51.7 kPa 0.5 (RON + MON) = 89.7 A95: Ethanol: Isoamyl alcohol: Isobutanol = 85: 9: 4. 8: 1.2% by volume DVPE = 51.0 kPa 0.5 (RON + M0N) = 91.8 A98: Ethanol: Isoamyl alcohol: Isobutanol = 80: 12: 5.4: 1.6% by volume DVPE = 52. O kPa 0.5 (ON + MON) = 93.5 The above examples demonstrate the possibility of partially lowering the vapor pressure in excess, by about 50% of the vapor pressure in excess of gasoline, induced by the presence of ethanol in the mixture.

A mixture of additives comprising 50% by volume of ethanol and 50% by volume of methyl isobutyl ketone was mixed in different proportions with the US summer gasoline with a dry vapor pressure equivalent (DVPE) not greater than 7 psi , which corresponds to 48.28 kPa. The compositions obtained had the following properties: A92: - Ethanol: Methyl isobutyl ketone = 85: 7.5: 7.5% by volume DVPE = 49.4 kPa 0.5 (RON + MON) = 90.0 A95: Ethanol: Methyl isobutyl ketone = 84: 8: 8% in DVPE volume = 48.6 kPa 0.5 (RON + MON) = 91.7 A98: Ethanol: Methyl isobutyl ketone = 82: 9: 9% by volume DVPE = 49.7 kPa 0.5 (RON + MON) = 93.9 The above examples demonstrate the possibility of partially lowering the excess vapor pressure by about 80% of the vapor pressure in excess of gasoline induced by the presence of ethanol in the mixture. Figure 2 shows the behavior of dry vapor pressure equivalent (DVPE) as a function of the ethanol content in the US summer A92 gasoline blends and the additive mixture 4 comprising 35% by volume of ethanol, 1% by volume of isoamyl alcohol, 0.2% by volume of isobutanol, 43.8% by volume of naphtha whose boiling is at temperatures between 100-170 ° C, and 20% isopropyl toluene. Figure 2 shows that the use of this mixture of additives in the formulation of a gasoline containing ethanol allows the reduction of more than 100% of the excess vapor pressure induced by the presence of ethanol. Similar results were obtained for DVPE for summer grade gasoline from EU A95 and A98 mixed with the additive mixture composed of 35% by volume of ethanol, 1% by volume in isoamyl alcohol, 0.2% by volume of isobutanol, 43.8 by volume of naphtha whose boiling is at 100-170 ° C and 20% by volume of isopropyltoluene. Similar results were obtained when other compounds containing oxygen and C6-C12 hydrocarbon of this invention were used in the proportion established by this invention, to formulate the mixture of additives, which was then used for the preparation of gasoline containing ethanol. These gasolines completely satisfy the requirements for motor fuels used in standard internal combustion spark ignition engines. Additionally, the mixture of additives comprising ethanol, the oxygen-containing compound other than ethanol and the C6-Ci2 hydrocarbons in the proportion and composition of the present invention, can be used as an independent motor fuel for engines adopted for operation in ethanol. EXAMPLE 4 Example 4 demonstrates the possibility of reducing the dry vapor pressure equivalent of the ethanol-containing motor fuel, for cases when the hydrocarbon base of the fuel is a non-standard gasoline with a dry-pressure equivalent according to ?? ?? D-5191, at a level of 110 kPa (around 16 psi). To prepare the mixtures of this invention, the lead-free winter gasoline A92, A95 and A98 purchased in Sweden from Shell, Statoil, Q80K and Preem and the gas condensate (G) purchased in Russia from Gasprom were used. The hydrocarbon component (HCC) for motor fuel compositions was prepared by mixing about 85% by volume of winter gasoline A92, A95 or A98 with about 15% by volume of gas condensate hydrocarbon liquid ( GC). To prepare the hydrocarbon component (HCC) for fuel formulations 4-1 to 4-10 of this motor fuel composition, about 85% by volume of winter gasoline A92, A95 or A98 was first mixed with the liquid of condensed gas hydrocarbon (GC). The obtained hydrocarbon component (HCC) was then allowed to stand for 24 hours. The resulting gasoline contained aliphatic and C3-C12 alicyclic hydrocarbons including saturated and unsaturated. Figure 1 shows the behavior of the DVPE of the motor fuel containing ethanol based on winter gas A98 and gas condensate. Ethanol-containing motor fuel, based on winter gasoline A92 and A98, and gas condensate (GC), showed similar behavior. Gasoline comprising 85% by volume of winter gasoline A92, and 15% by volume of gas condensate (GC), had the following properties: DVPE- 110.0 kPa anti-knock index 0.5 (RON + MON) = 87.9 The comparative fuel 4-1 contained A92 winter gasoline, gas condensate (GC) and ethanol, and had the following properties for the various compositions: A92: GC: Ethanol = 80.75: 14.25: 5% by volume DVPE = 115.5 kPa 0.5 (RON + MON) = 89.4 A92: GC: Ethanol = 76.5: 13.5: 10% by volume DVPE = 115.0 kPa 0.5 (RON + MON) = 90.6 The fuel of the invention 4-2 contained the winter gasoline A92, gas condensate (GC ), ethanol and the oxygen-containing additive, and had the following properties for the various compositions: A92: GC: Ethanol: Isoamyl alcohol = 74: 13: 6.5: 6. 5% by volume DVPE = 109.8 kPa 0.5 (RON + MON) = 90.35 A92: GC: Ethanol: 2.5 Diimethyltetrahydrofuran = 68: 12: : 10% by volume DVPE = 110.0 kPa 0.5 (RON + MON) = 90.75 A9: GC: Ethanol: Propanol = 68: 12: 12: 8% by volume DVPE = 109.5 kPa 0.5 (RON + MON) = 90.0 | A92 : GC: Ethanol: Diisopropylcarbinol = 72: 13: 7.5: 7. 5% by volume DVPE = 109.0 kPa 0.5 (RON + MON) = 90.3 A92: GC: Ethanol: Acetophenone- 72; 13: 9: 6% by volume DVPE = 110.0 kPa 0.5 (RON + MON) = 90.8 A92: GC: Ethanol: Isobutylpropionate = 75: 13: 5: 7% by volume DVPE = 109.2 kPa 0.5 (RON + MON) = 90.0 Fuel 4-3 contained gasoline of winter A92, the gas condensate (GC), ethanol, the additive that contained oxygen and the hydrocarbons Ce-C12, and had the following properties for the various compositions: A.92-. GC: Ethanol: Isobutanol: Isopropylbenzene = 68:12: 9. 5: 0.5: 10% by volume DVPE = 108.5 kPa 0.5 (RON + MON) = 91.7 A92: GC: Ethanol: Tert-butylethyl ether: Naphtha = 68: 12: 9.5: 0.5: 10% by volume The boiling temperature for the naphtha is 100- 200 ° C DVPE = 108.5 kPa 0.5 (RON + MON) = 90.6 95 A92: GC: Ethanol: Isoamilmethyl ether: Toluene = 68:12: 9. 5: 0.5: 10% by volume DVPE = 107.5 kPa 0.5 (RON + ON) = 91.6 The fuel compositions below demonstrate that the invention allows the reduction of the DVPE in excess of non-standard gasoline, up to the level of gasoline corresponding standard. The DVPE for standard A92 winter gasoline is 90 kPa. A92 -. GC: Ethanol: Isoamyl alcohol: Naphtha: Alkylated = 55: 10: 9.5: 0.5: 12.5: 12.5% by volume.

The boiling temperature for naphtha is 100-200 ° C The boiling temperature for alkylation is 100-130 ° C DVPE = 90.0 kPa 0.5 (RON + ON) = 90.6 A92: GC: Ethanol: Isoamyl alcohol: Naphtha: ethylbenzene = 55: 10: 9.5: 0.5: 15: 10% by volume The boiling point for naphtha is 100-200 ° C. DVPE = 89.8 kPa 0.5 (RON + MON) = 90.9 A92: GC: Ethanol: Isoamyl alcohol: Naphtha: Isopropyl toluene = 55: 10: 9.5: 0.5: 20: 5% by volume The boiling temperature for naphtha is 100- 200 ° C DVPE = 90.0 kPa 0.5 (RON + MON) = 90.6 The following compositions demonstrate the possibility of adjusting the dry vapor pressure equivalent (DVPE) of fuel mixtures containing ethanol, based on around 85% in volume the A98 winter gasoline and about 15% by volume of the gas condensate. Gasoline comprising 85% by volume of winter gasoline A98 and 15% by volume of gas condensate (GC), had the following specification: DVPE = 109.8 kPa anti-knock index 0.5 (RON + MON) = 92.0 Comparative fuel 4- 4 contained A98 winter gasoline, gas condensate (GC) and ethanol, and had the following properties for the various compositions: A98: GC: Ethanol = 80.75: 14.25: 5% by volume DVPE = 115.3 kPa 0.5 (RON + M0N) = 93.1 A98: GC: Ethanol = 76.5: 13.5: 10% by volume DVPE = 114.8 kPa 0.5 (RON + MON) = 94.0 Fuel 4-5 of the invention contained winter gas A98, gas condensate (GC) and additives that contain oxygen, and had the following properties for the various compositions: A98: GC: Ethanol: Isoamyl alcohol = 74: 13: 6.5: 6. 5% by volume DVPE = 109.6 kPa 0.5 (RON + MON) = 93.3 A98: GC: E anol: Ethoxybenzene = 74: 13: 7.5: 7.5% by volume DVPE = 110.0 kPa 0.5 (RON + MON) = 94.0 A98: GC : Ethanol: 3,3,5 Trimethylcyclohexanone = 72: 13: 7. 5: 7.5% by volume DVPE = 109.8 kPa 0.5 (RON + MON) = 93.3 Fuel 4-6 contained winter gasoline A98, gas condensate, ethanol, oxygen-containing additives and C3-Ci2 (d) hydrocarbons, and had the following properties for the various compositions: A98: GC: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 68: 12: 9.2: 0.6: 0.2: 10% by volume The boiling temperature for naphtha is 100- DVPE = 107.4 kPa 0.5 (RON + MON) = 93.8 A98: GC: Ethanol: Ethyl isobutyl ether: Mircene = 72: 13: 9. 5: 0.5: 5% by volume DVPE = 110.0 kPa 0.5 (RON + MON) = 93.6 A9B: GC: Ethanol: Isobutanol: Isooctane = 68: 12: 5: 5: % by volume DVPE = 102.5 kPa 0.5 (RON + MON) = 93.5 The motor fuel compositions below show that the invention allows the reduction of the DVPE in excess of non-standard gasoline, up to the DVPE level of the petrol standard corresponding. The DVPE for the standard A98 winter gasoline is 90.0 kPa. A92: GC: Ethanol: Isoamyl alcohol: Naphtha: Alkylated = 55: 10: 9.5: 0.5: 12.5: 12.5% by volume The boiling temperature for naphtha is 100- 200 ° C The boiling temperature for alkylation is 100 - 130 ° C. DVPE = 89.9 kPa 0.5 (RON + MON) = 9 .0 A92: GC: Ethanol: Isoamyl alcohol: Naphtha: Isopropylbenzene = 55: 10: 9.5: 0.5: 15: 10% by volume The boiling temperature for naphtha is 100-200 ° C. DVPE = 89.6 kPa Ó.5 (RON + ON) = 94.2 A92: GC: Ethanol: Isobutanol: Naphtha: Isopropyl toluene = 55: 10: 5: 5: 20: 5% by volume The boiling point of naphtha is 100- 200 ° C. DVPE = 88.5 kPa 0.5 (RON + MON) = 9 .1 The following compositions show the possibility of adjusting the dry vapor pressure equivalent (DVPE) of fuel mixtures containing ethanol, based on around 85% volume of the A95 winter gasoline and about 15% by volume of gas condensate. Gasoline comprising 85% by volume of winter gasoline A98 and 15% by volume of gas condensate (GC) had the following specification: DVPE = 109.5 kPa anti-knock index 0.5 (RON + MON) = 90.2 The hydrocarbon component (HCC) ) which comprises 85% by volume of winter gasoline, and 15% by volume of gas condensate (GC), was used as a reference fuel for the tests, as described above, and gave the following results: CO 2.033 g / km; HC 0.279 g / km; NOx 0.279 g / km; C02 229.5 g / km, - NMHC 0.225 g / km; Fuel consumption, Fe, 1/100 km 9.89 Fuel 4-7 contained A95 winter gasoline, gas condensate (GC) and ethanol, and had the following properties for the various compositions: A95: GC: Ethanol = 80.75: 14.25 : 5% by volume DVPE = 115.0 kPa 0.5 (RON + MON) = 91.7 A95: GC: Ethanol = 76-5: 13.5: 10% by volume DVPE = 114.5 kPa 0.5 (RON + MON) = 92.5 The fuel mixture of reference (RFM4) comprising 80.75% of winter gasoline A95, 14.25% gas condensate (GC) and 5% ethanol, was tested as described above, and gave the following results in comparison (+) or (-) % with the results of gasoline comprising 85% by volume of winter gasoline A95, and 15% by volume of gas condensate (GC): CO -6.98%; HC -7.3%; NOx + 12.1%; C02 + 1.1%; NMHC -5.3%, - Fuel consumption, Fe, 1/100 km + 2.62%. The fuel of the invention 4-8 contained winter gasoline A95, gas condensate (GC), ethanol and the additives containing oxygen, and had the following properties for the various compositions: A95: GC: Ethanol: Isoamyl alcohol = 74 : 13: 6.5: 6. 5% by volume DVPE = 109.1 kPa 0.5 (RON + MON) = 92.0 A95: GC: Ethanol: Phenol = 72: 13: 8: 7% by volume DVPE = 107.5 kPa 0.5 (RON + MON) = 92.6 A95: GC: Ethanol: Phenyl acetate = 68: 12: 10: 10% by volume DVPE = 106.0 kPa 0.5 (RON + MON) = 92.8 A95: GC: Ethanol: 3-Hydroxy-2-butanone = 68: 12: 10: 10% in volume DVPE = 108.5 kPa 0.5 (RON + MON) = 91.6 A95: GC: Ethanol: Tert -butylacetoacetate = 68: 12: 10: % by volume DVPE = 108.0 kPa 0.5 (RON + MON) = 92.2 A9S: GC: ethanol: 3, 3, 5-trimethylcyclohexanone = 71: 12: 9: 8% by volume DVPE = 108.5 kPa 0.5 (RON + MON) = 91.6 Fuel 4-9 contained gasoline winter A95 gas condensate (GC), ethanol, oxygen-containing additives and hydrocarbon Ce-Ci2 (d) and had the following properties for the various compositions: A95: GC: Ethanol: Isoamyl alcohol: Isobutyl alcohol: Naphtha = 68: 12: 9.2: 0.6: 0.2: 10% by volume The boiling temperature for naphtha is 100- 200 ° C. DVPE = 107.0 kPa 0.5 (RON + MON) = 92.1 A95: GC: ethanol: Isobutanol: Cyclooctatetraene = 72: 13: 9.5: 0.5: 5% by volume DVPE = 108.5 kPa 0.5 (RON + MON) = 92.6 The below engine fuel compositions demonstrate that the invention allows the reduction of the excess vapor pressure equivalent (DVPE) of a non-standard gasoline at the corresponding standard gasoline level. The DVPE of the standard A95 winter gasoline is 90.0 kPa. A95: GC: Ethanol: Isoamyl alcohol: Isobutanol: Naphtha: Alkylated = 55: 10: 9.2: 0.6: 12.5: 12.5% by volume The boiling temperature for naphtha is 100-200 ° C. The boiling temperature for the alkylation is 100-130 ° C. DVPE = 89.5 kPa 0.5 (RON + MON) = 92.4 A95: GC: Ethanol: Isoamyl alcohol: Naphtha: Tert-butylxylene = 55: 10: 9.5: 0.5: 20: 5% by volume The boiling temperature 'for naphtha it is 100-200 ° C. DVPE = 89.8 kPa 0.5 (RON + MON) = 92.5 A95: GC: Ethanol: Isobutanol: Naphtha: Isopropylbenzene = 55: 10: 5: 5: 20: 5% by volume The boiling temperature for naphtha is 100-200 ° C. DVPE = 89.9 kPa 0.5 (RON + MON) = 92.2 The 4-10 motor fuel contained 55% by volume of winter gasoline? 95, 10% by volume of gas condensate (GC), 5% by volume of ethanol, 5% by volume of tert-butanol, 20% by volume of naphtha with a boiling temperature of 100-200 ° C and 5% by volume of isopropyltoluene. Formulation 4-10 was tested to demonstrate how the invention allows the formulation of a gasoline containing ethanol that fully meets the requirements of the standards in effect, primarily with respect to the equivalent limit of dry vapor pressure, and also for other parameters of fuel, even when the. Source hydrocarbon component (HCC) has a DVPE considered to be superior to the requirements of the standard. At the same time, this gasoline containing ethanol, decreases the level of toxic emissions in the exhaust gases and decreases fuel consumption, compared to the mixture described above FM 4. Formulation 4-10 had the following specific properties: Density at 15 ° C, according to ???? D4052 698.6 kg / m3; Initial boiling point, according to AST D 86 20.5 ° C; Vaporizable portion -70 ° C 47.0% by volume; Vaporizable portion -100 ° C 65.2% by volume; Vaporizable portion -150 ° C 92.4% by volume; Vaporizable portion -180 ° C 97.3% by volume; Final boiling point 189.9 ° C; Residue by evaporation 0.5% in volume; Lost by evaporation 1.1% by volume Oxygen content, according to ASTM D4815 3.2% in w / w; Acidity, according to ASTM D1613% by weight HAc 0.001; pH, according to ASTM D1287 7.0; Sulfur content, according to ASTM D 54B3 18 mg / kg; gum content, according to ASTM D381 2 mg / 100 ml; water content, according to ASTM D6304 0.01% in w / w; aromatics, according to SS 155120, including benzene 30.9% by volume; benzene only, according to EN 238 0.7% by volume; DVPE, according to ASTM D 5191 90.0 JPa; anti-knock index 0.5 (RON + MON) according to ASTM D 2699-86 and ASTM D 2700-86 92.3 The motor fuel formulation 4-10 was tested as above, and gave the following results in comparison (+) or (-)% with the results for the motor fuel comprising 85% by volume of winter gas A95.and 15% by volume condensed gas: CO -14.0% HC -8.6%; NOx without change; C02 + 1.0%; MHC -6.7%; Fuel consumption, Fe, 1/100 km + 2.0% Similar results were obtained when replacing other oxygen-containing additives of the invention, by oxygen-containing additives of examples 4-1 to 4-10. To prepare all of the above fuel formulations 4-1 to 4-10 of this motor fuel composition, the hydrocarbon component (HCC), which is a mixture of winter gasoline and gas condensate (GC), was mixed initially with ethanol, to which the corresponding additive containing oxygen and the hydrocarbons 6-Ci2- was then added to the mixture. The obtained motor fuel composition was then allowed to stand before testing between 1 and 24 hours at a temperature not lower than -35 ° C. All the above formulations were prepared without the use of any mixing device. The fuel formulations of the invention, demonstrate the possibility of adjusting the vapor pressure of fuels for motor that contain ethanol, for ignition engines by standard internal combustion spark plugs, based on non-standard gasolines that have a high vapor pressure. Figure 2 shows the behavior of the dry vapor pressure equivalent (DVPE) as a function of the ethanol content of the hydrocarbon component mixtures (HCC), which comprise 85% by volume of winter gasoline A98 and 15% by volume. volume of gas condensate, and additive mixture 1, comprising 40% by volume of ethanol and 60% by volume of methyl benzoate. Figure 2 shows that the use of this mixture of additives, which comprises ethanol and the oxygen-containing additive other than ethanol, made it possible to obtain gasoline containing ethanol, the vapor pressure which does not exceed the vapor pressure of the strong hydrocarbon component (HCC). Similar results were obtained for the DVPE for fuel blends of the additive mixture, comprising 40% by volume of ethanol and 60% by volume of methyl benzoate, and the hydrocarbon component comprising 15% by volume of gas condensate. (GC) and 85% by volume of winter gasoline A92 to A95. Similar results were obtained when other compounds containing oxygen and C6-Ci2 hydrocarbons of this invention were used in the proportion of the invention to formulate the mixture of additives, which was then used for the preparation of gasolines containing ethanol.

These gasoline blends of the invention have a vapor pressure equivalent (DVPE) that does not exceed the DVPE of the source hydrocarbon component (HCC). At the same time, it is possible to add the oxygen-containing additive, only in sufficient quantity to obtain the gasoline containing ethanol, completely in compliance with the requirements for motor fuels, used in standard internal combustion spark ignition engines. EXAMPLE 5 Example 5 demonstrates the possibility of reducing the equivalent dry vapor pressure of the ethanol-containing motor fuel, for cases when the hydrocarbon base of the fuel is a reformulated gasoline as an equivalent of dry vapor pressure, of in accordance with ASTM D-5191 at the 27.5 kPa (around 4 psi) level. To prepare the mixtures of this reformulated, lead-free composition, gasoline purchased in Sweden from Preem and Russia from Lukoil, and petroleum benzine purchased from Merck in Germany were used. The hydrocarbon component (HCC) for motor fuel compositions was prepared by mixing about 85% by volume of winter gasoline A92, A95 or A98 with about 15% by volume of gas condensate hydrocarbon liquid (GC ). The source gasolines comprised aliphatic and C6-Ci2 alicyclic hydrocarbons, including saturated and unsaturated. Figure 1 shows the behavior of the DVPE of the motor fuel containing ethanol based on the A92 reformulated gasoline and petroleum benzine. A similar behavior was observed for the motor fuel containing ethanol, based on reformulated gasoline A95 and A98 and petroleum benzine. It should be noted that the addition of ethanol to reformulated gasoline induces a higher vapor pressure in increment compared to the addition of ethanol to standard gasoline. Gasoline comprising 80% by volume of reformulated gasoline A92 and 20% by volume of petroleum benzine (PB) has the following properties: DVPE = 27.5 kPa anti-knock index 0.5 (RON + MON) = 85.5 Comparative fuel 5-1 it contained reformulated gasoline A92, petroleum benzine (PB) and ethanol and had the following properties for the various compositions: A92-. PB: Ethanol = 76: 19: 5% by volume DVPE = 36.5 kPa 0.5 (RON + MON) = 89.0 A92: PB: Ethanol = 72: 18: 10% by volume DVPE = 36.0'kPa 0.5 (RON + MON) = 90.7 The fuel of the invention 5-2 contained reformulated gasoline A92, petroleum benzine (PB), ethanol and the additive containing oxygen, and had the following properties for the various compositions: A92: PB: Ethanol: Isoamyl alcohol = 64 : 16: 10: 10% by volume DVPE = 27.0 kPa 0.5 (RON + MON) = 90.5 A92: PB: Ethanol: Diisobutyl ester = 64: 16: 10: 10% by volume DVPE = 27.5 kPa 0.5 (RON + MON) = 90.8 A92: PB: Ethanol: n-Butanol = 64: 16: 10: 10% by volume DVPE = 27.5 kPa 0.5 (RON + MON) = 90.1 A92: PB: Ethanol: 2, 4, 4-Trimethyl-1-pentanol = 64: 16: : 10% by volume DVPE = 25.0 kPa 0.5 (RON + MON) = 91.8 Fuel 5-3 contained reformulated gasoline A92, petroleum benzine (PB), ethanol, oxygen-containing additives and also hydrocarbons CE-Ci2, and had the following properties for the various compositions: A92: PB: Ethanol: Isoamyl alcohol: Naphtha = 60: 15: 9. 2: 0.8: 15% by volume The boiling temperature for naphtha is 140-200 ° C. DVPE = 27.5 kPa 0.5 (RON + MON) = 89.3 A92: PB: Ethanol: n-Butanol: Naphtha: Xylene = 60: 15: 9.2: 0.8: 7.5: 7.5% by volume The boiling temperature for naphtha is 140- 200 ° C- DVPE = 27.5 kPa 0.5 (RON + MON) = 91.2 A92: PB: Ethanol: Tetrahydrofurfuryl alcohol: Isopropylbenzene = 60: 15: 9: 1: 15% by volume DVPE = 27.5 kPa 0.5 (RON + MON) = 91.3 The fuel compositions below demonstrate the possibility of adjusting the dry vapor pressure equivalent for gasolines containing ethanol, based on reformulated gasoline A98 and petroleum benzine (PB).

Motor fuel comprising 80% by volume of reformulated gasoline A98 and 20% by volume of petroleum benzine (PB) had the following properties: DVPE = 27.3 'kPa anti-knock index 0.5 (RON + ON) = 88.0 Comparison fuel 5-4 contained reformulated gasoline A98, petroleum benzine (PB) and ethanol and had the following properties for the various compositions: A98: PB: Ethanol = 76: 19: 5% by volume DVPE = 36.3 kPa 0.5 (RON + MON) = 91.0 A98: PB: Ethanol = 72: 18: 10% by volume DVPE = 35.8 kPa 0.5 (RON + MON) = 92.5 The fuel 5-5 of the invention containing the reformulated gasoline A98, petroleum benzine (PB), ethanol and the additives containing oxygen, and had the following properties for the various compositions: A98: PB: Ethanol: isoamyl = 64: 16: 10: 10% by volume DVPE = 26.9 kPa 0.5 (RON + MON) = 92.0 A98: PB: Ethanol: n-amyl alcohol = 64: 16: 10: 10% by volume DVPE = 26.5 kPa 0.5 (RON + MON) = 91.2 A98: PB: Ethanol: Linalool = 68: 17: 9: 6% by volume DVPE = 27.1 kPa 0.5 (RON + MON) = 92.6 A98: PB: Ethanol: 3, 6-dime - 3-octanol = 68: 17: 9: 6% by volume DVPE = 27.0 kPa 0.5 (RON + MON) = 92.5 Fuel 5-6 contained reformulated gasoline A98, petroleum benzene (PB), ethanol, additives that contained oxygen and C8 ~ C12 hydrocarbons (d) and had the following properties for various compositions: A98: PB: Ethanol: Isoamyl alcohol: Naphtha = 60: 15: 9. 2: 0.8: 15% by volume The boiling temperature for naphtha is 140-200 ° C. DVPE = 27.0 kPa 0.5 (RON + MON) = 91.7 A98: PB-. Ethanol: Linalool: Alocimeno = 60: 15: 9 :. 1: % by volume DVPE = 26.0 kPa 0.5 (RON + MON) = 93.0 A98: PB: Ethanol: Methylcyclohexanol: Limonene = 60: 15: 9.5: 1: 14.5% by volume DVPE = 25.4 kPa 0.5 (RON + MON) = 93.2 The motor fuel compositions below demonstrate the possibility of adjusting the dry vapor pressure equivalent of the fuel mixture containing ethanol, based on about 80% by volume of the reformulated gasoline A95 and about 20% by volume. volume of petroleum benzine (PB). Gasoline comprising 80% by volume of reformulated A92 gasoline and 20% by volume of petroleum benzine (PB) had the following properties: DVPE = 27.6 kPa anti-knock index 0.5 (RON + MON) = 86.3 The hydrocarbon component (HCC) ) which comprises B0% by volume of reformulated gasoline and 20% by volume of petroleum benzine (PB) was used as a reference fuel for testing in a 1987 Volvo 240DL with a B230F, 4 cylinder, 2.32 liter engine (No. LG4F20-87) in accordance with the test method EU 2000 NEDC EC 98/69, and gave the following results: CO 2,631 g / km; HC 0.348 g / km; NOx 0.313 g / km; C02 235.1 g / km; NMHC 0.308 g / km; Fuel consumption, Fe, 1/100 km 10.68 Fuel 5-7 containing reformulated gasoline A95, petroleum benzene (PB) and ethanol, had the different properties for the different compositions: A95: PB: Ethanol = 76: 19: 5% by volume DVPE = 36.6 kPa 0.5 (RON + MON) = 90.2 A95: PB: Ethanol = 72: 18: 10% by volume DVPE = 36.1 kPa 0.5 (RON + MON) = 91.7 The reference fuel mixture (RFM5 ) which comprised 72% of reformulated gasoline A95, 18% by volume of petroleum benzine (PB) and 10% by volume of ethanol, was tested in a volvo 240 DL 1987 with a B230F engine, 4 cylinders, 2.32 liters (No LG4F20-87) in accordance with the test method EU 2000 NEDC EC 98/69 as above, and gave the following results in comparison (+) or (-)% with the results for gasoline comprising 80% by volume of reformulated gasoline A92 and 20% by volume of petroleum gasoline (GC): CO -4.8% HC -1.3%; NOx + 26.3%; C02 +4.4; NMHC -0.6%; Fuel consumption, Fe, 1 / I00km + 5.7%.

Fuel 5-8 contains reformulated gasoline A95, petroleum benzine (PB), ethanol and oxygen-containing additives and had the following properties for the various compositions: A95: PB: Ethanol: Isoamyl alcohol = 64: 16: 10% in volume DVPE = 27.1 kPa 0.5 (RON + MON) = 92.0 A95: PB: Ethanol: 2, 6-dimethyl-4-heptanol = 64: 16: 10: 10% by volume DVPE = 27.0 kPa 0.5 (RON + MON) = 92.4 A95: PB: Ethanol: Tetrahydrofurfuryl acetate = 60: 15: 15: 10% in volume DVPE = 25.6 kPa 0.5 (RON + MON) = 93.0 Fuel 5-9 contained reformulated gasoline A95, petroleum benzine (PB), ethanol, oxygen-containing additives and CB-Ci2 hydrocarbons, and had the following properties for various compositions: A95: PB: Ethanol: Isoamyl alcohol: Naphtha = 60: 15: 9. 2: 0.8: 26% by volume The boiling temperature for naphtha is 140-200 ° C. DVPE = 27.1 kPa 0.5 (RON + MON) = 91.4 A95: PB: Ethanol; Tetrahydrofurfuryl alcohol: Tert-butylcyclohexane = 60: 15: 9.2: 0.8: 15% by volume DVPE = 26.5 kPa 0.5 (RON + MON) = 90.7 A95: PB: Ethanol: 4-methyl-4-hydroxytetrahydropyran: Isopropyl toluene = 60: 15: 9.2: 0.8: 15% in volume DVPE = 26.1 kPa 0.5 (RON + MON) = 92.0 The motor fuel 5-10 containing 60% in. volume of the A95 reformulated gasoline, 15% by volume of petroleum benzine (PB), 10% by volume of ethanol, 5% by volume of 2,5-dimethyltetrahydrofuran and 10% by volume of isopropyltoluene. Formulation 5-10 was tested to demonstrate how the invention allows the formulation of a gasoline containing ethanol with a low vapor pressure, wherein the presence in the ethanol motor fuel composition does not induce an increase in the equivalent of the presence of dry steam compared to the hydrocarbon component of origin (HCC). In addition, this gasoline ensures a reduction of toxic emissions in the exhaust gases and a decrease in fuel consumption, compared to the previous mixture RFM 5. The formulation 5-10 has the following specific properties: Density at 15 ° C, according to ASTM D4052 764.6 kg / m3; Initial boiling point, according to ASTM D 86 48.9 ° C Vaporizable portion -70 ° C 25.3% by volume Vaporizable portion -100 ° C 50.8% by volume Vaporizable portion -150 ° C 76.5% by volume Vaporizable portion -180 ° C 95.6% by volume Final boiling point 204.5 ° C Residue by evaporation 1.4% by volume Lost by evaporation 0.5% by volume Oxygen content, according to ASTM D4815 4.6% in p / p Acidity, according to ASTM D1613% by weight HAc 0.08 pH, according to ASTM D1287 7.5 sulfur content, according to ASTM D 5453 39 mg / kg gum content, according to ASTM D381 1.5 mg / 100 ml water content, according to ASTM D6304 0.1% in p / p aromatics, according to SS 155120, including benzene 38% by volume benzene only, according to EN 238 0.4% by volume DVPE, according to ASTM D 5191 27.2 kPa anti-knock index 0.5 (RON + MON), according to ASTM D 2699-86 and ASTM D 2700-86 91.8 The motor fuel formulation 5-10, was tested as previously described, and gave the following results in comparison (+) or (-)% with the results for motor fuel comprising 80% by volume of reformulated gasoline A95, and 20% by volume of petroleum gasoline: CO -12.3% HC -6.2%; NOx without change; C02 +2.6; NMHC -6.4%; Fuel consumption, Fe, 1/100 km + 3.7%, Similar results were obtained when other oxygen-containing additives of the invention, replace the oxygen-containing additives of examples 5-1 to 5-10. To prepare all of the above fuel formulations 5-1 to 5-10 of this motor fuel composition, the hydrocarbon component (HCC), which is a mixture of reformulated gasoline and petroleum benzine (PB) with ethanol, was initially mixed. , to which the corresponding additive containing oxygen and C8-Ci2 hydrocarbons was then added to the mixture. The obtained motor fuel composition was allowed to stand before the test between 1 and 24 hours at a temperature of not less than -35 ° C. All the above formulations were prepared without the use of any mixing device. The invention demonstrated the possibility of adjusting the vapor pressure of motor fuels containing ethanol for ignition engines by standard internal combustion spark plugs, based on non-standard gasoline having a low vapor pressure. Figure 2 shows the behavior of dry vapor pressure equivalent (DVPE) when mixing the hydrocarbon component (HCC), which comprises 80% by volume of reformulated gasoline A92 and 20% by volume of petroleum gasoline with the mixture 5 of oxygen-containing additive, comprising 40% by volume of ethanol, 20% by volume of 3, 3, 5-trimethylcyclohexanone, and 20% by volume of naphtha with a boiling temperature of 130-170 ° C and 20% by volume of tert-butyltoluene. The graph shows that the use of the additive of this invention allows to obtain gasolines containing ethanol, the vapor pressure of which does not exceed the vapor pressure of the hydrocarbon component of origin (HCC). The similar behavior of the DVPE was demonstrated when mixing the above additive containing oxygen with the hydrocarbon component (HCC) comprising 20% by volume of petroleum benzine (GC) and 80% by volume of reformulated gasoline A95 or A98. Similar results were obtained when other compounds containing oxygen and C9-C12 hydrocarbons of this invention were used in the proportion of the invention to formulate the oxygen-containing additive, which was then used for the preparation of gasolines containing ethanol. These gasolines have a vapor pressure equivalent (DVPE) no greater than the DVPE component of the origin hydrocarbon (HCC). At the same time, in anti-knock index for all gasolines containing ethanol prepared in accordance with this invention, it was higher than that of the hydrocarbon component of origin (HCC). The above description and examples of the preferred embodiments of this invention, should be taken as illustrative rather than limiting, of the present invention as defined by the claim. As will be readily appreciated, numerous variations and combinations of the above-stated aspects can be used without departing from the present invention as set forth in the claims. All these modifications are intended to be included within the scope of the appended claims.

It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims

Claims Having described the invention as above, the content of the following claims is claimed as property. A method characterized in that it is to reduce the vapor pressure of a motor fuel mixture based on C3-C12 hydrocarbons for conventional spark ignition internal combustion engines, containing 0.1 to 20% by volume of ethanol, not more than 0.25% by weight of water in accordance with ???? D 6304, and not more than 7% by weight of oxygen in accordance with ASTM D 4815, wherein, in addition to a component (a) of C3-Ci2 hydrocarbon and a component (b) of ethanol, a component (c) that contains oxygen is present in the fuel mixture from 0.05 to 15% by volume of the total volume of the fuel mixture; component (c) is selected from at least one of the following types of compounds: alkanol, having from 3 to 10 carbon atoms; dialkyl ether, having from 6 to 10 carbon atoms; ketone, which has from 4 to 9 carbon atoms; Alkanoic acid alkyl ester, having from 5 to 8 carbon atoms;
12S
hydroxy ona, which has from 4 to 6 carbon atoms; ketone ester of alkanoic acid, having from 5 to 8 carbon atoms; oxygen-containing heterocyclic compound, selected from the following: tetrahydrofurfuryl tetrahydrofurfuryl acetate, dimethyltetrahydrofuran, tetramethyl rahydrofuran, methyl ahydropurane, 4-methyl-4-oxytetrahydropurane, and mixtures thereof; and a component (d), selected from at least one Cg-Ci2 hydrocarbon, present in the fuel mixture in an amount such that the ratio (b): ((c) + (d)) is from 1: 200 to 200 : 1 per volume. The method according to claim 1, characterized in that the component (c) containing oxygen is added to the component (b) of ethanol, whose mixture of (c), (b) and (d) is subsequently added to the component (a) hydrocarbon. 3. The method according to claim 1, characterized in that the component (b) of ethanol is added to the component (a) of hydrocarbon, to which mixture of (b) and (a), component (c) is added. contains oxygen and component (d).
4. The method according to any of the preceding claims, characterized in that the component (a) of C3-C12 hydrocarbon is selected from the group consisting of a non-reformulated standard-type gasoline, a refined petroleum hydrocarbon liquid, a liquid of natural gas hydrocarbon, a hydrocarbon liquid of an exhaust gas of a chemical recovery carbonization, a hydrocarbon liquid of a synthesis gas process, or mixtures thereof, with a non-reformulated standard type gasoline being preferred.
5. The method according to any of the preceding claims, characterized in that the resulting fuel composition exhibits the following characteristics: (i) a density at 15 ° c, in accordance with ASTM D 4052, of at least 690 kg / m3; (iii) a dry vapor pressure equivalent in accordance with ASTM D 5191 from 20 kPa to 120 kPa; (iv) an acid content in accordance with ASTM D

1613 of not more than 0.1% by weight of HAc; (v) a pH in accordance with ASTM D 1287 from 5 to 9; (vi) an aromatics content in accordance with SS 155120 of no more than 40% by volume, wherein the benzene is present in amounts in accordance with EN 238 not greater than 1% by volume; (vii) a sulfur content in accordance with ASTM D 5453 of not more than 50 mg / kg; (viii) a gum content in accordance with ASTM D

381 of not more than 2 mg / 100 ml; (x) distillation properties in accordance with ASTM D86, wherein the initial boiling point is at least 20 ° C; a portion that vaporizes at 70 ° C is at least 25% by volume; a portion that is vaporized at 100 ° C is at least 50% by volume; a portion that is vaporized at 150 ° C is at least 75% by volume; a portion that is vaporized at 190 ° C is at least 95% by volume; a final boiling point not higher than 205 ° C; and a residue of evaporation not greater than 2% by volume; and (xi) an anti-knock index of 0.5 (RON + MON) in accordance with ASTM D 2699-86 and ASTM D 2700-86 of at least 80.
6. A motor fuel composition based on C3-C12 hydrocarbon for a conventional internal combustion spark ignition engine, containing from 0.1 to 20% by volume of ethanol, not more than 0.25% by volume of. water in accordance with ASTM D6304, and not more than 7% by weight oxygen in accordance with ASTM D4815, having a reduced vapor pressure, characterized in that it comprises: (a) a C3-C12 hydrocarbon component;

(b) a fuel grade ethanol in an amount of 0.1-20%, suitably 1-20%, preferably 3-15%, and more preferably 5-10% by volume of the total volume of the engine fuel composition; (C) an oxygen-containing component, comprising at least one of the following types of compounds: alkanol having from 3 to 10 carbon atoms, dialkyl ether having from 6 to 10 carbon atoms, ketone which has from 4 to 9 carbon atoms; Alkanoic acid alkyl ester having from 5 to 8 carbon atoms; 15-hydroxyketone having from 4 to S carbon atoms; ketone ester of alkanoic acid having from 5 to 8 carbon atoms; heterocyclic compound containing oxygen,

Selected from the following: tetrahydrofurfuryl alcohol, tetrahydrofurfuryl acetate, dimethyltetrahydrofuran, tetramethyltetrahydrofuran, methyl tetrahydropurane, 4-methyl-4-oxytetrahydropurane, and mixtures thereof, component (c) containing oxygen is

Present in an amount of 0.05-15% by volume, appropriately 0.1-15% by volume, preferably 3-10% by volume, and more preferably 5-10% by volume of the total volume of the motor fuel composition; (d) at least one C6-C12 hydrocarbon, preferably a hydrocarbon Ce -Cu, present in an amount such that the ratio (b): ((c) + (d)) is from 1: 200 to 200: 1 in volume.
7. A mixture of a fuel grade ethanol (b), a component (c) containing oxygen, and at least one hydrocarbon (d) C3-l2, which can be used in the method of claim 1, characterized in that: - the ethanol component (b) is present in an amount of 0.5-99.5%, appropriately from 9.5 to 99%, preferably from 20 to 95%, and more preferably from 25 to 92% by volume of the total volume of the product. mixture; - component (c) containing oxygen is selected from at least one of the following types of compounds: alkanol having from 3 to 10 carbon atoms; 20-dialkyl ether having from 6 to 10 carbon atoms, - - ketone having from 4 to 9 carbon atoms; - alkanoic acid alkyl ester having from 5 to 8 carbon atoms; 25-hydroxyketone having from 4 to 6 carbon atoms;

- Cetone ester of alkanoic acid having from 5 to 8 carbon atoms; oxygen-containing heterocyclic compound, selected from the following: tetrahydrofurfuryl alcohol, tetrahydrofurfuryl acetate, dimethyltetrahydrofuran, tetramethyltetrahydrofuran, methyl tetrahydropurane, 4-methyl-4-oxytetrahydropurane, and mixtures thereof, and is present in an amount of 0.5-99.5 %, suitably from 0.5% to 90%, preferably from 0.5 to 80%, and more preferably from 3 to 70% by volume of the total volume of the mixture; - the component (d) comprises at least one hydrocarbon Ce-izf preferably a hydrocarbon C8-CU (in an amount such that the ratio (b): ((c) + (d)) is from 1: 200 to 200: 1 in volume 8. The mixture according to claim 7, characterized in that the fuel-grade ethanol comprises at least 99.5% by volume of ethanol 9. The mixture according to claim 7, characterized in that the component (b) is a mixture of denatured ethanol as supplied on the market, comprising about 92% by volume of ethanol and the remaining part of 100% of component (b) is hydrocarbons and byproducts 10. The mixture according to claim 7, characterized in that the component (d) is an individual aliphatic, saturated and unsaturated hydrocarbon, or saturated or unsaturated alicyclic, or mixtures thereof, and / or a boiling hydrocarbon fraction at 100-200 ° C, which it is obtained in the distillation of petroleum, bituminous coal resin or products resulting from gas synthesis processes. The use of the mixture according to claim 7, as a motor fuel in an internal combustion spark ignition engine. The use of the mixture according to claim 7 to obtain a gasoline fuel, which contains components (a) + (b) + (c) + (d), for internal combustion ignition engines, and adjusting the octane number of such fuel to a desirable level by mixing a corresponding amount of the mixture with a conventional gasoline fuel (a), while maintaining or reducing the vapor pressure of the fuel composition thus obtained, as compared with the vapor pressure level of the gasoline component (a) alone. 13. The use of gasoline fuel according to claim 6, to reduce fuel consumption. in comparison with the corresponding gasoline-ethanol mixture comprising the components (a) + (b). 14. The use of gasoline fuel according to claim 6, to reduce the content of harmful substances in the emission of vapors, in comparison with the corresponding mixture of petrol · -ethanol comprising the components (a) + (b) . 15. The use of any of claims 13 and 14, wherein the oxygen content in the engine fuel is not more than 7% by weight, preferably not more than 5% by weight of the total weight of the fuel.