Composite heavy fuel oil additive, heavy fuel oil and application of heavy fuel oil to ship device

Abstract

The invention relates to a composite fuel oil additive, fuel oil and application. The composite fuel oil additive comprises the following components in parts by mass: 1-8 parts of an isocaprylic acid metal substance, 1-5 parts of a transition metal ionic compound and 15-20 parts of a surfactant, the surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonyl naphthalene sulfonic acid and dodecylbenzene sulfonic acid. The composite fuel oil additive can obviously improve the combustion efficiency and the utilization rate of fuel oil / fuel oil and improve the stability of fuel oil components, so that the fuel oil / fuel oil can be fully combusted, generation of carbon emission particles is reduced, meanwhile, residual carbon deposits in a fuel oil / fuel oil engine can be cleared and decomposed, abrasive particle abrasion of the engine is reduced, and the service life of the engine is prolonged. The engine working efficiency is improved; meanwhile, the composite fuel oil additive disclosed by the invention is green and economic, is suitable for industrial production, and can be applied to the fields of ships and the like.

Description

Technical Field

[0001] The invention relates to the technical field of fuel oil additives, and in particular to a composite heavy fuel oil additive, heavy fuel oil and applications in ship equipment. Background Art

[0002] Heavy marine fuel oil (HMBF) is a heavy fuel used in engines of large ocean-going ships, with characteristics such as high viscosity and high calorific value. Heavy marine fuel oil is mainly blended with heavy oil and light oil. However, affected by many factors, the sources of blending raw materials for heavy marine fuel oil have become more extensive, ranging from petroleum refining products to deep-processing raw materials and even including coal tar, tire oil, etc. There are obvious differences in the composition of blending raw materials from different sources, which often affect the compatibility between raw materials and the dispersion of each component, thereby aggravating the aggregation and deposition of asphaltene in heavy marine fuel oil, resulting in poor combustion performance and stability of the blended heavy marine fuel oil, causing a large amount of carbon deposits to remain in the fuel oil engine, affecting the working efficiency of the engine, and also hindering the full combustion of fuel oil, fuel utilization, and causing a certain burden on the environmental impact. Summary of the invention

[0003] Based on this, it is necessary to provide a green and environmentally friendly composite heavy fuel oil additive, heavy fuel oil and its application in ship equipment that can improve the combustion performance and stability of fuel oil.

[0004] In a first aspect, the present invention provides a composite fuel oil additive, wherein the composite fuel oil additive comprises 1-8 parts by mass of a metal isooctanoate, 1-5 parts by mass of a transition metal ion compound, and 15-20 parts by mass of a surfactant;

[0005] The surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonylnaphthalene sulfonic acid and dodecylbenzene sulfonic acid.

[0006] In some embodiments, the isooctanoic acid metal in the composite fuel oil additive is selected from one or more of lanthanum isooctanoate, cerium isooctanoate, calcium isooctanoate, manganese isooctanoate, zinc isooctanoate, cobalt isooctanoate, iron isooctanoate, barium isooctanoate, copper isooctanoate and magnesium isooctanoate;

[0007] In some embodiments, the transition metal ion compound in the composite fuel oil additive is selected from one or more of ferrocene, carbonyl iron, carbonyl cobalt, ferrocyanide compounds, cobalt cyanide compounds, iron nitrogen compounds and chromium nitrogen compounds;

[0008] In some embodiments, the surfactant is selected from nonylphenol ethoxylate NP-10 and / or nonylphenol ethoxylate NP-40.

[0009] In some embodiments, the composite fuel oil additive comprises 1-8 parts by mass of lanthanum isooctanoate, 1-5 parts by mass of ferrocene, and 15-20 parts by mass of nonylphenol polyoxyethylene ether.

[0010] In some embodiments, the composite fuel oil additive may further include one or more components selected from the group consisting of a cetane number improver, a dispersant, a fatty acid, and a solvent.

[0011] In some embodiments, the cetane number improver in the composite fuel oil additive is selected from alkyl nitrates and / or di-tert-butyl peroxide;

[0012] Optionally, the alkyl nitrate in the cetane number improver is selected from one or more of isooctyl nitrate, amyl nitrate, octyl nitrate, heptyl nitrate, nonyl nitrate, cyclohexyl nitrate and isopropyl nitrate;

[0013] Optionally, the cetane number improver is added in an amount of 5-10 parts by mass.

[0014] In some embodiments, the dispersant in the composite fuel oil additive is selected from one or more of polyetheramine, polyisobutylene succinimide and succinimide;

[0015] Optionally, the average molecular weight of the polyetheramine is 600-2000;

[0016] Optionally, the dispersant is added in an amount of 5-15 parts by mass.

[0017] In some embodiments, the fatty acid in the composite fuel oil additive is selected from one or more of oleic acid, linoleic acid, linolenic acid and coconut oleic acid;

[0018] Optionally, the fatty acid is added in an amount of 10-15 parts by mass.

[0019] In some embodiments, the solvent in the composite fuel oil additive is selected from aromatic solvents;

[0020] Optionally, the aromatic hydrocarbon solvent is selected from one or more of toluene, xylene and mixed tetramethylbenzenes;

[0021] Optionally, the fatty acid is added in an amount of 30-65 parts by mass.

[0022] In some embodiments, the composite fuel oil additive may further include the following components in parts by weight:

[0023] 1-8 parts of metal octanoate,

[0024] 5-10 parts of cetane number improver,

[0025] 1-5 parts of transition metal ion compound,

[0026] Surfactant 15-20 parts,

[0027] Dispersant 5-15 parts,

[0028] 10-15 parts of fatty acids, and

[0029] 30-65 parts of solvent.

[0030] In a second aspect, the present invention also provides a fuel oil comprising a composite fuel oil additive.

[0031] The fuel oil has the effects of increasing the starting speed of the engine, increasing the engine power, reducing the residual carbon content in the engine oil pipeline, reducing the engine carbon emission, reducing the wear degree of the engine and extending the service life of the engine.

[0032] In a third aspect, the present invention also provides the use of fuel oil containing the composite fuel oil additive in fields including but not limited to ships.

[0033] Compared with the prior art, the beneficial effects of the present invention include:

[0034] The present invention adopts a composite fuel oil additive prepared by including isooctanoic acid metal, transition metal ion compound and a specific type of surfactant. The additive can significantly improve the combustion efficiency and utilization rate of fuel / fuel oil, improve the stability of fuel oil components, enable the fuel / fuel oil to be fully burned, reduce the generation of carbon emission particles, and help clean and decompose residual carbon deposits in the fuel / fuel oil engine, reduce the abrasive wear of the engine, and improve the working efficiency of the engine; at the same time, the composite fuel oil additive of the present invention is also green and economical, and is suitable for industrial production and application. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the preferred embodiments of the present invention are given below to more fully describe the technical solution of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0036] It should be noted that the experimental methods in the following examples of the present invention without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturers. The various commonly used chemical reagents used in the examples are all commercially available products.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] Fuel oil can be used in shipping and other transportation fields. It is the main source of power. It has a high energy density and can meet the needs of long-term and long-distance navigation. At present, the combustion performance and stability of fuel oil are poor. The main reasons for the low combustion performance of fuel oil are:

[0039] (1) High aromatic content is a characteristic of fuel oil. Diesel engines generally use compression ignition. Fuel oil is injected into the cylinder through the fuel injector and starts burning by relying on the automatic ignition of the fuel oil. Aromatic compounds have a high ignition temperature, and as the aromatic content increases, the ignition of the fuel becomes more and more difficult. When the ignition temperature is close to the cylinder temperature, it is difficult to start the engine.

[0040] (2) High asphaltene and high residual carbon content are another characteristic of fuel oil. Asphaltene is the main cause of clogging fuel filters and fuel supply system pipelines. It may also contain various metal salts and impurities. In addition, asphaltene has a low calorific value and is difficult to fully burn, which prolongs the combustion cycle and reduces engine power. Asphaltene also often accumulates in the exhaust pipe, hindering the smooth flow of exhaust, increasing exhaust resistance and reducing engine power. High residual carbon content will increase the particulate matter content in the exhaust, especially for engines using exhaust gas recirculation (EGR), which will increase the abrasive wear of the engine.

[0041] On the other hand, the main reason for the poor stability of fuel oil is that the improvement of oil refining technology has deteriorated the quality of residual oil, causing the residual oil to contain more unstable components. Unstable components will disperse into colloids and settle in the oil phase, destroying the original homogeneity of the fuel oil and the continuity of the combustion state. In severe cases, it will also cause blockage of the oil transportation system.

[0042] Therefore, in order to improve the combustion efficiency and stability of fuel oil, and at the same time to clean carbon deposits and reduce corrosiveness, the present invention provides a composite fuel oil additive, wherein the composite fuel oil additive comprises 1-8 parts by weight of isooctanoic acid metal, 1-5 parts by weight of transition metal ion compound and 15-20 parts by weight of surfactant;

[0043] The surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonylnaphthalene sulfonic acid and dodecylbenzene sulfonic acid.

[0044] In order to improve the combustion efficiency of fuel and / or fuel oil, the present invention adds isooctanoic acid metal to the composite fuel oil additive, which can be activated so that its own electrons are transferred to become an electron donor, metal ions form holes, and the electronic structure of the carbon surface also changes. This charge migration will accelerate certain reactions and has a significant combustion-supporting effect, thereby increasing the speed of the entire reaction and making the carbon burn more completely.

[0045] In order to improve the combustion of fuel and / or fuel oil, the present invention adds a transition metal ion compound to the composite fuel oil additive. Under heating conditions, the transition metal ion compound is first reduced to a metal, and then the metal absorbs oxygen to oxidize the metal to an oxide, and then the carbon directly reduces the metal oxide. In this way, the metal is always in a redox cycle, switching back and forth between the metal and oxide states, and oxygen atoms are continuously transferred from the metal to the carbon atoms, which accelerates the diffusion rate of oxygen, has a significant combustion-supporting effect, and makes combustion easier.

[0046] In order to improve the stability of fuel and / or fuel oil, the present invention adds a surfactant to the composite fuel oil additive, and the surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonylnaphthalene sulfonic acid and dodecylbenzene sulfonic acid. As the temperature rises, the stability of the fuel oil decreases significantly, asphaltene deposition causes blockage of the oil port and the oil pipeline, and the fuel oil burns incompletely. The surfactant in the present invention can effectively inhibit the conversion between colloid and asphaltene in the fuel oil, and can greatly improve the stability of the colloid, so that the asphaltene is stably dispersed in the oil, further solving the problem of low combustion efficiency.

[0047] The composite fuel oil additive prepared by the present invention plays a combustion-supporting role for fuel / fuel oil by compounding isooctanoic acid metal and transition metal ion-type compound, and can improve fuel speed and fuel utilization rate. Further, by adding a specific type of surfactant, the isooctanoic acid metal and transition metal ion-type compound can be better dissolved and dispersed in the solvent, so that the composite fuel oil additive can be evenly dispersed in the fuel oil, which significantly improves the stability of the fuel oil and the combustion-supporting role of the isooctanoic acid metal and transition metal ion-type compound in the fuel oil.

[0048] Based on this, the present invention provides a composite fuel oil additive, which comprises 1-8 parts by mass of isooctanoic acid metal, 1-5 parts by mass of transition metal ion compound and 15-20 parts by mass of surfactant; the surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonylnaphthalenesulfonic acid and dodecylbenzenesulfonic acid.

[0049] In some embodiments, the isooctanoic acid metal is selected from one or more of lanthanum isooctanoate, cerium isooctanoate, calcium isooctanoate, manganese isooctanoate, zinc isooctanoate, cobalt isooctanoate, iron isooctanoate, barium isooctanoate, copper isooctanoate and magnesium isooctanoate, which can improve the speed of the entire reaction, make the carbon burn more completely, and have a significant combustion-supporting effect. Further, the isooctanoic acid metal is selected from lanthanum isooctanoate, which has a more obvious combustion-supporting effect and can better achieve the combustion effect of fuel and / or fuel oil.

[0050] In some embodiments, the transition metal ion compound is selected from one or more of ferrocene, carbonyl iron, carbonyl cobalt, ferrocyanide compounds, cobalt cyanide compounds, iron nitrogen compounds and chromium nitrogen compounds, which can accelerate the diffusion of oxygen, have a significant combustion-supporting effect, and make combustion easier. Further, the transition metal ion compound is selected from ferrocene, the oxidation-reduction process is faster, the oxygen diffusion rate is faster, the combustion-supporting effect is more obvious, and the combustion effect of fuel and / or fuel oil can be better achieved.

[0051] In some embodiments, the nonylphenol polyoxyethylene ether model includes NP-10 and / or NP-40. Further, the nonylphenol polyoxyethylene ether model includes NP-10, which has a better effect on improving the stability of the colloid, making the asphaltene dispersed in the oil better, so that the fuel and / or fuel oil can achieve better stability, and further solve the problem of low combustion efficiency.

[0052] In some embodiments, the composition of the composite fuel oil additive may also include: 1-8 parts by mass of lanthanum isooctanoate, 1-5 parts by mass of ferrocene, and 15-20 parts by mass of nonylphenol polyoxyethylene ether.

[0053] The metal isooctanoate, transition metal ion compound and surfactant in the composite fuel oil additive formula prepared by the present invention need to achieve good combustion-supporting and stabilizing effects within a certain compounding range, such as:

[0054] The addition amount of the metal isooctanoate includes but is not limited to 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0055] The addition amount of the transition metal ionic compound includes but is not limited to 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0056] The amount of the surfactant added includes but is not limited to 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0057] In some embodiments, the composite fuel oil additive may further include one or more components selected from the group consisting of a cetane number improver, a dispersant, a fatty acid, and a solvent.

[0058] In some embodiments, the cetane number improver in the composite fuel oil additive is selected from alkyl nitrates and / or di-tert-butyl peroxide; the added cetane number improver has the effect of increasing the cetane number of the fuel / fuel oil and shortening the ignition delay period of the fuel / fuel oil. This type of cetane number improver provides free radical compounds during the combustion process of the fuel / fuel oil. These free radical compounds participate in the oxidation and decomposition reactions of the fuel / fuel oil, and initiate an oxidation chain reaction centered on the free radicals, greatly reducing the spontaneous combustion activation energy of the fuel / fuel oil, shortening the ignition delay period, and improving the spontaneous combustion of the fuel / fuel oil when burning in the engine, improving the cold start performance of the engine, and reducing combustion noise and pollution emissions of the diesel engine.

[0059] In some embodiments, the alkyl nitrates are selected from one or more of isooctyl nitrate, amyl nitrate, octyl nitrate, heptyl nitrate, nonyl nitrate, cyclohexyl nitrate and isopropyl nitrate. The present invention adds an alkyl nitrate type cetane number improver in the composite fuel oil additive formula to improve the cetane number of the fuel / fuel oil and shorten the ignition delay period of the fuel / fuel oil. It is more effective to improve the combustion performance of the fuel / fuel oil, and can also shorten the ignition time, improve the thermal working condition dynamics of the locomotive, and the fuel saving effect is very obvious; secondly, the alkyl nitrates in the composite fuel oil additive formula of the present invention can also play a role in improving the solubility of isooctyl metals and transition metal ion compounds, so that they can play a better combustion-supporting effect. Further, the isooctyl nitrate in the alkyl nitrates can better achieve the above-mentioned beneficial effects.

[0060] Optionally, the amount of the cetane number improver added is 5-10 parts by mass, including but not limited to 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0061] In some embodiments, the dispersant in the composite fuel oil additive is selected from one or more of polyetheramine, polyisobutylene succinimide and succinimide; the dispersant can effectively control the carbon deposits in the engine combustion chamber by attaching to the porous carbon deposits, destroying the adhesion of the carbon deposits, and decomposing the carbon deposits layer by layer. Secondly, the addition of the dispersant can adsorb and disperse small solid particles such as carbon deposits in the oil, preventing these substances from further agglomerating into large particles and adhering to the engine, or depositing as sludge, thereby keeping the metal surfaces of the engine piston and other parts clean and improving the starting speed and operating efficiency of the engine. Further, the dispersant selects a polyetheramine with an average molecular weight of 600-2000 to better achieve the effect of removing and decomposing carbon deposits. In addition, the present invention can further promote the adhesion of the dispersant on the carbon deposits by adding a specific surfactant to the composite fuel oil additive, thereby further improving the cleaning and decomposition effect of carbon deposits inside the engine.

[0062] Optionally, the amount of dispersant added is 5-15 parts by mass, including but not limited to 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0063] In some embodiments, the fatty acid in the composite fuel oil additive is selected from one or more of oleic acid, linoleic acid, linolenic acid and coconut oleic acid. The added fatty acid has good lubrication and can reduce the friction of fuel oil on the engine and other equipment during combustion, thereby protecting the equipment and extending the service life. The fatty acid is green and environmentally friendly, and is added in an amount of 10-15 parts by mass, including but not limited to 10, 10.5, 11, 11.5, 12, 12.5, 13, 13.5, 14, 14.5, 15 parts by mass or any range formed by any two of the foregoing and any value within the range. Adding to fuel / fuel oil will not cause environmental pollution.

[0064] Optionally, the fatty acid addition amount

[0065] In some embodiments, the solvent in the composite fuel oil additive is selected from aromatic solvents, and the aromatic solvent is selected from one or more of toluene, xylene and mixed tetramethylbenzenes, which have a good dissolving effect on isooctanoic acid metals and transition metal ion compounds.

[0066] Optionally, optionally, the fatty acid addition amount is 30-65 parts by mass, including but not limited to 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65 parts by mass or a range formed by any two of the foregoing and any value within the range.

[0067] In some embodiments, the composite fuel oil additive comprises the following components in parts by weight:

[0068] 1-8 parts of metal octanoate,

[0069] 5-10 parts of cetane number improver,

[0070] 1-5 parts of transition metal ion compound,

[0071] Surfactant 15-20 parts,

[0072] Dispersant 5-15 parts,

[0073] 10-15 parts of fatty acids, and

[0074] 30-65 parts of solvent.

[0075] In some embodiments, the composite fuel oil additive comprises the following components in parts by weight:

[0076] 1-8 parts of lanthanum 2-octanoate,

[0077] 5-10 parts of cetane number improver,

[0078] 1-5 parts of ferrocene,

[0079] Nonylphenol polyoxyethylene ether NP-10 and / or

[0080] Nonylphenol polyoxyethylene ether NP-40 15-20 parts,

[0081] Dispersant 5-15 parts,

[0082] 10-15 parts of oleic acid, and

[0083] Toluene 30-65 parts.

[0084] In some embodiments, the composite fuel oil additive comprises the following components in parts by weight:

[0085] 1-8 parts of lanthanum 2-octanoate,

[0086] 5-10 parts of 2-ethylhexyl nitrate

[0087] 1-5 parts of ferrocene,

[0088] Nonylphenol polyoxyethylene ether NP-10 15-20 parts,

[0089] Polyetheramine 5-15 parts,

[0090] 10-15 parts of oleic acid, and

[0091] Toluene 30-65 parts.

[0092] In some preferred embodiments, the composite fuel oil additive may also include the following components in parts by weight:

[0093] 3-8 parts of metal octanoate,

[0094] 5-10 parts of cetane number improver,

[0095] 1-5 parts of transition metal ion compound,

[0096] Surfactant 15-20 parts,

[0097] Dispersant 5-10 parts,

[0098] 10-15 parts of fatty acids, and

[0099] 30-65 parts of solvent.

[0100] In addition, the present invention also provides a fuel oil comprising the composite fuel oil additive as described above. By adding the composite fuel oil additive to the fuel oil, a fuel oil with high combustion efficiency and stability is obtained. The fuel oil has the effects of increasing the starting speed of the engine, increasing the engine power, reducing the residual carbon content in the engine oil pipeline, reducing the engine carbon emission, reducing the wear degree of the engine, and extending the service life of the engine.

[0101] The present invention also provides a use of the above-mentioned fuel oil in an engine.

[0102] The present invention also provides the use of the fuel oil containing the composite fuel oil additive in fields including but not limited to ships.

[0103] Example 1. Preparation of composite fuel oil additive

[0104] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0105] 8 parts of lanthanum 2-octanoate,

[0106] 10 parts of 2-ethylhexyl nitrate,

[0107] 3 parts of ferrocene,

[0108] Nonylphenol polyoxyethylene ether (NP-10) 15 parts,

[0109] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0110] 10 parts of oleic acid, and

[0111] 44 parts of toluene.

[0112] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0113] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0114] Example 2: Preparation of composite fuel oil additive

[0115] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0116] 8 parts of lanthanum 2-octanoate,

[0117] 10 parts of 2-ethylhexyl nitrate,

[0118] 3 parts of ferrocene,

[0119] 15 parts of dinonylnaphthalenesulfonic acid,

[0120] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0121] 10 parts of oleic acid, and

[0122] 44 parts of toluene.

[0123] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0124] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0125] Example 3: Preparation of composite fuel oil additive

[0126] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0127] 8 parts of lanthanum 2-octanoate,

[0128] 10 parts of 2-ethylhexyl nitrate,

[0129] 3 parts of ferrocene,

[0130] Nonylphenol polyoxyethylene ether (NP-40) 15 parts,

[0131] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0132] 10 parts of oleic acid, and

[0133] 44 parts of toluene.

[0134] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0135] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0136] Example 4: Preparation of composite fuel oil additive

[0137] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0138] 8 parts of lanthanum 2-octanoate,

[0139] 10 parts of 2-ethylhexyl nitrate,

[0140] 3 parts of ferrocene,

[0141] 15 parts of dodecylbenzenesulfonic acid,

[0142] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0143] 10 parts of oleic acid, and

[0144] 44 parts of toluene.

[0145] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0146] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0147] Example 5. Preparation of composite fuel oil additive

[0148] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0149] 8 parts of zinc 2-ethylhexanoate,

[0150] 10 parts of 2-ethylhexyl nitrate,

[0151] 3 parts of ferrocene,

[0152] Nonylphenol polyoxyethylene ether (NP-10) 15 parts,

[0153] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0154] 10 parts of oleic acid, and

[0155] 44 parts of toluene.

[0156] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0157] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0158] Example 6: Preparation of composite fuel oil additive

[0159] The composite fuel oil additive of this embodiment specifically includes the following components in parts by mass:

[0160] 8 parts of lanthanum 2-octanoate,

[0161] 10 parts of 2-ethylhexyl nitrate,

[0162] 3 parts of pentacarbonyl iron,

[0163] Nonylphenol polyoxyethylene ether (NP-10) 15 parts,

[0164] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0165] 10 parts of oleic acid, and

[0166] 44 parts of toluene.

[0167] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0168] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0169] Comparative Example 1: Preparation of composite fuel oil additive

[0170] The composite fuel oil additive of this comparative example specifically includes the following components by weight:

[0171] 8 parts of lanthanum 2-octanoate,

[0172] 10 parts of 2-ethylhexyl nitrate,

[0173] 3 parts of ferrocene,

[0174] Polyetheramine (average molecular weight 1000-1400) 10 parts,

[0175] 10 parts of oleic acid, and

[0176] Toluene 59 parts.

[0177] The above ingredients are mixed according to the formula to prepare a composite fuel oil additive, and the specific steps are as follows:

[0178] The above ingredients were added into a three-necked flask in order, heated to 45°C, stirred for 0.5h and then discharged to obtain a composite fuel oil additive.

[0179] Comparative Example 2

[0180] The difference from Example 1 is that nonylphenol polyoxyethylene ether (NP-10) in the composite fuel oil additive formula is replaced by dodecylpyridinium bromide in equal parts by mass, and the remaining formula composition, content and preparation method are consistent with those in Example 1.

[0181] Comparative Example 3

[0182] The difference from Example 1 is that nonylphenol polyoxyethylene ether (NP-10) in the composite fuel oil additive formula is replaced by octylphenol polyoxyethylene ether (OP-15) in an equal amount by weight, and the remaining formula composition, content and preparation method are consistent with Example 1.

[0183] Comparative Example 4

[0184] The difference from Example 1 is that the amount of isooctanoic acid metal added in the composite fuel oil additive formula is 10wt% of the total mass, the amount of transition metal ion compound added is 0.5wt% of the total mass, the toluene content is 44.5wt%, and the remaining formula composition, content and preparation method are consistent with Example 1.

[0185] Comparative Example 5

[0186] The difference from Example 1 is that the amount of isooctanoic acid metal added in the composite fuel oil additive formula is 0.5wt% of the total mass, the amount of transition metal ion compound added is 6wt% of the total mass, the toluene content is 48.5wt%, and the remaining formula composition, content and preparation method are consistent with Example 1.

[0187] Comparative Example 6

[0188] The difference from Example 1 is that the amount of nonylphenol polyoxyethylene ether (NP-10) added in the composite fuel oil additive formula is 25wt% of the total mass, the toluene content is 34wt%, and the remaining formula composition, content and preparation method are consistent with Example 1.

[0189] Test Example 1: Fuel Oil Stability Test

[0190] The composite fuel oil additive prepared in Examples 1 to 6 was used in heavy fuel oil to obtain oil products 1 to 6, and the composite fuel oil additive prepared in Comparative Examples 1 to 6 was used in heavy fuel oil to obtain oil products 7 to 12. The addition amount of the composite fuel oil additive was 0.0002wt% (200ppm). Then, the fuel oil containing the composite fuel oil additive, the fuel oil not containing the composite fuel oil additive, and the commercially available oil products were tested for oil stability. The test was conducted using ASTM D7061-2006 (K value method). The evaluation criteria are shown in Table 1:

[0191] Table 1: Oil stability evaluation criteria

[0192]

[0193] The results of the oil stability evaluation using the above test method are shown in Table 2:

[0194] Table 2: Oil stability evaluation results

[0195]

[0196] It can be seen from the results in Table 2 that: compared with commercially available oils, the dispersibility value of the oil products added with the composite fuel oil additive of the present invention is significantly reduced, asphaltene can be stably dispersed in the fuel oil, and the stability of the oil products is greatly improved. It can be seen that the composite fuel oil additive prepared by the present invention can significantly improve the stability of the oil products; secondly, the dispersibility of oil products 1 to 6 is good, while the dispersibility of oil products 7 to 12 is relatively poor. This is mainly due to the difference in the content of the ingredients of each component in the formula affecting the compatibility of the components in the formula, thereby affecting the overall performance of the composite fuel oil additive.

[0197] Test Example 2: Fuel Oil Combustion Efficiency Test

[0198] The composite fuel oil additive prepared in Examples 1 to 6 was used in heavy fuel oil to obtain oil products 1 to 6, and the composite fuel oil additive prepared in Comparative Examples 1 to 6 was used in heavy fuel oil to obtain oil products 7 to 12. The addition amount of the composite fuel oil additive was 0.0002wt% (200ppm). Then, the fuel oil containing the composite fuel oil additive, the fuel oil not containing the composite fuel oil additive, and the commercially available oil products were tested for combustion efficiency. The test was conducted using GB / T33304-2016 (thermogravimetric analysis method). The thermogravimetric curve (TG curve) and the differential thermogravimetric curve (DTG curve) were analyzed by a thermogravimetric analyzer to evaluate the combustion efficiency. The specific results are shown in Table 3:

[0199] Table 3: Oil combustion efficiency results

[0200]

[0201] From the results in Table 3, it can be seen that the combustion efficiency of the oil products added with the composite fuel oil additive of the present invention can reach a level basically equal to or higher than that of commercially available oil products, and has good combustion characteristics; secondly, compared with the oil products without the composite fuel oil additive, the combustion efficiency of the oil products can be greatly improved by adding the composite fuel oil additive prepared by the present invention. In addition, from the results of oil products 1 to 6, it is found that the combustion performance of oil products 1 to 6 is better than that of oil products 7 to 12, which shows that the difference in the content of the components of each component in the formula has a significant effect on the overall combustion performance of the composite fuel oil additive.

[0202] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0203] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A composite fuel oil additive, characterized in that: The composite fuel oil additive comprises 1-8 parts by weight of isooctanoic acid metal, 1-5 parts by weight of transition metal ion compound and 15-20 parts by weight of surfactant; The surfactant is selected from one or more of nonylphenol polyoxyethylene ether, dinonylnaphthalene sulfonic acid and dodecylbenzene sulfonic acid.

2. The composite fuel oil additive according to claim 1, characterized in that: The composite fuel oil additive includes at least one of the following (1) to (3): (1) The isooctanoic acid metal is selected from one or more of lanthanum isooctanoate, cerium isooctanoate, calcium isooctanoate, manganese isooctanoate, zinc isooctanoate, cobalt isooctanoate, iron isooctanoate, barium isooctanoate, copper isooctanoate and magnesium isooctanoate; (2) The transition metal ion compound is selected from one or more of ferrocene, carbonyl iron, carbonyl cobalt, ferrocyanide compounds, cobalt cyanide compounds, iron nitrogen compounds and chromium nitrogen compounds; (3) The nonylphenol polyoxyethylene ether models include NP-10 and / or NP-40.

3. The composite fuel oil additive according to claim 2, characterized in that: The composite fuel oil additive comprises 1-8 parts by mass of lanthanum isooctanoate, 1-5 parts by mass of ferrocene and 15-20 parts by mass of nonylphenol polyoxyethylene ether.

4. The composite fuel oil additive according to any one of claims 1 to 3, characterized in that: The composite fuel oil additive also comprises one or more components of a cetane number improver, a dispersant, a fatty acid and a solvent.

5. The composite fuel oil additive according to claim 4, characterized in that: The composite fuel oil additive includes at least one of the following (1) to (8): (1) The cetane number improver is selected from alkyl nitrates and / or di-tert-butyl peroxide; (2) The cetane number improver is added in an amount of 5-10 parts by weight; (3) The dispersant is selected from one or more of polyetheramine, polyisobutylene succinimide and succinimide; (4) The dispersant is added in an amount of 5-15 parts by weight; (5) The fatty acid is selected from one or more of oleic acid, linoleic acid, linolenic acid and coconut oleic acid; (6) The fatty acid is added in an amount of 10-15 parts by weight; (7) The solvent is selected from aromatic hydrocarbon solvents; (8) The amount of solvent added is 30-65 parts by weight.

6. The composite fuel oil additive according to claim 5, characterized in that: The composite fuel oil additive includes at least one of the following (1) to (3): (1) The alkyl nitrate is selected from one or more of isooctyl nitrate, amyl nitrate, octyl nitrate, heptyl nitrate, nonyl nitrate, cyclohexyl nitrate and isopropyl nitrate; (1) The average molecular weight of the polyetheramine is 600-2000; (3) The aromatic hydrocarbon solvent is selected from one or more of toluene, xylene and mixed tetramethylbenzene.

7. The composite fuel oil additive according to claim 4, characterized in that: The composition includes the following components by mass: 1-8 parts of metal octanoate, 5-10 parts of cetane number improver, 1-5 parts of transition metal ion compound, Surfactant 15-20 parts, Dispersant 5-15 parts, 10-15 parts of fatty acids, and 30-65 parts of solvent.

8. A fuel oil comprising the composite fuel oil additive according to any one of claims 1 to 7.

9. Use of the fuel oil as claimed in claim 8 in an engine.

10. Use of the fuel oil according to claim 8 in a ship device.

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