WO2013023372A1

WO2013023372A1 - A gasoline composition and its preparation method

Info

Publication number: WO2013023372A1
Application number: PCT/CN2011/078538
Authority: WO
Inventors: 李华; 刘粮帅
Original assignee: 湖南中创化工股份有限公司
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2013-02-21
Also published as: EP2722383A4; KR20140051419A; EP2722383B1; JP5981994B2; KR101700490B1; JP2014525976A; EP2722383A1

Abstract

Disclosed are a gasoline composition and its preparation method. Said gasoline composition comprises raw gasoline and acetic acid secbutyl ester, in terms of the total weight of the gasoline composition, with the contents of acetic acid secbutyl ester being 1-30 weight%, contents of the raw gasoline being 70-99 weight%. The preparation method of the gasoline composition comprises the step of adding acetic acid secbutyl ester into raw gasoline.

Description

Gasoline composition and preparation method thereof

Technical field

The present invention relates to a gasoline composition and a process for the preparation thereof, and more particularly to a high octane gasoline composition and a process for the preparation thereof. Background technique

The traditional addition of octane in gasoline is mainly lead compounds, but due to the serious environmental pollution of lead compounds, China has banned the production of leaded gasoline. The octane number of gasoline can now be increased by adding an aromatic compound, an oxygenate or methylcyclopentadienyl manganese tricarbonyl (MMT) to the gasoline.

Commonly used oxygenates mainly include ether compounds and alcohol compounds, wherein the ether compounds include methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE) and tert-amyl methyl ether (TAME). The most commonly used of the above ether compounds is MTBE, but MTBE has the following disadvantages: First, the solubility of MTBE in water is about 4.2% by weight, and MTBE has an unpleasant odor. When the content in water exceeds 40-95 pg/L. , it will make the water produce an unpleasant smell; Second, MTBE is difficult to biodegrade, so once the gasoline with MTBE is leaked, MTBE will remain in the environment for a longer period of time. In view of the fact that MTBE is likely to cause serious pollution to soil and drinking water, in the future urban clean gasoline standard to be implemented in China, the amount of MTBE added is limited, and the amount of MTBE in gasoline should not exceed 15% by weight. For the alcohol-based compound, methanol, ethanol and tert-butanol are the main ones, but the alcohol-based compound has high water solubility, and is easily separated from gasoline by water, which has a negative impact on engine performance. Therefore, the use of the alcohol-based compound is to some extent. Limited. Since the aromatic hydrocarbon compound is liable to have a negative impact on the environment, the amount of the aromatic hydrocarbon compound added to the gasoline is also severely limited.

In addition, methylcyclopentadienyl manganese tricarbonyl (MMT) is also a commonly used gasoline additive in China.

MMT is a highly efficient unleaded gasoline antiknock additive that improves both octane and lead. MMT is less popular and less expensive, so it is favored by users. However, the combustion products of MMT will form deposits on the spark plug of the engine, which will deteriorate the combustion conditions; MMT will be easily decomposed by light, which will cause the octane number in the process of gasoline to decrease. At the same time, the manganese-containing waste gas generated serious pollution to the environment, and most developed countries have now banned the use of MMT. China's realistic third-stage motor vehicle emission standards (ie, National III standards) also clearly stipulate that the manganese content of motor gasoline is not more than 0.016g/L.

At present, attention has also been paid to the use of ester compounds as an additive component for increasing the octane number of gasoline.

CN1198466A discloses a gasoline additive composition and a method for producing the same, which comprises 0-5.0% by weight of cyclopentadiene, 0.4-1.6% by weight of halogenated olefin, 0-1.5% by weight of halogenated Ethane, 0.3-4.0% by weight of ester, 30.0-65.0% by weight of aromatic hydrocarbon, 0-5.0% by weight of enzyme, 1.0-5.0% by weight of organic acid anhydride, 0-10.0% by weight of castor oil, 30.00-60.0 by weight 5% solvent and 0.001-0.02% by weight dye. Wherein the ester has the formula C _x COOC _y (wherein X is an integer from 1 to 4, and y is an integer from 1 to 3), and may be selected from the group consisting of ethyl acetate, propyl acetate, and butyl acetate. A mixture of one or both of dimethyl malonate, diethyl malonate, and the like, wherein the mixing ratio of the two esters is generally 1:1:1:3. Although the additive composition can increase the octane number of the gasoline, the aromatic hydrocarbon content of the additive composition is high, and therefore, the increase in the octane number of the gasoline substantially benefits from the added aromatic hydrocarbon; and, because of the high aromatic content The additive composition is difficult to meet increasingly stringent environmental standards. In addition, the composition of the gasoline additive composition is complicated, the preparation process is cumbersome, and it is not conducive to lowering low cost.

CN1513954A discloses a multifunctional fuel and a method for producing the same, the raw material of the multifunctional fuel comprising a main material and an auxiliary material. Among them, the main raw materials include: light hydrocarbons, light oil, wood essence, sulfonated oil, coal tar, gasoline and diesel; auxiliary materials including ethyl octadecanoate, ash manganese oxide, sodium hydroxide, water, ethanol, peroxidation Hydrogen, naphthol, petroleum ether, iron cyclopentadienide, acetone, toluene, phytic acid, sec-butyl acetate, butyl valerate, isoamylene, ethyl acetate, calcium hypochlorite, sodium tetraborate , 2-phenylethanol and cyclohexanone. The above auxiliary materials are composed of four groups of formulas A, B, C and D, which respectively produce a cosolvent, an oxygen enhancer, a combustion improver, a smoke suppressant, an anti-shock anti-vibration agent, an antistatic agent, a preservative and an alkane regulator. . Among them, the formula of each group of recipes is as follows:

Group A: ethyl octadecanoate 2-20% by weight, ash manganese oxide 3-15% by weight, sodium hydroxide 2-15% by weight, water 40-80% by weight, ethanol 5-30% by weight;

Group B: 5-25 wt% of naphthol, 10-30 wt% of petroleum ether, 5-20 wt% of hydrogen peroxide, 5-30 wt% of iron cyclopentadiene, 3-30 wt% of acetone, toluene 5- 30% by weight;

Group C: Phytic acid 5-25% by weight, sec-butyl acetate 3-30% by weight, butyl valerate 5-30% by weight, Isopenten 10-40% by weight, Ethyl acetate 5-20% by weight, Double Cyanamide 5-40% by weight;

Group D: dicyclohexylamine 2-20% by weight, calcium hypochlorite 3-30% by weight, sodium tetraborate decahydrate 5-35 wt%,

2-phenylethanol 5-50% by weight, cyclohexanone 5-30% by weight, polyalkenyl succinimide 5-35 wt%.

The above four groups of formulas are formulated into a comprehensive additive group E by reaction, and then the group E is added to the main material as needed to prepare a multifunctional fuel. Although the versatile fuel uses sec-butyl acetate, sec-butyl acetate is added to the multifunctional fuel as an auxiliary agent, and the amount of sec-butyl acetate added is low, wherein sec-butyl acetate The amount added in the multifunctional fuel is less than 0.5% by weight. Moreover, although CN1513954A specifically discloses the production of gasoline engine fuel, 50 parts by weight of No. 70 gasoline, 30 parts by weight of wood essence, 20 parts by weight of No. 120 solvent oil and 0.45 parts of Group E comprehensive additive may be mixed, but The specific performance specifications of the gasoline engine fuel prepared are not disclosed.

The main problem of the fuel additive disclosed in CN1513954A is that: the fuel additive has many components, and therefore, the preparation process is complicated and the cost is too high; and the four groups of formulas A, B, C and D contain olefins, and the content of olefins is Higher, it is not conducive to reducing the olefin content of gasoline, so it is not environmentally friendly.

EP0905217A discloses an unleaded gasoline containing an oxygen-containing compound having 2 to 15 carbon atoms, the content of the oxygen-containing compound in gasoline being such that the content of oxygen atoms is based on the total amount of gasoline. 0.1-15% by weight. The introduction of the oxygenate can reduce the amount of smoke exhausted from the engine, suppress the smoldering of the spark plug, and reduce the build-up of gasoline in the combustion chamber. Although EP0905217A specifically discloses that the oxygenate may be an ester compound, the examples thereof only disclose gasoline containing methyl tert-butyl ether, tert-amylethyl ether and methoxypropyl acetate, respectively. And the disclosed octane number of gasoline containing methyl tert-butyl ether, tert-amylethyl ether and methoxypropyl acetate, respectively, was not significantly improved.

GB 2,114,596 A discloses a fuel composition comprising 3 to 50% by volume of t-butyl acetate; and specifically discloses a fuel composition comprising 90% by volume of gasoline and 10% by volume of t-butyl acetate. The octane number and motor octane number of the fuel composition are higher than that of the raw material gasoline. However, as a high-grade chemical intermediate, t-butyl acetate is relatively expensive and is added as a component of gasoline. uneconomic.

In summary, the development of gasoline additives with high octane number, long induction period, low gel content, non-toxic and low price, and environmentally friendly and efficient improvement of gasoline antiknock is becoming an increasingly important research. Question. Summary of the invention

The invention is to overcome the deficiencies of the prior art, and to provide a gasoline composition with good antiknocking property, long induction period, low gel content, green environmental protection and low cost, and a preparation method thereof, and the preparation method is simple and convenient to operate. Production costs are low.

The gasoline composition according to the present invention contains raw gasoline and sec-butyl acetate, and the content of the sec-butyl acetate is 1 to 30% by weight based on the total amount of the gasoline composition, and the content of the raw gasoline is 70-99% by weight.

The method for producing a gasoline composition according to the present invention comprises the step of adding sec-butyl acetate to the raw gasoline, the amount of the sec-butyl acetate added in the gasoline composition based on the total amount of the gasoline composition The content of sec-butyl acetate is from 1 to 30% by weight, and the content of the raw gasoline is from 70 to 99% by weight.

The gasoline composition of the present invention employs sec-butyl acetate as an additive (i.e., a blending component). Compared with existing gasoline additives, sec-butyl acetate has high octane number, low toxicity, low solubility in water and low cost, especially compared with additives for improving the antiknock property of gasoline. Secondary butyl acetate is a more efficient, environmentally friendly and economical gasoline additive.

According to the gasoline composition of the present invention, the sec-butyl acetate in the gasoline composition can improve the octane number and the antiknock index of the existing gasoline, thereby improving the antiknock property of the gasoline. At the same time, the sec-butyl acetate in the gasoline composition can also function to dilute the aromatics content of the gasoline component, thereby reducing the environmental pollution of the aromatic hydrocarbons. Further, the gasoline composition containing sec-butyl acetate has a long induction period and a low gel content. In addition, sec-butyl acetate is inexpensive and does not add to the cost of gasoline.

Specifically, the gasoline octane number of the gasoline composition obtained by adding 9.8% by weight of sec-butyl acetate to the catalytic gasoline is increased from 90.4 to 93.0, and the motor octane number is 81.4 increased to 83.6, the antiknock index increased from 85.9 to 88.3; and the induction period of catalytic gasoline containing 9.8% by weight of sec-butyl acetate was greater than 600 minutes, and the actual colloid content was only 2.77 mg/100 mL.

According to the method for producing a gasoline composition of the present invention, the purity of sec-butyl acetate is not particularly limited and has a good raw material suitability. Further, according to the method for producing a gasoline composition of the present invention, the use of sec-butyl acetate is flexible, and it can be used not only in place of the existing gasoline additive but also in combination with the existing gasoline additive. That is to say, the gasoline composition provided by the invention has a flexible preparation method, and can be added to the unreconciled gasoline component (such as catalytic gasoline fraction, straight-run gasoline fraction, etc.) obtained in a refinery or a chemical plant. Obtained from the ester, it can also be obtained by adding sec-butyl acetate to the existing finished gasoline, which has a broad spectrum and can comprehensively improve the performance of the raw gasoline in the finished gasoline and unconformed gasoline.

Further, the preparation method of the gasoline composition according to the present invention is simple in operation, and does not require a complicated process such as heating and reaction, and the sec-butyl acetate is added to the raw material oil and stirred uniformly. detailed description

Sec-butyl acetate is a colorless, transparent liquid that is insoluble in water but soluble in most organic solvents. The inventors of the present invention have found that sec-butyl acetate has excellent comprehensive properties and is a good gasoline additive. The following is a detailed description in conjunction with relevant performance indicators. 1, density

The density of motor gasoline is generally 0.70-0.78kg/m ³ , the density of sec-butyl acetate is 0.862kg/m ³ , and the addition of sec-butyl acetate is not applicable to vehicles under the condition of not more than 30% by weight. The density of gasoline causes adverse effects.

2, octane number and anti-explosion index

Octane number is an important indicator for measuring the antiknock resistance of motor gasoline. It is also an important indicator for measuring gasoline additives.

The motor octane number and the research octane number (when the octane number is below 100 or 100) are compared under standard conditions with the knocking tendency of the sample with a known octane reference fuel. The reference fuel is isooctane (octane number)

100) The volume percentage of isooctane contained in the reference fuel, which is a mixture of n-heptane (zero octane number) and equivalent to the knocking strength of the sample, is the octane number of the sample. Among them, the motor octane number is determined according to the provisions of GB/T503, and the research method octane number is determined according to the provisions of GB/T5487.

The method for determining the octane number and the motor octane number is basically the same as that of the device, except that the standard conditions at the time of measurement are different. Motor octane is characterized by harsh conditions of higher gas mixture temperatures (typically heated to 149 ° C) and higher engine speeds (900 r/mi _n ± 10 _r /min), typically used to measure the throttle in the engine. The explosion resistance of gasoline when fully open and engine running at high speed. The research octane number is characterized by moderately harsh conditions of lower mixture temperature (generally not heated) and lower engine speed (600r/min ± 6r/min), which is generally used to assess the transition from low speed to The antiknock of gasoline at medium speed. The octane number of the same gasoline is generally higher than the motor octane number. The following relationship can be used to approximate the values of the two, 艮卩:

Motor octane number = research method octane number X 0.8 ten 10.

The difference between the octane number and the motor octane number is called the sensitivity of gasoline.

The sec-butyl acetate has a very high octane number, with a research octane number (RON) of 119 and a motor octane number (MON) of 107, which is significantly higher than the commonly used octane number of gasoline. Or additives (Table 1).

Table 1

Both the motor octane number and the research octane number are measured on a dedicated single-cylinder engine under standard test conditions, and it is difficult to fully reflect the antiknock performance of the fuel under vehicle operating conditions. Therefore, the empirical relationship of calculating the antiknock performance under the actual operating conditions of the vehicle is proposed.

Anti-explosion index = (1 € ^ ten MON) / 2

The antiknock index is used to reflect the average antiknock performance of gasoline under normal operating conditions. It can be seen from the above formula that the higher the octane number of gasoline, the better its explosion resistance, and the more the engine's power and economy can be reflected. The blast resistance index of sec-butyl acetate was 113, which was also significantly higher than the antiknock index of the gasoline additive listed in Table 1.

3, distillation range

Evaporation is one of the most important properties of gasoline. Before the gasoline enters the engine cylinder, it is first quickly in the gasification chamber. Gasifies and forms a combustible mixture with air. In general, the residence time of gasoline in the intake pipe is only

0.005-0.05S, the evaporation time in the cylinder is only 0.02-0.03s. In order to form a uniform combustible mixture in such a short period of time, in addition to the construction and operating conditions of the gasoline engine, the more important factor is the evaporability of the gasoline itself. The indicators reflecting the evaporation performance of gasoline are the distillation range and saturated vapor pressure. In the quality standards for Chinese motor gasoline, the distillation range indicators include 10% by volume evaporation temperature, 50% by volume evaporation temperature, 90% by volume evaporation temperature, and final boiling point (δΡ, dry point).

(1) 10% by volume evaporation temperature

The 10% by volume evaporation temperature indicates the amount of low-boiling fraction contained in gasoline, which has a decisive influence on the difficulty of starting the gasoline engine, and is also closely related to the tendency to generate gas resistance. The lower the 10% by volume evaporation temperature, the more low-boiling fractions contained in the gasoline and the higher the evaporability, making the gasoline engine easy to start at a low temperature; however, if the evaporation temperature is too low, gas resistance is likely to occur. China's motor gasoline quality standards require that 10% by volume of the evaporation temperature be no higher than 70 °C.

(2) 50% by volume evaporation temperature

The 50% by volume evaporation temperature indicates the average evaporation performance of the gasoline, which is closely related to the length of the heating time after the gasoline engine is started and whether the acceleration is timely. The lower the 50% by volume evaporation temperature of gasoline, the greater the evaporation at normal temperature, which can shorten the heating time of the gasoline engine, and at the same time, make the engine more sensitive and softer. If the 50% by volume evaporation temperature is too high, when the engine needs to change from low speed to high speed and the fuel supply amount increases sharply, most of the gasoline cannot be vaporized, resulting in incomplete combustion, and even a sudden flameout in severe cases. China's motor gasoline quality standards require 50% evaporation temperature not higher than 12CTC.

(3) 90% by volume evaporation temperature and finishing point

The 90% by volume evaporation temperature and the end point indicate the amount of heavy fraction in the gasoline. If the temperature is too high, it indicates that the gasoline contains too much heavy fraction, and it is not easy to ensure complete evaporation and complete combustion of the gasoline under the conditions of use. This will result in an increase in cylinder coke and an increase in fuel consumption. At the same time, the incompletely vaporized heavy fraction of gasoline will also flow into the crankcase, diluting the lubricating oil and increasing wear. In China's automotive gasoline quality standards, 90% of the evaporation temperature is not higher than 190 °C, and the final boiling point is not higher than 205 °C.

The sec-butyl acetate has a boiling point of 112.3 ° C and has a certain volatility. When added to gasoline, the evaporation temperature of 10% by volume and 50% by volume of gasoline slightly increases, and the evaporation temperature of 90% by volume decreases slightly. The evaporation performance of the gasoline composition has a negative impact.

4, residual amount

The residual amount of gasoline is also an important factor in the direct response of gasoline quality. It represents the most difficult component of gasoline to evaporate and the amount of oxidized jelly produced during storage. The high residual index will increase the carbon deposits in the combustion chamber and valve components, and the intake system and the carburetor throat will be severely cemented, thus affecting the normal operation of the engine. The National III standard stipulates that the residual amount is not more than 2%. The sec-butyl acetate has substantially no residual amount and does not adversely affect the residual amount of the gasoline composition.

5, saturated vapor pressure

Under the specified conditions, when the oil and gas are in equilibrium in a suitable test device, the maximum pressure displayed by the liquid surface vapor is called the saturated vapor pressure. Saturated vapor pressure is used to evaluate the evaporation strength of gasoline. It is a measure of whether gasoline is prone to generate gas resistance in a gasoline engine fuel supply system. It can also measure the loss tendency of gasoline in storage and transportation. The greater the saturated vapor pressure of gasoline, the stronger the evaporability, and the engine is prone to cold start, but the tendency to generate gas resistance increases, and the evaporation loss increases. Therefore, when the atmospheric pressure is different from the ambient temperature, the saturated vapor pressure of the gasoline The requirements are also different. The National III standard stipulates that the gasoline vapor pressure is not more than 88 kPa from November 1 to April 30, and is not more than 72 kPa from May 1 to October 31.

When sec-butyl acetate is added to gasoline, the saturated vapor pressure of gasoline is slightly decreased, but the effect is small, and the gasoline containing sec-butyl acetate can meet the Chinese national standard.

6, induction period

The induction period refers to the period of time that the oil is in a stable state under the specified accelerated oxidation conditions, and can be measured according to the method specified in GB/T8018. The method is summarized as follows: The sample is oxidized in an oxygen bomb. The oxygen bomb is first oxygenated at 65 ° 〇 -25 to 68 _§ 1^3⁄4 and then heated to 98 °C -102 °C. Read pressure at regular intervals, or continuously record pressure until the turning point is reached. The time required for the sample to reach the turning point is the measured induction period at the test temperature. From this measured induction period, the induction period at 10 CTC can be calculated. The induction period of gasoline is measured in minutes. Obviously, the induction period of gasoline is long, and the tendency to oxidize and form colloid is small. The National III standard stipulates that the induction period of gasoline is not less than 480 minutes. The induction period of sec-butyl acetate is greater than 600 minutes, meeting the national III index.

7. Water-soluble acid or alkali

The water-soluble acid refers to a mineral acid and a low molecular organic acid, and the water-soluble alkali refers to sodium hydroxide or the like. They are generally left in the oil refining process and have a strong corrosive effect on metals. They are not allowed in gasoline. The content of water-soluble acid or alkali in gasoline can be determined in accordance with the provisions of GB/T259. The method outline is: extracting the water-soluble acid or alkali in the sample with distilled water or an aqueous solution of ethanol, and then checking the change of the color of the extract with methyl orange or phenolphthalein indicator, respectively, or determining the pH of the extract by using a pH meter Value to determine the presence or absence of a water soluble acid or base. The sec-butyl acetate product is basically free of water-soluble acid and water-soluble alkali, and conforms to relevant Chinese national standards.

8, mechanical impurities and water

The refined gasoline produced by the refinery does not contain mechanical impurities and moisture. However, during storage and use, the gasoline is inevitably polluted by the outside world, causing mechanical impurities and moisture to enter the gasoline. Mechanical impurities in the gasoline may block the carburetor orifice and the fuel filter; it also exacerbates the wear of the carburetor orifice and the cylinder piston assembly. The moisture in the gasoline may freeze in winter. In severe cases, it will block the filter or the oil circuit, and even cause the oil supply to be interrupted. In addition, the water also accelerates the corrosion of the parts, dissolves the antioxidants, accelerates the oxidation of the raw rubber, and causes Decomposition of tetraethyl lead causes undesirable effects such as failure of additives such as a propellant. Check the gasoline for mechanical impurities and moisture. Generally, the sample should be placed in a lOOmL glass cylinder for 8-12 hours and should remain transparent and free of suspended and settled mechanical impurities and moisture. In case of disagreement, the mechanical impurities can be measured according to the method specified in GB/T511; the moisture can be measured according to the method specified in GB/T260. There were no mechanical impurities and moisture suspended and settled in the sec-butyl acetate.

9, aromatic content

The production of sec-butyl acetate produces no aromatics, so the sec-butyl acetate product has an aromatic content of zero.

10, olefin content

The olefin content of motor gasoline should be less than or equal to 30% by volume. Although a small amount of olefins are produced during the production of sec-butyl acetate, the olefin content is low and does not significantly increase the olefin content of the gasoline.

11, oxygen content

Limiting the oxygen content in motor gasoline is mainly a matter of considering the calorific value. When the oxygen content in the gasoline is increased, the effective component that can be burned in the gasoline is reduced, thereby lowering the calorific value and affecting the power of the engine. In addition, the oxygen content in gasoline has passed High, the carbon deposits in the cylinder will be less and less, and the cylinder exhaust valve loses the carbon deposit protection, so the wear will be more serious. In the current automotive gasoline standard, the oxygen content in gasoline should be less than 2.7% by weight. Although the oxygen content of sec-butyl acetate is 27.6% by weight, the gasoline containing sec-butyl acetate can satisfy the regulation of the gasoline standard for automobiles by controlling the amount of sec-butyl acetate added to the gasoline.

12, iron content

Iron production equipment is not used in the production of sec-butyl acetate, so the sec-butyl acetate product is also free of iron.

13, the actual gum

The actual gum is generally used to illustrate the tendency of gasoline to form deposits on the intake pipe and the intake valve. It is the portion of the gasoline evaporation residue that is insoluble in n-heptane measured under specified conditions. It can be measured according to the provisions of GB/T8019. The method is summarized as follows: The known amount of fuel is evaporated under the conditions of controlled temperature and controlled air, and the residue after pre-heptane extraction and extraction is weighed separately, and the result is The mg/100mL report can be used to measure the actual gum quality of gasoline. The National III standard stipulates that the actual gum content of gasoline when it leaves the factory is not more than 5mg/100mL. The actual gum of sec-butyl acetate is only 0.5-1.2 mg/lOOmL, which meets the requirements of the National III standard.

14, doctoral experiment

The doctoral test refers to the test of sodium sulfite and light petroleum products in the presence of sublimed sulfur to check the thiol or hydrogen sulfide in the oil, which can be determined according to the method specified in SH/T0174. The principle of the doctoral test is: Put 10mL sample and 5mL sodium lead solution into a 50mL measuring cylinder with a grinding plug and shake vigorously. If the sample contains hydrogen sulfide, black lead sulfide is formed. If there is no such reaction, add a little pure and dry powdered sublimed sulfur and shake it again. If a thiol is present in the sample, a series of reactions will cause changes in the color of the oil layer and the sulfur film. Through testing, sec-butyl acetate was passed through a doctoral experiment.

15. Copper corrosion (50°C, 3h)

Test the corrosion tendency of the oil for copper under specified conditions and check if the gasoline contains free sulfur and active sulfur compounds. When measuring, according to the method specified in GB/T5096, the method is summarized as follows: A piece of polished copper piece is immersed in a certain sample and heated to the specified temperature according to the product standard for a certain period of time. At the end of the test period, the copper sheet is removed and compared to the corrosion standard swatch after washing to determine the corrosion level. Corrosion standard swatches are divided into 4 levels, of which: 1 is mild discoloration; 2 is moderate discoloration; 3 is deep discoloration; and 4 is corrosion. The National III standard stipulates that the corrosion of copper in gasoline (50 ° C, 3 h) is not greater than Class 1. The copper sheet of sec-butyl acetate is corroded to la, which meets the requirements of the National III standard.

16, sulfur content

Sulfur content refers to the content of sulfur and its derivatives (such as hydrogen sulfide, mercaptans, and disulfides, etc.) present in gasoline, expressed as a percentage by mass. When sulfur or sulfur derivatives contained in gasoline encounter water or water vapor, sulfurous acid and sulfuric acid are formed, which is more intense under the conditions of gasoline combustion. Sulfurous acid and sulfuric acid have a strong corrosive effect on metals. At the same time, sulfur can also reduce the octane number of gasoline and the sensitivity of gasoline to tetraethyl lead (ie, reduce the increase in the octane number of gasoline by adding tetraethyl lead). Therefore, the National III standard stipulates that the sulfur content should not exceed 150 ppm. The sulfur content can be measured in accordance with the method specified in GB/T380.

The sulphur content of sec-butyl acetate is very low, below 3ppm, and is very suitable for the production of low-sulfur or even sulfur-free clean gasoline fuel. 17, methanol content

The production process of sec-butyl acetate does not produce methanol, and the raw material does not contain methanol. Therefore, the content of methanol in the sec-butyl acetate product is zero.

18, benzene content

Benzene is a highly toxic chemical product. The standard for benzene in motor gasoline is not more than 1.0% by volume. The benzene content can be determined according to the method specified in SH/T0693. In the event of any objection to the determination of the benzene content, the results measured by the method specified in SH/T0713 shall prevail. The sec-butyl acetate product was determined to be free of benzene.

19. Manganese content

Manganese content refers to the total manganese content in the form of methylcyclopentadienyl manganese tricarbonyl (MMT) in gasoline, and no other types of manganese-containing additives are added. The National III standard stipulates that the manganese content is not more than 0.016g/L and is determined by the method specified in SH/T0711. The Beijing Standard C gasoline standard stipulates that the manganese content is not more than 0.006g/L. The sec-butyl acetate product was determined to be free of manganese.

The above analysis results show that sec-butyl acetate has excellent performance indexes and is an excellent gasoline additive. According to the gasoline composition of the present invention, the sec-butyl acetate may be contained in an amount of from 1 to 30% by weight based on the total of the gasoline composition. When the content of sec-butyl acetate in the gasoline composition is less than 1% by weight, it is difficult to obtain a satisfactory effect of increasing the octane number and the antiknock index of the gasoline; when the content of sec-butyl acetate is high in the gasoline composition At 30% by weight, the gasoline composition is corroded to the fuel filler pipe of the gas station and the rubber gasket in the fueling gun and the rubber fuel pipe of the gasoline engine. The content of the sec-butyl acetate is preferably from the total amount of the gasoline composition from the viewpoint of further reducing the corrosiveness of various rubber articles in contact with the gasoline composition and controlling the oxygen content of the gasoline composition. 2-10% by weight.

The raw material gasoline in the gasoline composition according to the present invention may be various raw material gasolines which are commonly used in the art, and is not particularly limited. Specifically, the raw gasoline may be a commercially available finished gasoline that already contains various additives, such as: 90# gasoline, 93 # gasoline or 97 # gasoline; or gasoline fractions from refineries and chemical plants, for example: Catalytic cracking gasoline, alkylated gasoline, reformed gasoline, reformed raffinate oil, coking hydrogenated gasoline, straight run gasoline or light hydrocarbon C5, etc., the light hydrocarbon C5 refers to various hydrocarbons having 5 carbon atoms and mixture.

The raw material gasoline in the gasoline composition of the present invention may further contain one or more of an ether compound, an alcohol compound, and an aromatic compound. The total amount of the ether compound, the alcohol compound and the aromatic compound is 0.02 to 33% by weight based on the total amount of the gasoline composition.

The aromatic hydrocarbon compound may be various aromatic hydrocarbons commonly used in the art, and is not particularly limited. Preferably, the aromatic hydrocarbon compound is benzene, toluene, ethylbenzene, xylene (including ortho-xylene, meta-xylene and p-xylene), trimethylbenzene (including various isomers of trimethylbenzene), and C10 aromatic hydrocarbons. One or more. The C10 aromatic hydrocarbon means an aromatic hydrocarbon having 10 carbon atoms and a mixture thereof. The content of the aromatic hydrocarbon compound is preferably 0.02 to 33% by weight based on the total amount of the gasoline composition. From the viewpoint of environmental protection, the content of the benzene is preferably from 0.01 to 0.88% by weight based on the total amount of the gasoline composition.

The ether compound may be various ether compounds known to those skilled in the art. Preferably, the ether compound is one or more of methyl tert-butyl ether, ethyl tert-butyl ether, tert-amyl methyl ether and dibutyl ether. Preferably, the ether compound is contained in an amount of from 0.1 to 15% by weight based on the total of the gasoline composition.

The alcohol-based compound may be various alcohol-based compounds commonly used in the art. Preferably, the alcohol compound is one or more of methanol, ethanol, n-butanol, sec-butanol and tert-butanol. Based on the total amount of the gasoline composition, The content of the alcohol compound is preferably 0.02 to 10% by weight.

The performance indexes of the gasoline composition according to the present invention are in compliance with the provisions of the National Standard for Automotive Gasoline III (GB17930-2006 (III)) (Table 2), which not only has a high octane number, but also is environmentally friendly. Table 2

The present invention also provides a method for preparing a gasoline composition, the method comprising the step of adding sec-butyl acetate to a raw gasoline, the amount of the sec-butyl acetate being added based on the total amount of the gasoline composition The gasoline combination The content of sec-butyl acetate in the product is from 1 to 30% by weight, and the content of the raw gasoline is from 70 to 99% by weight.

The method for adding sec-butyl acetate to raw gasoline is not particularly limited, and may be various methods known to those skilled in the art as long as the raw gasoline can be uniformly mixed with sec-butyl acetate and sec-butyl acetate can be used. The content can be within the specified range. For example, a predetermined amount of sec-butyl acetate may be slowly added to the raw gasoline in a mixer under stirring, and stirred uniformly; sec-butyl acetate and raw gasoline may be simultaneously added to the mixer and stirred. Evenly.

The method for producing a gasoline composition according to the present invention, wherein the sec-butyl acetate is added in an amount such that the content of the sec-butyl acetate in the gasoline composition is 1 to 30% by weight based on the total amount of the gasoline composition. %. Preferably, the sec-butyl acetate is added in an amount such that the content of sec-butyl acetate in the gasoline composition is from 2 to 10% by weight based on the total amount of the gasoline composition.

Since the sec-butyl acetate can significantly improve the comprehensive performance of gasoline, especially the octane number, and the purity of the sec-butyl acetate itself is not too high, the present invention has no particular limitation on the source of the sec-butyl acetate. Any commercially available sec-butyl acetate. The purity of the sec-butyl acetate may be 80% by weight or more, preferably 90% by weight or more, and more preferably 97.5% by weight from the viewpoint of further reducing the content of the olefin in the gasoline composition and further increasing the octane number of the gasoline composition. The above is particularly preferably 99% by weight or more. When the purity of the sec-butyl acetate is within the above range, the content of the olefin in the gasoline composition can be ensured to meet the requirements of the national standard III, and the octane number of the gasoline composition can meet the use requirements, and the gasoline can be lowered. The cost of the composition.

According to the method for producing a gasoline composition of the present invention, the method further comprises the step of adding one or more of an ether compound, an alcohol compound and an aromatic compound to the raw gasoline. The total amount of the ether compound, the alcohol compound, and the aromatic compound in the gasoline composition is 0.02 to 33% by weight based on the total amount of the gasoline composition.

In the present invention, the order of addition of the sec-butyl acetate, the ether compound, the alcohol compound, and the aromatic compound is not particularly limited, and one of an ether compound, an alcohol compound, and an aromatic compound is added to the raw gasoline. The various steps and the step of adding sec-butyl acetate to the raw gasoline can achieve the objects of the present invention in various sequences.

The amount of the ether compound, the alcohol compound, and the aromatic compound to be added in the present invention is not particularly limited, and may be a conventional amount in the art as long as the gasoline composition is based on the total amount of the gasoline composition. The total amount of the ether compound, the alcohol compound and the aromatic compound in the range is 0.02 to 33% by weight. However, from the viewpoint of environmental protection and cost reduction, preferably, the ether compound is added in an amount such that the content of the ether compound in the gasoline composition is 0.1 to 15 by weight based on the total amount of the gasoline composition. %, the alcohol-based compound is added in an amount such that the content of the alcohol-based compound in the gasoline composition is from 0.02 to 10% by weight, and the aromatic hydrocarbon-based compound is added in an amount such that the aromatic hydrocarbon-based compound in the gasoline composition The content is from 0.02 to 33% by weight. From the viewpoint of environmental protection, the amount of benzene added to the aromatic compound to be added is such that the content of benzene in the gasoline composition is from 0.01 to 0.88% by weight based on the total amount of the gasoline composition.

The types of the ether compound, the alcohol compound, and the aromatic compound added to the gasoline composition have been described in detail above and will not be described herein.

Hereinafter, the present invention will be described in more detail with reference to the embodiments.

In the following examples, the test was carried out using the method specified in the Chinese National Standard GB17930-2006 (III). Example 1

This embodiment is intended to illustrate a gasoline composition and a method of producing the same according to the present invention.

In this example, sec-butyl acetate was purchased from Hunan Zhongchuang Chemical Co., Ltd. with a purity of 97.8 wt%, and the physical and chemical parameters of the sec-butyl acetate were as shown in Table 3 below.

2 parts by weight of sec-butyl acetate was added to 98 parts by weight of raw gasoline (catalyzed cracked hydrogenated gasoline supplied by Sinopec Changling Branch), and uniformly mixed to obtain a gasoline composition of the present invention, and acetic acid in the gasoline composition The content of the sec-butyl ester was 2% by weight, and the technical specifications of the obtained gasoline composition containing sec-butyl acetate were as shown in Table 3 below. Example 2

This example employed the same raw material gasoline and sec-butyl acetate as in Example 1.

5.1 parts by weight of sec-butyl acetate was added to 94.9 parts by weight of the raw gasoline, and after mixing, the gasoline composition of the present invention was obtained, and the content of the sec-butyl acetate in the gasoline composition was 5% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 3 below. Example 3

10 parts by weight of sec-butyl acetate was added to 90 parts by weight of the raw material gasoline, and uniformly mixed to obtain a gasoline composition of the present invention, wherein the content of sec-butyl acetate in the gasoline composition was 9.8% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 3 below. Example 4

30.7 parts by weight of sec-butyl acetate was added to 69.3 parts by weight of the raw gasoline, and the mixture was uniformly mixed to obtain the gasoline composition of the present invention. The content of the sec-butyl acetate in the gasoline composition was 30% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 3 below.

Comparative example 1

The same raw material gasoline and sec-butyl acetate as in Example 1 were used.

0.5 parts by weight of sec-butyl acetate was added to 99.5 parts by weight of the raw gasoline, and after mixing, a gasoline composition was obtained, and the content of the sec-butyl acetate in the gasoline composition was 0.5% by weight, and the obtained sec-butyl acetate was obtained. The technical specifications of the gasoline composition are shown in Table 3 below. Comparative example 2

The same raw material gasoline and sec-butyl acetate as in Example 1 were used.

35.8 parts by weight of sec-butyl acetate was added to 64.2 parts by weight of the raw gasoline, and after mixing, a gasoline composition was obtained, and the content of the sec-butyl acetate in the gasoline composition was 35 wt%, and the obtained sec-butyl acetate was obtained. The technical specifications of the gasoline composition are shown in Table 3 below. table 3

The results in Table 3 indicate that the gasoline composition containing 2-30% by weight of sec-butyl acetate has a high octane number and an antiknock index. Example 5

This example employs the same raw material gasoline as in the first embodiment.

The butyl urethane having a purity of 98.5% by weight, which is commercially available from Hunan Zhongchuang Chemical Co., Ltd., is shown in Table 4 below;

8.1 parts by weight of sec-butyl acetate was added to 91.9 parts by weight of the raw gasoline, and the mixture was uniformly mixed to obtain the gasoline composition of the present invention. The content of the sec-butyl acetate in the gasoline composition was 8% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 4 below. Comparative example 3

The same raw material gasoline as in Example 1 was used, and methyl tert-butyl ether having a purity of 98.5 wt% commercially available from Shanghai Yuanjing Chemical Co., Ltd. was used.

8.1 parts by weight of methyl t-butyl ether was added to 91.9 parts by weight of the raw material gasoline, and uniformly mixed to obtain a gasoline composition containing methyl tert-butyl ether, and the content of methyl tert-butyl ether in the gasoline composition The technical specifications of the obtained gasoline composition containing methyl tert-butyl ether were 8% by weight as shown in Table 4 below. Comparative example 4

The same raw material gasoline as in Example 1 was used, and n-butyl acetate having a purity of 98.5% by weight commercially available from Wuxi Baichuan Chemical Co., Ltd. was used.

8.1 parts by weight of n-butyl acetate was added to 91.9 parts by weight of the raw material gasoline, and after mixing, a gasoline composition containing n-butyl acetate was obtained, and the content of n-butyl acetate in the gasoline composition was 8% by weight. The technical specifications of the gasoline composition containing n-butyl acetate are shown in Table 4 below. Comparative example 5

The same raw material gasoline as in Example 1 was used, and the purity of the commercially available product from Shanghai Maoji Chemical Reagent Co., Ltd. was

98.5 wt% t-butyl acetate.

8.1 parts by weight of t-butyl acetate was added to 91.9 parts by weight of the raw material gasoline, and after uniformly mixing, a gasoline composition containing t-butyl acetate was obtained, and the content of tert-butyl acetate in the gasoline composition was 8% by weight. The technical specifications of the gasoline composition containing t-butyl acetate are shown in Table 4 below. Table 4

The results in Table 4 show that the gasoline composition containing sec-butyl acetate has a higher octane number and antiknock index than the gasoline composition containing t-butyl acetate and the gasoline composition containing n-butyl acetate. . Compared to gasoline compositions containing t-butyl acetate, gasoline compositions containing sec-butyl acetate have less actual gums and longer induction periods; in addition, the density of gasoline compositions containing sec-butyl acetate is higher. Gasoline compositions containing t-butyl acetate have a lower density. Therefore, sec-butyl acetate is more suitable for blending gasoline. Example 6

This example employs sec-butyl acetate which is commercially available from Hunan Zhongchuang Chemical Co., Ltd. with a purity of 80% by weight. 6.3 parts by weight of sec-butyl acetate was added to 93.7 parts by weight of raw gasoline (commercially available in #90 gasoline), and uniformly mixed to obtain a gasoline composition of the present invention, and the content of sec-butyl acetate in the gasoline composition was The technical specifications of the obtained gasoline composition containing sec-butyl acetate were 5% by weight as shown in Table 5 below. Example 7

In this example, the same raw material gasoline as in Example 6 was used, and sec-butyl acetate was commercially available from Hunan Zhongchuang Chemical Co., Ltd. with a purity of 90% by weight.

5.6 parts by weight of sec-butyl acetate was added to 94.4 parts by weight of the raw gasoline, and after mixing, the gasoline composition of the present invention was obtained, and the content of the sec-butyl acetate in the gasoline composition was 5% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 5 below. Example 8

In this example, the same raw material gasoline as in Example 6 was used, and urethane butyl acetate having a purity of 97.5 wt% commercially available from Hunan Zhongchuang Chemical Co., Ltd. was used.

5.1 parts by weight of sec-butyl acetate was added to 94.9 parts by weight of the raw gasoline, and after mixing, the gasoline composition of the present invention was obtained, and the content of the sec-butyl acetate in the gasoline composition was 5% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 5 below. Example 9

In this example, the same raw material gasoline as in Example 6 was used, and urethane butyl acetate having a purity of 99% by weight commercially available from Hunan Zhongchuang Chemical Co., Ltd. was used.

5.1 parts by weight of sec-butyl acetate was added to 94.9 parts by weight of the raw gasoline, and after mixing, the gasoline composition of the present invention was obtained, and the content of the sec-butyl acetate in the gasoline composition was 5% by weight, and the obtained acetic acid was obtained. The technical specifications of the sec-butyl ester gasoline composition are shown in Table 5 below. table 5

The results of Table 5 show that the method for producing a gasoline composition according to the present invention has no particular limitation on the purity level of sec-butyl acetate, and sec-butyl acetate having a purity level of not less than 80% by weight can be used, and thus according to the present invention The method for preparing a gasoline composition has good material adaptability. Example 10

In this example, sec-butyl acetate was purchased from Hunan Zhongchuang Chemical Co., Ltd. with a purity of 99.5% by weight. The octane number and antiknock index of the sec-butyl acetate were as shown in Table 6 below. 8 parts by weight of sec-butyl acetate was added to 92 parts by weight of raw gasoline (light hydrocarbon C5 supplied by Zhonghai Shell Petrochemical Co., Ltd.), and uniformly mixed to obtain a gasoline composition of the present invention. The content of the butyl ester was 8% by weight, and the octane number and the antiknock index of the obtained gasoline composition containing sec-butyl acetate were as shown in Table 6 below. Example 11

This example employs sec-butyl acetate having a purity of 80% by weight commercially available from Hunan Zhongchuang Chemical Co., Ltd., and the octane number and antiknock index of the sec-butyl acetate are shown in Table 6 below.

37.5 parts by weight of sec-butyl acetate was added to 62.5 parts by weight of raw gasoline (straight-run gasoline provided by Sinopec Changling Branch), and uniformly mixed to obtain the gasoline composition of the present invention, and the gasoline composition was sec-butyl acetate. The content of the ester was 30% by weight, and the octane number and the antiknock index of the obtained gasoline composition containing sec-butyl acetate were as shown in Table 6 below. Example 12

This example employs sec-butyl acetate having a purity of 90% by weight commercially available from Hunan Zhongchuang Chemical Co., Ltd., and the octane number and antiknock index of the sec-butyl acetate are shown in Table 6 below.

16.7 parts by weight of sec-butyl acetate was added to 83.3 parts by weight of raw gasoline (reconstituted raffinate oil supplied by Sinopec Shanghai Branch), and uniformly mixed to obtain a gasoline composition of the present invention. The content of the butyl ester was 15% by weight, and the octane number and the antiknock index of the obtained gasoline composition containing sec-butyl acetate were as shown in Table 6 below. Example 13

In this example, sec-butyl acetate having a purity of 95% by weight commercially available from Hunan Zhongchuang Chemical Co., Ltd. was used, and the octane number and antiknock index of the sec-butyl acetate were as shown in Table 6 below.

2.1 parts by weight of sec-butyl acetate was added to 97.9 parts by weight of raw gasoline (reformed gasoline supplied by Sinopec Changling Branch), and uniformly mixed to obtain a gasoline composition of the present invention, and the gasoline composition was sec-butyl acetate. The content of the ester was 2% by weight, and the octane number and the antiknock index of the obtained gasoline composition containing sec-butyl acetate were as shown in Table 6 below. Table 6

The results of Table 6 show that the method for preparing a gasoline composition according to the present invention can be used to increase the octane number of raw material gasoline of various sources, and has a broad spectrum. Example 14

In this example, sec-butyl acetate having a purity of 95% by weight commercially available from Hunan Zhongchuang Chemical Co., Ltd. was used, and the physical and chemical parameters of the sec-butyl acetate were as shown in Table 7 below.

Adding 10.5 parts by weight of sec-butyl acetate and 10 parts by weight of toluene (commercially available from Sinopec Changling Refinery, purity 98.5 wt%) to 79.5 parts by weight of raw gasoline (commercially available from Sinopec Changling Branch) In the cracked hydrogenated gasoline, the gasoline composition of the present invention is obtained by mixing uniformly. The content of the sec-butyl acetate in the obtained gasoline composition was 10% by weight, and the content of toluene was 10% by weight. The technical parameters of the gasoline composition are shown in Table 7 below. Comparative example 6

A gasoline composition was prepared in the same manner as in Example 14, except that sec-butyl acetate was not added, and 20.5 parts by weight of toluene was added to 79.5 parts by weight of the raw material gasoline, and uniformly mixed to obtain a gasoline composition. The technical parameters of the composition are shown in Table 7 below. Example 15

This example employed the same sec-butyl acetate and raw gasoline as in Example 14.

2.1 parts by weight of sec-butyl acetate and 2 parts by weight of methyl t-butyl ether (commercially available from Shanghai Yuanjing Chemical Co., Ltd., purity of 98.5 wt%) were added to 95.9 parts by weight of raw gasoline, and after mixing uniformly The gasoline composition of the present invention is obtained. The content of sec-butyl acetate in the obtained gasoline composition was 2% by weight, and the content of methyl tert-butyl ether was 2% by weight. The technical specifications of the gasoline composition are shown in Table 7 below. Comparative example 7

A gasoline composition was prepared in the same manner as in Example 15, except that sec-butyl acetate was not added, and 4.1 parts by weight of methyl t-butyl ether was added to 95.9 parts by weight of the raw gasoline, and the mixture was uniformly mixed to obtain a gasoline combination. The technical parameters of the gasoline composition are shown in Table 7 below. Example 16

5.3 parts by weight of sec-butyl acetate and 3 parts by weight of ethanol (commercially available from Henan Tianguan Fuel Ethanol Co., Ltd., purity of 98.5 wt%) were added to 91.7 parts by weight of raw gasoline, and uniformly mixed to obtain the present invention. Gasoline composition. The content of sec-butyl acetate in the obtained gasoline composition was 5% by weight, and the content of ethanol was 3% by weight. The technical specifications of the gasoline composition are shown in Table 7 below. Comparative example 8

A gasoline composition was prepared in the same manner as in Example 16 except that 8.3 parts by weight of ethanol was added to 91.7 parts by weight of the raw material gasoline without adding sec-butyl acetate, and the mixture was uniformly mixed to obtain a gasoline composition. The technical parameters of the composition are shown in Table 7 below.

Table 7

The results in Table 7 indicate that sec-butyl acetate can be used in combination with other gasoline additives. Comparing Example 14 with Comparative Example 6, it can be seen that sec-butyl acetate can be used not only to increase the octane number and the antiknock index of gasoline, but also to dilute the aromatic content in gasoline. Comparing Example 15 with Comparative Example 7, Example 16 and Comparative Example 8, it can be seen that the gasoline composition containing sec-butyl acetate has a higher octane number and antiknock index under the same conditions of addition. Example 17

This embodiment is intended to illustrate a gasoline composition and a method of producing the same according to the present invention. The same sec-butyl acetate and raw gasoline were used as in Example 5.

5 parts by weight of sec-butyl acetate, 5 parts by weight of ethyl tert-butyl ether (commercially available from Guangzhou Weibo Chemical Co., Ltd., purity of 98.5 wt%), 20 parts by weight of xylene (commercially available from Sinopec Lingling Refinery, purity of 98.5 wt%) and 2 parts by weight of t-butanol (commercially available from Shanghai Xingao Chemical Reagent Co., Ltd., purity of 98.5 wt%) were added to 68 parts by weight of raw gasoline, respectively, and mixed to obtain The gasoline composition of the present invention, wherein the gasoline composition has a sec-butyl acetate content of 5% by weight, an ethyl tert-butyl ether content of 5% by weight, a xylene content of 20% by weight, and a tert-butanol content. For 2% by weight, the technical parameters of the gasoline composition are shown in Table 8 below. Comparative example 9

A gasoline composition was prepared in the same manner as in Example 17, except that sec-butyl acetate was not added, and 10 parts by weight of ethyl t-butyl ether, 20 parts by weight of xylene, and 2 parts by weight of t-butyl, respectively. The alcohol was separately added to 68 parts by weight of the raw material gasoline, and uniformly mixed to obtain a gasoline composition having a content of ethyl tert-butyl ether of 10% by weight and a content of xylene of 20% by weight, tert-butanol. The content of the gasoline composition is as shown in Table 8 below. Example 18

The same sec-butyl acetate and raw gasoline were used as in Example 5.

5 parts by weight of sec-butyl acetate, 1 part by weight of methyl t-butyl ether (commercially available from Shanghai Yuanjing Chemical Co., Ltd., purity of 98.5 wt%) and 10 parts by weight of xylene (commercially available from Sinopec) Changling refinery, purity of 98.5 wt%) was added to 84 parts by weight of raw gasoline, and the mixture was uniformly mixed to obtain the gasoline composition of the present invention. The content of sec-butyl acetate in the gasoline composition was 5% by weight. The content of the tert-butyl ether was 1% by weight, and the content of xylene was 10% by weight. The technical parameters of the gasoline composition are shown in Table 8 below.

Comparative example 10

A gasoline composition was prepared in the same manner as in Example 18 except that sec-butyl acetate was not added, and 6 parts by weight of methyl t-butyl ether and 10 parts by weight of xylene were separately added to 84 parts by weight of the raw materials. In gasoline, after mixing, a gasoline composition is obtained. The content of methyl tert-butyl ether in the gasoline composition is 6% by weight, and the content of xylene is 10% by weight. The technical parameters of the gasoline composition are as follows: 8 is shown. Table 8

The results in Table 8 indicate that sec-butyl acetate can be used in combination with other additives, and that the gasoline composition containing sec-butyl acetate has a higher octane number and antiknock index.

Claims

Rights request

A gasoline composition, characterized in that the gasoline composition contains raw gasoline and sec-butyl acetate, and the content of the sec-butyl acetate is 1-30 based on the total amount of the gasoline composition. The raw material gasoline is contained in an amount of 70 to 99% by weight.

2. The gasoline composition according to claim 1, wherein the content of the sec-butyl acetate is 2 to 10% by weight based on the total amount of the gasoline composition, and the content of the raw material gasoline is 90- 98% by weight.

The gasoline composition according to claim 1, wherein the raw material gasoline contains one or more of an ether compound, an alcohol compound, and an aromatic compound, based on the total amount of the gasoline composition. The total amount of the ether compound, the alcohol compound, and the aromatic compound in the gasoline composition is 0.02 to 33% by weight.

The gasoline composition according to claim 3, wherein the aromatic hydrocarbon compound is one or more of benzene, toluene, ethylbenzene, xylene, trimethylbenzene and C10 aromatic hydrocarbon, and the gasoline composition The total amount of the aromatic hydrocarbon compound is 0.02 to 33% by weight.

The gasoline composition according to claim 3, wherein the ether compound is one or more of methyl tert-butyl ether, ethyl tert-butyl ether, tert-amyl methyl ether and dibutyl ether. The ether compound is contained in an amount of from 0.1 to 15% by weight based on the total of the gasoline composition.

6. The gasoline composition according to claim 3, wherein the alcohol compound is one or more of methanol, ethanol, n-butanol, sec-butanol and tert-butanol, with the gasoline composition The total amount of the alcohol-based compound is 0.02 to 10% by weight.

7. A method of preparing a gasoline composition according to claim 1, characterized in that the method comprises the step of adding sec-butyl acetate to the raw gasoline, the acetic acid being based on the total amount of the gasoline composition The sec-butyl ester is added in an amount such that the content of the sec-butyl acetate in the gasoline composition is from 1 to 30% by weight, and the content of the raw gasoline is from 70 to 99% by weight.

8. The production method according to claim 7, wherein the sec-butyl acetate is added in an amount such that the content of sec-butyl acetate in the gasoline composition is 2 based on the total amount of the gasoline composition. The content of the raw material gasoline is -10% by weight, and the content of the raw material gasoline is from 90 to 98% by weight.

The production method according to claim 7 or 8, wherein the sec-butyl acetate has a purity of not less than 80% by weight.

10. The preparation method according to claim 7, wherein the method further comprises adding an ether to the raw gasoline. a step of one or more of a compound, an alcohol compound, and an aromatic compound, wherein the ether compound, the alcohol compound, and the aromatic hydrocarbon compound in the gasoline composition are based on the total amount of the gasoline composition The total amount of the compound is

0.02-33% by weight.

The method according to claim 10, wherein the ether compound is added in an amount such that the total content of the ether compound in the gasoline composition is from 0.1 to 15% by weight, and the amount of the alcohol compound added is such that The total content of the alcohol-based compound in the gasoline composition is 0.02 to 10% by weight, and the aromatic hydrocarbon-based compound is added in an amount such that the total content of the aromatic hydrocarbon compound in the gasoline composition is 0.02 to 33% by weight.

The production method according to claim 10 or 11, wherein the ether compound is one or more of methyl tert-butyl ether, ethyl tert-butyl ether, tert-amyl methyl ether and dibutyl ether. The alcohol compound is one or more of methanol, ethanol, n-butanol, sec-butanol and tert-butanol, and the aromatic compounds are benzene, toluene, ethylbenzene, xylene, trimethylbenzene and C10. One or more of the aromatic hydrocarbons.