KR101700490B1 - A Gasoline Composition and Its Preparation Method - Google Patents

Abstract

Gasoline compositions and methods for their manufacture are disclosed. The gasoline composition comprises, from the viewpoint of the total weight of the gasoline composition, raw gasoline and acetic acid sec-butyl ester having a content of sec-butyl ester of 1-30% by weight, a content of raw gasoline of 70-99% . The process for preparing the gasoline composition comprises adding sec-butyl acetate to the raw gasoline.

Description

[0001] Gasoline Composition and Its Preparation Method [

More particularly, the present invention relates to a gasoline composition having a high octane number and a process for producing the same.

Conventional additive components that increase the octane number of gasoline are predominantly lead-containing compounds, which, due to their severe environmental contamination, have prohibited the production of lead-containing gasoline. Presently, the octane number of gasoline can be increased by adding an aromatic compound, an oxygen-containing compound or methylcyclopentadienyl manganese tricarbonyl (MMT).

Popular oxygen-containing compounds mainly include ether-based compounds and alcohol-based compounds. The ether-based compounds include methyl tert -butyl ether (MTBE), ethyl tert -butyl ether (ETBE) and tert -amyl methyl ether (TAME). Among the ether-based compounds, MTBE is the most popular, but MTBE has the following disadvantages. First, the solubility of MTBE in water is about 4.2 wt%, and when MTBE content in water exceeds 40-95 pg / L, MTBE is odorous and it will emit odor from water. Second, MTBE is almost biodegradable, so when leaking MTBE-containing gasoline, MTBE will remain in the environment for an extended period of time. Taking into account the serious contamination of MTBE to soil and drinking water, the clean urban gasoline standard to be implemented in China in the future will limit the addition of MTBE and specify that the content of MTBE in gasoline does not exceed 15 wt% . The alcohol-based compound mainly comprises methanol, ethanol and tert -butanol, but the alcohol-based compound has high solubility in water and is easy to separate from gasoline when contacted with water, The use of alcohol-based compounds is somewhat limited. Since the aromatics can have a negative impact on the environment, the content of aromatics added to gasoline is also strictly controlled.

Furthermore, MMT is also a commonly used gasoline additive in China. MMT is an effective anti-knock additive for lead-free gasoline, which can increase the octane number of gasoline. The amount of MMT added is small, its cost is low, so it is preferred by the user. However, the combustion products of the MMT will form deposits on the spark plugs of automobiles, which exacerbates the combustion conditions. MMT is readily decomposed when exposed to light, resulting in a decrease in octane number during gasoline use. On the other hand, the generated manganese-containing waste gas will cause serious environmental pollution. Today, the use of MMT has been banned in most developing countries. The Chinese domestic Phase III emission standards currently adopted in China also explicitly stipulate that the manganese content of gasoline for automobiles should not exceed 0.016 g / l.

At present, people are beginning to focus on the application of ester-based compounds as additive ingredients to raise the octane number of gasoline.

CN 1198466A discloses an additive composition for gasoline and a method of producing the same, which comprises a mixture of 0-5.0 wt% cyclopentadiene, 0.4-1.6 wt% alkenyl halide, 0-1.5 wt% ethane halide ), 0.3-4.0 wt% ester-based compounds, 30.0-65.0 wt% aromatic hydrocarbons, 0-5.0 wt% enzyme, 1.0-5.0 wt% organic anhydride, 0 -10.0 wt% castor oil, 30.00-60.0 wt% solvent and 0.001-0.02 wt% dye. Wherein the ester-based compound is a compound of the formula C _x COOC _y , which may be one or two mixtures selected from the group consisting of ethyl acetate, propyl acetate, butyl acetate, dimethyl malonate, diethyl malonate, wherein x is an integer of 1 to 4 and y is an integer of 1 to 3, wherein the mixing ratio of the two ester-based compounds is generally 1: 1 to 1: 3. Although the additive composition can increase the octane number of gasoline, the content of aromatic hydrocarbon therein is very high, so that the increase in the octane number of gasoline is an effect of the addition of aromatic hydrocarbons. In addition, as the content of aromatic hydrocarbons is high, it is difficult to satisfy the increasingly stringent environmental protection standards. Moreover, the additive composition of gasoline has a complex composition and a complicated manufacturing process, which is disadvantageous in cost reduction.

CN1513954A discloses a multifunctional fuel and a production method thereof. The raw material of the multifunctional fuel includes a main raw material and an auxiliary raw material. The main raw materials include light hydrocarbons, light oils, wood alcohols, sulfonated oils, coal tar, gasoline and diesel oil. The auxiliary raw material may be selected from the group consisting of ethyl stearate, potassium permanganate, sodium hydroxide, water, ethanol, hydrogen peroxide, ethyl naphthol, petroleum ether, It is also possible to use ferrocene, acetone, toluene, phytic acid, sec - butylacetate, butyl valerate, isoamylene, ethyl acetate ), Calcium hypochlorite, sodium tetraborate decahydrate, 2-phenethyl alcohol, and cyclohexanone. The auxiliary material comprises four formulas: A, B, C and D. By chemical reaction, they can be used as cosolvent, oxygenate, combustion improver, smoke suppressor, anti-knock agent, antistatic agent, Preservative and an alkane number regulator. ≪ / RTI > The proportions of each formulation are as follows:

Formulation A: 2-20 wt% ethyl stearic acid, 3-15 wt% potassium permanganate, 2-15 wt% sodium hydroxide, 40-80 wt% water and 5-30 wt% ethanol;

Formulation B: 5-25 wt% ethylnaphthol, 10-30 wt% petroleum ether, 5-20 wt% hydrogen peroxide, 5-30 wt% ferrocene, 3-30 wt% acetone, and 5-30 wt% toluene;

Formulation C: 5-25 wt% of phytic acid, 3-30 wt% of sec -butyl acetate, 5-30 wt% of butylsalicylate, 10-40 wt% of isoamylene, 5-20 wt% of ethyl acetate and 5-40 wt% of dicyandiamide %;

Formulation D: Dicyclohexylamine 2-20 wt%, calcium hypochlorite 3-30 wt%, sodium tetraborate decahydrate 5-35 wt%, 2- phenethyl alcohol 5-50 wt%, cyclohexanone 5-30 wt% 5-35 wt% of polyalkenyl succinimide.

By the reaction, the four agents are made of the combined additive E. Then, if necessary, additive E is added to the main material to obtain a multifunctional fuel by the reaction. Although the multifunctional fuel uses sec -butyl acetate, sec -butyl acetate is added to the multifunctional fuel as an adjuvant, and its addition amount is very low, less than 0.5 wt%. Moreover, although CN1513954A specifically states that during the production of gasoline engine fuel, 50 parts by weight of gasoline No. 70, 30 parts by weight of methyl alcohol and 20 parts by weight of solvent oil No. 120 can be mixed with 0.45 part by weight of the additive additive E Although this is disclosed, it does not disclose the detailed figure of merit of the gasoline engine fuel.

The main problems of the fuel additives disclosed in CN1513954A are in the following aspects. The fuel additive has a number of components, so the manufacturing process is complex and very expensive. Furthermore, all of formulations A, B, C and D contain olefins and contain a high content of olefins, which is undesirable for reducing the olefin content in gasoline, and so they are not environmentally friendly.

EP0905217A discloses lead-free gasoline comprising a C ₂ -C ₁₅ oxygen-containing compound wherein the content of oxygen-containing compounds in gasoline is such that the content of oxygen atoms is 0.1-15 wt% based on the total amount of gasoline, . The introduction of the oxygen-containing compound can reduce the amount of smog released from the engine, suppress smoke from the spark plug and reduce the carbon deposit of gasoline in the combustor. Although EP0905217A specifically discloses that the oxygen-containing compound may be an ester, the examples disclose only gasoline containing methyl tert -butyl ether, tert -amyl ether and methoxypropyl acetate, respectively, Is not significantly increased.

GB2114596A discloses a fuel composition comprising 3-50 vol% of tert -butyl acetate. GB2114596A specifically discloses a fuel composition comprising 90% by volume of gasoline and 10% by volume of tert -butyl acetate. The fuel composition has improved research octane number and motor method octane number as compared to gasoline as raw material, but tert -butyl acetate is expensive as a high-grade chemical intermediate, and is not economical as an additive component of gasoline.

Therefore, it has become an increasingly important research topic to develop non-toxic, low-cost gasoline additives that have high octane number, long induction period and low gum level, which improves the anti-knock characteristics of gasoline .

In order to overcome the disadvantages of the prior art, the present invention relates to an inexpensive, pollution-free environmentally friendly gasoline composition with excellent anti-knock characteristics, a long induction period and low grit levels, ≪ / RTI >

The gasoline composition according to the present invention comprises raw gasoline and sec -butyl acetate based on the total amount of said gasoline composition, said sec -butyl acetate having a content of 1-30 wt% And has a content of 70-99 wt%.

The method for producing a gasoline composition according to the present invention comprises the step of adding sec -butyl acetate to the raw material gasoline based on the total amount of the gasoline composition, wherein the sec -butyl acetate is added to the gasoline composition in sec - it is added in an amount to make the content of the raw gasoline in the range of 70-99wt% and the content of butyl acetate.

The gasoline composition according to the present invention uses sec -butyl acetate as an additive (i.e., a mixed component). Compared to existing gasoline additives, especially additives used to improve anti-knock properties of gasoline, sec -butyl acetate has a high octane number, low toxicity, low solubility in water and low cost, so sec- It is a more effective, environmentally friendly and economical gasoline additive.

In the gasoline composition according to the present invention, the sec -butyl acetate can increase the anti-knock index and octane number of the current gasoline, thus improving the anti-knock characteristic of gasoline. On the other hand, sec -butyl acetate in the gasoline composition can serve to dilute the content of aromatic hydrocarbons in the gasoline component, thereby alleviating environmental pollution from aromatic hydrocarbons. Furthermore, gasoline compositions containing sec -butyl acetate have a long induction period and low sword levels. In addition, sec -butyl acetate is inexpensive and will not increase the cost of gasoline.

Specifically, the octane number of the gasoline composition obtained by adding sec -butyl acetate in an amount of 9.8 wt% to the catalyzed gasoline was increased from 90.4 to 93.0 as compared with the gasoline catalyzed as raw material gasoline, Octane number is increased from 81.4 to 83.6, and the anti-knock index is increased from 85.9 to 88.3; The induction period of the catalyzed gasoline containing sec -butyl acetate in an amount of 9.8 wt% is over 600 min and in fact the sword level is only 2.77 mg / 100 ml.

The process for producing a gasoline composition according to the present invention is not particularly limited to the purity of sec -butyl acetate and is very flexible with respect to the raw material. Furthermore, according to the process for preparing a gasoline composition of the present invention, the sec -butyl acetate can be used flexibly as it can be used in combination with existing gasoline additives as well as replacing existing gasoline additives. In other words, the process for producing a gasoline composition provided by the present invention is flexible. The gasoline composition may be prepared by adding sec -butyl acetate to unmixed gasoline from a refinery or chemical plant (such as a fraction of catalysed gasoline and a fraction of straight run gasoline) By adding sec -butyl acetate to the finished gasoline. Thus, the process of the present invention has an excellent broad spectrum and can improve the performance of both finished and unmixed gasoline sold.

Additionally, the process for preparing a gasoline composition according to the present invention has a simple operation of adding sec -butyl acetate as the starting material and uniformly stirring without any complex process such as heating and reaction.

The gasoline composition according to the present invention comprises raw gasoline and sec -butyl acetate, wherein the sec -butyl acetate has a content of 1-30 wt%, based on the total amount of the gasoline composition, the raw gasoline has 70-99 wt% Lt; / RTI >

Sec - Butyl acetate is a colorless and clear liquid, insoluble in water, but mostly soluble in organic solvents. Through research, the inventors of the present invention have found that sec -butyl acetate has excellent overall performance and is an excellent gasoline additive. Hereinafter, this will be described in more detail in combination with an associated performance index.

1. Density

The density of automotive gasoline is generally 0.70-0.78 kg / m3, and the density of sec -butyl acetate is 0.862 kg / m3. If added in an amount not exceeding 30 wt%, the added sec -butyl acetate has no influence on the density of automotive gasoline.

2. Octane and anti-knock index

Octane value is an important index to measure the anti-knock characteristics of gasoline for automobiles and also an important index to measure gasoline additives.

The motor method octane number and the research method octane number (when the octane number is 100 or less) are all determined by comparing the knock tendency of the reference fuel with the test sample at a known octane number under standard conditions. The reference fuel is a mixture of iso -octane (octane number = 100) and n -heptane (octane number = 0). The volume percentage of iso -octane in the reference fuel with knocking intensity equal to that of the test sample is the octane value of the test sample. The motor method octane number is determined according to GB / T503, and the research method octane number is determined according to GB / T5487.

The motor method octane number and the research method octane number basically apply the same measurement method, and the apparatus excludes standard conditions for measurement. The motor method octane number is characterized by severe conditions of high temperature of the mixed gas (generally heated to 149 占 폚) and a high rotational speed of the engine (900r / min 占 0r / min), and the engine throttle And is normally used to determine the anti-knock characteristic of the gasoline when the engine is operating at high speed. By comparison, the research method octane number price is characterized by the low temperature (not generally heated) temperature of the mixed gas and the less severe conditions of the low rotational speed of the engine (600 r / min ± 6 r / min) Is typically used to evaluate anti-knock characteristics of gasoline during engine switching. Generally, the research method octane number of gasoline of the same kind is higher than the above-mentioned motor method octane number. The values of the above-mentioned research method octane number and the motor method octane number value can be roughly converted by the following Equation 1:

[Equation 1]

MON = RON x 0.8 + 10

The difference between the above-mentioned research method octane number and the motor method octane number is called gasoline sensitivity.

Sec -butyl acetate has a high octane number, wherein the above research method octane number (RON), which is apparently greater than the octane number of a commonly used component or additive to raise the octane number of the gasoline, reaches 119 and the motor method octane number (MON) reaches 107 (Table 1).

Item Improved gasoline Heavy aromatic hydrocarbons Butene alkylated oils ethanol Methanol tert -butyl methyl ether Ethyl tert -butyl ether Methyl tert -butyl ether sec -butyl acetate MON 88.2 94.0 95.9 96 98 98 102 99 107 RON 100.0 107.0 97.3 111 114 111 118 117 119

The motor method octane number and the research method octane number are all determined for a specific single-cylinder engine under standard test conditions and can hardly reflect the anti-knock characteristics of the fuel under the operating conditions of the vehicle. Thus, the empirical relationship of the fuel anti-knock characteristics under the operating conditions of the vehicle is described by the following equation (2): < RTI ID =

&Quot; (2) "

Anti-knock index = (RON + MON) / 2

The anti-knock index is used to reflect the average anti-knock characteristics of gasoline under normal conditions. As described above, the higher the octane number of gasoline, the better its anti-knock characteristic will be, and more clearly the power and economics of the engine will be reflected. The anti-knock index of sec -butyl acetate is 113, which is clearly higher than the anti-knock index of the other gasoline additives listed in Table 1.

3. Distillation range

Vaporability is one of the most important characteristics of gasoline. Before introducing the engine cylinder, the gasoline is first quickly gasified in the evaporator and forms a combustible gas with the air. Nominally, gasoline stays in the intake tube for only 0.005-0.05 seconds, and its evaporation time in the cylinder is only 0.02-0.03 seconds. In addition to the operating conditions and structure of the gasoline engine, in order to form a uniform and combustible mixture gas in such a short time, an even more important factor is the evaporability of the gasoline. The index reflecting the evaporability of gasoline is distillation range and saturated vapor pressure. In the Chinese standard for the quality of gasoline for automobiles, the distillation range index includes 10 vol% evaporation temperature, 50 vol% evaporation temperature, 90 vol% evaporation temperature and final boiling point (i.e., dry point).

(1) 10 vol% evaporation temperature

The 10 vol% evaporation temperature reflects the amount of fraction having a low boiling point in gasoline, which has a crucial effect on the ease of starting the gasoline engine and which is also intimately related to the tendency of air lock. The lower 10 vol% evaporation temperature means a larger amount of fraction with lower boiling point in gasoline with higher evaporability, so it is easier to start the gasoline engine at lower temperatures. However, an excessively low evaporation temperature can lead to air blockage. The Chinese standard for the quality of gasoline for automobiles requires that the 10vol% evaporation temperature should not exceed 70 ℃.

(2) 50 vol% evaporation temperature

The 50vol% evaporation temperature reflects the average evaporability of the gasoline, which is closely related to the time to temperature rising and the promptness of acceleration of the gasoline engine after startup. The lower the evaporation temperature of 50 vol% of gasoline, the larger the evaporation capacity will be at normal temperature, thereby shortening the time to the rising temperature of the gasoline engine, sensitizing the engine and making its operation smooth. If the 50vol% evaporation temperature is too high, it is necessary for the engine to be adjusted at low speed to high speed, and if the fuel supply increases sharply, most of the gasoline can not be gasified and incomplete combustion and sudden engine stop ). The Chinese standard for the quality of gasoline for automobiles requires a 50vol% evaporation temperature below 120 ℃.

(3) 90 vol% evaporation temperature and final boiling point

The 90vol% evaporation temperature and final boiling point reflect the amount of heavy fraction in gasoline. If the temperature is too high, it means that the gasoline contains too much heavy fraction and it is difficult to ensure complete evaporation and complete combustion of the gasoline under the conditions of use. This will lead to an increase in carbon deposition in the cylinder and an increase in specific fuel consumption. Moreover, the heavy gasoline fraction that has evaporated incompletely will also flow into the crankcase, diluting the lubricating oil, thereby increasing the abrasion. The Chinese standard for the quality of gasoline for automobiles requires a 90vol% evaporation temperature of 190 ° C or less and a final boiling point of 205 ° C or less.

Sec -butyl acetate has a boiling point of 112.3 ° C and has a certain volatility. When added to gasoline, the 10vol% and 50vol% evaporation temperatures of the gasoline will increase somewhat while the 90vol% evaporation temperature will decrease somewhat. There is no adverse effect on the evaporability of the gasoline composition.

4. Residual amount

The residual amount of gasoline is also an important factor directly reflected in the quality of the gasoline, reflecting the content of the heavy component of the gasoline which is most difficult to evaporate and the content of the oxidized gelatinous substance resulting from the storage process. High residual amounts will result in increased carbon deposition in the combustor and valve assembly and severe gumming in the air inlet system and carburetor throat thereby affecting normal operation of the engine. The China-III emission standard specifies that the residual amount is less than 2%. Sec -Butyl acetate does not basically have a residual amount and thus does not have a negative effect on the residual amount of the gasoline composition.

5. Saturated vapor pressure

Under certain conditions, when the gas phase and the liquid phase of the oil product in the test unit reach equilibrium, the maximum vapor pressure on the liquid surface is called the saturated vapor pressure. Saturated vapor pressure is used to assess the vaporization strength of gasoline, which is an index that measures whether or not the gasoline can easily cause air interruption in the fueling system of a gasoline engine, while, on the other hand, Can be measured. The higher the saturated vapor pressure of gasoline, the higher the evaporability and the more easily the engine can be started, but the greater the tendency of air blockage, the greater the evaporation loss. Therefore, the requirements for the saturated vapor pressure of gasoline depend on the atmospheric pressure and the ambient temperature. The China-III emission standard states that the gasoline vapor pressure does not exceed 88 kPa from November 1 to April 30 of the following year and does not exceed 72 kPa from May 1 to October 31.

When sec - butyl acetate is added to gasoline, the saturation vapor pressure of the gasoline is lowered somewhat, but the influence is small, and sec - butyl acetate - containing gasoline can still meet the requirements of Chinese domestic standards.

6. induction period

The induction period means the time period of the oil product which remains stable under the specific conditions of accelerated oxidation, which can be determined by the method specified in GB / T8018. A summary of the above method is as follows. The test sample is first filled with 68 gkPa of oxygen at 15 DEG C to 25 DEG C and then oxidized in an oxygen bomb heated to 98 DEG C to 102 DEG C. [ Pressure is recorded and decoded at specific time intervals or continuously until a turning point occurs. The time required when the test sample reaches its turning point is the induction period measured at the test temperature. From the measured induction period, the induction period can be calculated at 100 占 폚. The induction period of gasoline is measured in minutes. Obviously, if the induction period of gasoline is long, the tendency of oxidation and gumming is small. The China-III emission standard specifies that the induction period of gasoline is more than 480min. The induction period of sec -butyl acetate exceeds 600 min, thus meeting the requirements of the China-III emission standard.

7. Water-soluble acids or alkalis

Water-soluble acids are mineral acids and low-molecular organic acids. The water-soluble alkali means sodium hydroxide or the like. They are generally residues of oil refining and have a strong corrosion resistance to metals, thereby inhibiting their presence in gasoline. The content of water-soluble acid or alkali in gasoline can be determined according to GB / T259. A summary of the above method is as follows. In the test sample, the water-soluble acid or alkali is extracted with distilled water or an aqueous solution of ethanol. The methyl orange or phenolphthalein indicator is then used to confirm the color change of the extract, respectively, or the pH value is determined by a pH meter to determine the presence of a water soluble acid or alkali. The sec -butyl acetate product basically does not contain water-soluble acid and water-soluble alkali, and thus conforms to the relevant Chinese domestic standards.

8. Mechanical impurities and water

Completed gasoline purified by an oil refinery does not contain mechanical impurities and water, but gasoline is inevitably contaminated by the external environment during transport, storage and use, causing gasoline to introduce mechanical impurities and water. Mechanical impurities in the gasoline can block the vaporizer jet and the gasoline filter while worsening the wear of the vaporizer jet and the cylinder piston assembly. In gasoline, water can freeze in the winter, which can block the filter or, if severe, the fuel passageway, resulting in the disruption of the fuel supply. In addition, water can also be used to accelerate corrosion of components, dissolve antioxidants, accelerate gasoline oxidation to generate gums, result in degradation of lead tetraethyl, and create an additive such as an export agent lose effect have. A common method for identifying mechanical impurities and water in gasoline is by placing the test sample in 100 ml glass, measuring the cylinder and keeping it for 8-12 h. The test sample will remain clear, free of suspended and precipitated mechanical impurities and water. In case of disagreement, the mechanical impurities may be determined by the method specified in GB / T511, and the water may be determined by the method specified in GB / T260. sec - It is determined by tests that butyl acetate does not contain suspended or precipitated mechanical impurities and water.

9. Content of aromatic hydrocarbons

During the production of sec - butyl acetate, no aromatic hydrocarbons are produced, so the content of aromatic hydrocarbons in sec - butyl acetate is zero.

10. Olefin content

The criteria for the quality of gasoline for automobiles stipulate that the olefin content may be less than 30 vol.%. Although a small amount of olefin is produced during the production of sec - butyl acetate, the olefin content is low and does not have an impact on the increase in the olefin content of the gasoline.

11. Oxygen content

The limitation of oxygen content in automotive gasoline is primarily a consideration of calorific value. As the oxygen content in the gasoline increases, the effective combustible components in the gasoline will decrease, thus the calorific value decreases and the engine power is impaired. Additionally, if the oxygen content in the gasoline is too high, the carbon deposition in the cylinder will decrease, which causes the exhaust valve of the cylinder to lose protection of the carbon deposit and lead to more severe wear. In the dominant automotive gasoline standard, the oxygen content in gasoline may be less than 2.7 wt%. Although the sec-butyl acetate, even the oxygen content of 27.6wt%, sec-butyl acetate is a gasoline containing a gasoline from sec-it is possible to control the added amount of butyl acetate to meet the requirements of the standard for automotive gasoline.

12. Iron content

Iron devices are not used during the production of sec - butyl acetate, so the sec - butyl acetate product does not contain iron.

13. Existent gum

It is commonly used to describe the tendency of gasoline to form deposits in real black inflow pipelines and inlet valves, which is a gasoline evaporation residue that is insoluble in n -heptane determined under specific conditions. This can be determined according to GB / T8019. A summary of the above method is as follows. The known amount of fuel is evaporated under conditions of controlled temperature and conditioned air. n - is the residue after each measurement extracted by the heptane-extraction before and by the n-heptane. The result obtained is reported as mg / 100 ml. In this way, the actual blackness of the gasoline is determined. The China-III emission standard specifies that the actual sludge of gasoline does not exceed 5mg / 100ml when leaving the factory. sec -butyl acetate is only 0.5-1.2 mg / 100 ml black, so it meets the requirements of the China-III emission standard.

14. Doctor test

The doctor's test relates to a test in which sodium plumbite is reacted with a light oil product in the presence of sublimed sulfur to identify mercaptans or hydrogen sulfides in the oil, Lt; RTI ID = 0.0 > T0174. ≪ / RTI > The methodological principle of the doctor test is as follows. 10 ml of test sample and 5 ml of sodium zinc stearate solution are placed in a 50 ml measuring cylinder with a ground stopper and shaken vigorously. If the test sample contains hydrogen sulphide, black lead sulphide will be produced. If not, then a small amount of pure and dry sublimed sulfur powder is added and the mixture is shaken again. If the test sample contains mercaptans, the color of the oil layer and the sulfur film will change after a series of reactions. Sec -butyl acetate passed the above-mentioned doctor's test.

15. Copper strip corrosion (50 ° C, 3h)

Under certain conditions, the copper corrosion behavior of the oil product is tested and verified whether the gasoline contains sulfur and active sulfides. This is determined by the method embodied in GB / T5096. A summary of the above method is as follows. The polished copper strip is impregnated with a specific amount of the test sample, heated to the specified temperature according to the product standard, and maintained at that temperature for a specified time. When the test cycle is over, the copper strips are taken out and compared with standard color palettes of corrosion to determine corrosion level after cleaning. There are four levels of the standard color palette: level 1 means some color change; Level 2 refers to a mid-color change; Level 3 means a severe color change; Level 4 means corrosion. Copper strip corrosion (50 ° C, 3h) of gasoline embodied in the China-III Emission Standard does not exceed level 1. Copper strip corrosion of sec -butyl acetate is 1a, so this is in line with the requirements of the China-III emission standard.

16. Sulfur Content

Sulfur content refers to the content of sulfur and its derivatives (such as hydrogen sulfide, mercaptan and disulfide) in gasoline and is expressed in percent by weight. In the case of sulfur and its derivatives in gasoline meeting water or steam, sulfurous acid and sulfuric acid will be produced. Under the conditions of gasoline combustion, this tendency becomes stronger. Sulfuric acid and sulfuric acid are very corrosive to metals. In addition, sulfur can also reduce the octane number of gasoline and the perceptibility of gasoline with lead tetraethyl (i.e., weaken the degree of increase in octane number of gasoline by the addition of lead tetraethyl). Therefore, the China-III emission standard specifies that the sulfur content should not exceed 150 ppm. The sulfur content can be determined by the method specified in GB / T380.

The sulfur content of sec - butyl acetate is very low. When the sulfur content is less than 3 ppm, it is very suitable for producing clean gasoline fuel with little or no sulfur.

17. Methanol content

Methanol is not produced during the production of sec - butyl acetate, and the raw material is also methanol - free. Thus, the content of methanol in the sec - butyl acetate product is zero.

18. Benzene content

Benzene is a very harmful chemical. Automotive gasoline standards specify that the content of benzene should not exceed 1.0 vol%. The benzene content can be determined by the method specified in SH / T0693. If there is an objection to the determination of the benzene content, the results determined by the method specified in SH / T0713 may be used. According to the determination results, the sec -butyl acetate product does not contain benzene.

19. Manganese content

The manganese content refers to the total content of manganese present in the form of methylcyclopentadienyl manganese tricarbonyl (MMT) in gasoline. Other types of manganese-containing additives are not added. The China-III emission standard specifies that the manganese content, as determined by the method specified in SH / T0711, shall not exceed 0.016 g / l. Beijing Gasoline Emission Standard C specifies that the manganese content does not exceed 0.006 g / l. According to the determination result, the sec -butyl acetate product does not contain manganese.

The above analytical results show that sec -butyl acetate has an excellent performance index and is an excellent gasoline additive.

In the gasoline composition according to the application of the present invention, based on the total amount of the gasoline composition, the sec -butyl acetate may have an amount of 1-30 wt%. When the content of sec -butyl acetate in the gasoline composition is less than 1 wt%, it is difficult to achieve the desired effect of raising the anti-knock index and octane number of gasoline. When the content of sec -butyl acetate in the gasoline composition exceeds 30 wt%, the gasoline composition is more corrosive to the rubber washer and the gasoline engine of the gasoline engine at the fuel fill pipe and fuel gun of the gas station would. The sec -butyl acetate is preferably present in an amount of from 2 to 10 wt%, based on the total amount of the gasoline composition, from the viewpoint of controlling the oxygen content of the gasoline composition and further reducing the corrosiveness to the rubber product contacting the gasoline composition .

The raw gasoline in the gasoline composition according to the present invention may be any of various types of raw gasoline popular in the art without any particular limitation. Specifically, the raw gasoline is a gasoline No. 1. 90, gasoline No. 93, or gasoline No. 97; Or an oil refinery or chemical plant such as catalytically cracked gasoline, alkylated gasoline, reformed gasoline, modified raffinate gasoline, modified raffinate oil, hydrogenated coker gasoline, straight run gasoline or light hydrocarbon C5 Such as a gasoline fraction from < RTI ID = 0.0 > a < / RTI > The light hydrocarbon C5 means a wide variety of hydrocarbons containing five carbon atoms as well as mixtures thereof.

The raw gasoline in the gasoline composition according to the present invention may also contain one or more selected from the group consisting of ether-based compounds, alcohol-based compounds and aromatic hydrocarbons. Based on the total amount of the gasoline composition, the total amount of the ether-based compound, the alcohol-based compound and the aromatic hydrocarbon is 0.02-33 wt%.

The aromatic hydrocarbons can be various kinds of aromatic hydrocarbons that are popular in the art without any particular limitation. Preferably, the aromatic hydrocarbon is selected from the group consisting of benzene, toluene, ethylbenzene, xylene (including o -xylene, m -xylene and p -xylene), trimethylbenzene (including all isomers of trimethylbenzene) and C10 aromatic hydrocarbon One or more selected from the group consisting of The C10 aromatic hydrocarbon means an aromatic hydrocarbon having 10 carbon atoms as well as a mixture thereof. Based on the total amount of the gasoline composition, the aromatic hydrocarbon preferably has a content of 0.02-33 wt%. From the viewpoint of environmental protection, based on the total amount of the gasoline composition, the benzene preferably has a content of 0.01-0.88 wt%.

The ether-based compounds may be various types of ethers well known to those skilled in the art. Preferably, the ether-based compound is at least one selected from the group consisting of methyl tert -butyl ether, ethyl tert -butyl ether, tert -amyl methyl ether and dibutyl ether. Preferably, based on the total amount of the gasoline composition, the ether-based compound has an amount of 0.1-15 wt%.

The alcohol-based compounds may be various alcoholic compounds that are popular in the art. Preferably, the alcohol-based compound is at least one selected from the group consisting of methanol, ethanol, n -butanol, sec -butanol, and tert -butanol. Based on the total amount of the gasoline composition, the alcohol-based compound preferably has a content of 0.02-10 wt%.

The performance index of the gasoline compositions according to the present invention is consistent with the international automotive gasoline standard III (GB17930-2006) (III) (Table 2). The gasoline composition has a high octane number and is environmentally friendly without contamination.

Item Quality index No. 90 No. 93 No. 97 Research Method Octane Price (RON) ≥ 90 ≥93 ≥97 Anti-knock index (RON + MON) / 2 ≥85 ≥88 / Lead content (g / ℓ) ≤0.005 10vol% Evaporation temperature (占 폚) ≤70 50vol% Evaporation temperature (占 폚) ≤120 90vol% Evaporation temperature (占 폚) ≤190 Final boiling point (캜) ≤205 Residue (vol%) ≤2 Vapor pressure (from November 1 to April 30) (kPa) Δ88 Vapor pressure (May 1 to October 31) (kPa) ≤72 Induction period (min) ≥480 Soluble acid or alkali Not detected Mechanical impurities and water Not detected Aromatic hydrocarbon content (vol%) ≤ 40 Olefin content (vol%) ≤30 Oxygen content (wt%) ≤2.7 Iron content (g / ℓ) ? 0.01 Existent gum (mg / 100 ml) ≤ 5 Doctor Exam Pass Copper strip corrosion (50 ° C, 3h) (level) ≤1 Sulfur content (wt%) ≤0.015 Methanol content (wt%) 0.3 Benzene content (vol%) ? 1.0 Manganese content (g / l) 0.016

The present invention also provides a process for preparing the gasoline composition comprising the step of adding sec -butyl acetate to the feedstock gasoline, based on the total amount of the gasoline composition, wherein the sec -butyl acetate is present in the range of 1-30 wt% It is added in an amount to make the content of the raw material and the content of the gasoline range 70-99wt% of butyl acetate - sec on gasoline composition.

In the present invention, the method for adding sec -butyl acetate to the raw material gasoline is not particularly limited. This can be any of the methods known to those skilled in the art so long as the raw gasoline and sec -butyl acetate are uniformly mixed and can ensure that the content of sec -butyl acetate is within the stated range. For example, a predetermined amount of sec -butyl acetate may be added to the feed gasoline in a stirred mixer; Or sec -butyl acetate and raw gasoline can be simultaneously added to the mixer and can be homogeneously stirred.

According to the method for producing a gasoline composition of the present invention, based on the total amount of the gasoline composition, the sec -butyl acetate is added in an amount to make the content of sec -butyl acetate in the gasoline composition in the range of 1-30 wt%. Preferably, based on the total amount of the gasoline composition, the sec -butyl acetate is added in an amount to make the sec -butyl acetate content in the gasoline composition in the range of 2-10 wt%.

Since sec - butyl acetate can clearly improve the overall performance of gasoline, especially the octane number, and there is no strict requirement for the purity of sec - butyl acetate itself, the present invention has no particular limitation on the source of sec - butyl acetate. This can be any commercial sec -butyl acetate. From the viewpoint of lowering the content of olefins in the gasoline composition and raising the octane number of the gasoline composition, the purity of sec -butyl acetate is preferably 80 wt% or more, preferably 90 wt% or more, more preferably 97.5 wt% Preferably 99 wt% or more. sec - if the purity of the butyl acetate is within the above range, not only the content of olefins in the gasoline composition consistent with China -III emission standards, and the octane number of the gasoline composition meets the requirements of use, the gasoline composition The cost can be lowered.

The method for producing a gasoline composition according to the present invention may further include adding at least one selected from the group consisting of ether-based compounds, alcohol-based compounds and aromatic hydrocarbons to the raw material gasoline. Based on the total amount of the gasoline composition, the total amount of the ether-based compound, the alcohol-based compound and the aromatic hydrocarbon in the gasoline composition is 0.02-33 wt%.

The present invention is not particularly limited in the order of addition of sec -butyl acetate, ether-based compounds, alcohol-based compounds and aromatic hydrocarbons. The step of adding at least one selected from the group consisting of an ether-based compound, an alcohol-based compound and an aromatic hydrocarbon to the raw gasoline and the step of adding sec -butyl acetate to the raw gasoline realize the object of the present invention in various orders .

The amount of the ether-based compound, the alcohol-based compound and the aromatic hydrocarbon is not particularly limited, and the amount of the ether-based compound, the alcohol-based compound and the aromatic hydrocarbon added to the gasoline composition If it is 0.02-33 wt% based on the total amount, it may be a conventional amount in the art. In any case, in view of environmental protection and cost reduction, the ether-based compound is added in an amount in the range of 0.1-15 wt% to make the total content of ether-based compound in the gasoline composition, and the alcohol- To 10 wt%, and the aromatic hydrocarbon is added in an amount to make the total content of aromatic hydrocarbons in the gasoline composition in the range of 0.02 to 33 wt%. Based on the total amount of the gasoline composition, in terms of environmental protection, benzene in the aromatic hydrocarbon is added in an amount to make the total content of benzene in the gasoline composition in the range of 0.01-0.88 wt%.

The types of ether-based compounds, alcohol-based compounds and aromatic hydrocarbons added to the gasoline composition have been described above and thus are omitted herein.

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

In the following embodiment, the test is carried out by the method specified in Chinese national standard GB17930-2006 (III).

Example 1

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd, and has a purity of 97.8 wt%, and its physical and chemical parameters are shown in Table 3. 2 parts by weight of sec -butyl acetate is added to 98 parts by weight of raw gasoline (hydrogenated gasoline from catalytic cracking provided by Sinopec Changling Branch) and mixed uniformly to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate is 2 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are listed in Table 3. < tb >< TABLE >

Example 2

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline and sec -butyl acetate used in this example are the same as those in Example 1. [ 5.1 parts by weight of sec -butyl acetate are added to 94.9 parts by weight of raw gasoline and homogeneously mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 3. < tb >< TABLE >

Example 3

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline and sec -butyl acetate used in this example are the same as those in Example 1. [ 10 parts by weight of sec -butyl acetate is added to 90 parts by weight of raw gasoline and mixed uniformly to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 9.8 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 3. < tb >< TABLE >

Example 4

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline and sec -butyl acetate used in this example are the same as those in Example 1. [ 30.7 parts by weight of sec -butyl acetate is added to 69.3 parts by weight of raw gasoline and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 30 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 3. < tb >< TABLE >

Comparative Example 1

The raw gasoline and sec -butyl acetate used were the same as in Example 1. 0.5 parts by weight of sec -butyl acetate is added to 99.5 parts by weight of raw gasoline and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 0.5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 3. < tb >< TABLE >

Comparative Example 2

The raw gasoline and sec -butyl acetate used were the same as in Example 1. 35.8 parts by weight of sec -butyl acetate is added to 64.2 parts by weight of raw gasoline and mixed well to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 35 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 3. < tb >< TABLE >

Analysis item Test result catalyst
Gasoline sec - butyl
acetate Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Density (kg / m3) 722.0 860.0 724.7 728.8 735.5 762.5 722.2 770.3 10vol% Evaporation temperature (占 폚) 40.5 - 40.9 42.5 44.5 52.5 40.6 55.0 50vol% Evaporation temperature (占 폚) 86.7 - 87.0 90.5 93.5 97.5 86.8 99.8 90vol% Evaporation temperature (占 폚) 154.3 - 153.6 152.0 150.0 146.8 154.2 144.5 Final boiling point (캜) 191.0 - 189.6 187.5 185.0 181.2 190.8 178.6 Residue (vol%) 1.5 - 1.5 1.5 1.5 1.5 1.5 1.5 Total outflow (vol%) 97.5 - 97.5 97.5 97.5 97.5 97.5 97.5 Aromatic hydrocarbons (vol%) 26.5 0 26.0 25.2 23.9 18.6 26.4 17.2 Olefin (vol%) 31.9 2.0 30.7 30.4 28.9 22.9 31.7 21.4 Doctor Exam Pass Pass Pass Pass Pass Pass Pass Pass Total sulfur (wt%) 0.016 0 0.016 0.015 0.014 0.011 0.016 0.010 MON 81.4 104 81.8 82.4 83.6 87.0 81.5 87.5 RON 90.4 117 91.0 91.6 93.0 97.5 90.5 98.0 Anti-knock index 85.9 110.5 86.4 87.0 88.3 92.3 86.0 92.8 Soluble acid or alkali Not detected Not detected Not detected Not detected Not detected Not detected Not detected Not detected Vapor pressure (kPa) 68.5 4.2 67.0 65.0 63.0 50.5 68.2 49.0 Oxygen content (wt%) 0.1 27.0 0.6 1.4 2.7 8.2 0.2 9.5 Methanol content (wt%) 0.01 0 0.01 0.01 0.01 0.01 0.01 0.01 Benzene content (vol%) 0.68 0 0.67 0.65 0.61 0.48 0.68 0.44 Real gum (mg / 100 ml) 3.0 0.7 2.95 2.89 2.77 2.31 2.99 2.2 Copper strip corrosion 1a 1a 1a 1a 1a 1a 1a 1a Induction period (min) 560 > 600 > 600 > 600 > 600 > 600 > 600 > 600

The results in Table 3 show that the gasoline composition containing sec -butyl acetate at a content of 2-30 wt% has a higher octane number and an anti-knock index.

Example 5

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline used in the present embodiment is the same as that of the first embodiment. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and has a purity of 98.5 wt%, and its performance index is shown in Table 4. 8.1 parts by weight of sec -butyl acetate is added to 91.9 parts by weight of the raw gasoline and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 8 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 4.

Comparative Example 3

The raw gasoline used in this comparative example is the same as that of Example 1. The methyl tert -butyl ether used in this comparative example was purchased from Shanghai Yuanjing Chemicals Co., Ltd. and had a purity of 98.5 wt%. 8.1 parts by weight of methyl tert -butyl ether is added to 91.9 parts by weight of raw gasoline and homogeneously mixed to obtain a gasoline composition containing methyl tert -butyl ether. In the obtained gasoline composition, the content of methyl tert -butyl ether was 8 wt%. The technical indices of the obtained gasoline compositions containing methyl tert -butyl ether are shown in Table 4. < tb >< TABLE >

Comparative Example 4

The raw gasoline used in this comparative example is the same as that of Example 1. The n -butyl acetate used in this comparative example was purchased from Wuxi Baichuan Chemical Industry Co., Ltd. and has a purity of 98.5 wt%. 8.1 parts by weight of n -butyl acetate is added to 91.9 parts by weight of raw gasoline and uniformly mixed to obtain a gasoline composition containing n -butyl acetate. In the obtained gasoline composition, the content of n -butyl acetate was 8 wt%. The technical indices of the obtained gasoline compositions containing n -butyl acetate are shown in Table 4.

Comparative Example 5

The raw gasoline used in this comparative example is the same as that of Example 1. The tert -butyl acetate used in this comparative example was purchased from Shanghai Cyclobase Fine-Chemical Co., Ltd. and has a purity of 98.5 wt%. 8.1 parts by weight of tert -butyl acetate are added to 91.9 parts by weight of raw gasoline and homogeneously mixed to obtain a gasoline composition containing tert -butyl acetate. In the obtained gasoline composition, the content of tert -butyl acetate was 8 wt%. The technical indices of the obtained gasoline compositions containing tert -butyl acetate are shown in Table 4.

Analysis item Test result catalyst
Gasoline sec -butyl acetate Methyl tert -butyl ether Example 5 Comparative Example 3 Comparative Example 4 Comparative Example 5 Density (kg / m3) 722.0 862.0 739.5 733.0 723.4 734.4 736.2 10 vol%
Evaporation temperature (℃) 40.5 - - 44.2 41.5 44.5 43.6 50 vol%
Evaporation temperature (℃) 86.7 - - 91.0 83.8 91.5 88.5 90 vol%
Evaporation temperature (℃) 154.3 - - 150.4 146.2 150.9 149.2 Final boiling point
(° C) 191.0 - - 185.4 180.2 186.0 183.2 Residue (vol%) 1.5 - 1.5 1.5 1.5 1.5 1.5 Total outflow (vol%) 97.5 - 97.5 97.5 97.5 97.5 97.5 Aromatic hydrocarbons (vol%) 26.5 0 0 24.4 24.4 24.4 24.4 Olefin (vol%) 31.9 1.2 0.5 29.4 29.4 29.3 29.3 Doctor Exam Pass Pass Pass Pass Pass Pass Pass Total sulfur (wt%) 0.016 0 0.013 0.015 0.016 0.015 0.015 MON 81.4 106 99 83.4 83.0 82.5 84.0 RON 90.4 119 117 93.0 92.8 92.0 94.0 Anti-knock index 85.9 112 109 88.2 87.9 87.3 89.0 receptivity
Acid or alkali Not detected Not detected Not detected Not detected Not detected Not detected Not detected Vapor pressure (kPa) 68.5 4.6 55 64.8 67.8 63.5 - Oxygen content (wt%) 0.1 27.2 18.2 2.3 1.5 2.3 2.3 Methanol content (wt%) 0.01 0 0.08 0.01 0.02 0.01 0.01 Benzene content (vol%) 0.68 0 0 0.63 0.63 0.63 0.63 Real gum (mg / 100 ml) 3.0 0.6 1.0 2.8 2.8 2.8 3.0 Copper strip
corrosion 1a 1a 1a 1a 1a 1a 1a Induction period
(min) 560 > 600 > 600 > 600 > 600 > 600 > 560 but <600

The results in Table 4 show that compared to a gasoline composition containing methyl tert -butyl ether and a gasoline composition containing n -butyl acetate, the gasoline composition containing sec -butyl acetate has a higher octane number and an anti-knock index . Compared to gasoline compositions containing tert -butyl acetate, gasoline compositions containing sec -butyl acetate have fewer substantive gums and longer induction periods. Further, sec - the density of the gasoline composition containing the butyl acetate is tert - lower than the gasoline composition containing the butyl acetate, and thus, sec - butyl acetate is more suitable for blending with gasoline.

Example 6

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example is purchased from Hunan Zhongchuang Chemical Co., Ltd. and has a purity of 80 wt%. 6.3 parts by weight of sec -butyl acetate are added to 93.7 parts by weight of raw gasoline (commercial gasoline No. 90) and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 5. &lt; tb &gt;&lt; TABLE &gt;

Example 7

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline used in this embodiment is the same as that of the sixth embodiment. The sec -butyl acetate used in this example is purchased from Hunan Zhongchuang Chemical Co., Ltd. and has a purity of 90 wt%. 5.6 parts by weight of sec -butyl acetate are added to 94.4 parts by weight of the raw gasoline and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 5. &lt; tb &gt;&lt; TABLE &gt;

Example 8

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline used in this embodiment is the same as that of the sixth embodiment. The sec -butyl acetate used in this example is purchased from Hunan Zhongchuang Chemical Co., Ltd. and has a purity of 97.5 wt%. 5.1 parts by weight of sec -butyl acetate are added to 94.9 parts by weight of raw gasoline and mixed well to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 5. &lt; tb &gt;&lt; TABLE &gt;

Example 9

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The raw gasoline used in this embodiment is the same as that of the sixth embodiment. The sec -butyl acetate used in this example is purchased from Hunan Zhongchuang Chemical Co., Ltd. and has a purity of 99 wt%. 5.1 parts by weight of sec -butyl acetate are added to 94.9 parts by weight of raw gasoline and mixed well to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%. The technical indices of the obtained gasoline compositions containing sec -butyl acetate are shown in Table 5. &lt; tb &gt;&lt; TABLE &gt;

Analysis item Test result Gasoline No. 90 Example 6 Example 7 Example 8 Example 9 Density (kg / m3) 702.3 709.1 709.8 710.4 710.5 10vol% Evaporation temperature (占 폚) 39.5 41.0 42.5 43.8 44.2 50vol% Evaporation temperature (占 폚) 79.5 80.3 82.0 83.5 83.8 90vol% Evaporation temperature (占 폚) 136.5 135.9 135.0 134.5 134.1 Final boiling point (캜) 175.6 171.2 169.5 168.8 168.4 Residue (vol%) 1.5 1.5 1.5 1.5 1.5 Total outflow (vol%) 97.5 97.5 97.5 97.5 97.5 Aromatic hydrocarbons (vol%) 32.1 30.5 30.5 30.5 30.5 Olefin (vol%) 15.4 15.6 15.1 14.7 14.7 Doctor Exam Pass Pass Pass Pass Pass Total sulfur (wt%) 0.016 0.015 0.015 0.015 0.015 MON 81.0 81.4 82.0 82.3 82.5 RON 90.2 90.7 91.2 91.5 91.7 Anti-knock index 85.6 86.1 86.6 86.9 87.1 Soluble acid or alkali Not detected Not detected Not detected Not detected Not detected Vapor pressure (kPa) 72.5 69.0 69.2 69.4 69.5 Oxygen content (wt%) 0.5 1.6 1.7 1.8 1.9 Methanol content (wt%) 0.01 0.01 0.01 0.01 0.01 Benzene content (vol%) 0.52 0.49 0.49 0.49 0.49 Real gum (mg / 100 ml) 2.5 2.4 2.4 2.4 2.4 Copper strip corrosion 1a 1a 1a 1a 1a Induction period (min) > 600 > 600 > 600 > 600 > 600

In Table 5 results indicate that the method for producing a gasoline composition according to the present invention, sec-butyl acetate shows that it is acceptable - no particular limitation is imposed on the purity level of the butyl acetate, sec having a purity level of more than 80wt%. Thus, the process for producing a gasoline composition according to the present invention is very flexible with respect to raw materials.

Example 10

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and has a purity of 99.5 wt%, and its octane number and anti-knock index are shown in Table 6. 8 parts by weight of sec -butyl acetate are added to 92 parts by weight of raw gasoline (CNOOC and light hydrocarbon C5 provided by Shell Petrochemicals Company Limited) and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 8 wt%. The octane number and anti-knock index of the obtained gasoline compositions containing sec -butyl acetate are listed in Table 6. &lt; tb &gt;&lt; TABLE &gt;

Example 11

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and has a purity of 80 wt%, and its octane number and anti-knock index are shown in Table 6. 37.5 parts by weight of sec -butyl acetate are added to 62.5 parts by weight of raw gasoline (straight run gasoline provided by Sinopec Changling Branch) and homogeneously mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 30 wt%. The octane number and anti-knock index of the obtained gasoline compositions containing sec -butyl acetate are listed in Table 6. &lt; tb &gt;&lt; TABLE &gt;

Example 12

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and had a purity of 90 wt%, and its octane number and anti-knock index are shown in Table 6. 16.7 parts by weight of sec -butyl acetate are added to 83.3 parts by weight of raw gasoline (modified raffinate oil provided by Sinopec Shanghai Branch) and homogeneously mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 15 wt%. The octane number and anti-knock index of the obtained gasoline compositions containing sec -butyl acetate are listed in Table 6. &lt; tb &gt;&lt; TABLE &gt;

Example 13

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and has a purity of 95 wt%, and its octane number and anti-knock index are shown in Table 6. 2.1 parts by weight of sec -butyl acetate is added to 97.9 parts by weight of 97.9 parts by weight of raw gasoline (modified gasoline provided by Sinopec Changling Branch) and uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate is 2 wt%. The octane number and anti-knock index of the obtained gasoline compositions containing sec -butyl acetate are listed in Table 6. &lt; tb &gt;&lt; TABLE &gt;

Analysis item MON RON Anti-knock index


exam


result


sec -butyl acetate 99.5% 107 119 113 Light hydrocarbon C5 72 83 77.5 Example 10 76.6 87.7 82.2 sec - butyl acetate 80% 90 101 95.5 Straight run gasoline 55 56 55.5 Example 11 69.5 74 71.8 sec - butyl acetate 90% 98 110 104 Modified raffinate oil 68 70 69 Example 12 74.5 77.5 76 sec - butyl acetate 95% 103 115 109 Reformed gasoline 98 105 101.5 Example 13 98.2 105.2 101.7

The results in Table 6 show that the process for preparing the gasoline composition according to the present invention can be used to raise the octane number of raw gasoline from various sources and has a good broad spectrum.

Example 14

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example was purchased from Hunan Zhongchuang Chemical Co., Ltd., and has a purity of 95 wt%, and its physical and chemical parameters are shown in Table 7. 10.5 parts by weight of sec -butyl acetate and 10 parts by weight of toluene (purity 98.5 wt%, purchased from Sinopec Changling Refinery) were added to 79.5 parts by weight of raw gasoline (hydrogenated gasoline from catalytic cracking purchased from Sinopec Changling Branch) , And uniformly mixed to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 10 wt%, and the content of toluene was 10 wt%. The technical indices of the obtained gasoline compositions are shown in Table 7.

Comparative Example 6

The gasoline composition comprises 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 gasoline, and the mixture was homogeneously mixed to obtain a gasoline composition. The technical indices of the obtained gasoline compositions are shown in Table 7.

Example 15

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example and the raw material gasoline are the same as those in Example 14. [ 2.1 parts by weight of sec -butyl acetate and 2 parts by weight of methyl tert -butyl ether (purity 98.5 wt%, purchased from Shanghai Yuanjing Chemicals Co., Ltd.) were added to 95.9 parts by weight of raw material gasoline, To obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 2 wt%, and the content of methyl tert -butyl ether was 2 wt%. The technical indices of the obtained gasoline compositions are shown in Table 7.

Comparative Example 7

The gasoline composition comprises sec - butyl Acetate was not added, and 4.1 parts by weight of methyl tert -butyl ether was added to 95.9 parts by weight of the raw gasoline, and the mixture was homogeneously mixed to obtain a gasoline composition. The technical indices of the obtained gasoline compositions are shown in Table 7.

Example 16

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example and the raw gasoline are the same as those in Example 14. 5.3 parts by weight of sec -butyl acetate and 3 parts by weight of ethanol (purchased from Henan Tianguan Fuel Ethanol Co., Ltd., purity: 98.5 wt%) were added to 91.7 parts by weight of raw material gasoline and uniformly mixed, A gasoline composition is obtained. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt% and the content of ethanol was 3 wt%. The technical indices of the obtained gasoline compositions are shown in Table 7.

Comparative Example 8

The gasoline composition comprises sec - butyl Except that no acetate was added and 8.3 parts by weight of ethanol was added to 91.7 parts by weight of raw gasoline, and the mixture was homogeneously mixed to obtain a gasoline composition. The technical indices of the obtained gasoline compositions are shown in Table 7.

Analysis item Test result catalyst
Gasoline sec - butyl
acetate Example
14 Example
15 Example
16 Comparative Example
6 Comparative Example 7 Comparative Example
8 Density (kg / m3) 722.0 855.5 750.5 725.2 731.1 751.7 722.7 727.6 10vol% Evaporation temperature (占 폚) 40.5 - 45.0 40.0 43.2 44.8 39.5 41.3 50vol% Evaporation temperature (占 폚) 86.7 - 95.0 88.0 88.5 94.5 87.2 86.5 90vol% Evaporation temperature (占 폚) 154.3 - 152.0 153.0 150.2 151.0 151.5 147.6 Final boiling point (캜) 191.0 - 187.0 189.0 182.3 185.5 187.0 178.8 Residue (vol%) 1.5 - 1.5 1.5 1.5 1.5 1.5 1.5 Total outflow (vol%) 97.5 - 97.5 97.5 97.5 97.5 97.5 97.5 Aromatic hydrocarbons (vol%) 26.5 0 31.1 25.4 24.3 41.6 25.4 24.3 Olefin (vol%) 31.9 4.6 26.4 30.8 29.5 30.6 25.4 29.5 Doctor Exam Pass Pass Pass Pass Pass Pass Pass Pass Total sulfur (wt%) 0.016 0 0.013 0.015 0.015 0.013 0.016 0.015 MON 81.4 102 85.0 82.9 83.2 85.5 82.0 82.5 RON 90.4 115 94.5 91.2 92.3 95.0 91.0 92.0 Anti-knock index 85.9 108.5 89.8 87.1 87.8 90.3 86.5 87.3 Soluble acid or alkali Not detected Not detected Not detected Not detected Not detected Not detected Not detected Not detected Vapor pressure (kPa) 68.5 4.2 60.0 66.0 63.4 55.2 66.5 64.0 Oxygen content (wt%) 0.1 26.2 2.5 0.86 2.3 0.1 0.84 3.0 Methanol content (wt%) 0.01 0 0.01 0.01 0.01 0.009 0.013 0.008 Benzene content (vol%) 0.68 0 0.54 0.68 0.63 0.54 0.68 0.63 Real gum (mg / 100 ml) 3.0 1.2 2.5 2.9 2.8 2.4 2.9 2.8 Copper strip corrosion 1a 1a 1a 1a 1a 1a 1a 1a Induction period (min) 560 > 600 > 600 > 600 > 600 > 600 > 600 > 600

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

Example 17

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example and the raw gasoline are the same as those in Example 5. [ 5 parts by weight of sec -butyl acetate, 5 parts by weight of ethyl tert -butyl ether (purity 98.5 wt% purchased from Guangzhou Weibo Chemical Co., Ltd.), 20 parts by weight of xylene (purchased from Sinopec Changling Refinery, %) And 2 parts by weight of tert -butanol (purity: 98.5 wt%, purchased from Shanghai Xingao Chemical Reagent Co., Ltd.) were added to 68 parts by weight of raw gasoline respectively and mixed uniformly to obtain the gasoline composition of the present invention . In the gasoline composition obtained, the content of sec -butyl acetate was 5 wt%, the content of ethyl tert -butyl ether was 5 wt%, the content of xylene was 20 wt%, and the content of tert -butanol was 2 wt%. The technical indices of the obtained gasoline compositions are shown in Table 8.

Comparative Example 9

except that sec -butyl acetate was not added, 10 parts by weight of ethyl tert -butyl ether, 20 parts by weight of xylene and 2 parts by weight of tert -butanol were added to 68 parts by weight of raw gasoline, respectively And homogeneously mixed to obtain a gasoline composition. In the obtained gasoline composition, the content of ethyl tert -butyl ether was 10 wt%, the content of xylene was 20 wt%, and the content of tert -butanol was 2 wt%. The technical indices of the obtained gasoline compositions are shown in Table 8.

Example 18

The present examples are intended to illustrate the gasoline compositions provided by the present invention and their preparation methods. The sec -butyl acetate used in this example and the raw gasoline are the same as those in Example 5. 5 parts by weight of sec -butyl acetate, 1 part by weight of methyl tert -butyl ether (purity 98.5 wt% purchased from Shanghai Yuanjing Chemicals Co., Ltd.) and 10 parts by weight of xylene (purchased from Sinopec Changling Refinery, %) Are respectively added to 84 parts by weight of raw gasoline and mixed uniformly to obtain the gasoline composition of the present invention. In the obtained gasoline composition, the content of sec -butyl acetate was 5 wt%, the content of methyl tert -butyl ether was 1 wt%, and the content of xylene was 1 wt%. The technical indices of the obtained gasoline compositions are shown in Table 8.

Comparative Example 10

except that sec -butyl acetate was not added, 6 parts by weight of methyl tert -butyl ether and 10 parts by weight of xylene were added to 84 parts by weight of raw gasoline, and they were uniformly mixed To obtain a gasoline composition. In the obtained gasoline composition, the content of methyl tert -butyl ether was 6 wt%, and the content of xylene was 10 wt%. The technical indices of the obtained gasoline compositions are shown in Table 8.

Analysis item Test result catalyst
Gasoline sec - butyl
acetate Example 17 Example 18 Comparative Example
9 Comparative Example
10 Density (kg / m3) 722.0 862.0 759.4 742.5 753.8 736.9 10vol% Evaporation temperature (占 폚) 40.5 - 55.0 52.5 53.0 50.5 50vol% Evaporation temperature (占 폚) 86.7 - 94.8 92.0 92.8 90.5 90vol% Evaporation temperature (占 폚) 154.3 - 143.0 149.5 141.0 147.0 Final boiling point (캜) 191.0- - 172.3 180.5 169.8 177.5 Residue (vol%) 1.5 - 1.5 1.5 1.5 1.5 Total outflow (vol%) 97.5 - 97.5 97.5 97.5 97.5 Aromatic hydrocarbons (vol%) 26.5 0 38.0 32.3 38.0 32.3 Olefin (vol%) 31.9 1.2 21.8 27.0 21.8 26.8 Doctor Exam Pass Pass Pass Pass Pass Pass Total sulfur (wt%) 0.016 0 - - - - MON 81.4 106 87.5 84.5 86.5 84.0 RON 90.4 118.5 98.0 94.0 97.0 93.5 Anti-knock index 85.9 112.3 92.8 89.3 91.8 88.8 Soluble acid or alkali Not detected - Not detected Not detected Not detected Not detected Vapor pressure (kPa) 68.5 4.6 48.6 60.8 49.7 62.5 Oxygen content (wt%) 0.1 27.2 2.6 1.6 2.1 1.2 Methanol content (wt%) 0.01 0 0.01 0.01 0.01 0.013 Benzene content (vol%) 0.68 0 0.46 0.6 0.46 0.6 Real gum (mg / 100 ml) 3.0 0.6 2.3 2.8 2.3 3.0 Copper strip corrosion 1a 1a 1a 1a 1a 1a Induction period (min) 560 > 600 > 600 > 600 > 600 > 600

The results in Table 8 show that sec -butyl acetate can be used in combination with other additives, and gasoline compositions containing sec -butyl acetate have higher octane number and anti-knock index.

Claims (12)

Based gasoline having a content of 90-98 wt% and sec -butyl acetate having a content of 2-10 wt% based on the total amount of the gasoline composition,
Wherein the raw gasoline comprises at least one selected from the group consisting of an ether-based compound, an alcohol-based compound and an aromatic hydrocarbon in an amount of 0.02-33 wt% based on the total amount of the gasoline composition,
Wherein the aromatic hydrocarbon is at least one selected from the group consisting of benzene, toluene, ethylbenzene, xylene, trimethylbenzene and C10 aromatic hydrocarbons, the aromatic hydrocarbon having an amount of 0.02-33 wt% based on the total amount of the gasoline composition,
The ether-based compound is at least one selected from the group consisting of methyl tert -butyl ether, ethyl tert -butyl ether, tert -amyl methyl ether and dibutyl ether, and based on the total amount of the gasoline composition, Has a content of 0.1-15 wt%
Wherein the alcohol-based compound is selected from the group consisting of methanol, ethanol, n -butanol, sec -butanol and tert -butanol, and based on the total amount of the gasoline composition, the alcohol- &Lt; / RTI &gt; by weight. delete delete delete delete delete Sec the raw gasoline - comprising the step of adding the butyl acetate, based on the total amount of the gasoline composition, the sec-butyl acetate in the gasoline composition in the range of 2-10wt% sec-content and 90-98wt% of butyl acetate Of the total amount of the raw gasoline,
The method includes adding at least one selected from the group consisting of an ether-based compound, an alcohol-based compound and an aromatic hydrocarbon to the raw gasoline based on the total amount of the gasoline composition, wherein the ether- Based compounds, aromatic hydrocarbons is 0.02-33 wt%
Based compound is added to the gasoline composition in an amount in the range of 0.1 to 15 wt% to make the total content of the ether-based compound, and the alcohol-based compound is added in the range of 0.02 to 10 wt% Based compound in an amount which makes the total content of aromatic hydrocarbons in the gasoline composition in the range of 0.02 to 33 wt%
Wherein the ether-based compound is at least one selected from the group consisting of methyl tert -butyl ether, ethyl tert -butyl ether, tert -amyl methyl ether and dibutyl ether, and the alcohol-based compound is selected from the group consisting of methanol, ethanol, n- sec -butanol, and tert -butanol, and the aromatic hydrocarbon is at least one selected from the group consisting of benzene, toluene, ethylbenzene, xylene ethylbenzene and C10 aromatic hydrocarbons. Gt; delete The method of claim 7,
The sec - butyl acetate has a purity of 80 wt% or more. delete delete delete