JP6917345B2 - Fuel oil composition for internal combustion engine and its manufacturing method - Google Patents

Description

The present invention relates to a fuel oil composition for an internal combustion engine and a method for producing the same.

JIS K2205: 2006 type 1 heavy oil (hereinafter, also referred to as "A heavy oil"), in particular, JIS K2205: 2006 type 1 heavy oil (hereinafter, also referred to as "low sulfur A heavy oil") is kerosene, light oil, etc. Compared to this, the calorific value per unit volume is high, the amount of fuel oil used (volume) can be reduced, and compared to C heavy oil (JIS K2205: 2006 type 3 heavy oil), sulfur content, nitrogen content, and residual carbon content It is widely used as a fuel oil for internal combustion engines such as marine diesel engines and as a fuel oil for external fuel oils such as boilers.

As the fuel oil for ships, a fuel oil satisfying ISO8217 "Petroleum products-Fuels (class F) -Specialization of marine fuels" is known. Since this fuel oil for ships may cause clogging of the fuel oil filter, as a method for reducing the clogging frequency of the filter, the latent sediment (ISO 10307-2) is 0.10% by mass or less. A method of setting the total sediment by hot fuel (ISO 10307-1) to 0.10% by mass or less is known.
Further, for A heavy oil and low sulfur A heavy oil, as a method for improving the oil permeability of the fuel oil filter, for example, the methods described in Patent Documents 1 to 4 are also known.

Japanese Unexamined Patent Publication No. 10-298566 Japanese Unexamined Patent Publication No. 2004-091676 Japanese Unexamined Patent Publication No. 2001-049269 JP-A-2007-262210

However, even if the fuel oil composition for an internal combustion engine having improved oil permeability is used, the frequency of closing the fuel oil filter increases during normal use, especially when the fuel oil composition for an internal combustion engine is used for a diesel engine of a ship or the like. Problems tend to occur, and the frequency of blockage tends to increase when used after long-term storage in a fuel oil tank or the like in a ship. Therefore, the fuel oil composition for internal combustion engines has oil permeability during normal use (hereinafter, also referred to as "normal temperature oil permeability") and storage stability performance that maintains room temperature oil permeability even after long-term storage. Has come to be required.

By the way, especially in the use of diesel engines for ships and the like, the usage environment of the fuel oil composition for internal combustion engines changes remarkably. Therefore, the fuel oil composition for internal combustion engines is required to respond to the change in the environment. Above all, it is important to have low-temperature oil flow performance that can be used in cold regions without generating wax or the like without heating. In addition, the fuel oil composition for internal combustion engines has combustion performance that is originally required as a fuel oil composition without ignition delay, and the sulfur oxide concentration in the exhaust gas is increasing due to the recent increase in attention to environmental problems. Environmental performance that can reduce the environmental load by reducing the amount of fuel is also required.
However, the conventional A heavy oil and C heavy oil, and the above-mentioned fuel oil composition for internal combustion engines having improved oil permeability, sufficiently satisfy all of the normal temperature oil permeability, the storage stability performance, the low temperature oil permeability, the combustion performance and the environmental performance. It cannot be said that it is satisfactory, and it is desired to develop a fuel oil composition for an internal combustion engine that can simultaneously satisfy these performances.

As a result of diligent studies in view of the above problems, the present inventor has found that the following invention can solve the problem. That is, the present invention provides a fuel oil composition for an internal combustion engine having the following configuration and a method for producing the same.

[1] _{A paraffinic hydrocarbon satisfying all of the following (a 1} ) to (d ₁ ) is contained in a content of 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and the following (a ₂₎ ) And (b ₂ ) are contained in a content of 0.2% by volume or more based on the total amount of the composition, and the fuel oil composition for an internal combustion engine satisfying all of the following (1) to (7). thing.
(A ₁ ) Saturation content is 99.0% by volume or more (b ₁ ) Sulfur content is 0.01% by mass or less (c ₁ ) Cloud point is -50.0 ° C or less (d ₁ ) At 50 ° C kinematic viscosity of 5.00 mm ² / s or more 20.00 mm ² / s or less _{(a 2)} the slope of the filtration time is 0.30 or less _(b 2) carbon residue of 10% residual oil is 10.0 wt% or more ( 1) Sulfur content is 0.50% by mass or less (2) Clouding point is -6.0 ° C or less (3) Dynamic viscosity at 50 ° C is 1.80 mm ² / s or more and 3.60 mm ² / s or less (4) ) Density at 15 ° C is 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less (5) Residual carbon content of 10% residual oil is more than 0.20% by mass and 0.60% by mass or less (6) Cetan index 43.0 or more and 50.0 or less (7) Dry sludge amount of 3.0 mg / 100 mL or less [2] Paraffinic hydrocarbons satisfying all of the _{following (a 1} ) to (d _1).
A residual carbon source that satisfies both (a ₂ ) and (b _{2) below,}
The content of the paraffinic hydrocarbon should be 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and the content of the residual carbon source should be 0.2% by volume or more based on the total amount of the composition. A method for producing a fuel oil composition for an internal combustion engine, which satisfies all of the following (1) to (7).
(A ₁ ) Saturation content is 99.0% by mass or more (b ₁ ) Sulfur content is 0.01% by mass or less (c ₁ ) Clouding point is -50.0 ° C or less (d ₁ ) At 50 ° C kinematic viscosity of 5.00 mm ² / s or more 20.00 mm ² / s or less _{(a 2)} the slope of the filtration time is 0.30 or less _(b 2) carbon residue of 10% residual oil is 10.0 wt% or more ( 1) Sulfur content is 0.50% by mass or less (2) Clouding point is -6.0 ° C or less (3) Dynamic viscosity at 50 ° C is 1.80 mm ² / s or more and 3.60 mm ² / s or less (4) ) Density at 15 ° C is 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less (5) Residual carbon content of 10% residual oil is more than 0.20% by mass and 0.60% by mass or less (6) Cetan index 43.0 or more and 50.0 or less (7) Dry sludge amount is 3.0 mg / 100 mL or less

According to the present invention, it is possible to provide a fuel oil composition for an internal combustion engine having excellent oil flow performance, combustion performance and environmental performance, which has both normal temperature oil flow performance, storage stability performance and low temperature oil flow performance, and a method for producing the same. ..

[Fuel oil composition for internal combustion engine]
Hereinafter, a fuel oil composition for an internal combustion engine according to an embodiment of the present invention (hereinafter, may be simply referred to as “the present embodiment”) and a method for producing the same will be described in more detail.
The fuel oil composition for an internal combustion engine of the present embodiment has (a ₁ ) a saturation content of 99.0% by mass or more, (b ₁ ) a sulfur content of 0.01% by mass or less, and (c ₁ ) a clouding point. There -50.0 ° C. or less, and _(d 1) 1 to paraffinic hydrocarbons kinematic viscosity at 50 ° C. satisfies any of the following 5.00 mm ² / s or more 20.00 mm ² / s of the total amount of the composition. It is contained in a content of 0% by mass or more and 9.5% by mass or less, (a ₂ ) the viscosity of the filtration time is 0.30 or less, and (b ₂ ) the residual carbon content of the 10% residual oil is 10.0% by mass or more. Contains a residual carbon source that satisfies all of the above in an amount of 0.2% by mass or more based on the total amount of the composition, (1) a sulfur content of 0.50% by mass or less, and (2) a clouding point of -6.0 ° C or less. , (3) Dynamic viscosity at 50 ° C is 1.80 mm ² / s or more and 3.60 mm ² / s or less, (4) Density at 15 ° C is 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less, (5) ) Residual carbon content of 10% residual oil is more than 0.20% by mass and 0.60% by mass or less, (6) Setan index is 43.0 or more and 50.0 or less, and (7) Dry sludge amount is 3.0 mg / It is a fuel oil composition that satisfies all of 100 mL or less.

(Paraffin hydrocarbon)
The fuel oil composition for an internal combustion engine of the present embodiment contains _{a specific paraffinic hydrocarbon satisfying all of the following (a 1} ) to (d ₁ ) in an amount of 1.0% by volume or more and 9.5% by volume based on the total amount of the composition. It is necessary to include it in a content of% or less. If the content of the paraffin-based hydrocarbon is less than 1.0% by volume, it becomes difficult to obtain low-temperature oil permeability, and heating is required when used in a cold region. On the other hand, if the content of the paraffinic hydrocarbon exceeds 9.5% by volume, it becomes difficult to obtain excellent normal temperature oil flow performance and storage stability performance. Paraffin from the viewpoint of improving the performance that combines normal temperature oil flow performance, storage stability performance, and low temperature oil flow performance (hereinafter, these may be collectively referred to as "oil flow performance"), combustion performance, and environmental performance. The content of the system hydrocarbon based on the total amount of the composition is preferably 1.5% by volume or more, more preferably 2.0% by volume or more, still more preferably 3.0% by volume or more, still more preferably 3.5% by volume. % Or more, and the upper limit is preferably 9.0% by volume or less, more preferably 8.5% by volume or less, still more preferably 8.0% by volume or less, still more preferably 7.5% by volume or less.

Hereinafter, the performance of the paraffinic hydrocarbon used in the present embodiment will be described.
(A ₁ ) Saturation content The saturation content of paraffinic hydrocarbons must be 99.0% by volume or more. If the saturated content of the paraffinic hydrocarbon is less than 99.0% by volume, it is difficult to obtain low-temperature oil flow performance, and heating is required when the paraffin-based hydrocarbon is used in a cold region. From the viewpoint of improving the oil flow performance and the combustion performance and the environmental performance, it is preferably 99.4% by volume or more, more preferably 99.9% by volume or more, and further preferably 100.0% by volume. In the present specification, the saturation content is a value measured by a petroleum product-hydrocarbon type test method-high performance liquid chromatography method defined in JPI-5S-49-2007. be.

(B ₁ ) Sulfur content The sulfur content of paraffinic hydrocarbons must be 0.01% by mass or less. If the sulfur content is greater than 0.01% by mass, it becomes difficult to reduce the environmental load caused by sulfur oxides in the exhaust gas, so excellent environmental performance cannot be obtained, and flue corrosion occurs due to a decrease in the acid dew point of the exhaust gas. It becomes easy and stable operation of the engine becomes difficult. From the viewpoint of excellent environmental performance and stable engine operation, and considering the ease of adjusting the sulfur content of the fuel oil composition for internal combustion engines to 0.50% by mass or less, the sulfur content is preferable. It is 0.005% by mass or less, more preferably 0.001% by mass or less.
In the present specification, the sulfur content is measured by selecting a measuring method according to the content, and when the content is 0.01 to 5% by mass, JIS K 2541-4: 2003 (crude oil and petroleum). Product-Sulfur content test method-Part 4: Radiation excitation method), and when the content is 5 to 500 mass ppm (0.0005 to 0.05 mass%), JIS K2541 -7: Values measured according to 2003 (crude oil and petroleum products-sulfur content test method-Part 7: wavelength dispersion fluorescent X-ray method).

(C ₁ ) Fogging point The haze point of paraffinic hydrocarbons must be -50.0 ° C or lower. When the fogging point is higher than −50.0 ° C., it becomes difficult to set the fogging point of the fuel oil composition for an internal combustion engine to −6.0 ° C. or lower, and it becomes difficult to obtain excellent oil flow performance.
In the present specification, the haze point is a value measured according to JIS K2269: 1987 (pour point of crude oil and petroleum products and haze point test method).

Kinematic viscosity at 50 ° C. kinematic viscosity paraffinic hydrocarbons in the _(d 1) 50 ℃ is required to be 5.00 mm ² / s or more 20.00mm at ² / s or less. And a kinematic viscosity of greater than 20.00 mm ² / s at 50 ° C., it becomes difficult to limit the kinematic viscosity at 50 ° C. for an internal combustion engine fuel oil composition below 3.60 mm ² / s, also has excellent low-temperature oil passage performance It becomes difficult to obtain. Further, if the kinematic viscosity at 50 ° C. is ^{less than 5.00 mm 2} / s, it becomes difficult to use the existing equipment (pump, flow meter) as it is, and the kinematic viscosity of the fuel oil composition for internal combustion engine at 50 ° C. It becomes difficult to set the lower limit to 1.80 mm ² / s or more. From the viewpoint of facilitating the kinematic viscosity of the fuel oil composition for an internal combustion machine at 50 ° C., improving the low-temperature oil passage performance, and obtaining appropriate lubricity, the kinematic viscosity of the paraffinic hydrocarbon at 50 ° C. is determined. It is preferably 6.00 mm ² / s or more, more preferably 7.00 mm ² / s or more, and the upper limit is preferably 18.00 mm ² / s or less, more preferably 15.00 mm ² / s or less.
In the present specification, the kinematic viscosity at 50 ° C. is a value measured according to JIS K 2283: 2000 (a kinematic viscosity test method for crude oil and petroleum products).

The paraffin-based hydrocarbon used in the present embodiment _{is not particularly limited as long as it has the above-mentioned properties and compositions (a 1} ) to (d ₁ ), and may be either a normal paraffin-based hydrocarbon or an iso-paraffin-based hydrocarbon. It may be present, or it may be a mixture of these. Isoparaffin-based hydrocarbons are preferable as the paraffin-based hydrocarbons in consideration of improving oil flow performance, environmental performance and combustion performance.

Further, the paraffinic hydrocarbon used in the present embodiment has the following properties and compositions (e ₁ ) to (k ₁ ) _{in addition to the above properties and compositions (a 1} ) to (d _1). be able to.
(E ₁ ) Flash point The flash point of the paraffinic hydrocarbon is preferably 100.0 ° C. or higher. When the flash point is 100.0 ° C. or higher, the handling safety is improved and the stable operation of the engine becomes easier. From the viewpoint of handling safety and stable engine operation, the flash point of the paraffinic hydrocarbon is preferably 120.0 ° C., more preferably 140.0 ° C. or higher.
In the present specification, the flash point is a value measured according to JIS K 2265-3: 2007 (crude oil and petroleum products-flash point test method-Part 3: Penschee Quartense sealing method).

(F ₁ ) Pour point The pour point of the paraffinic hydrocarbon is preferably −50.0 ° C. or lower. When the pour point is within the above range, better low-temperature flow performance can be obtained, and heating is not required even when used in cold regions.
In the present specification, the pour point is a value measured according to JIS K 2269: 1987 (pour point of crude oil and petroleum products and cloud point test method of petroleum products).

(G ₁ ) Distillation properties As for the distillation properties of paraffinic hydrocarbons, a 10% volume distilling temperature is preferably 270 ° C. or higher, more preferably 285 ° C. or higher, and a 50% volumetric distillation temperature is preferably 290 ° C. or higher. , More preferably 300 ° C. or higher, and 90% volume distillation temperature is preferably 380 ° C. or lower, more preferably 365 ° C. or lower. When the 10% capacitance distilling temperature, the 50% capacitance distilling temperature and the 90% capacitance distilling temperature are within the above ranges, the combustion performance is improved, the handling safety is improved, and the stable operation of the engine is easy. It becomes.
In the present specification, the initial distillation point and the end point of the distillation properties are values measured according to JIS K2254: 1998 (Petroleum products-distillation test method-).

(H ₁ ) Density at 15 ° C. The density of paraffin-based hydrocarbons at 15 ° C. is preferably 0.9000 g / cm ³ or less, more preferably 0.8800 g / cm ³ or less, ^{still more preferably 0.8500 g / cm 3} or less. The lower limit is not particularly limited, but is usually 0.7900 g / cm ³ or more, preferably 0.8000 g / cm ³ or more. When the density at 15 ° C. is within the above range, the density of the fuel oil composition for internal combustion engine of the present embodiment at 15 ° C. is easily set to 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less, and the combustion performance is improved. Can be made to.
In the present specification, the density at 15 ° C. is a value measured according to JIS K 2249-1: 2011 (crude oil and petroleum products-how to obtain density-Part 1: vibration method).

(I ₁ ) Total calorific value The total calorific value of paraffinic hydrocarbons is preferably 37,000 (J / mL) or more, more preferably 37,200 (J / mL) or more, still more preferably 37,500 (J). / ML) or more. When the total calorific value is within the above range, the total calorific value of the fuel oil composition can be improved, so that the amount of the fuel oil composition used can be further reduced.
In the present specification, the total calorific value is measured and estimated according to JIS K2279: 2003 (crude oil and petroleum products-calorific value test method and calculation method-) ("6. Total calorific value estimation method, 6. 3 e) It is a value estimated by the calculation formula in the case of heavy oil A specified in 1) ”.

(J ₁ ) Residual carbon content of 10% residual oil The residual carbon content of 10% residual oil of paraffinic hydrocarbon is preferably 1.0% by mass or less, more preferably 0.5% by mass or less, and further preferably 0. .1 mass% or less. When the residual carbon content of the 10% residual oil is within the above range, the residual carbon content of the 10% residual oil of the fuel oil composition for internal combustion engines tends to be more than 0.20% by mass and 0.60% by mass or less, and the temperature is low. It becomes easier to maintain oil flow performance and combustion performance, and the effect of reducing soot generation due to poor combustion is improved, so that stable operation of the engine becomes easier.
In the specification, the residual carbon content of the 10% residual oil conforms to JIS K 2270-1: 2009 (crude oil and petroleum products-how to determine the residual carbon content-Part 1: Conradson method) and Annex A. It is a value measured using the 10% residual oil prepared in the above.

(K ₁ ) Cetane index The cetane number of a paraffinic hydrocarbon is preferably 50.0 or more, more preferably 60.0 or more, still more preferably 70.0 or more, and the upper limit is preferably 85.0 or less. It is preferably 80.0 or less, more preferably 75.0 or less. When the cetane number is within the above range, the cetane number of the fuel oil composition for an internal combustion engine is likely to be 43.0 or more and 50.0 or less, and the combustion performance is improved. From the same viewpoint as this, the cetane number is preferably 15.0 or more, more preferably 20.0 or more, still more preferably 25.0 or more, and the upper limit is preferably 45.0 or less, more preferably. It is 40.0 or less, more preferably 35.0 or less.
In the present specification, the cetane index is defined as the fuel oil standard Z. G. It is a value measured and calculated based on the all-fishermen's cetane index calculation method specified in ST-1020. The cetane number is a value obtained according to JIS K 2280-4: 2013 (Petroleum products-Octane number, cetane number and cetane index calculation-Part 4: Cetane number).

(Residual carbon source)
The fuel oil composition for an internal combustion engine of the present embodiment contains _{a specific residual carbon source satisfying both the following (a 2} ) and (b ₂ ) in a content of 0.2% by volume or more based on the total amount of the composition. It takes that. If the content of the residual carbon source is less than 0.2% by volume, excellent low-temperature oil flow performance and storage stability performance cannot be obtained. From the viewpoint of improving oil flow performance while obtaining excellent combustion performance and environmental performance, the content of the residual carbon source based on the total amount of the composition is preferably 0.5% by volume or more, more preferably 1.0% by volume. As described above, it is more preferably 1.5% by volume or more, and the upper limit is preferably 5.0% by volume or less, more preferably 4.0% by volume or less, still more preferably 3.0% by volume or less.

As the residual carbon source, for example, the following heavy oil fractions such as heavy fuel oil C, atmospheric distillation residual oil, vacuum distillation residual oil, direct fuel oil and cracked heavy oil, and extracts are preferably mentioned. By using these fractions, the properties and compositions of the fuel oil compositions for internal combustion engines (1) to (7), and further (8) and (9) below can be easily obtained, and the oil flow performance and combustion performance can be easily obtained. And the environmental performance can be improved. Considering the oil flow performance and the combustion performance, direct fuel oil and extract are preferable, and extract is more preferable. As the residual carbon source, the following fractions can be used alone or in combination of two or more.
-C heavy oil / atmospheric distillation residual oil (residual oil obtained by atmospheric distillation of crude oil with an atmospheric distillation apparatus)
-Vacuum distillation residual oil (residual oil obtained by vacuum distillation of atmospheric distillation residual oil with a vacuum distillation apparatus)
Direct de-heavy oil (heavy oil obtained by directly desulfurizing atmospheric distillation residual oil and / or vacuum distillation residual oil with a desulfurization apparatus)
・ Decomposed heavy oil (heavy oil obtained by cracking direct decompression of heavy oil)
-Extract (medium and heavy vacuum distillation distillate obtained by vacuum distillation of atmospheric distillation residual oil, dehiscence oil (bright stock oil) of vacuum distillation residual oil) is distilled and separated with furfural or the like. Obtained high aromatic extract oil)

(Characteristics and composition of residual carbon source)
The heavy oil fraction of the residual carbon source used in the present embodiment, the properties and composition of the extract include the following (a ₂ ) slope of filtration time and (b ₂ ) residual carbon content of 10% residual oil. It is necessary to have properties and composition. In the present embodiment, even if the types are classified into the heavy oil fractions and extracts exemplified above, those having no properties and compositions of _{(a 2} ) and (b _{2) are classified into the present embodiment.} It does not correspond to the residual carbon source used in the form.

(A ₂ ) The slope of the filtration time of the residual carbon source is 0.30 or less. If it is larger than 0.30, excellent normal temperature oil flow performance and storage stability performance cannot be obtained. Excellent room temperature oil flow performance and storage stability performance cannot be obtained. From the viewpoint of improving oil flow performance while obtaining excellent combustion performance and environmental performance, it is preferably 0.25 or less, and particularly preferably 0.20 or less, more preferably 0.20 or less when the residual carbon source is an extract. It is 0.10 or less, more preferably 0.04 or less. A method for measuring the slope of the filtration time will be described in Examples.
(B ₂ ) The residual carbon content of the 10% residual oil of the residual carbon source is 10.0% by mass or more. If it is less than 10.0% by mass, the low temperature oil flow performance is deteriorated. The residual carbon content of the 10% residual oil of the fuel oil composition for internal combustion engines can be easily set to more than 0.20% by mass and 0.60% by mass or less, which makes it easy to maintain low-temperature oil flow performance and combustion performance, and also generates soot due to poor combustion. The residual carbon content of the 10% residual oil is preferably 13.0% by mass or more, preferably 35.0% by mass as the upper limit, from the viewpoint of facilitating stable operation of the engine because the reduction effect of the engine is improved. Hereinafter, it is more preferably 25.0% by mass or less, still more preferably 15.0% by mass or less.

Further, as the properties and composition of the residual carbon source used in the present embodiment, in addition to the above-mentioned properties, the following _{properties and compositions (c 2} ) to (i ₂ ) are preferably mentioned.
(C ₂ ) The asphaltene content of the residual carbon source is 3.0% by mass or less. If it is larger than 3.0% by mass, it becomes difficult to obtain excellent oil flow performance. From the viewpoint of improving combustion performance and environmental performance as well as oil flow performance, it is preferably 1.5% by mass or less, and particularly preferably 1.0% by mass or less when the residual carbon source is an extract. It is 0.1% by mass or less. In the present specification, the asphaltene content is a value measured by the TLC / FID method specified in IP-469 (International Standard Test Method).
(D ₂ ) The aromatic content of the residual carbon source is preferably 35.0% by mass or more, more preferably 45.0% by mass or more, still more preferably 50.0% by mass or more, and the residual carbon source is In the case of an extract, it is particularly preferably 65.0% by mass or more, more preferably 70.0% by mass or more. When the aromatic content is within the above range, clogging of the fuel oil filter due to sludge generation is further suppressed, so that better oil flow performance can be obtained. In the present specification, the aromatic content of the residual carbon source is defined by IP-469 (International Standard Test Method (IP Test Methods)), and the aromatic content of one ring measured by the TLC / FID method. It is the total amount of two rings of aromatics and three or more rings of aromatics.
(E ₂ ) The sulfur content of the residual carbon source is preferably 1.20% by mass or less, more preferably 0.60% by mass, and further preferably 0.50% by mass or less. The sulfur content is preferably as small as possible in consideration of environmental performance, and when it is within the above range, the sulfur content of the fuel oil composition for an internal combustion engine of the present embodiment is likely to be 0.50% by mass or less. Better environmental performance can be obtained and more stable operation of the engine becomes possible.

(F ₂ ) The kinematic viscosity of the residual carbon source at 50 ° C. is preferably 5.00 mm ² / s or more, more preferably 10.00 mm ² / s or more, and the upper limit is preferably 150.00 mm ² / s or less. More preferably, it is 100.00 mm ² / s or less. Especially when the residual carbon source is an extract, it is preferably 40.00 mm ² / s or less, more preferably 25.00 mm ² / s or less. When the kinematic viscosity at 50 ° C. is within the above range, the kinematic viscosity of the fuel oil composition for internal combustion engine at 50 ° C. is likely to be 1.80 mm ² / s or more and 3.60 mm ² / s or less, and the low temperature oil flow performance is improved. , And appropriate lubricity can be obtained.
(G ₂ ) The flash point of the residual carbon source is preferably 60.0 ° C. or higher, more preferably 70.0 ° C. or higher. When the flash point is within the above range, the handling safety is improved and the engine can be operated more stably.
(H ₂ ) The pour point of the residual carbon source is preferably 35.0 ° C. or lower, more preferably 30.0 ° C. or lower, and particularly preferably 0.0 ° C. or lower when the residual carbon source is an extract. More preferably, it is −5.0 ° C. or lower. When the pour point is within the above range, better low-temperature flow performance can be obtained, and heating is not required even when used in cold regions.
Density at 15 ℃ of _{(i 2)} the residual carbon source, preferably 0.8800g / cm ³ or more, more preferably 0.9000g / cm ³ or more, also preferably 0.9830g / cm ³ or less as the upper limit. When the density at 15 ° C. is within the above range, the density of the fuel oil composition for internal combustion engine at 15 ° C. is likely to be 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less, and the combustion performance can be improved.

(Characteristics of fuel oil composition for internal combustion engine)
The fuel oil composition for an internal combustion engine of the present embodiment contains the above paraffinic hydrocarbon in a content of 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and contains the above residual carbon source. It contains 0.20% by volume or more based on the total amount, and has the following properties and compositions (1) to (7). Hereinafter, the properties and compositions of (1) to (7) contained in the fuel oil composition for an internal combustion engine of the present embodiment will be described.

(1) Sulfur content The sulfur content of the fuel oil composition for internal combustion engines is required to be 0.50% by mass or less based on the total amount of the composition. If the sulfur content is greater than 0.50% by mass, the environmental load due to sulfur oxides in the exhaust gas cannot be reduced, so that excellent environmental performance cannot be obtained, and flue corrosion is likely to occur due to a decrease in the acid dew point of the exhaust gas. , It becomes difficult to operate the engine stably. From the viewpoint of excellent environmental performance and stable engine operation, the sulfur content is preferably 0.45% by mass or less, more preferably 0.40% by mass or less, and further preferably 0.30% by mass or less.

(2) Fogging point The fogging point of the fuel oil composition for an internal combustion engine must be −6.0 ° C. or lower. If the cloudiness point is higher than −6.0 ° C., it becomes difficult to obtain excellent oil flow performance. From the viewpoint of improving the oil flow performance, it is preferably −7.0 ° C. or lower, more preferably −8.0 ° C. or lower, and further preferably −9.0 ° C. or lower.

(3) Dynamic Viscosity at 50 ° C. The kinematic viscosity of the fuel oil composition for an internal combustion engine at 50 ° C. ^{is required to be 1.80 mm 2} / s or more and 3.60 mm ² / s or less. If the kinematic viscosity at 50 ° C. is ^{larger than 3.60 mm 2} / s, excellent combustion performance cannot be obtained ^{, and if it is less than 1.80 mm 2} / s, existing equipment (pump, flow meter), etc. can be used as it is. It becomes difficult to do. Improves combustion performance and in view of obtaining appropriate lubricity, kinematic viscosity at 50 ° C. for an internal combustion engine fuel oil composition, preferably from 2.00 mm ² / s or more, more preferably 2.25 mm ² / s or more , still more preferably 2.50 mm ² / s or more, upper limit is preferably 3.50 mm ² / s or less, more preferably 3.25 mm ² / s, more preferably not more than 3.00 mm ² / s.

(4) Density at 15 ° C. The density of the fuel oil composition for an internal combustion engine at 15 ° C. is required to be ^{0.8610 g / cm 3} or more and 0.8800 g / cm ^{3 or less.} If the density at 15 ° C. is ^{less than 0.8610 g / cm 3} , the calorific value is likely to decrease, and if it is ^{larger than 0.8800 g / cm 3} , the combustion performance is deteriorated. From the viewpoint of improving combustion performance, improving total calorific value, and further reducing the amount used, the density of the fuel oil composition for an internal combustion engine at 15 ° C. is preferably 0.8640 g / cm ³ or more, more preferably 0. .8680 g / cm ³ or more, more preferably 0.8715 g / cm ³ or more, and the upper limit is preferably 0.8780 g / cm ³ or less, more preferably 0.8760 g / cm ³ or less, still more preferably 0.8740 g / cm. It is cm ³ or less.

(5) Residual carbon content of 10% residual oil The residual carbon content of 10% residual oil of the fuel oil composition for internal combustion engines is required to be more than 0.20% by mass and 0.60% by mass or less. If the residual carbon content of the 10% residual oil is not less than 0.60% by mass, the combustion performance is deteriorated. Further, by setting the lower limit value to more than 0.20% by mass, there is a merit in tax law. Residual carbon of 10% residual oil of fuel oil composition for internal combustion engine from the viewpoint of facilitating maintenance of combustion performance and facilitating stable engine operation by improving the effect of reducing soot generation due to poor combustion. The amount is preferably 0.45% by mass or less, more preferably 0.35% by mass or less.

(6) Cetane number The cetane number of the fuel oil composition for an internal combustion engine is required to be 43.0 or more and 50.0 or less. If the cetane number is less than 43.0, ignition delay or the like is likely to occur and the combustion performance is deteriorated. Decreases. From the viewpoint of improving oil flow performance and combustion performance, the cetane index of the fuel oil composition for an internal combustion engine is preferably 43.5 or more, more preferably 44.0 or more, and the upper limit is preferably 48.0 or less. It is preferably 46.5 or less, more preferably 45.5 or less, and even more preferably 45.0 or less.

(7) Amount of dry sludge The amount of dry sludge of the fuel oil composition for an internal combustion engine must be 3.0 mg / 100 mL or less. If the amount of dry sludge is larger than 3.0 mg / 100 mL, the normal temperature oil flow performance is particularly deteriorated, and excellent oil flow performance cannot be obtained. From the viewpoint of improving the oil flow performance, the amount of dry sludge of the fuel oil composition for an internal combustion engine is preferably 2.0 mg / 100 mL or less, more preferably 1.0 mg / 100 mL or less.
In the present specification, the amount of dry sludge is defined as the fuel oil standard Z. G. It is a value measured based on the All Fisheries Federation A heavy oil dry sludge measurement method specified in ST-1010.

Further, the fuel oil composition for an internal combustion engine of the present embodiment may have the following properties (8) and (9) in addition to the above properties (1) to (7).
(8) Flash point The flash point of the fuel oil composition for an internal combustion engine is preferably 60.0 ° C. or higher, more preferably 70.0 ° C. or higher, still more preferably 75.0 ° C. or higher. The higher the flash point as in the above range, the better the handling safety.

(9) Pour point The pour point of the fuel oil composition for an internal combustion engine is preferably −5.0 ° C. or lower, more preferably -10.0 ° C. or lower, still more preferably -12.5 ° C. or lower. When the pour point is within the above range, better low-temperature flow performance can be obtained, and heating is not required even when used in cold regions.

(Base material)
The fuel oil composition for an internal combustion engine of the present embodiment may contain, for example, the following gas oil fractions as a base material in addition to the above paraffinic hydrocarbon and residual carbon source.

(Light oil fraction)
As the gas oil fraction, for example, the following gas oil fractions, vacuum gas oil fractions, desulfurized gas oil fractions, cracked gas oil fractions, desulfurized gas oil fractions and direct gas oil fractions are preferably mentioned. By using these fractions, the properties and compositions of (1) to (7), and further (8) and (9) above can be easily obtained, and oil flow performance, combustion performance and environmental performance can be improved. Can be done. Considering the oil flow performance (particularly the normal temperature oil flow performance and the low temperature oil flow performance), the direct distillate gas oil distillate, the cracked gas oil distillate, the desulfurization gas oil distillate, and the direct gas oil distillate are more preferable. The desulfurization cracked gas oil fraction and the direct gas fuel distillate are more preferable, and the cracked gas oil fraction and the desulfurization gas oil fraction are even more preferable. As the light oil fraction, the following fractions can be used alone or in combination of two or more.
・ Direct distillate gas oil fraction (light oil distillate obtained by atmospheric distillation of crude oil with an atmospheric distillation unit)
・ Reduced gas oil fraction (light oil fraction obtained by vacuum distillation of atmospheric distillation residual oil with a vacuum distillation apparatus)
・ Desulfurized gas oil fraction (direct gas oil fraction and / or gas oil distillate obtained by desulfurizing vacuum gas oil distillate ・ Decomposed gas oil fraction (normal pressure distillation residual oil and / or vacuum distillation residual oil is fluidized and catalytically decomposed) Light oil fraction obtained from
・ Desulfurization cracked gas oil fraction (light oil fraction obtained by desulfurizing the cracked gas oil fraction)
Direct desulfurization gas oil fraction (light oil fraction obtained by directly desulfurizing atmospheric distillation residual oil and / or vacuum distillation residual oil with a desulfurization apparatus)

(Characteristics of light oil fraction)
As the properties of the gas oil fraction, it is preferable that the light oil fraction has the following properties and composition of density at 15 ° C., kinematic viscosity at 50 ° C., sulfur content, and aromatic content.
Density at 15 ℃ of gas oil fraction, preferably 0.8200g / cm ³ or more, more preferably 0.8300g / cm ³ or more, more preferably 0.8350g / cm ³ or more and the upper limit is 0.9400G / It ^{is preferably cm 3} or less. Further, particularly, the cracked gas oil fraction and the desulfurized gas oil fraction are preferably 0.900 g / cm ³ or more, more preferably 0.9100 g / cm ³ or more, and further preferably 0.9300 g / cm ³ or more. When the density at 15 ° C. is within the above range, the density of the fuel oil composition for internal combustion engine at 15 ° C. is likely to be 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less, and the combustion performance can be improved.

Kinematic viscosity at 50 ° C. of the gas oil fraction is preferably not more than 3.40 mm ² / s, more preferably not more than 3.20 mm ² / s, more preferably less 3.10mm ² / s, 1.80mm ² is a lower limit / S or more is preferable. When the kinematic viscosity at 50 ° C. is within the above range, the kinematic viscosity of the fuel oil composition for internal combustion engine at 50 ° C. is likely to be 1.80 mm ² / s or more and 3.60 mm ² / s or less, and the low-temperature oil permeability is improved. And moderate lubricity can be obtained.

The sulfur content of the gas oil fraction is preferably as small as possible in consideration of environmental performance, and is usually 1.50% by mass or less. For light oil fractions other than the above gas oil fraction, it is preferably 0. .50% by mass or less, more preferably 0.40% by mass or less, still more preferably 0.30% by mass or less. When the sulfur content is within the above range, the sulfur content of the fuel oil composition for an internal combustion engine is likely to be 0.50% by mass or less, better environmental performance can be obtained, and more stable operation of the engine can be performed. It will be possible.

The aromatic content of the light oil fraction is preferably 15.0% by volume or more, more preferably 20.0% by volume or more, still more preferably 30.0% by volume or more. Further, particularly, the cracked gas oil fraction and the desulfurized gas fuel fraction are preferably 60.0% by volume or more, more preferably 65.0% by volume or more. When the aromatic content is within the above range, clogging of the fuel oil filter due to sludge generation is further suppressed, so that better oil flow performance can be obtained. In the present specification, the aromatic content of the light oil fraction is determined by the petroleum product-hydrocarbon type test method-high performance liquid chromatography method specified in JPI-5S-49-2007. It is the total amount of 1 ring aromatic, 2 ring aromatic and 3 or more ring aromatics to be measured.

In addition to the above-mentioned properties, the properties of the gas oil fraction used in the present embodiment include the following properties such as cloudiness point, flash point, pour point, distillation property, total calorific value, cetane index and cetane number. And composition are preferred.
The cloudiness point is preferably 0.0 ° C. or lower, more preferably −1.0 ° C. or lower. When the fogging point is within the above range, the fogging point of the fuel oil composition for an internal combustion engine tends to be −6.0 ° C. or lower, and the oil flow performance is improved.
The flash point is preferably 50.0 ° C. or higher, more preferably 60.0 ° C. or higher, still more preferably 65.0 ° C. or higher. When the flash point is within the above range, the handling safety is improved.
The pour point is preferably 0.0 ° C. or lower, more preferably −5.0 ° C. or lower, still more preferably -12.5 ° C. or lower. When the pour point is within the above range, better low-temperature flow performance can be obtained, and heating is not required even when used in cold regions.

As for the distillation properties, the 10% volume distilling temperature is preferably 200 ° C. or higher, more preferably 210 ° C. or higher, and the 50% volumetric distillation temperature is preferably 250 ° C. or higher, more preferably 265 ° C. or higher, and also. The 90% volume distillation temperature is preferably 370 ° C. or lower, more preferably 360 ° C. or lower. When the 10% capacity distillation temperature, the 50% capacity distillation temperature and the 90% capacity distillation temperature are within the above ranges, the combustion performance is improved, the flash point is easily set within the above range, and the handling safety is improved. improves.
The total calorific value is preferably 37,000 (J / mL) or more, more preferably 37,000 (J / mL) or more, and further preferably 38,000 (J / mL) or more. When the total calorific value is within the above range, the total calorific value of the fuel oil composition for internal combustion engine can be improved, and the amount of fuel oil composition used for internal combustion engine can be further reduced.
The residual carbon content of the 10% residual oil is preferably 1.0% by mass or less, more preferably 0.5% by mass or less, and further preferably 0.3% by mass or less. When the residual carbon content of the 10% residual oil is within the above range, it becomes easy to maintain the combustion performance, and the effect of reducing soot generation due to poor combustion is improved, so that the stable operation of the engine becomes easier.
The cetane index is preferably 15.0 or more, more preferably 20.0 or more, and the upper limit is preferably 70.0 or less, more preferably 65.0 or less. When the cetane number is within the above range, the combustion performance is improved. From the same viewpoint as this, the cetane number is preferably 15.0 or more, more preferably 20.0 or more, and the upper limit is preferably 70.0 or less, more preferably 65.0 or less.

The fuel oil composition for an internal combustion engine of the present embodiment contains the paraffinic hydrocarbon and the residual carbon content so as to satisfy the properties and compositions of (1) to (7), and further (8) and (9). (Heavy oil fraction and extract) and, if desired, the above-mentioned light oil fraction can be contained in an arbitrary content for preparation. In this case, as the residual carbon source, at least one selected from the above-mentioned heavy oil fractions such as heavy fuel oil C, atmospheric distillation residual oil, reduced pressure distillation residual oil, direct fuel oil, cracked heavy oil and extracts and extracts can be used, and light oil. As the fraction, at least one selected from the above-mentioned direct fuel oil fraction, reduced pressure light oil fraction, desulfurized light oil fraction, cracked light oil fraction, desulfurized cracked light oil fraction and direct demineralized light oil fraction can be used. Further, in the present embodiment, the paraffinic hydrocarbon, the residual carbon content, and the light oil distillate can be used in combination according to the above (1) to (7), and further (8) and (9). It is preferable because it is easy to satisfy the properties and composition.

In the present embodiment, the content of the light oil fraction may be appropriately adjusted so that the obtained fuel oil composition for an internal combustion engine satisfies the properties and compositions of (1) to (7) above, and is not particularly limited. From the viewpoint of obtaining better oil flow performance, combustion performance and environmental performance, the upper limit is preferably 40.0% by volume or more, more preferably 60.0% by volume or more, still more preferably 80.0% by volume or more. It is preferably 99.0% by volume or less, more preferably 98.0% by volume or less, still more preferably 95.0% by volume or less.

(Other additives)
The fuel oil composition for an internal combustion engine of the present embodiment includes various additives such as a pour point lowering agent, a combustion accelerator, a cleaning agent, and a sludge dispersant, as necessary, within the range in which the above-mentioned properties and compositions can be maintained. Can be appropriately selected and blended.

[Manufacturing method of fuel oil composition for internal combustion engine]
The method for producing the fuel oil composition for an internal combustion engine of the present embodiment includes the paraffinic hydrocarbon, the residual carbon source, a direct gas gas distillate, a vacuum gas oil distillate, a desulfurized gas oil distillate, a decomposed gas oil distillate, and desulfurization. At least one gas oil fraction selected from the cracked gas oil fraction and the direct gas oil distillate, and the content of the paraffinic hydrocarbon is 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and the residue. This is a method for producing a fuel oil composition for an internal combustion engine, which satisfies all of the above (1) to (7) by mixing the carbon source content so as to be 0.2% by volume or more based on the total amount of the composition. The fuel oil composition for an internal combustion engine of the present embodiment can be produced, for example, by the above-mentioned method for producing a fuel oil composition for an internal combustion engine of the present embodiment.
In the production method of the present embodiment, the properties and compositions of (1) to (7) contained in the paraffinic hydrocarbon, each residual carbon source, each light oil fraction, and the fuel oil composition for internal combustion engine are the above-mentioned fuel oil for internal combustion engine. It is the same as that described for the composition. Further, in the production method of the present embodiment, for example, the above-mentioned (8) and (9) preferably possessed by the fuel oil composition for an internal combustion engine, preferable aspects such as the content of each component, and the like have also been described for the fuel oil composition for an internal combustion engine. It is the same as the one.

In the production method of the present embodiment, the contents of the paraffinic hydrocarbon, the residual carbon source, and the light oil fraction are the same as those described as the contents of these components in the fuel oil composition for an internal combustion engine. The content of the paraffin-based hydrocarbon based on the total amount of the composition is 1.0% by volume or more and 9.5% by volume or less, and the content of the residual carbon source based on the total amount of the composition is 0.2% by volume or more. When the light oil fraction is selected from the above examples and the content of these components is within the above range, the properties and composition of the fuel oil composition for an internal combustion engine are as described in (1) to (7) and further (1) to (7). The properties and composition of 8) and (9) can be easily obtained.

Next, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these examples.

(Measurement of the properties and composition of the base material)
The properties and composition of the paraffinic hydrocarbon, residual carbon source, and base material used in each Example and Comparative Example were measured by the following methods.
(A ₁ ), (c ₂ ) and (d ₂ ) Saturated content, etc .: Saturated content of paraffinic hydrocarbons and light oil distillates (olefin and aromatic (1 ring aromatic, 2 rings) (Aromatic content) content of 3 or more rings) is measured by the high performance liquid chromatography method specified in JPI-5S-49-2007, and the saturated content (aromatic content) of the residual carbon source. The content, resin content and asphaltene content) are determined by the TLC / FID method (thin film chromatograph-hydrocarbon flame ionization detection method) specified in IP-469 (International Standard Test Method (IP Test Methods)). It was measured.
(B ₁ ) and (e ₂ ) Sulfur content: Measured according to JIS K 2541-4: 2003 (Part 4) or JIS K2541-7: 2003 (Part 7).
(C ₁ ) Cloudy point: Measured according to JIS K2269: 1987.
(D ₁ ) and (f ₂ ) kinematic viscosity at 50 ° C.: Measured according to JIS K 2283: 2000.
(E ₁ ) and (g ₂ ) Flash point: Measured according to JIS K 2265-3: 2007 (Part 3).
(F ₁ ) and (h ₂ ) Pour point: Measured according to JIS K 2269: 1987.
(G ₁ ) Distillation properties: Measured according to JIS K2254: 1998.
(H ₁ ) and (i ₂ ) Density at 15 ° C.: Measured according to JIS K 2249-1: 2011 (Part 1).
(I ₁ ) Total calorific value: Paraffinic hydrocarbons and gas oil fractions are measured and estimated according to JIS K2279: 2003 (“6. Total calorific value estimation method, 6.3 e) 1)”. (Estimated by the calculation formula in the case of A heavy oil).
Residual carbon content of (j ₁ ) and (b ₂ ) 10% residual oil: Measured using 10% residual oil prepared in accordance with Annex A according to JIS K 2270-1: 2009 (Part 1). did.
(K ₁ ) Cetane index and cetane number: The cetane index is the fuel oil standard Z. G. It was measured and calculated based on the total fishing cetane index calculation method specified in ST-1020. The cetane number was measured and determined according to JIS K 2280-4: 2013 (Petroleum products-Octane number, cetane number and cetane index calculation-Part 4: Cetane number).

(A ₂ ) Measurement of slope of filtration time of residual carbon source "JIS K2601: 1998-Crude oil test method-14. Water content test method 14.2 Water content tester" (hereinafter, water content test) Each of the three scale test tubes used in the vessel) was sampled up to the marked line of 100 mL. Then, using the centrifuge used in the water content tester, centrifugation was performed for 55 minutes under the conditions of 55 ° C. and a relative centrifugal force of 600. Next, three 50 mL beakers were prepared, and the upper 50 mL of the sample of three centrifuged scale test tubes was separated into each 50 mL beaker. The beaker after sorting was weighed in units of 0.1 mg, and the weighed mass was defined as M ₁ (g). Then, the separated sample was heated for 15 minutes in a constant temperature bath kept at 85 ± 1 ° C.

A filter paper (Whatman No. 4 (55 mmφ)) having a pore size of 20 to 25 μm was placed in a filter device (hereinafter referred to as a filter device) specified in the actual sedimentation test method of JPI-5S-60-2000. The filter paper was pre-dried in a dryer at 110 ° C. for 20 minutes. Furthermore, the upper funnel was piled up and fixed so that the sample did not leak. At this time, packings having holes with a diameter of 28 mm were stacked to adjust the diameter of the filtration surface to 28 mm. After that, a vacuum pump capable of sucking at an exhaust speed of 12 L / min was attached to the other end of the decompression bottle. The upper funnel was also heated to 85 ± 1 ° C. like the sample.

Next, the first of the heated samples was poured into the center of the filter paper so that the sample did not stick to the inner wall of the funnel. One minute after starting to pour the filter paper, the vacuum pump was started and filtration was started. The time required from the start of filtration until the filter paper was completely exposed (only the filtration surface having an inner diameter of 28 mm was sufficient) was measured, and the time required for the measured filtration was defined as t (seconds). The used beaker was weighed, and the weighed mass was defined as M ₂ (g).

Next, after the vacuum pump was stopped, the operation of step D was repeatedly performed on the second and third samples. During this period, the measurement conditions did not change, such as removing the testing machine and cleaning the equipment. When the sample could not be filtered due to the blockage of the filter paper, the filtration work was completed and the process proceeded to the next step. Specifically, if the filtration is not completed within 6 minutes after the start of the filtration, the filtration work is completed. When the filter paper was blocked, the remaining sample was dissolved in toluene and removed with a pipette or the like. Then, after washing the funnel and the filter paper with n-heptane, the upper funnel was removed and the edge of the filter paper was confirmed. If the edges of the filter paper were colored, the sample was leaking, so a retest was performed.

From the following formula (1), the filtration time per unit volume of the fuel oil composition for internal combustion engine was calculated for each measurement number.
T _n = t _n / (M / d) (1)
In the above formula (1), n is the number of measurements, which is three times. Further, T _n is the filtration time per unit volume of the fuel oil composition for internal combustion engine calculated from the time required for the filtration ^{of the nth measurement (sec / cm 3} ), and t _n is the time required for the filtration of the nth measurement. (Seconds), M is the mass of the filtered fuel oil composition for internal combustion engine (M _1- M ₂ ) (g), and d is the density of the fuel oil composition for internal combustion engine at 15 ° C. (g / cm ³ ). If filtration was not possible due to blockage of the filter paper, it was set as "calculation not possible". Then, from the points plotted with the vertical axis representing the filtration time per unit volume of the fuel oil for internal combustion engine and the horizontal axis representing the number of measurements of the time required for filtration, the slope of the approximate straight line is calculated by the least squares method and filtered. The slope of time was calculated.

(Measurement of properties and composition of fuel oil composition for internal combustion engine)
The properties and composition of the fuel oil compositions of each Example and Comparative Example were measured by the following methods.
(1) Sulfur content: Measured according to JIS K 2541-4: 2003 (Part 4) or JIS K 2541-7: 2003 (Part 7).
(2) Cloudy point: Measured according to JIS K2269: 1987.
(3) Dynamic viscosity at 50 ° C.: Measured according to JIS K 2283: 2000.
(4) Density at 15 ° C.: Measured according to JIS K 2249-1: 2011 (Part 1).
(5) Residual carbon content of 10% residual oil: Measured using 10% residual oil prepared in accordance with JIS K 2270-1: 2009 (Part 1) and Annex A.
(6) Cetane index: Fuel oil standard Z. G. It was measured and calculated based on the total fishing cetane index calculation method specified in ST-1020.
(7) Amount of dry sludge: Fuel oil standard Z. G. It was measured and calculated based on the All Fisheries Federation A heavy oil dry sludge measurement method specified in ST-1010.
(8) Flash point: Measured according to JIS K 2265-3: 2007 (Part 3).
(9) Pour point: Measured according to JIS K 2269: 1987.

(Performance evaluation of fuel oil composition for internal combustion engine)
The performance of the fuel oil compositions of each Example and Comparative Example was evaluated based on the following methods.

1. 1. Evaluation of oil flow performance (normal temperature oil flow performance) For the fuel oil compositions of each Example and Comparative Example, the oil flow test method described in JP-A-2007-197512 was performed, and the oil flow rate for 10 minutes was as follows. It was evaluated according to the criteria of. In this evaluation, if the evaluation is B or higher, the result is passed.
A: The amount of oil passed was 1.00 L or more.
B: The amount of oil passed was 0.60 L or more and less than 1.00 L.
C: The amount of oil passed was less than 0.60 L.
2. Evaluation of oil flow performance (storage stability performance) 3 L of the fuel oil composition of each Example and Comparative Example was used as an evaluation sample, and this was used as an open portion (circle with a diameter of 32.5 mm) on the upper part of a tin 4L can. The oil was collected in a container that allowed air to flow, and stored at room temperature for 90 days. The evaluation sample after storage was evaluated by the same method and criteria as in "1. Evaluation of oil flow performance (normal temperature oil flow performance)" above. In this evaluation, if the evaluation is B or higher, the result is passed.
3. 3. Evaluation of oil flow performance (low temperature oil flow performance) Using 20 g of the fuel oil composition of each example and comparative example as an evaluation sample, a filtration aid (low temperature fluidity improver, "Infineum R240 (model number)", Infinium Japan (Manufactured by the same company) was added in an amount of 200 mass ppm, dissolved, rapidly cooled to -10 ° C., and held for 30 minutes. The oil remaining in the sample was washed 4 times with 40 mL of acetone (160 mL in total), and the wax was dissolved with 300 mL of normal hexane and recovered. After evaporating and removing the normal hexane, the sample dried at 105-110 ° C. was weighed and divided by the weight of the evaluation sample of 20 g as the wax precipitation rate, which was evaluated according to the following criteria. In this evaluation, if the evaluation is B or higher, the result is passed.
A: The wax precipitation rate was 0.20% by mass or less.
B: The wax precipitation rate was more than 0.20% by mass and 0.25% by mass or less.
C: The wax precipitation rate was over 0.25% by mass.

(Combustion performance)
The cetane numbers of the fuel oil compositions of each Example and Comparative Example were evaluated according to the following criteria. In this evaluation, if it is A evaluation, it is passed.
A: The cetane number was 40.0 or more.
C: The cetane number was less than 40.0.

(Environmental performance)
The sulfur content of the fuel oil compositions of each Example and Comparative Example was evaluated according to the following criteria. In this evaluation, if the evaluation is B or higher, the result is passed.
A: The sulfur content was 0.30% by mass or less.
B: The sulfur content was more than 0.30% by mass and 0.50% by mass or less.
C: The sulfur content was more than 0.50% by mass.

(comprehensive evaluation)
In each of the above evaluations of oil flow performance, environmental performance and combustion performance, the lowest evaluation was taken as the comprehensive evaluation. In this evaluation, if the evaluation is B or higher, the result is passed.

(Production of Fuel Oil Compositions of Examples 1 to 3 and Comparative Examples 1 to 3)
The paraffinic hydrocarbon having the properties and composition shown in Table 1 below, the base material (light oil fraction), and the base material having the properties and composition shown in Table 2 (residual carbon source) are mixed at the mixing ratio shown in Table 3. , Examples 1 to 3 and Comparative Examples 1 to 3 were prepared. Tables 3 and 4 show the evaluation results of each performance of each of the obtained fuel oil compositions by the above method.

From the results in Table 3, the fuel oil compositions of the present embodiments of Examples 1 to 3 are excellent in oil flow performance, combustion performance and environmental performance, which have both room temperature oil flow performance, storage stability performance and low temperature oil flow performance. It was confirmed that there was.
On the other hand, the fuel oil composition of Comparative Example 1 containing no paraffinic hydrocarbon is inferior in low-temperature oil passage performance, and the fuel oil composition of Comparative Example 2 containing an excess of paraffinic hydrocarbon is inferior in combustion performance. The fuel oil composition of Comparative Example 3 is a normal temperature oil passing oil, which contains direct-removed heavy oil having a filtration time gradient of 0.30 or less, but does not contain a residual carbon source having a filtration time gradient of 0.30 or less. It was confirmed that the performance and storage stability performance were inferior.

Claims (5)

Paraffinic hydrocarbons satisfying all of the following (a ₁ ) to (d ₁ ) are contained in a content of 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and the following (a ₂ ) and (a 2) and ( A fuel oil composition for an internal combustion engine that satisfies all of the following (1) to (7), which contains a residual carbon source satisfying all of _{b 2) in a content of 0.2% by volume or more based on the total amount of the composition.}
(A ₁ ) Saturation content is 99.0% by mass or more (b ₁ ) Sulfur content is 0.01% by mass or less (c ₁ ) Clouding point is -50.0 ° C or less (d ₁ ) At 50 ° C kinematic viscosity of 5.00 mm ² / s or more 20.00 mm ² / s or less _{(a 2)} the slope of the filtration time is 0.30 or less _(b 2) carbon residue of 10% residual oil is 10.0 wt% or more ( 1) Sulfur content is 0.50% by mass or less (2) Clouding point is -6.0 ° C or less (3) Dynamic viscosity at 50 ° C is 1.80 mm ² / s or more and 3.60 mm ² / s or less (4) ) Density at 15 ° C is 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less (5) Residual carbon content of 10% residual oil is more than 0.20% by mass and 0.60% by mass or less (6) Cetan index 43.0 or more and 50.0 or less (7) Dry sludge amount is 3.0 mg / 100 mL or less The fuel oil composition for an internal combustion engine according to claim 1, wherein the residual carbon source is at least one selected from C heavy oil, atmospheric distillation residual oil, vacuum distillation residual oil, direct desorption heavy oil, cracked heavy oil and extract. Further, claim 1 or 2 includes at least one gas oil fraction selected from a direct gas oil fraction, a vacuum gas oil fraction, a desulfurized gas oil fraction, a decomposed gas oil fraction, a desulfurization gas oil fraction and a direct gas oil fraction. The fuel oil composition for an internal combustion engine according to the description. It contains the paraffin-based hydrocarbon, the residual carbon source and the gas oil fraction, and the gas oil fraction is at least one selected from the gas oil fraction, the desulfurized gas oil fraction, the cracked gas oil fraction, and the gas oil fraction directly removed. The fuel oil composition for an internal combustion engine according to claim 3. Paraffinic hydrocarbons that satisfy all of the following (a ₁ ) to (d _1),
A residual carbon source that satisfies both (a ₂ ) and (b _{2) below,}
The content of the paraffinic hydrocarbon should be 1.0% by volume or more and 9.5% by volume or less based on the total amount of the composition, and the content of the residual carbon source should be 0.2% by volume or more based on the total amount of the composition. A method for producing a fuel oil composition for an internal combustion engine, which satisfies all of the following (1) to (7).
(A ₁ ) Saturation content is 99.0% by mass or more (b ₁ ) Sulfur content is 0.01% by mass or less (c ₁ ) Clouding point is -50.0 ° C or less (d ₁ ) At 50 ° C kinematic viscosity of 5.00 mm ² / s or more 20.00 mm ² / s or less _{(a 2)} the slope of the filtration time is 0.30 or less _(b 2) carbon residue of 10% residual oil is 10.0 wt% or more ( 1) Sulfur content is 0.50% by mass or less (2) Clouding point is -6.0 ° C or less (3) Dynamic viscosity at 50 ° C is 1.80 mm ² / s or more and 3.60 mm ² / s or less (4) ) Density at 15 ° C is 0.8610 g / cm ³ or more and 0.8800 g / cm ³ or less (5) Residual carbon content of 10% residual oil is more than 0.20% by mass and 0.60% by mass or less (6) Cetan index 43.0 or more and 50.0 or less (7) Dry sludge amount is 3.0 mg / 100 mL or less