Fifth-generation gasoline detergent as well as preparation method and application thereof

Abstract

The invention discloses a fifth-generation gasoline detergent and a preparation method and application thereof.The detergent is prepared from, by mass, 5.1%-16% of azole polynitrogen compounds with the carbon atom number being 6-12 and the nitrogen atom number being 3-6, 40.1%-48% of Mannich base detergent dispersants with the number containing C8-14, 5.1%-12% of organic acid R6-12 hydrazine catalytic auxiliaries, 1.4%-3% of antioxidants and 30%-49.5% of C8-12 straight-chain alkane. The preparation method comprises the following steps: mixing the components according to the proportion, and filtering through a 1-1.5 mu m filter screen. The additive amount of the cleaning agent is 200-220 mL / m < 3 >, sufficient combustion of gasoline can be promoted, the emission amounts of CO, HC and NOx in tail gas are reduced by 30%, 33% and 19% respectively, the fuel saving rate reaches 10.24-14.01%, the power of an engine can be improved, and an automobile is assisted to meet the strict emission standard.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gasoline additives, and particularly relates to a fifth-generation gasoline detergent, a preparation method and application thereof. BACKGROUND

[0002] Urban motor vehicle emissions are the main cause of air pollution, resulting in a decrease in the number of good air pollution index days and an increase in the fineness and proportion of inhalable pollutant particles (PM≤2.5).

[0003] Gasoline is mainly composed of catalytic cracking gasoline fractions, and the content of olefins, especially diolefins, is relatively high, while the content of alkanes is relatively low, which makes it more prone to generate deposits. Cars using such gasoline are prone to problems such as idle shaking, increased noise, increased fuel consumption, deteriorated emissions, and difficult starting, and the root cause is excessive engine deposits.

[0004] The fifth-generation gasoline detergent has the effects of inhibiting and removing engine deposits, enhancing power and saving fuel, can improve the cold start performance, and to a certain extent, reduce pollutant emissions. Adding a small amount of detergent to automobile fuel is an effective way to reduce the impact of deposits, reduce automobile emissions, enhance power, and save fuel.

[0005] In the past ten years, the mainstream fourth-generation gasoline detergent on the market mainly uses di-nitrogen compounds (molecular formula: number of nitrogen atoms ≤2), polyisobutylene amine, and polyether amine as dispersants to control carbon deposition, ensure that engine efficiency does not decrease rapidly due to carbon deposition, and prevent incomplete combustion caused by carbon deposition, which leads to off-gas non-compliance. However, the fourth-generation detergent only delays carbon deposition and has limited effect on engine power enhancement and off-gas decomposition.

[0006] With the rapid development of the automobile industry, modern engine technology is becoming increasingly complex, especially the widespread use of high-performance engines such as direct injection engines and turbocharged engines, which puts higher demands on gasoline quality. Traditional gasoline detergents have been unable to meet the needs of preventing carbon deposition and deposit formation in key parts such as engine injectors and intake valves. At the same time, increasingly stringent environmental regulations worldwide require further reduction of pollutant content in automobile exhaust emissions, prompting continuous upgrading of gasoline detergent technology. The first four generations of gasoline detergents have certain limitations in terms of cleaning effect, fuel economy improvement, and comprehensive performance in reducing emissions. Therefore, it is urgent to develop the fifth-generation gasoline detergent. To effectively improve the efficiency of motor vehicle engines based on the rated power of the engine by adding the fifth-generation gasoline detergent, while promoting the decomposition of harmful substances in exhaust gas and reducing the emission of harmful substances from motor vehicles, the development of a new type of fuel detergent that meets environmental and fuel-saving requirements to achieve more energy saving and exhaust gas purification has become a problem that needs to be solved by those skilled in the art. SUMMARY

[0007] The present application aims to provide a fifth-generation gasoline detergent and its preparation method and application to solve the problems in the background art.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A fifth-generation gasoline detergent and its preparation method and application, comprising, in mass percentage: 5.1-16% of a poly-nitrogen compound, which is an azole organic compound with a carbon atom number of 6-12 and a nitrogen atom number of 3-6 in the molecular formula; 40.1-48% of a Mannich base cleaning dispersant, which is an organic nitrogen compound containing C8-14 in the number average; 5.1-12% of a catalytic aid, which is an organic acid R 6--12 hydrazine; 1.4-3% of an antioxidant; 30-49.5% of a straight-chain alkane, which is a C8-12 straight-chain alkane.

[0009] Preferably, the antioxidant is selected from phenolic antioxidants or amine antioxidants for gasoline.

[0010] Preferably, the azole organic compound is a triazole, tetrazole or pentazole derivative containing 3-6 nitrogen atoms.

[0011] Preferably, the organic acid R6-12 hydrazine is a fatty acid hydrazine or an aromatic acid hydrazine with a carbon atom number of 6-12.

[0012] Preferably, the preparation method of the fifth-generation gasoline detergent comprises the following steps: The poly-nitrogen compound, the Mannich base cleaning dispersant, the catalytic aid, the antioxidant and the straight-chain alkane are added to a reaction kettle in proportion, stirred and mixed at 20-40°C for 30-60 minutes until uniform, then filtered with a 1-1.5 μm filter screen to obtain a clear and transparent fifth-generation gasoline detergent product.

[0013] Preferably, the application of the fifth-generation gasoline detergent in gasoline has an addition amount of 200-220 mL / m 3 .

[0014] Preferably, the gasoline is 92#, 95# or higher grade gasoline.

[0015] Compared with the prior art, the present application provides a fifth-generation gasoline detergent and its preparation method and application, which has the following beneficial effects: The present application creatively introduces specific polynitrogen compounds and organic acid hydrazine, in the engine combustion process, polynitrogen compounds are decomposed instantaneously to produce a large number of free radicals under the catalytic cooperation of organic acid hydrazine, which can effectively promote the full combustion of gasoline, and the N2 gas produced by decomposition can also improve the power of the engine, thus essentially improving the power output of the engine, thereby reducing fuel consumption, and also reducing the generation of carbon deposition and reducing the content of harmful substances in the exhaust gas.

[0016] In addition, the present application introduces a catalytic aid, which also enters the three-way catalyst with the exhaust gas, and cooperates with the catalytic conversion in the three-way catalyst to achieve better exhaust gas purification and decomposition effect, thereby further reducing the content of exhaust gas emission pollutants. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] The present application provides a fifth-generation gasoline detergent and its preparation method and application, which comprises, by mass percentage: Polynitrogen compounds 5.1-16%, the polynitrogen compounds are azole organic compounds with 6-12 carbon atoms and 3-6 nitrogen atoms in the molecular formula; Mannich base cleaning dispersant 40.1-48%, the Mannich base cleaning dispersant is an organic nitrogen compound containing C8-14 in number average; Catalytic aid 5.1-12%, the catalytic aid is organic acid R 6--12 Hydrazine; Antioxidant 1.4-3%; Straight-chain alkane 30-49.5%, the straight-chain alkane is C8-12 straight-chain alkane.

[0019] The antioxidant is selected from phenolic antioxidants or amine antioxidants for gasoline.

[0020] The azole organic compound is a triazole, tetrazole or pentazole derivative containing 3-6 nitrogen atoms.

[0021] The organic acid R6-12 hydrazine is a fatty acid hydrazine or an aromatic acid hydrazine with 6-12 carbon atoms.

[0022] The preparation method of the fifth-generation gasoline detergent comprises the following steps: The polyazocompound, Mannich base detergent dispersant, catalytic aid, antioxidant and straight-chain alkane are added into the reaction kettle in proportion, stirred and mixed at 20-40℃ for 30-60 minutes until uniform, and then filtered with a 1-1.5 μm filter screen to obtain the clear and transparent fifth-generation gasoline detergent product.

[0023] The fifth-generation gasoline detergent is applied in gasoline, and the addition amount of the fifth-generation gasoline detergent in gasoline is 200-220 mL / m 3 .

[0024] The gasoline is 92#, 95# or higher grade gasoline. Specific embodiment Example 1 A fifth-generation gasoline detergent comprises the following components: polyazocompound (R6-N3) 5.2%; Mannich base detergent dispersant 41.5%; catalytic aid (hydrazine) 5.5%; antioxidant 1.5%; straight-chain alkane (C8) 46.3%.

[0026] The preparation process is as follows: the straight-chain alkane (C8), Mannich base detergent dispersant, polyazocompound, catalytic aid and antioxidant are sequentially added into an oil blending tank in a mass ratio, and then filtered with a 1-1.5 μm filter screen to obtain the clear and transparent fifth-generation gasoline detergent.

[0027] Example 2 A fifth-generation gasoline detergent comprises the following components: polyazocompound (R6-N3) 5.5%; Mannich base detergent dispersant 43.0%; catalytic aid 7.1%; antioxidant 1.5%; straight-chain alkane (C8-C12) 42.9%.

[0028] The preparation process is as follows: the straight-chain alkane (C8-C12), Mannich base detergent dispersant, polyazocompound, catalytic aid and antioxidant are sequentially added into an oil blending tank in a mass ratio, and then filtered with a 1-1.5 μm filter screen to obtain the clear and transparent fifth-generation gasoline detergent.

[0029] Example 3 A fifth-generation gasoline detergent comprises the following components: polyazocompound (R6-N3) 14.5%; Mannich base detergent dispersant 41.0%; catalytic aid (hydrazine) 7.5%; antioxidant 2.5%; straight-chain alkane (C8-C12) 34.5%.

[0030] The preparation process is as follows: the straight-chain alkane (C8-C12), Mannich base detergent dispersant, polyazocompound, catalytic aid and antioxidant are sequentially added into an oil blending tank in a mass ratio, and then filtered with a 1-1.5 μm filter screen to obtain the clear and transparent fifth-generation gasoline detergent.

[0031] Example 4: A fifth generation gasoline detergent, comprising the following components: polyazide compound (R6-N3) 15.8%; Mannich base detergent 47.0%; catalytic aid (hydrazine) 10.5%; antioxidant 2.5%; straight-chain alkane (C8-C12) 24.2%.

[0032] The preparation process is as follows: straight-chain alkane (C8-C12), Mannich base detergent, polyazide compound, catalytic aid, antioxidant are sequentially added to the oil mixing tank according to the mass ratio, and then filtered with a 1-1.5um filter screen to obtain a clear and transparent fifth generation gasoline detergent.

[0033] Example 5: A fifth generation gasoline detergent, comprising the following components: polyazide compound (R6-N3) 15.0%; Mannich base detergent 37.0%; catalytic aid (hydrazine) 10.5%; antioxidant 1.5%; straight-chain alkane (C8-C12) 45.0%.

[0034] The preparation process is as follows: straight-chain alkane (C8-C12), Mannich base detergent, polyazide compound, catalytic aid, antioxidant are sequentially added to the oil mixing tank according to the mass ratio, and then filtered with a 1-1.5um filter screen to obtain a clear and transparent fifth generation gasoline detergent.

[0035] The fifth generation gasoline detergent prepared in Examples 1-5 is detected for quality indicators, and the detection results are shown in Table 1 below: Application example: evaluate and compare by constant speed 95-110km / h fuel consumption and idling exhaust detection.

[0036] Test vehicle types include: Volkswagen Tuguan 2017 380TSI (95#, comprehensive fuel consumption 8.8-11.5L / 100Km, fuel tank capacity 66L, total displacement 2.0L); Audi A6-2015 45TFSI (95#, comprehensive fuel consumption 9.3-10.5L / 100Km, fuel tank capacity 75L, total displacement 2.0L); Audi A4-2012 TFSI (95#, comprehensive fuel consumption 8.06-10.45L / 100Km, fuel tank capacity 65L, total displacement 2.0L); Honda Accord 2012 R20A3 (92#, comprehensive fuel consumption 9.5-10.2L / 100Km, fuel tank capacity 70L, total displacement 2.0L).

[0037] The fifth generation gasoline detergent prepared in Examples 1-5 is added to the test vehicles according to 210mL / m 3First add the oil tank, then add 95#, 92# gasoline respectively. Drive at a constant speed of 95-110km / h, compare the fuel consumption per 100km. According to GB18285-2018 "Gasoline Vehicle Emission Limit and Measurement Method (Double Idle Speed Method and Simple Working Condition Method)", the tail gas pollutants are detected by double idle speed method.

[0038] The detection results are shown in Table 2 (tail gas detection results) and Table 3 (fuel consumption detection results): Table 2 Tail gas detection results The test results show that after adding the fifth generation gasoline detergent of the application, the HC, CO and NOx emissions in idle speed state are reduced by about 29%, 27% and 17% compared with the blank, and the HC, CO and NOx emissions in high idle speed state are reduced by about 33%, 30% and 19% respectively compared with the blank.

[0039] Before refueling, add examples 1-5, compare the fuel consumption per 100km.

[0040] The test results are shown in Table 3 Table 3 The test results show that after adding the fifth generation gasoline detergent examples 1-5 of the application, the driving test verifies that the oil saving rate is reduced by 10.24-14.01%.

[0041] The introduction of polyazocompounds can effectively reduce fuel consumption and reduce the emissions of tail gas HC, CO and NOx; the introduction of catalytic additives further reduces the emissions of tail gas HC, CO and NOx. After adding the fifth generation gasoline detergent of the application, the fuel consumption and the emissions of tail gas HC, CO and NOx can be effectively reduced. When the car uses gasoline added with such organic polyazocompounds, the free radicals generated by the decomposition of organic polyazocompounds in the engine combustion chamber can promote the complete combustion of gasoline. On the one hand, the generation of HC and CO is reduced, so that the emissions of these two pollutants in the tail gas can be reduced by 33% and 30%; on the other hand, the nitrogen element in the organic polyazocompounds can react with the NOx generated in the combustion process to reduce it to nitrogen, thereby reducing the emission of NOx, and the emission reduction effect can reach 19%. This emission reduction measure helps the car to meet more stringent tail gas emission standards and improve urban air quality.

[0042] In summary, the fifth generation gasoline detergent of the application has obvious environmental protection and oil saving effect, and can be applied to 92#, 95# gasoline or higher standard gasoline.

[0043] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fifth-generation gasoline detergent, its preparation method and application, characterized in that, By weight percentage, including: 5.1-16% of polynitrogen compounds, wherein the polynitrogen compounds are azole organic compounds with 6-12 carbon atoms and 3-6 nitrogen atoms in their molecular formula; Mannich base cleaning and dispersing agent 40.1-48%, wherein the Mannich base cleaning and dispersing agent is an organic nitrogen compound containing C8-14 in all numbers; Catalytic promoter 5.1-12%, wherein the catalytic promoter is organic acid R 6--12 hydrazine; Antioxidant 1.4-3%; The content of straight-chain alkanes is 30-49.5%, and the straight-chain alkanes are C8-12 straight-chain alkanes.

2. The fifth-generation gasoline detergent according to claim 1, characterized in that, The antioxidant is selected from phenolic antioxidants or amine antioxidants used in gasoline.

3. The fifth-generation gasoline detergent according to claim 1, characterized in that, The azole organic compounds are triazole, tetraazole, or pentaazole derivatives containing 3-6 nitrogen atoms.

4. The fifth-generation gasoline detergent according to claim 1, characterized in that, The organic acid R6-12 hydrazine is a fatty acid hydrazine or an aromatic acid hydrazine with 6-12 carbon atoms.

5. A method for preparing the fifth-generation gasoline detergent according to any one of claims 1-4, characterized in that, Includes the following steps: Add polynitrogen compounds, Mannich base detergent dispersant, catalyst aid, antioxidant and straight-chain alkanes to a reaction vessel in proportion, stir and mix at 20-40℃ for 30-60 minutes until homogeneous, and then filter with a 1-1.5μm filter to obtain a clear and transparent fifth-generation gasoline detergent product.

6. The application of the fifth-generation gasoline detergent according to any one of claims 1-4 in gasoline, characterized in that, The fifth-generation gasoline detergent is added to gasoline at a rate of 200-220 mL / m³. 3 .

7. The application according to claim 6, characterized in that, The gasoline is 92#, 95# or higher octane gasoline.

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