Multifunctional diesel detergents and methods for their preparation

Abstract

The application relates to the technical field of diesel clean agents, and discloses a multifunctional diesel clean power agent and a preparation method thereof, which comprises the following components: 15-40% of polyisobutylene succinimide, 10-20% of modified clean compounds, 5-12% of tetrahydrofuran, 3-10% of alkyl rare earth, 2-6% of N,N-di-sec-butyl phenylenediamine, and the rest of organic solvents. The clean power agent is prepared by mixing the clean agent polyisobutylene succinimide, the modified clean compounds, the smoke remover tetrahydrofuran, the alkyl rare earth, the antioxidant N,N-di-sec-butyl phenylenediamine and the organic solvents. The application range is wide, the diesel engine nozzle deposits can be effectively removed, the fuel supply system and the combustion system can be kept clean and lubricated, the air flow is increased, the smoke degree is reduced, the oil consumption is lowered, the antioxidation and corrosion resistance are simultaneously achieved, and the fuel quality is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of diesel fuel cleaning agent technology, specifically to a multifunctional diesel fuel cleaning and power agent and its preparation method. Background Technology

[0002] Diesel fuel detergents are a type of fuel additive that inhibits nozzle deposit formation, removes existing deposits, improves fuel atomization efficiency, and maintains optimal engine performance, thus positively impacting emissions reduction and fuel consumption. Diesel fuel detergents are diverse in function and can currently be divided into two main categories: ash-containing detergents and ashless detergents. Ash-containing detergents lower diesel ignition temperature, increase combustion speed, and reduce exhaust emissions and harmful substance formation. Ashless detergents improve atomization, remove carbon deposits, reduce mechanical wear, and enhance diesel fuel quality. While both types of diesel fuel detergents have their advantages, some lack the functionality required to meet most market demands. Therefore, developing a product that combines the advantages of both types to meet market needs has significant economic and application value. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a multifunctional diesel cleaning and power agent and its preparation method, which reduces fuel consumption and exhaust emissions.

[0005] (II) Technical Solution

[0006] A multifunctional diesel fuel cleaner comprises the following components:

[0007] 15-40% polyisobutylene succinimide, 10-20% modified cleaning compound, 5-12% tetrahydrofuran, 3-10% alkyl rare earth, 2-6% N,N-di-sec-butylphenylenediamine, balance being organic solvent.

[0008] Preferably, the method for preparing the modified cleaning compound is as follows:

[0009] (1) Mix p-tert-butylphenol and toluene, stir evenly, add p-toluenesulfonic acid, start stirring and heating, raise the temperature to 50-65℃, add tetraethylenepentamine, pass nitrogen gas, add granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 10-30 h, wait for the reaction mixture to cool to 50-60℃, filter to remove insoluble matter, distill the filtrate under reduced pressure to remove unreacted small molecules and solvent, and obtain intermediate product 1;

[0010] (2) Mix intermediate product 1 and toluene, stir evenly, add p-toluenesulfonic acid, start stirring and heating, raise the temperature to 55-65℃, add p-hydroxybenzoic acid, raise the temperature to 70-85℃, react for 1-5 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 2.

[0011] (3) Mix intermediate product 2 and toluene, stir evenly, heat to 60-80℃, slowly add epichlorohydrin, keep warm for 1-5 h, lower the temperature to 20-40℃, add sodium hydroxide solution, react for 50-120 min, soak chitosan in 8-16% acetic acid solution, stir until dissolved, then add chitosan solution to the above reaction solution, react at 60-80℃ for 10-30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3;

[0012] (4) Mix intermediate product 3 and toluene, stir evenly, add hydrogen peroxide and copper oxide catalyst, react at 60-80℃ for 10-60 min, then add α-aminopyridine, heat to 80-140℃, react for 10-30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain modified and clean compound.

[0013] Preferably, in step (1), the mass ratio of p-tert-butylphenol, tetraethylenepentamine, and paraformaldehyde is 1:0.8-1.6:1.2-2.5.

[0014] Preferably, in step (2), the mass ratio of intermediate product 1 to p-hydroxybenzoic acid is 1:0.8-1.6.

[0015] Preferably, in step (3), the mass ratio of intermediate product 2, epichlorohydrin and chitosan is 1:1-1.6:1.2-2.5.

[0016] Preferably, in step (4), the mass ratio of intermediate product 3 to α-aminopyridine is 1:0.6-1.2.

[0017] Preferably, the alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0018] Preferably, the organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene.

[0019] Preferably, the preparation method of the cleaning and activating agent is as follows:

[0020] Polyisobutylene succinimide, modified cleaning compound, tetrahydrofuran, alkyl rare earth, and N,N-di-sec-butylphenylenediamine are added sequentially to an organic solvent and stirred until homogeneous to obtain a cleaning power agent.

[0021] (iii) Beneficial technical effects

[0022] A multifunctional diesel fuel cleaner comprises the following components:

[0023] 15-40% polyisobutylene succinimide, 10-20% modified cleaning compound, 5-12% tetrahydrofuran, 3-10% alkyl rare earth, 2-6% N,N-di-sec-butylphenylenediamine, balance being organic solvent.

[0024] This invention relates to a cleaning and power-enhancing agent prepared by mixing a detergent, polyisobutylene succinimide, a modified detergent compound, a smoke suppressant, tetrahydrofuran, alkyl rare earth elements, an antioxidant, N,N-di-sec-butylphenylenediamine, and an organic solvent. It has a wide range of applications, effectively removing deposits from diesel engine nozzles and maintaining the cleanliness and lubrication of the fuel supply and combustion systems. It also increases airflow, reduces smoke, and lowers fuel consumption, while providing antioxidant and anti-corrosion effects, effectively ensuring fuel quality. Detailed Implementation Example 1

[0025] (1) Mix 10 g of p-tert-butylphenol and 60 mL of toluene, stir well, add 0.2 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 50°C, add 8 g of tetraethylenepentamine, introduce nitrogen gas, add 12 g of granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 10 h, wait for the reaction mixture to cool to 50°C, filter to remove insoluble matter, and distill the filtrate under reduced pressure to remove unreacted small molecules and solvent to obtain intermediate product 1.

[0026] (2) Mix 10 g of intermediate product 1 with 60 mL of toluene, stir evenly, add 0.3 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 55℃, add 8 g of p-hydroxybenzoic acid, raise the temperature to 70℃, react for 1 h, remove unreacted small molecules and solvent by vacuum distillation, and obtain intermediate product 2.

[0027] (3) Mix 10 g of intermediate product 2 with 60 mL of toluene, stir evenly, heat to 60℃, slowly add 20 mL of epichlorohydrin, keep warm for 1 h, lower the temperature to 20℃, add 0.8 mL of sodium hydroxide solution, react for 50 min, add 12 g of chitosan to 30 mL of 8% acetic acid solution and stir until dissolved, then add the chitosan solution to the above reaction solution, react at 60℃ for 10 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3.

[0028] (4) Mix 10 g of intermediate product 3 and 60 mL of toluene, stir evenly, add 20 mL of hydrogen peroxide and 0.3 g of catalyst copper oxide, react at 60℃ for 10 min, then add 6 g of α-aminopyridine, heat to 80℃, react for 10 h, remove unreacted small molecules and solvent by vacuum distillation to obtain modified and clean compound.

[0029] (5) 15% polyisobutylene succinimide, 10% modified cleaning compound, 5% tetrahydrofuran, 3% alkyl rare earth and 2% N,N-disec-butylphenylenediamine are added to an organic solvent in sequence and stirred until uniform to obtain a cleaning power agent.

[0030] The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0031] The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene. Example 2

[0032] (1) Mix 50 g of p-tert-butylphenol and 100 mL of toluene, stir well, add 1 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 65°C, add 80 g of tetraethylenepentamine, purge with nitrogen, add 125 g of granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 30 h, wait for the reaction mixture to cool to 60°C, filter to remove insoluble matter, and distill the filtrate under reduced pressure to remove unreacted small molecules and solvent to obtain intermediate product 1.

[0033] (2) Mix 50 g of intermediate product 1 and 120 mL of toluene, stir evenly, add 0.8 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 65°C, add 80 g of p-hydroxybenzoic acid, raise the temperature to 85°C, react for 5 h, remove unreacted small molecules and solvent by vacuum distillation, and obtain intermediate product 2.

[0034] (3) Mix 50 g of intermediate product 2 with 120 mL of toluene, stir evenly, heat to 80℃, slowly add 80 mL of epichlorohydrin, keep warm for 5 h, lower the temperature to 40℃, add 5 mL of sodium hydroxide solution, react for 120 min, add 125 g of chitosan to 300 mL of 16% acetic acid solution and stir until dissolved, then add the chitosan solution to the above reaction solution, react at 80℃ for 30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3.

[0035] (4) Mix 50 g of intermediate product 3 and 120 mL of toluene, stir evenly, add 60 mL of hydrogen peroxide and 0.8 g of catalyst copper oxide, react at 80℃ for 60 min, then add 60 g of α-aminopyridine, heat to 140℃, react for 30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain the modified and clean compound.

[0036] (5) 40% polyisobutylene succinimide, 20% modified cleaning compound, 12% tetrahydrofuran, 10% alkyl rare earth and 6% N,N-disec-butylphenylenediamine are added to an organic solvent in sequence and stirred until uniform to obtain a cleaning power agent.

[0037] The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0038] The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene. Example 3

[0039] (1) Mix 20 g of p-tert-butylphenol and 70 mL of toluene, stir well, add 0.4 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 55°C, add 20 g of tetraethylenepentamine, purge with nitrogen, add 20 g of granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 15 h, wait for the reaction mixture to cool to 60°C, filter to remove insoluble matter, and distill the filtrate under reduced pressure to remove unreacted small molecules and solvent to obtain intermediate product 1.

[0040] (2) Mix 20 g of intermediate product 1 with 80 mL of toluene, stir evenly, add 0.5 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 60°C, add 30 g of p-hydroxybenzoic acid, raise the temperature to 75°C, react for 3 h, remove unreacted small molecules and solvent by vacuum distillation, and obtain intermediate product 2.

[0041] (3) Mix 20 g of intermediate product 2 with 80 mL of toluene, stir evenly, heat to 66℃, slowly add 40 mL of epichlorohydrin, keep warm for 3 h, lower the temperature to 30℃, add 2 mL of sodium hydroxide solution, react for 60 min, add 55 g of chitosan to 100 mL of 10% acetic acid solution and stir until dissolved, then add the chitosan solution to the above reaction solution, react at 70℃ for 20 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3.

[0042] (4) Mix 20 g of intermediate product 3 and 80 mL of toluene, stir evenly, add 30 mL of hydrogen peroxide and 0.4 g of catalyst copper oxide, react at 66℃ for 30 min, then add 30 g of α-aminopyridine, heat to 100℃, react for 20 h, remove unreacted small molecules and solvent by vacuum distillation to obtain modified and clean compound.

[0043] (5) 20% polyisobutylene succinimide, 15% modified cleaning compound, 8% tetrahydrofuran, 6% alkyl rare earth and 3% N,N-disec-butylphenylenediamine are added to an organic solvent in sequence and stirred until uniform to obtain a cleaning power agent.

[0044] The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0045] The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene. Example 4

[0046] (1) Mix 30 g of p-tert-butylphenol and 90 mL of toluene, stir well, add 0.6 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 60°C, add 50 g of tetraethylenepentamine, purge with nitrogen, add 85 g of granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 20 h, wait for the reaction mixture to cool to 50°C, filter to remove insoluble matter, and distill the filtrate under reduced pressure to remove unreacted small molecules and solvent to obtain intermediate product 1.

[0047] (2) Mix 30 g of intermediate product 1 with 100 mL of toluene, stir evenly, add 0.6 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 62°C, add 60 g of p-hydroxybenzoic acid, raise the temperature to 80°C, react for 4 h, remove unreacted small molecules and solvent by vacuum distillation, and obtain intermediate product 2.

[0048] (3) Mix 30 g of intermediate product 2 with 110 mL of toluene, stir evenly, heat to 72°C, slowly add 60 mL of epichlorohydrin, keep warm for 3 h, lower the temperature to 36°C, add 3 mL of sodium hydroxide solution, react for 100 min, add 80 g of chitosan to 200 mL of 15% acetic acid solution and stir until dissolved, then add the chitosan solution to the above reaction solution, react at 66°C for 25 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3.

[0049] (4) Mix 30 g of intermediate product 3 and 100 mL of toluene, stir evenly, add 50 mL of hydrogen peroxide and 0.6 g of catalyst copper oxide, react at 70℃ for 50 min, then add 50 g of α-aminopyridine, heat to 120℃, react for 25 h, remove unreacted small molecules and solvent by vacuum distillation to obtain the modified and clean compound.

[0050] (5) 30% polyisobutylene succinimide, 18% modified cleaning compound, 10% tetrahydrofuran, 6% alkyl rare earth and 4% N,N-disec-butylphenylenediamine are added to an organic solvent in sequence and stirred until uniform to obtain a cleaning power agent.

[0051] The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0052] The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene. Example 5

[0053] (1) Mix 40 g of p-tert-butylphenol and 80 mL of toluene, stir well, add 0.8 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 60°C, add 60 g of tetraethylenepentamine, purge with nitrogen, add 100 g of granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 22 h, wait for the reaction mixture to cool to 58°C, filter to remove insoluble matter, and distill the filtrate under reduced pressure to remove unreacted small molecules and solvent to obtain intermediate product 1.

[0054] (2) Mix 40 g of intermediate product 1 with 100 mL of toluene, stir evenly, add 0.7 g of p-toluenesulfonic acid, start stirring and heating, raise the temperature to 60°C, add 70 g of p-hydroxybenzoic acid, raise the temperature to 80°C, react for 4 h, remove unreacted small molecules and solvent by vacuum distillation, and obtain intermediate product 2.

[0055] (3) Mix 40 g of intermediate product 2 with 110 mL of toluene, stir evenly, heat to 70°C, slowly add 60 mL of epichlorohydrin, keep warm for 4 h, lower the temperature to 36°C, add 4 mL of sodium hydroxide solution, react for 100 min, add 100 g of chitosan to 220 mL of 12% acetic acid solution and stir until dissolved, then add the chitosan solution to the above reaction solution, react at 70°C for 20 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3.

[0056] (4) Mix 40 g of intermediate product 3 and 110 mL of toluene, stir evenly, add 50 mL of hydrogen peroxide and 0.5 g of catalyst copper oxide, react at 75℃ for 55 min, then add 40 g of α-aminopyridine, heat to 120℃, react for 20 h, remove unreacted small molecules and solvent by vacuum distillation to obtain the modified and clean compound.

[0057] (5) 32% polyisobutylene succinimide, 16% modified cleaning compound, 9% tetrahydrofuran, 8% alkyl rare earth and 5% N,N-disec-butylphenylenediamine were added to an organic solvent in sequence and stirred until uniform to obtain a cleaning power agent.

[0058] The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

[0059] The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene.

[0060] Comparative Example 1: No cleaning and power-up agent added.

[0061] Test Example: The cleaning and power additive prepared in Examples 1-5 was added to commercially available No. 0 diesel fuel. Five diesel vehicles were then tested over a three-week period. One unadulterated diesel vehicle was also tested. Smoke opacity was measured before and after the test according to GB / T3846, nozzle airflow was measured according to ISO4010, and fuel consumption was observed. The results are shown in Table 1.

[0062] Table 1 Test Results

[0063]

[0064] As shown in Table 1, Examples 1-5 significantly improved smoke opacity, airflow, and fuel consumption compared to Comparative Example 1, effectively increasing airflow and reducing smoke opacity and fuel consumption.

[0065] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional diesel cleaning and power agent, characterized in that: The cleaning and energizing agent comprises the following components: 15-40% polyisobutylene succinimide, 10-20% modified cleaning compound, 5-12% tetrahydrofuran, 3-10% alkyl rare earth, 2-6% N,N-di-sec-butylphenylenediamine, balance is organic solvent. The preparation method of the modified cleaning compound: (1) Mix p-tert-butylphenol and toluene, stir evenly, add p-toluenesulfonic acid, start stirring and heating, raise the temperature to 50-65℃, add tetraethylenepentamine, pass nitrogen gas, add granular paraformaldehyde in batches, raise the temperature to reflux temperature, maintain this temperature for 10-30 h, wait for the reaction mixture to cool to 50-60℃, filter to remove insoluble matter, distill the filtrate under reduced pressure to remove unreacted small molecules and solvent, and obtain intermediate product 1; (2) Mix intermediate product 1 and toluene, stir evenly, add p-toluenesulfonic acid, start stirring and heating, raise the temperature to 55-65℃, add p-hydroxybenzoic acid, raise the temperature to 70-85℃, react for 1-5 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 2. (3) Mix intermediate product 2 and toluene, stir evenly, heat to 60-80℃, slowly add epichlorohydrin, keep warm for 1-5h, lower the temperature to 20-40℃, add sodium hydroxide solution, react for 50-120 min, soak chitosan in 8-16% acetic acid solution, stir until dissolved, then add chitosan solution to the above reaction solution, react at 60-80℃ for 10-30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain intermediate product 3; (4) Mix intermediate product 3 and toluene, stir evenly, add hydrogen peroxide and copper oxide catalyst, react at 60-80℃ for 10-60 min, then add α-aminopyridine, heat to 80-140℃, react for 10-30 h, remove unreacted small molecules and solvent by vacuum distillation to obtain modified and clean compound. In step (1), the mass ratio of p-tert-butylphenol, tetraethylenepentamine, and paraformaldehyde is 1:0.8-1.6:1.2-2.

5.

2. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: In step (2), the mass ratio of intermediate product 1 to p-hydroxybenzoic acid is 1:0.8-1.

6.

3. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: In step (3), the mass ratio of intermediate product 2, epichlorohydrin, and chitosan is 1:1-1.6:1.2-2.

5.

4. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: In step (4), the mass ratio of intermediate product 3 to α-aminopyridine is 1:0.6-1.

2.

5. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: The alkyl rare earth is cerium isooctanoate, lanthanum isooctanoate, or a mixed rare earth salt of lanthanum and cerium isooctanoate.

6. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: The organic solvent is toluene, xylene, heavy aromatics, diesel oil, or kerosene.

7. The multifunctional diesel cleaning and power agent according to claim 1, characterized in that: The preparation method of the cleaning and energizing agent is as follows: Polyisobutylene succinimide, modified cleaning compound, tetrahydrofuran, alkyl rare earth, and N,N-di-sec-butylphenylenediamine are added sequentially to an organic solvent and stirred until homogeneous to obtain a cleaning power agent.

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