Low-carbon marine fuel oil stabilizer, low-carbon marine fuel and preparation method thereof

Abstract

The application discloses a low-carbon marine fuel oil stabilizer, low-carbon marine fuel and a preparation method thereof. The stabilizer comprises, in percentage by weight, 1-15% of a fatty amine, 1.5-5% of a fatty acid ester, 10-20% of an alcohol, 0.1-3% of an alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether, 10-30% of an amphiphilic block polymer, 5-10% of Tween, 3-10% of a defoaming agent, and the rest of hydrogenated white oil. The stabilizer has the characteristics of emulsification and solubilization, and has the effects of improving compatibility and increasing system stability on blending of low-carbon components into marine fuel oil.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fuel oil blending, and particularly relates to a low-carbon marine fuel oil stabilizer and a preparation and application method thereof. BACKGROUND

[0002] Traditional fuel oil production in China mostly adopts straight-run, vacuum distillation residual oil as a base raw material, which is blended with heavy distillates on the production line. In recent years, in order to compress the blending cost, oil slurry and shale oil are used as base raw materials, which are blended with residual oil, asphalt and other raw materials. Such raw materials contain high-molecular-weight condensed aromatic asphaltene with heteroatoms, which can precipitate and deposit during oil transportation, storage and use, causing adverse consequences.

[0003] Patent ZL200810150454.1 discloses a vehicle methanol diesel stabilizing synergistic additive. A certain amount of n-octanol, n-pentanol, oleic acid, naphthenic acid, Span 80 and acrylate are sequentially fed into a reaction kettle, and are fully and uniformly mixed under slow stirring. Then, a certain amount of triethanolamine is gradually added under cooling conditions, and is fully stirred to obtain a product, which is used to improve the flash point and cetane number of methanol diesel. The purpose of the invention is to stabilize methanol diesel, but it is not suitable for marine fuel oil systems.

[0004] Patent CN201910742166.3 discloses a high-purity methanol diesel for marine diesel engines. The invention provides a methanol diesel for improving the safety and heat value of alcohol-based fuel, and replacing petrochemical 0# diesel. However, the invention directly mixes the additive with methanol and ethanol to obtain fuel oil, and cannot be used as a stabilizing additive for conventional marine fuel oil systems.

[0005] In order to improve the storage and transportation stability of low-carbon marine fuel oil systems after blending, a low-carbon marine fuel oil stabilizer needs to be developed. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a low-carbon marine fuel oil stabilizer, a low-carbon marine fuel and a preparation method thereof. The stabilizer has the characteristics of emulsification and solubilization, and has the effects of improving compatibility and increasing system stability for low-carbon component blended marine fuel oil.

[0007] According to a first aspect of the present application, a low-carbon marine fuel oil stabilizer is provided.

[0008] A low-carbon marine fuel oil stabilizer comprises, by weight percentage, 1-15% of a fatty amine, 1.5-5% of a fatty acid ester, 10-20% of an alcohol, 0.1-3% of an alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether, 10-30% of an amphiphilic block polymer, 5-10% of Tween, 3-10% of a defoaming agent, and the rest of hydrogenated white oil.

[0009] In the present application, the fatty amine is a primary amine, preferably at least one of ethylenediamine, propylenediamine, butylenediamine, pentanediamine or hexanediamine.

[0010] In the present application, the fatty acid ester comprises one or a mixture of several of fatty acid methyl ester, fatty acid ethyl ester, and the carbon chain of the fatty acid is between 12 and 18.

[0011] In the present application, the alcohol is a normal or isomeric alcohol with a carbon atom chain length of 4-9.

[0012] In the present application, the alkyl phenol in the alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether is selected from alkyl with a carbon number of 8-18. The addition number ratio of polyoxyethylene and polyoxypropylene is 50:50-95:5, and the polymerization degree n of the polyoxyethylene group (-(CH2CH2O) n ) is 10-90.

[0013] In the present application, the amphiphilic block polymer is a diblock copolymer of polyisobutylene succinic anhydride and polyalkylene glycol or polyoxyalkylene. The content of polyisobutylene succinic anhydride unit is 30%-60%, and the molecular weight is 15000-500000.

[0014] In the present application, the Tween is one or a mixture of both of Tween-60 series and Tween-80 series.

[0015] In the present application, the defoaming agent is one or more of polyether type defoaming agent, silicone type defoaming agent, and polyether modified silicone type, preferably polyether modified silicone oil. In the present application, the hydrogenated white oil is an industrial grade white oil with a grade of 5#, 7#, 10#, 15#, 22#, 32#, 46#, 68#, and one or more of them can be used.

[0016] The marine fuel oil stabilizer of the present application is designed to solve the problems of poor compatibility and easy delamination in the low-carbon system formed by adding methanol to residual oil, by using measures such as promoting methanol modification, emulsification, dispersion, and adding multiple additives.

[0017] In the present application, the fatty amine is used to emulsify the asphaltene in residual oil, improve the pH value of the compounded stabilizer, and improve the overall compounding effect.

[0018] The alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether has emulsifying and viscosity reducing effects on residual oil, is conducive to the mixing of residual oil and other oil products, can play a synergistic effect with fatty amines, and effectively improves the emulsification degree of thick oil.

[0019] In the application, the alcohol is a cosolvent of methanol, which improves the compatibility of methanol with other component oils.

[0020] In the application, the amphiphilic block polymer is a copolymer having a hydrophobic unit and a hydrophilic unit, the polyisobutylene chain in the molecule has good compatibility with oil phase, and can play a role in a wide temperature range, in addition, the hydroxyl and ether groups in the hydrophilic block of the molecule can form hydrogen bonds with methanol, so that the compatibility of methanol with oil phase is improved. The combination of alcohol and amphiphilic block polymer enables methanol to form a large number of intermolecular hydrogen bonds with the system and be adsorbed with each other.

[0021] In the application, the defoaming agent is uniformly dispersed in the system by the “self-emulsification” generated by the hydrophobic and hydrophilic properties of the molecular structure, and stably plays the functions of foam inhibition and defoaming of the surfactant component.

[0022] In the application, the hydrogenated white oil as a solvent oil has the characteristics of small viscosity, low pour point, especially high flash point (closed), stable properties, and high temperature resistance, and is an excellent solvent for stabilizers.

[0023] According to a second aspect of the application, the application also provides a preparation method of the above-mentioned low-carbon marine fuel oil stabilizer.

[0024] Specifically, the preparation method of the above-mentioned low-carbon marine fuel oil stabilizer comprises the following contents:

[0025] (1) First, mix and stir the alcohol, amphiphilic block polymer and part of the hydrogenated white oil uniformly to obtain solution A;

[0026] (2) At T1 temperature, mix and stir the fatty amine, fatty acid ester and the remaining part of the hydrogenated white oil uniformly to obtain solution B;

[0027] (3) Under T1 temperature and continuous stirring, first add the defoaming agent to B and mix uniformly, then add the alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether after uniform mixing, stir uniformly, finally add Tween and mix uniformly to obtain a mixed solution C;

[0028] (4) Mix solution A and solution C at temperature T2 and stir for 1.5-3 hours;

[0029] (5) After stirring, cool to room temperature to obtain the low-carbon marine fuel oil stabilizer.

[0030] Further, T1 is 60-100℃; T2 is 40-60℃.

[0031] According to a third aspect of the present application, the present application provides a low-carbon marine fuel oil containing the above-mentioned stabilizer.

[0032] The low-carbon marine fuel oil comprises, in percentage by weight: 1% to 20% of methanol, 5% to 20% of light component oil, 70% to 89% of residual oil, and 1% to 10% of stabilizer.

[0033] Further, the light component oil can be one or a mixture of several of catalytic diesel, diesel, coal diesel, hydrorefined wax oil, C9, and C10. The viscosity of the light component oil ranges from 2 to 10 mm 2 / s, and the density at 20℃ ranges from 0.92 to 0.985 g / cm 3 .

[0034] Further, the residual oil has a viscosity at 50℃ ranging from 800 to 35000 mm 2 / s, and a density at 20℃ ranging from 0.93 to 0.99 g / cm 3 .

[0035] According to a fourth aspect of the present application, the present application further provides a preparation method of the above-mentioned low-carbon marine fuel oil.

[0036] Specifically, the preparation method comprises the following steps:

[0037] (a) adding a certain amount of stabilizer into methanol, homogenizing by an emulsifying machine to obtain a mixed solution M;

[0038] (b) slowly adding the mixed solution M into the light component oil under stirring, continuously stirring for 30 to 90 min to obtain a fully emulsified mixed oil N;

[0039] (c) adding the mixed oil N into the residual oil at a certain rate under a certain temperature, stirring for more than 30 min to obtain a blended low-carbon marine fuel oil product.

[0040] Further, the rotating speed of the homogenizing head of the emulsifying machine in step (a) is not less than 2000 r / min.

[0041] Further, the temperature in step (c) is 50℃ to 80℃.

[0042] Further, the adding rate of the mixed oil N in step (c) is 25 to 100 milliliters per minute added into each liter of the mixture.

[0043] In the present application, the stabilizer is modified by methanol, emulsified and gradually mixed. The amphiphilic substance and the solubilizing component in the stabilizer are used to modify the methanol, so that the methanol is more easily emulsified with the hydrocarbons in the oil. The light component oil is first emulsified, and then slowly mixed with the heavy component, so that the emulsion molecules of the stabilizer / methanol / light component oil slowly diffuse into the heavy component oil, and finally form a uniform and stable low-carbon marine fuel oil.

[0044] Compared with the prior art, the present application has the following advantages:

[0045] 1. The present application uses a combination of two block polymers, one of which is a two-block copolymer of amphiphilic block polymer polyisobutylene succinic anhydride and polyalkylene glycol or polyoxyalkylene mixed with long-chain alcohol, and the methanol is modified by stirring for a long time. The methanol molecules are combined with the alcohol and the amphiphilic block polymer through the action of bonds to form long-chain molecular groups. In addition, due to the hydrocarbon effect of the alcohol carbon chain, it is easy to mix with the hydrocarbons in the oil. This bidirectional solubility effect increases the mixing and solubility of each component. At the same time, the components with emulsifying effect in the stabilizer promote the formation of a uniform and dispersed emulsion system, so that the methanol can be stably dispersed in the fuel oil. The other block polymer is alkylphenol polyoxyethylene-polyoxypropylene alcohol ether, which is mainly used for emulsification and viscosity reduction of residual oil.

[0046] 2. The preparation method of the stabilizer provided by the present application uses a step-by-step mixing method, first dissolving the fatty amine and fatty acid ester at high temperature, then adding the auxiliary agent and surfactant, and finally adding the mixture of alcohol and amphiphilic block polymer. This avoids the repulsion caused by different polarities, so that each component of the stabilizer can be uniformly mixed in each step, improving the solubility and stability of each component.

[0047] 3. In the use method of the stabilizer provided by the present application, a step-by-step mixing method is used. First, the methanol is mixed to modify and activate it, then it is mixed with light oil to improve its lipophilicity, and finally it is mixed with other heavy components to form a fuel oil stabilization system. On the one hand, the stabilizer activates the methanol, and on the other hand, it enhances the mixing effect of the stabilizer in each step, fully exerting the emulsifying and solubilizing effect of the stabilizer. Embodiment

[0048] The present application will be further illustrated by the following examples, but it does not constitute a limitation on the present application.

[0049] The fuel oil used in this example is different refinery residual oil and light component oil, and its main physicochemical properties are shown in Table 1.

[0050] Table 1 Physicochemical properties of some different refinery fuel oil

[0051] Item Resid 1 Light component oil 1 Resid 2 Light component oil 2 viscosity, mm 2 / s]]> 125.71 2.70 3430 9.3 Density, g / cm 3 ]] 0.9665 0.9291 0.9882 0.9793 Example 1

[0052] Mix 150 g of n-octanol, 200 g of polyisobutenyl succinic anhydride-polyoxyethylene with a content of 50% of polyisobutenyl succinic anhydride units and a molecular weight of 20,000, and 190 g of 22# hydrogenated white oil to obtain a mixture I. Mix 100 g of butanediamine, 20 g of methyl palmitate, and 200 g of 22# hydrogenated white oil at 85°C, then add 50 g of defoaming agent polyether-modified trisiloxane, mix well, then add 10 g of alkylphenol polyoxyethylene polyoxypropylene alcohol ether with an alkyl number of 9, an addition number ratio of polyoxyethylene and polyoxypropylene of 60:40, and a polymerization degree n of polyoxyethylene group (-(CH2CH2O)n-) of 50, mix well, then add 80 g of Tween 60, mix well, to obtain a mixture II. Stir the mixture I and the mixture II at 50°C for 2 hours, then cool to room temperature to obtain a low-carbon marine fuel oil stabilizer S1. n

[0053] Add 4 g of the stabilizer S1 to 12 g of methanol, emulsify and homogenize by using an emulsifying machine, the rotating speed of the emulsifying machine homogenizing head is 3000 r / min, then add the mixture to 10 g of light component oil 1 under stirring, continue stirring for 60 min, then add the fully emulsified mixture oil to 74 g of residual oil 1 at a rate of 50 ml / min per liter of mixture under airtight condition at 60°C, stir for more than 30 min to obtain a blended low-carbon marine fuel oil product C-1. The composition of the blended low-carbon marine fuel oil is: 12% of methanol, 10% of light component oil, 74% of residual oil, and 4% of stabilizer, by weight percentage. Example 2

[0054] Mix 180 g of isoamyl alcohol, 120 g of polyisobutenyl succinic anhydride-polyoxyethylene with a content of 40% of polyisobutenyl succinic anhydride units and a molecular weight of 400,000, and 240 g of 46# hydrogenated white oil to obtain a mixture I. Mix 20 g of propylenediamine, 40 g of ethyl laurate, and 230 g of 46# hydrogenated white oil at 95°C, then add 90 g of defoaming agent polyether-modified heptamethyl trisiloxane, mix well, then add 25 g of alkylphenol polyoxyethylene polyoxypropylene alcohol ether with an alkyl number of 16, an addition number ratio of polyoxyethylene and polyoxypropylene of 70:30, and a polymerization degree n of polyoxyethylene group (-(CH2CH2O)n-) of 20, mix well, then add 55 g of Tween 80, mix well, to obtain a mixture II. Stir the mixture I and the mixture II at 55°C for 2 hours, then cool to room temperature to obtain a low-carbon marine fuel oil stabilizer S2.

[0055] ​Stabilizer S2 was added to 1.5 g of methanol, and emulsified and homogenized by an emulsifier, the rotating speed of the homogenizer head of the emulsifier was 4000 r / min, then the mixture was added to 5.5 g of light component oil 2 under stirring, and stirred for 90 min, then the fully emulsified mixed oil was added to 86 g of residual oil 2 at a rate of 75 ml / min per liter of mixture under a closed condition at 75°C, and stirred for more than 30 min to obtain blended low-carbon marine fuel oil product C-2. The blended low-carbon marine fuel oil comprises, by weight percentage, 1.5% of methanol, 5.5% of light component oil, 86% of residual oil, and 7% of stabilizer. Example 3

[0056] 120 g of n-hexanol, 280 g of polyisobutenyl succinic anhydride-polyoxyethylene with a polyisobutenyl succinic anhydride unit content of 30% and a molecular weight of 50000, and 170 g of 7# hydrogenated white oil were mixed to obtain mixture I. 140 g of pentanediamine, 45 g of methyl stearate, and 160 g of 7# hydrogenated white oil were mixed at 75°C, then 30 g of defoaming agent polyether-modified polydimethylsiloxane was added and mixed, then 5 g of alkyl phenol polyoxyethylene polyoxypropylene alcohol ether with an alkyl number of 10, an addition number ratio of polyoxyethylene to polyoxypropylene of 80:20, and a polymerization degree n of polyoxyethylene group (-(CH2CH2O) n ) of 80 was added and mixed, and then 50 g of Tween 60 was added and mixed to obtain mixture II. Mixture I and mixture II were stirred at 45°C for 2 hours and then cooled to room temperature to obtain low-carbon marine fuel oil stabilizer S3.

[0057] Stabilizer S3 was added to 15 g of methanol, and emulsified and homogenized by an emulsifier, the rotating speed of the homogenizer head of the emulsifier was 3500 r / min, then the mixture was added to 13 g of light component oil 1 under stirring, and stirred for 30 min, then the fully emulsified mixed oil was added to 70 g of residual oil 2 at a rate of 30 ml / min per liter of mixture under a closed condition at 50°C, and stirred for more than 30 min to obtain blended low-carbon marine fuel oil product C-3. The blended low-carbon marine fuel oil comprises, by weight percentage, 15% of methanol, 13% of light component oil, 70% of residual oil, and 2% of stabilizer. Example 4

[0058] Mix 160 g of isoheptanol, 150 g of polyisobutenyl succinic anhydride-polyoxyethylene with a polyisobutenyl succinic anhydride unit content of 60% and a molecular weight of 150,000, and 220 g of 15# hydrogenated white oil to obtain a mixed solution I. Mix 70 g of ethylenediamine, 30 g of methyl laurate, and 220 g of 15# hydrogenated white oil at 70°C, then add 60 g of an antifoaming agent, polyether-modified trisiloxane, and mix well, then add 20 g of an alkylphenol polyoxyethylene polyoxypropylene alcohol ether with an alkyl number of 12, an addition number ratio of polyoxyethylene to polyoxypropylene of 90:10, and a polymerization degree n of 15 for polyoxyethylene groups (-(CH2CH2O) n -), and mix well, then add 70 g of Tween 80, and mix well to obtain a mixed solution II. Stir the mixed solution I and the mixed solution II at 50°C for 2 hours, and then cool to room temperature to obtain a low-carbon marine fuel oil stabilizer S4.

[0059] Add 3 g of the stabilizer S4 to 8 g of methanol, and homogenize by using an emulsifying machine at a rotation speed of 5000 r / min for the emulsifying machine homogenizer head, then add the mixed solution to 17 g of the light component oil 2 under stirring, and continue stirring for 50 min, then add the fully emulsified mixed oil to 72 g of the residual oil 1 at a rate of 60 ml / min per liter of the mixture under a closed condition at 55°C, and stir for 30 min or more to obtain a blended low-carbon marine fuel oil product C-4. The blended low-carbon marine fuel oil product has a composition of 8% of methanol, 17% of the light component oil, 72% of the residual oil, and 3% of the stabilizer, by weight percentage.

[0060] Comparative Example 1

[0061] Prepare the blended low-carbon marine fuel oil product D-1 according to the preparation method of Example 1, but without adding the alkylphenol polyoxyethylene-polyoxypropylene alcohol ether during the preparation.

[0062] Comparative Example 2

[0063] Prepare the blended low-carbon marine fuel oil product D-2 according to the preparation method of Example 1, but without adding the polyisobutenyl succinic anhydride-polyoxyethylene during the preparation.

[0064] Comparative Example 3

[0065] Prepare the blended low-carbon marine fuel oil product D-3 according to the preparation method of Example 1, but without adding the fatty amine and the fatty acid ester during the preparation.

[0066] Comparative Example 4

[0067] The formulation is consistent with Example 1, but the preparation of the stabilizer is changed to add n-octanol, polyisobutenyl succinic anhydride units at 50%, polyisobutenyl succinic anhydride-polyoxyethylene with a molecular weight of 20000, butanediamine, methyl palmitate, defoaming agent polyether modified trisiloxane, alkyl number 9, polyoxyethylene and polyoxypropylene addition number ratio 60:40, degree of polymerization n of polyoxyethylene group (-(CH2CH2O) n - ) is 50, and Tween 60 are uniformly mixed.

[0068] According to the formulation and method of blending low-carbon marine fuel oil product of Example 1, the above stabilizer is added to methanol, emulsified and homogenized by an emulsifier, and then the mixed solution is added to light component oil 1 under stirring, and stirring is continued for 60 min. Then, the fully emulsified mixed oil is added to residual oil 1 at a rate of 1 liter of mixture per liter of mixture under airtight conditions at 60°C, and stirring is continued for more than 30 min to obtain blended low-carbon marine fuel oil product D-4.

[0069] The stabilizer S1 is prepared according to the preparation method of Example 1, and the formulation is consistent with Example 1 during the blending of low-carbon marine fuel oil product, but the step is changed to mix and stir the stabilizer S1, methanol, light component oil 1 and residual oil 1 under airtight conditions at 60°C at the same time for more than 30 min to obtain blended low-carbon marine fuel oil product D-5.

[0070] The physicochemical properties and stability test results of the above examples and comparative example samples are shown in Table 2.

[0071] Table 2 Physicochemical properties and stability of examples and comparative example samples

[0072] Sample Viscosity, mm / s 2 (50°C) Density, kg / m3 3 (20°C) Storage stability C1 98.2 0.9630 > 30 days no separation C2 135.7 0.9875 > 30 days no separation C3 116.0 0.9581 > 30 days no separation C4 86.3 0.9672 > 30 days no separation D1 110.1 0.9721 8 days after separation D2 100.4 0.9533 3 days after separation D3 102.4 0.9700 12 days after separation D4 96.9 0.9691 10 days after separation D5 103.6 0.9701 8 days after separation

Claims

1. A low carbon marine fuel oil stabilizer characterized by, By weight percentage, including: fatty amine 1-15%, fatty acid esters 1.5-5%, alcohol 10-20%, alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether 0.1-3%, amphiphilic block polymer 10-30%, Tween 5-10%, defoaming agent 3-10%, the rest is hydrogenated white oil; The alcohol is a normal alcohol or an isomeric alcohol with a carbon chain length of 4-9; the amphiphilic block polymer is a diblock copolymer of polyisobutenyl succinic anhydride and polyalkylene glycol or polyalkylene oxide; The preparation method of the low-carbon marine fuel oil stabilizer comprises the following contents: (1) first, the alcohol, amphiphilic block polymer and part of the hydrogenated white oil are mixed and stirred uniformly to obtain solution A; (2) at temperature T1, the fatty amine, fatty acid esters and the remaining part of the hydrogenated white oil are mixed and stirred uniformly to obtain solution B; (3) under constant stirring at temperature T1, the defoaming agent is first added to solution B and mixed uniformly, then the alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether is added and stirred uniformly, and finally the Tween is added and mixed uniformly to obtain mixed solution C; (4) solution A and mixed solution C are mixed at temperature T2 and stirred for 1.5-3 hours; (5) cooled to room temperature to obtain the low-carbon marine fuel oil stabilizer.

2. The fuel oil stabilizer according to claim 1, characterized by, The fatty amine is a primary amine.

3. The fuel oil stabilizer according to claim 1, wherein The fatty amine is selected from at least one of ethylenediamine, propylenediamine, butylenediamine or hexylenediamine.

4. The fuel oil stabilizer according to claim 1, wherein The fatty acid esters include one or a mixture of several of fatty acid methyl ester, fatty acid ethyl ester, and the number of carbon atoms of the fatty acid is 12-18.

5. The fuel oil stabilizer according to claim 1, wherein The alkyl phenol in the alkyl phenol polyoxyethylene-polyoxypropylene alcohol ether is selected from alkyl with carbon number of 8-18, the addition number ratio of polyoxyethylene and polyoxypropylene is 50:50-95:5, and the polymerization degree n of polyoxyethylene group-(CH2CH2O) n is 10-90.

6. The fuel oil stabilizer according to claim 1, wherein In the diblock copolymer of polyisobutenyl succinic anhydride and polyalkylene glycol or polyalkylene oxide, the content of polyisobutenyl succinic anhydride unit is 30%-60%, and the molecular weight is 15000-500000.

7. The fuel oil stabilizer according to claim 1, wherein The Tween is selected from one or both of Tween-60 and Tween-80.

8. The fuel oil stabilizer according to claim 1, wherein T1 is 60-100℃, and T2 is 40-60℃.

9. A low carbon marine fuel oil characterized in that, Containing the stabilizer of any one of claims 1-8.

10. The low carbon marine fuel oil according to claim 9, characterized in that, The low-carbon marine fuel oil comprises, by weight percentage, methanol 1%-20%, light component oil 5-20%, residual oil 70%-89%, and stabilizer 1%-10%.

11. The low carbon marine fuel oil according to claim 10, characterized in that, viscosity of 2 to 10 mm 2 / s, density of 0.92 to 0.985 g / cm 3 at 20°C, viscosity of 800 to 35,000 mm 2 / s at 50°C, density of 0.93 to 0.99 g / cm 3 at 20°C.

12. The process for producing a low carbon bunker fuel oil according to claim 10 or 11, characterized in that, Comprising the following contents: (a) a certain amount of stabilizer is added to methanol, and emulsified and homogenized by an emulsifying machine to obtain mixed solution M; (b) mixed solution M is slowly added to light component oil under stirring, and the stirring is continued for 30-90 min to obtain fully emulsified mixed oil N; (c) mixed oil N is added to residual oil at a certain temperature and rate, and stirred for more than 30 min to obtain blended low-carbon marine fuel oil product.

13. The method of claim 12, wherein, The temperature in step (c) is 50℃-80℃.

14. The method of claim 12, wherein, The addition rate of mixed oil N in step (c) is 25-100 ml / min added to each liter of mixture.