Diesel engine oil additive with cleaning and dispersing effects and its preparation method

Abstract

The application relates to the technical field of lubricating oil additives, and discloses a diesel engine oil additive with cleaning and dispersing effects and a preparation method thereof.The diesel engine oil additive comprises the following components in parts by weight: polyisobutylene succinic anhydride-based ashless dispersant 40-60, alkyl calcium salicylate detergent 20-30, organic molybdenum anti-wear agent 5-10, antioxidant 2-5, metal deactivator 1-3, and the like.The diesel engine oil additive is prepared by compounding the polyisobutylene succinic anhydride-based ashless dispersant and the alkyl calcium salicylate detergent, and combining the organic molybdenum anti-wear agent, the antioxidant and other additives, so that the soot, the carbon deposit and the oil sludge in the diesel engine can be efficiently cleaned and dispersed, the diesel engine oil has excellent antioxidant and anti-wear properties, the service performance of the diesel engine oil can be remarkably improved, and the service life of the engine is prolonged.The preparation method is simple in process, mild in reaction condition, does not need complicated equipment and harsh reaction condition, the production cost is controllable, and the method is suitable for industrial large-scale production.

Description

Technical Field

[0001] This application relates to the technical field of lubricating oil additives, and in particular to a diesel engine oil additive with cleaning and dispersing effects and its preparation method. Background Technology

[0002] During operation, incomplete combustion of fuel in diesel engines produces soot and carbon deposits. At the same time, lubricating oil is prone to forming sludge under high temperature and oxidizing conditions. If these impurities are not cleaned and dispersed in time, they will adhere to the surface of engine components such as pistons, cylinders, and oil passages, leading to increased engine wear, increased fuel consumption, reduced power, and even engine failure.

[0003] However, in practical applications, most existing additives suffer from limited cleaning and dispersing properties. For example, some dispersants are only effective at dispersing soot, with weak cleaning ability for carbon deposits and sludge; while some detergents can remove high-temperature carbon deposits, they cannot effectively disperse low-temperature sludge. In addition, some additives, while possessing cleaning and dispersing properties, sacrifice other properties of lubricating oil, such as anti-oxidation and anti-wear properties, making it difficult to meet the complex operating requirements of diesel engines.

[0004] Therefore, those skilled in the art provide a diesel engine oil additive with cleaning and dispersing effects and a method for preparing the same, in order to solve the problems mentioned in the background art. Summary of the Invention

[0005] To address the issues raised in the background section regarding the limited cleaning and dispersing properties of most additives—such as some dispersants only effectively dispersing soot and having weak cleaning capabilities for carbon deposits and sludge; and some detergents that can remove high-temperature carbon deposits but cannot effectively disperse low-temperature sludge—and to prevent some additives from sacrificing other lubricating properties such as antioxidant and anti-wear properties while possessing cleaning and dispersing properties, making it difficult to meet the complex operating requirements of diesel engines, this application provides a diesel engine oil additive with cleaning and dispersing effects and its preparation method.

[0006] The diesel engine oil additive with cleaning and dispersing effects provided in this application and its preparation method adopt the following technical solution: by weight, it includes the following components: 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant, 20-30 parts of alkyl salicylate calcium detergent, 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, 1-3 parts of metal deactivator, and 5-15 parts of diluent oil.

[0007] Preferably, the number average molecular weight of the polyisobutylene succinic anhydride-based ashless dispersant is 1000-2000, wherein the number average molecular weight of the polyisobutylene segments is 800-1800.

[0008] Preferably, the alkalinity of the alkyl salicylate calcium detergent is 250-350 mg KOH / g, and the number of carbon atoms in the alkyl chain is 12-18.

[0009] Preferably, the organic molybdenum anti-wear agent is one or both of molybdenum dialkyl dithiophosphate or molybdenum dialkyl dithiocarbamate; the antioxidant is one or both of 2,6-di-tert-butyl-p-cresol or p-aminodiphenylamine; the metal deactivator is one or both of benzotriazole or methylbenzotriazole; and the diluent is a hydrotreated base oil with a viscosity grade of VI 100-150.

[0010] Preferably, it includes the following steps:

[0011] (1) By weight, add 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant and 20-30 parts of alkyl salicylate calcium detergent to the reactor, heat to 60-80℃ under nitrogen protection, and stir at 300-500r / min for 30-60min.

[0012] (2) Add 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, and 1-3 parts of metal deactivator to the reactor, and continue stirring at 60-80℃ for 60-90 min;

[0013] (3) Cool down to 40-50℃, add 5-15 parts of diluent oil, stir for 20-30 minutes, filter and discharge to obtain diesel engine oil additive.

[0014] Preferably, in step (1), the nitrogen gas is introduced at a rate of 0.5-1 L / min, and the pressure inside the reactor is maintained at 0.1-0.2 MPa.

[0015] Preferably, in step (3), a 200-300 mesh filter screen is used for filtration, and the filtration pressure is 0.3-0.5 MPa.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] 1. The diesel engine oil additive of the present invention is formulated with polyisobutylene succinic anhydride-based ashless dispersant and alkyl salicylate calcium detergent, combined with organic molybdenum anti-wear agent, antioxidant and other additives, to achieve efficient cleaning and dispersion of soot, carbon deposits and sludge in diesel engines. At the same time, it has excellent antioxidant and anti-wear properties, which can significantly improve the performance of diesel engine oil and extend the service life of the engine.

[0018] 2. The preparation method of the present invention is simple, the reaction conditions are mild, no complex equipment or harsh reaction conditions are required, the production cost is controllable, and it is suitable for large-scale industrial production.

[0019] 3. The synergistic effect among the components is significant. The steric hindrance effect of the polyisobutylene succinic anhydride-based ashless dispersant works in conjunction with the acid-base neutralization and film-forming effect of the alkyl salicylate calcium detergent. The organic molybdenum anti-wear agent, antioxidant and other additives further enhance the comprehensive performance of the additive, effectively solving the problem of the single cleaning and dispersing performance and poor comprehensive performance of existing additives. Detailed Implementation

[0020] This application discloses a diesel engine oil additive with cleaning and dispersing effects and its preparation method. By weight, it includes the following components: 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant, 20-30 parts of alkyl salicylate calcium detergent, 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, 1-3 parts of metal deactivator, and 5-15 parts of diluent oil.

[0021] In this application, the number average molecular weight of the polyisobutylene succinic anhydride-based ashless dispersant is 1000-2000, wherein the number average molecular weight of the polyisobutylene segments is 800-1800.

[0022] In this application, the alkyl salicylate calcium detergent has an alkalinity of 250-350 mg KOH / g and the alkyl chain has 12-18 carbon atoms.

[0023] In this application, the organic molybdenum anti-wear agent is one or both of molybdenum dialkyl dithiophosphate or molybdenum dialkyl dithiocarbamate; the antioxidant is one or both of 2,6-di-tert-butyl-p-cresol or p-aminodiphenylamine; the metal deactivator is one or both of benzotriazole or methylbenzotriazole; and the diluent is a hydrogenated base oil with a viscosity grade of VI 100-150.

[0024] This application includes the following steps:

[0025] (1) By weight, add 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant and 20-30 parts of alkyl salicylate calcium detergent to the reactor, heat to 60-80℃ under nitrogen protection, and stir at 300-500r / min for 30-60min.

[0026] (2) Add 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, and 1-3 parts of metal deactivator to the reactor, and continue stirring at 60-80℃ for 60-90 min;

[0027] (3) Cool down to 40-50℃, add 5-15 parts of diluent oil, stir for 20-30 minutes, filter and discharge to obtain diesel engine oil additive.

[0028] In this application, the nitrogen gas introduction rate in step (1) is 0.5-1 L / min, and the pressure inside the reactor is maintained at 0.1-0.2 MPa.

[0029] In this application, the filtration in step (3) uses a 200-300 mesh filter screen and the filtration pressure is 0.3-0.5MPa.

[0030] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description in the specification. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0032] Secondly: In the embodiments disclosed in this invention, only the structures involved in the embodiments disclosed in this invention are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

Claims

1. A diesel engine oil additive with cleaning and dispersing effects and its preparation method, characterized in that, By weight, it includes the following components: 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant, 20-30 parts of alkyl salicylate calcium detergent, 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, 1-3 parts of metal deactivator, and 5-15 parts of diluent oil.

2. The additive according to claim 1, characterized in that, The polyisobutylene succinic anhydride-based ashless dispersant has a number average molecular weight of 1000-2000, wherein the number average molecular weight of the polyisobutylene segments is 800-1800.

3. The additive according to claim 1, characterized in that, The alkyl salicylate calcium detergent has an alkalinity of 250-350 mg KOH / g and the alkyl chain has 12-18 carbon atoms.

4. The additive according to claim 1, characterized in that, The organic molybdenum anti-wear agent is one or both of dialkyl dithiophosphate molybdenum or dialkyl dithiocarbamate molybdenum; the antioxidant is one or both of 2,6-di-tert-butyl-p-cresol or p-aminodiphenylamine; the metal deactivator is one or both of benzotriazole or methylbenzotriazole; and the diluent oil is a hydrotreated base oil with a viscosity grade of VI 100-150.

5. A method for preparing a diesel engine oil additive with cleaning and dispersing effects as described in any one of claims 1-4, characterized in that, Includes the following steps: (1) By weight, add 40-60 parts of polyisobutylene succinic anhydride-based ashless dispersant and 20-30 parts of alkyl salicylate calcium detergent to the reactor, heat to 60-80℃ under nitrogen protection, and stir at 300-500r / min for 30-60min. (2) Add 5-10 parts of organic molybdenum anti-wear agent, 2-5 parts of antioxidant, and 1-3 parts of metal deactivator to the reactor, and continue stirring at 60-80℃ for 60-90 min; (3) Cool down to 40-50℃, add 5-15 parts of diluent oil, stir for 20-30 minutes, filter and discharge to obtain the diesel engine oil additive.

6. The preparation method according to claim 5, characterized in that, In step (1), the nitrogen gas is introduced at a rate of 0.5-1 L / min, and the pressure inside the reactor is maintained at 0.1-0.2 MPa.

7. The preparation method according to claim 5, characterized in that, In step (3), a 200-300 mesh filter screen is used for filtration, and the filtration pressure is 0.3-0.5 MPa.