JP2019151705A - Fuel oil composition for internal combustion engine and manufacturing method therefor - Google Patents

Abstract

To provide a fuel oil composition for internal combustion engine excellent in filtration performance, handling easiness performance, environmental performance and combustion performance while using an ethylene bottom oil effectively, and a manufacturing method therefor.SOLUTION: There are provided a fuel oil composition for internal combustion engine containing an ethylene bottom oil satisfying (a) aromatic component content of 80.0 vol.% or more, (b) sulfur component content of 0.30 mass% or less, (c) flow point of -15.0°C or less, (d) kinematic viscosity at 50°C of 30.0 mm/s or less, (e) flash point of 90.0°C or more, and (f) slope of filtration time of 0.14 or less, with content of 3.0 vol.% to 55.0 vol.% based on all composition amount, and satisfying that (1) sulfur content component based on all composition amount is 0.50 mass% or less, (2) flow point is -5.0°C or less, (3) total calorific value is 40,500 (J/mL) or more, (4) kinetic viscosity at 50°C is 4.20 m/s to 9.80 mm/s, (5) CCAI is 850 or less, and (6) real sediment is 0.05 mass% or less, and a manufacturing method therefor.SELECTED DRAWING: None

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 2 heavy oil (hereinafter also referred to as “B heavy oil”) has a higher calorific value per unit volume than kerosene, light oil, etc., and can reduce the amount of fuel oil used (volume). In addition, it has less sulfur, nitrogen, and residual carbon than C heavy oil (JIS K2205: 2006, three heavy oils), so it can be used as fuel oil for internal combustion engines such as marine diesel engines, and outside of boilers for power generation. Widely used as fuel oil for combustors.

  Also, as the fuel oil for boilers, ethylene bottom oil, which is a fraction (bottom oil) produced in an ethylene production apparatus that produces ethylene, propylene, etc. by thermally decomposing raw oil such as naphtha fraction with steam It has been. Since this ethylene bottom oil has a strong odor, low ignitability and property stability, there is no use other than fuel oil such as boilers, and there is a surplus in refinery and other factory equipment where there is no boiler equipment Is supposed to occur. Under such circumstances, for example, Patent Document 1 proposes a C heavy oil composition containing a hydrogenated ethylene bottom oil. The C heavy oil composition described in Patent Document 1 is capable of effectively utilizing ethylene bottom oil, is difficult to produce sludge, and is excellent in ignition performance and combustion performance. Patent Document 2 proposes an A heavy oil composition containing an ethylene bottom oil hydrotreated. The A heavy oil composition described in Patent Document 2 can effectively use ethylene bottom oil and satisfies both low temperature performance and flammability performance.

JP 2011-012460 A JP 2011-208029 A

  However, since the C heavy oil composition of Patent Document 1 and the A heavy oil composition of Patent Document 2 require hydrogenation treatment of ethylene bottom oil, the supply and demand balance of hydrogen in the factory equipment is disrupted, which is rather expensive. There was a case. Including the heavy oil compositions described in these patent documents, conventional A heavy oil and C heavy oil are usually used when used as fuel oil for internal combustion engines such as diesel engines, particularly large diesel engines such as diesel engines for large ships. Occasionally, the blockage frequency of the fuel oil filter increases, and the blockage frequency tends to become higher 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 “room temperature oil passage performance”) and storage stability performance that maintains the room temperature oil passage performance even after long-term storage. And a fuel oil composition having filtration performance and having both of these requirements.

By the way, especially in the use of large diesel engines such as diesel engines for large ships, the use environment of the fuel oil composition for internal combustion engines changes remarkably, so the fuel oil composition for internal combustion engines responds to changes in the environment. Is required. In particular, it is important to have easy-to-handle performance that does not exhibit significant behavior with respect to changes in the environment such as temperature, such that the fluidity is significantly reduced and stays in the pipe in a low temperature environment. Further, the fuel oil composition for an internal combustion engine has an ignition performance and a stable combustion performance (which may be referred to as “combustion performance”), which are originally required as a fuel oil composition, without any ignition delay, and the like. In recent years, with increasing attention to environmental problems, the amount of use can be reduced by setting a higher total calorific value, and the environmental load can be reduced by reducing the concentration of sulfur oxides in the exhaust gas. Performance is also required.
However, conventional A heavy oil, C heavy oil, etc. cannot be said to satisfy all of filtration performance, easy handling performance, environmental performance and combustion performance, and for internal combustion engines that can satisfy these performances simultaneously. Development of fuel oil compositions is desired.

  As a result of intensive studies in view of the above problems, the present inventor has found that the problem can be solved by the following invention. That is, this invention provides the fuel oil composition for internal combustion engines which has the following structure, and its manufacturing method.

[1] An ethylene bottom oil satisfying any of the following (a) to (f) is contained in a content of 3.0% by volume or more and 55.0% by volume or less based on the total amount of the composition, and the following (1) to ( A fuel oil composition for an internal combustion engine that satisfies all 6).
(A) aromatic content is 80.0% by volume or more (b) sulfur content is 0.30% by mass or less (c) pour point is -15.0 ° C. or less (d) kinematic viscosity at 50 ° C. 30.0 mm ² / s or less (e) Flash point is 90.0 ° C. or more (f) Filtration time slope is 0.14 or less (1) Sulfur content based on total composition is 0.50% by mass or less ( 2) ° C. pour point less than or equal to 0.0 (3) gross calorific value is 41,000 (J / mL) or (4) a kinematic viscosity at 50 ° C. is 5.00 mm ² / s or more 40.0 mm ² / s or less ( 5) CCAI is 870 or less (6) Real segment is 0.10% by mass or less [2] An ethylene bottom oil satisfying any of the following (a) to (f):
At least one gas oil fraction selected from a straight gas oil fraction, a vacuum gas oil fraction, a desulfurized gas oil fraction, a cracked gas oil fraction, a desulfurized cracked gas oil fraction and a direct degasified gas oil fraction, and C heavy oil, atmospheric distillation residue oil , At least one fraction selected from at least one heavy oil fraction selected from vacuum distillation residue oil, direct degasified heavy oil and cracked heavy oil;
The content of the composition of the ethylene bottom oil based on the total amount of the mixture is 3.0 volume% or more and 55.0 volume% or less, and satisfies the following (1) to (6): Manufacturing method.
(A) aromatic content is 80.0% by volume or more (b) sulfur content is 0.30% by mass or less (c) pour point is -15.0 ° C. or less (d) kinematic viscosity at 50 ° C. 30.0 mm ² / s or less (e) Flash point is 90.0 ° C. or more (f) Filtration time slope is 0.14 or less (1) Sulfur content based on total composition is 0.50% by mass or less ( 2) ° C. pour point less than or equal to 0.0 (3) gross calorific value is 41,000 (J / mL) or (4) a kinematic viscosity at 50 ° C. is 5.00 mm ² / s or more 40.0 mm ² / s or less ( 5) CCAI is 870 or less (6) Real Sediment is 0.10 mass% or less

  ADVANTAGE OF THE INVENTION According to this invention, the fuel oil composition for internal combustion engines which is excellent in filtration performance, easy-to-handle performance, environmental performance, and combustion performance, while effectively utilizing ethylene bottom oil, and its manufacturing method can be provided.

[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 “this embodiment”) and a method for producing the same will be described more specifically.
The fuel oil composition for an internal combustion engine of the present embodiment has (a) an aromatic content of 80.0% by mass or more, (b) a sulfur content of 0.30% by mass or less, and (c) a pour point of − 15.0 ° C. or lower, (d) Kinematic viscosity at 50 ° C. is 30.0 mm ² / s or lower, (e) Flash point is 90.0 ° C. or higher, and (f) Filtration time slope is 0.14 or lower. The ethylene bottom oil satisfying the above-mentioned has a content of 3.0 to 55.0% by volume based on the total amount of the composition, and (1) the sulfur content based on the total amount of the composition is 0.50% by mass or less. , (2) a pour point of 0.0 ° C. or less, (3) total calorific value 41,000 (J / mL) above, (4) 50 kinematic viscosity at ° C. is 5.00 mm ² / s or more 40.0 mm ² / S or less, (5) CCAI is 870 or less, and (6) Real Sediment is 0.10% by mass or less. A fuel oil composition.

(Ethylene bottom oil)
The fuel oil composition for an internal combustion engine of the present embodiment is a specific ethylene bottom oil that satisfies all of the following (a) to (f), and is 3.0% by volume or more and 55.0% by volume or less based on the total amount of the composition. It is necessary to include by content. If the content of ethylene bottom oil is less than 3.0% by volume, it cannot be said that ethylene bottom oil is effectively utilized. On the other hand, when the content of the ethylene bottom oil exceeds 40.0% by volume, the CCAI increases, so the combustion performance may decrease. From the viewpoint of effectively using ethylene bottom oil and improving filtration performance, easy handling performance, environmental performance and combustion performance, the content of ethylene bottom oil based on the total composition is preferably 5.0% by volume or more, more preferably Is 10.0% by volume or more, more preferably 15.0% by volume or more, particularly preferably 17.0% by volume or more, and the upper limit is preferably 45.0% by volume or less, more preferably 40.0% by volume or less. More preferably, it is 35.0% by volume or less, and particularly preferably 30.0% by volume or less.

The ethylene bottom oil is a fraction (bottom oil) produced in an ethylene production apparatus for producing ethylene, propylene and the like by thermally decomposing raw oil such as a naphtha fraction together with steam, and the following (a) to It has the property of (f). Hereinafter, the properties of the ethylene bottom oil used in the present embodiment will be described.
(A) Aromatic Content The aromatic content of the ethylene bottom oil used in this embodiment is required to be 80.0% by mass or more. When the aromatic content of the ethylene bottom oil is less than 80.0% by mass, it becomes difficult to suppress the clogging of the fuel oil filter due to the generation of sludge, and it becomes difficult to obtain excellent filtration performance. From the viewpoint of improving filtration performance, easy handling performance, environmental performance and combustion performance, the aromatic content of the ethylene bottom oil is preferably 83.0% by mass or more, more preferably 85.0% by volume or more. In the present embodiment, the ethylene bottom oil usually has a bicyclic aromatic component and a tricyclic aromatic component having two or more cyclic structures in addition to a monocyclic aromatic (monocyclic aromatic) component having a single cyclic structure. The aromatic content is the total content of these aromatic components.
In the present specification, the aromatics content of the ethylene bottom oil and the later-described heavy oil fraction is a value measured by the TLC / FID method specified in IP-469 (IP Test Methods). It is.

(B) Sulfur content The sulfur content of the ethylene bottom oil used in this embodiment is required to be 0.30 mass% or less. If the sulfur content is greater than 0.30% by mass, it will be difficult to reduce the environmental load due to sulfur oxides in the exhaust gas, so excellent environmental performance will not be obtained, and flue corrosion will occur due to a decrease in the acid dew point of the exhaust gas. It becomes easy and the stable operation of the engine becomes difficult. From the viewpoint of excellent environmental performance and stable engine operation, and considering the ease of adjustment of the sulfur content of the fuel oil composition for internal combustion engines to 0.50% by mass or less, the sulfur content is preferably It is 0.25 mass% or less, More preferably, it is 0.23 mass% or less.
In the present specification, the sulfur content is measured by selecting a measurement method according to the content. 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: Measured according to the radiation type excitation method), when the content is 5 to 500 mass ppm (0.0005 to 0.05 mass%), JIS K2541 -7: Value measured according to 2003 (crude oil and petroleum products-sulfur content test method-Part 7: wavelength dispersion fluorescent X-ray method).

(C) Pour point The pour point of the ethylene bottom oil used in this embodiment is required to be -15.0 ° C or lower. When the pour point is higher than -15.0 ° C, the pour point of the fuel oil composition for an internal combustion engine becomes difficult to be 0.0 ° C or less, and excellent easy handling performance cannot be obtained. It may be necessary. From the viewpoint of obtaining better handling ease, the pour point of ethylene bottom oil is preferably −20.0 ° C. or lower, more preferably −25.0 ° C. or lower.
In this specification, the pour point is a value measured according to JIS K 2269: 1987 (pour point of crude oil and petroleum products and petroleum product cloud point test method). Here, as a sample used for the measurement, ethylene bottom oil (or fuel oil composition, gas oil fraction, heavy oil fraction) 500 mL was left at room temperature (10 to 20 ° C.) for 168 hours (7 days), and then 45 ° C. The one that has not been subjected to the preliminary treatment for heating is used.

(D) Kinematic viscosity at 50 ° C. The kinematic viscosity at 50 ° C. of the ethylene bottom oil used in the present embodiment is required to be 30.0 mm ² / s or less. When the kinematic viscosity at 50 ° C. is larger than 30.0 mm ² / s, excellent easy handling performance cannot be obtained, and the upper limit of the kinematic viscosity at 50 ° C. of the fuel oil composition for an internal combustion engine is 40.0 mm ² / s or less. It becomes difficult. From the viewpoint of making the kinematic viscosity at 50 ° C. of the fuel oil composition for an internal combustion machine easily within a predetermined range, improving the ease of handling performance, and obtaining appropriate lubricity, the kinematic viscosity at 50 ° C. of the ethylene bottom oil is preferably 25.0 mm ² / s or less, more preferably 20.0 mm ² / s or less, further preferably not more than 18.0 mm ² / s, there is no particular restriction on the lower limit, existing equipment (pumps, flow meters) When it is easy to use them as they are, it is usually 5.0 mm ² / s or more, preferably 10.0 mm ² / s or more.
In this specification, the kinematic viscosity at 50 ° C. is a value measured according to JIS K 2283: 2000 (kinematic viscosity test method for crude oil and petroleum products).

(E) Flash point The flash point of the ethylene bottom oil used by this embodiment needs to be 90.0 degreeC or more. When the flash point is less than 90.0 ° C., the safety in handling is reduced, the stable operation of the engine tends to be difficult, and the problem of odor is also likely to occur. From the viewpoint of safety in handling, stable engine operation, and odor, the flash point of ethylene bottom oil is preferably 95.0 ° C or higher, more preferably 100.0 ° C or higher, and still more preferably 105.0 ° C or higher. It is.
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: Penschem Lutens sealing method).

(F) Slope of filtration time The slope of the filtration time of the ethylene bottom oil used in this embodiment is required to be 0.14 or less. If the slope of the filtration time exceeds 0.14, the oil permeation performance at normal temperature is lowered, and excellent filtration performance cannot be obtained. From the viewpoint of obtaining better filtration performance, the slope of the filtration time of the ethylene bottom oil is preferably 0.10 or less, more preferably 0.08 or less, and even more preferably 0.06 or less.

In this specification, the slope of the filtration time is a value measured according to the following procedures (I) to (V).
(I) Scale test used in “JIS K2601: 1998-Crude oil test method-14. Water fraction test method 14.2 Water fraction tester” (hereinafter referred to as water fraction tester) A sample line of 100 mL was collected in three or more tubes. Thereafter, centrifugation was performed for 55 minutes at 35 ° C. and a relative centrifugal force of 600 using a centrifuge used in a water fraction tester. Next, three or more 50 mL beakers were prepared, and the upper 50 mL of the sample of three or more scaled test tubes subjected to centrifugation was dispensed into each 50 mL beaker. The beaker after fractionation was weighed in units of 0.1 mg, and the weighed mass was defined as M ₁ (g). Then, the collected sample was heated for 15 minutes in a thermostat kept at 63 ± 1 ° C.
(II) Filter paper (Whatman No. 4 (55 mmφ)) having pores of 20 to 25 μm was placed on a filtration device (hereinafter, filtration device) defined in JPI-5S-60-2000. The filter paper was dried in advance at 110 ° C. for 20 minutes. Further, the upper funnel was stacked and fixed so that there was no leakage of the sample. At this time, packing with holes having a diameter of 28 mm was stacked, and the diameter of the filtration surface was adjusted to 28 mm. Thereafter, a vacuum pump capable of suction at an exhaust speed of 12 L / min was attached to the other end of the vacuum bottle. The upper funnel was also heated to 63 ± 1 ° C. as in the sample.
(III) 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 sample was filtered and the entire surface of the filter paper was exposed (only the filtration surface portion having an inner diameter of 28 mm was sufficient) was measured, and the time required for the measured filtration was defined as t (seconds). In addition, the used beaker was weighed, and the weighed mass was M ₂ (g).
(IV) After stopping the vacuum pump, the same operation as the first sample was repeatedly performed on the second and third samples (third or more if necessary). During this time, there was no action to change the measurement conditions, such as removing the tester or cleaning the equipment. When the sample was not filtered due to the filter paper being blocked, the filtration operation was terminated and the process proceeded to the next step. Specifically, if the filtration was not completed even after 6 minutes from the start of filtration, the filtration operation was terminated. When the filter paper was clogged, the remaining sample was dissolved with toluene and removed with a pipette or the like. And after washing | cleaning 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 edge of the filter paper was colored, the sample was leaking and retested.
(V) From the following formula (1), the filtration time per unit volume of the fuel oil composition for an internal combustion engine of each measurement number was calculated.
T _n = t _n / (M / d) (1)
In said formula (1), n is the frequency | count of a measurement and is 3 times or more. T _n is the filtration time per unit volume of the fuel oil composition for an internal combustion engine calculated from the time required for filtration at the n-th measurement (t / cm ³ ), and t _n is the time required for filtration at the n-th measurement. (Seconds), M is the mass (M ₁ -M ₂ ) (g) of the filtered fuel oil composition for internal combustion engines, and d is the density (g / cm ³ ) of the fuel oil composition for internal combustion engines at 15 ° C. In addition, it was set as "calculation impossible" when it was not able to filter by the blockage of filter paper. Then, from the point plotted with the vertical axis as the filtration time per unit volume of the fuel oil composition for the internal combustion engine and the horizontal axis as the number of times of measurement required for filtration, the slope of the approximate line is calculated by the least square method, and the filtration time The slope of was calculated.

Further, the ethylene bottom oil used in the present embodiment can further have the following properties (g) to (m) in addition to the properties (a) to (f).
(G) Density at 15 ° C. The density at 15 ° C. of the ethylene bottom oil used in this embodiment is preferably 0.9500 g / cm ³ or more, more preferably 0.9750 g / cm ³ or more, and further preferably 1.0000 g. / cm ³ or more, preferably the upper limit is 1.1500G / cm ³ or less, more preferably 1.1000G / cm ³ or less. When the density of ethylene bottom oil at 15 ° C. is within the above range, the total heat generation amount of the fuel oil composition for an internal combustion engine is easily set to 41,000 (J / mL) or more, and fuel oil filter blockage due to sludge generation is suppressed. And the filtration performance is improved.
In this 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).

(H) Distillation property As the distillation property of the ethylene bottom oil used in the present embodiment, the initial boiling point is preferably 210.0 ° C or higher, more preferably 220.0 ° C or higher, and further preferably 225.0 ° C or higher. 5 vol% distillation temperature is preferably 230.0 ° C. or higher, more preferably 235.0 ° C. or higher, still more preferably 240.0 ° C. or higher, and 10 vol% distillation temperature is preferably 240 ° C. or higher. More preferably, it is 245.0 degreeC or more, More preferably, it is 250.0 degreeC or more. When the initial boiling point, 5% by volume distillation temperature and 10% by volume distillation temperature are within the above range, the combustion performance is improved, and the flash point is easily within the above range, and the safety in handling is improved. Stable operation of the engine becomes easy. It is also advantageous in reducing odor.
In this specification, the initial distillation point of distillation property, 5 volume% distillation temperature, and 10 volume% distillation temperature are values measured according to JIS K2254: 1998 (petroleum product-distillation test method-).

(I) Total calorific value The total calorific value of the ethylene bottom oil used in the present embodiment is preferably 42,000 (J / mL) or more, more preferably 43,000 (J / mL) or more, and still more preferably 44. 000 (J / mL) or more, particularly preferably 44,500 (J / mL) or more. When the total calorific value is within the above range, the total calorific value of the fuel oil composition for an internal combustion engine is easily set to 41,000 (J / mL) or more, the effect of reducing the usage amount is improved, and the environmental performance is improved.
In this specification, the total calorific value of the fuel oil composition for an internal combustion engine, the ethylene bottom oil, and the light oil fraction described later can be found in JIS K2279: 2003 (crude oil and petroleum products-calorific value test method and calculation estimation method). It is a value measured according to and estimated (estimated by the calculation formula in the case of A heavy oil and B heavy oil specified in “6. Total calorific value estimation method, 6.3 e) 1)”.

(J) CCAI (Calculated Carbon Aromaticity Index)
The CCAI of the ethylene bottom oil used in this embodiment is preferably 980 or less, more preferably 970 or less, and even more preferably 965 or less. When CCAI is 980 or less, the CCAI of the fuel oil composition for an internal combustion engine is easily set to 870 or less, and more excellent combustion performance is obtained.
In this specification, CCAI is a value calculated from a calculation formula described in Annex F of ISO 8217-2012.

(K) Residual carbon content The residual carbon content of the ethylene bottom oil used in the present embodiment is preferably 10.0% by mass or less, more preferably 9.0% by mass or less, and still more preferably 8.5% by mass or less. is there. When the residual carbon content is within the above range, the combustion performance of the fuel oil composition for an internal combustion engine can be easily maintained, and the effect of reducing soot generation due to poor combustion is improved, so that the engine can be operated more stably.
In the present specification, the residual carbon content is a value measured in accordance with JIS K 2270-1: 2009 (crude oil and petroleum products—how to obtain residual carbon content—Part 1: Conradson method). The residual carbon content of the oil is a value measured using 10% residual oil prepared according to Annex A.

(L) Real Sediment The actual sediment of the ethylene bottom oil used in this embodiment is preferably 0.10% by mass or less, more preferably 0.08% by mass or less, still more preferably 0.06% by mass or less, particularly preferably. Is 0.05 mass% or less. When the actual segment is within the above range, it is advantageous in that particularly excellent filtration performance can be obtained.
In the present specification, the actual sediment is a value measured according to JPI-5S-60-2000 (crude oil and petroleum products-sediment test method).

(M) Water content The water content of the ethylene bottom oil used in the present embodiment is preferably 0.20% by volume or less, more preferably 0.15% by volume or less, still more preferably 0, based on the total amount of the composition. 10% by volume or less. When the water content is within the above range, storage stability can be prevented from lowering (sludge generation by asphaltene and water emulsion) and clogging by sludge can be prevented, so that the filtration performance is improved.
In this specification, the water content of ethylene bottom oil is a value measured according to JIS K 2275-1: 2015 (crude oil and petroleum products—how to obtain moisture—Part 1: distillation method).

(Properties of fuel oil composition for internal combustion engines)
The fuel oil composition for an internal combustion engine of the present embodiment includes the ethylene bottom oil in a content of 3.0% by volume or more and 55.0% by volume or less based on the total amount of the composition, and the following (1) to (6) It has the following properties. Hereinafter, the properties (1) to (6) of 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 an internal combustion engine of the present embodiment is required to be 0.50 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 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. This makes it 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 0.38% by mass or less.

(2) Pour point The pour point of the fuel oil composition for internal combustion engines of this embodiment needs to be 0.0 degrees C or less. When the pour point is higher than 0.0 ° C., excellent easy-to-handle performance cannot be obtained. The pour point is preferably −2.5 ° C. or less from the viewpoint of obtaining better handling performance.

(3) Total calorific value The total calorific value of the fuel oil composition for internal combustion engines of this embodiment needs to be 41,000 (J / mL) or more. If the total calorific value is less than 41,000 (J / mL), the effect of reducing the amount of fuel oil composition for an internal combustion engine cannot be obtained, and excellent environmental performance cannot be obtained. From the viewpoint of obtaining excellent environmental performance, the total calorific value is preferably 41,500 (J / mL) or more, more preferably 41,800 (J / mL) or more.

(4) 50 kinematic viscosity at 50 ° C. for an internal combustion engine fuel oil composition kinematic viscosity present embodiment in ° C. is required to be 5.00 mm ² / s or more 40.0mm at ² / s or less. If the kinematic viscosity at 50 ° C. is greater than 40.0 mm ² / s, excellent ease of handling performance cannot be obtained, and if it is less than 5.00 mm ² / s, the existing equipment (pump, flow meter), etc. remains as it is It becomes difficult to use. From the viewpoint of improving easy handling performance and obtaining appropriate lubricity, the kinematic viscosity at 50 ° C. of the fuel oil composition for an internal combustion engine is preferably 10.0 mm ² / s or more, more preferably 15.0 mm ² / s. or more, more preferably 20.0 mm ² / s or more, upper limit is preferably 35.0 mm ² / s or less, more preferably 30.0 mm ² / s or less, more preferably is less 25.0 mm ² / s .

(5) CCAI
CCAI of the fuel oil composition for internal combustion engines of this embodiment needs to be 870 or less. When CCAI exceeds 870, excellent combustion performance cannot be obtained. From the viewpoint of obtaining better combustion performance, the CCAI of the fuel oil composition for an internal combustion engine is preferably 865 or less, more preferably 860 or less.

(6) Real Sediment The actual sediment of the fuel oil composition for internal combustion engines of this embodiment needs to be 0.10 mass% or less. If the actual sediment is larger than 0.10% by mass, the oil permeation performance after storage of fuel oil cannot be obtained, and excellent filtration performance cannot be obtained. From the viewpoint of improving the filtration performance, the actual sediment of the fuel oil composition for an internal combustion engine is preferably 0.09% by mass or less, more preferably 0.08% by mass or less, still more preferably 0.05% by mass or less, particularly preferably. Is 0.02 mass% or less.

In addition to the properties (1) to (6), the fuel oil composition for an internal combustion machine of the present embodiment can further have properties (7) to (14) below.
(7) Density at 15 ° C. The density at 15 ° C. of the fuel oil composition for an internal combustion engine of the present embodiment is preferably 0.9400 g / cm ³ or more, more preferably 0.9450 g / cm ³ or more, and still more preferably 0.8. It is 9500 g / cm ³ or more, particularly preferably 0.9570 g / cm ³ or more, and the upper limit is preferably 0.9650 g / cm ³ or less, more preferably 0.9600 g / cm ³ or less. When the density at 15 ° C. is within the above range, for example, it becomes difficult to reduce the sludge separation performance by a centrifugal separator attached in front of a large diesel engine such as a large ship diesel engine, and the filtration performance is improved. To do. Moreover, it becomes easy to make the total calorific value of the fuel oil composition for an internal combustion engine 41,000 (J / mL) or more.

(8) Reaction test It is preferable that the fuel oil composition for internal combustion engines of this embodiment is neutral in the result of the petroleum product-reaction test according to JIS K 2252: 1998. By being neutral, corrosion of auxiliary equipment such as a fuel oil tank, piping, a diesel engine, and an equipped pump can be prevented, and stable operation of the engine is facilitated.

(9) Flash point The flash point of the fuel oil composition for an internal combustion engine of the present embodiment is preferably 70.0 ° C or higher, more preferably 85.0 ° C or higher, still more preferably 100.0 ° C or higher, particularly preferably 110. It is 0 ° C or higher. The higher the flash point is in the above range, the better the safety in handling and the easier the engine can be operated.

(10) Residual carbon content The residual carbon content of the fuel oil composition for an internal combustion engine of the present embodiment is preferably 5.0% by mass or less, more preferably 4.8% by mass or less, and still more preferably, based on the amount of the composition material. It is 4.5 mass% or less. When the residual carbon content is within the above range, the combustion performance of the fuel oil composition for an internal combustion engine can be easily maintained, and the effect of reducing soot generation due to poor combustion is improved, so that the engine can be operated more stably. The lower limit of the residual carbon content is preferably more than 0.2% by mass as the residual carbon content of 10% residual oil from the viewpoint of tax law.

(11) Water content The water content of the fuel oil composition for internal combustion engines of the present embodiment is preferably 0.20% by volume or less, more preferably 0.15% by volume or less, and still more preferably, based on the total amount of the composition. It is 0.10 volume% or less. When the water content is within the above range, storage stability can be prevented from lowering (sludge generation by asphaltene and water emulsion) and clogging by sludge can be prevented, so that the filtration performance is improved.
In the present specification, the water content of the fuel oil composition for an internal combustion engine, a light oil fraction and a heavy oil fraction, which will be described later, is JIS K 2275-3: 2015 (crude oil and petroleum products—how to obtain moisture—Part 3: Carl It is a value measured according to the Fischer-type coulometric titration method.

(12) Ash content The ash content of the fuel oil composition for internal combustion engines of the present embodiment is preferably 0.05% by mass or less, more preferably 0.03% by mass or less, and still more preferably 0.8% by mass based on the total amount of the composition. 01% by mass or less. When the ash content is within the above range, excellent performance of suppressing the wear of a diesel engine cylinder or the like can be obtained, and stable engine operation becomes easy.
The amount of ash in the fuel oil composition for an internal combustion engine of the present embodiment is a value measured according to JIS K 2272: 1998 (crude oil and petroleum products—ash and sulfated ash test method).

(13) Copper plate corrosion It is preferable that the copper plate corrosion of the fuel oil composition for internal combustion engines of this embodiment is 1 or less. If the copper plate corrosion is 1 or less, corrosion of auxiliary equipment such as a fuel oil tank, piping, diesel engine, and equipped pump can be prevented, and stable operation of the engine becomes easy.
The copper plate corrosion of the fuel oil composition for an internal combustion engine of the present embodiment is measured according to JIS K 2513: 2000 (petroleum product—copper plate corrosion test method).

(14) Aluminum content The aluminum content of the internal combustion engine fuel oil composition of the present embodiment is preferably 5.0 ppm by mass or less, more preferably 3.0 ppm by mass or less, and still more preferably, based on the total amount of the composition. It is 2.0 mass ppm or less. When the aluminum content is within the above range, wear of diesel engine cylinders, etc., heat transfer failure due to adhesion of aluminum to the combustion chamber and heat transfer surface of the diesel engine are suppressed, and stable engine operation becomes easier. .
The aluminum content in the fuel oil composition for an internal combustion engine of the present embodiment is a value measured according to JPI-5S-62-2011 (petroleum product—metal content test method).

In the present embodiment, the fuel oil composition for an internal combustion engine has the properties (1) to (6) above, preferably further has the properties (7) to (14) above, and particularly filtration. Focusing on improving the performance, the properties (7) and (11) above, more specifically, (7) the density at 15 ° C. is 0.9650 g / cm ³ or less, and (11) the moisture content is 0. More preferably, it has a property of 20% by volume or less.

(Base material)
The fuel oil composition for an internal combustion engine of the present embodiment can contain, for example, the following various light oil fractions and heavy oil fractions as a base material in addition to the ethylene bottom oil.

(Light oil fraction)
Preferred examples of the light oil fraction include the following straight-run gas oil fraction, reduced-pressure gas oil fraction, desulfurized gas oil fraction, cracked gas oil fraction, desulfurized cracked gas oil fraction, and directly degassed gas oil fraction. By using these fractions, the properties (1) to (6) and (7) to (14) are easily obtained, and the filtration performance, easy handling performance, environmental performance and combustion performance are improved. be able to. In particular, considering the filtration performance, a cracked light oil fraction, a desulfurized cracked light oil fraction, and a directly degassed light oil fraction are more preferable, and a cracked light oil fraction is more preferable. As a light oil fraction, the following fractions can be used individually or in combination of multiple types.
・ Direct-run gas oil fraction (light oil fraction obtained by atmospheric distillation of crude oil with atmospheric distillation equipment)
-Vacuum gas oil fraction (a gas oil fraction obtained by vacuum distillation of atmospheric distillation residue oil with a vacuum distillation device)
・ Desulfurized gas oil fraction (diesel oil fraction / decomposed gas oil fraction obtained by desulfurizing DC gas oil fraction and / or vacuum gas oil fraction (fluid catalytic cracking of atmospheric distillation residue oil and / or vacuum distillation residue oil) Diesel oil fraction obtained)
・ Desulfurized cracked diesel oil fraction (gas oil fraction obtained by desulfurizing cracked diesel oil fraction)
・ Direct degassing light oil fraction (light oil fraction obtained by desulfurizing atmospheric distillation residue oil and / or vacuum distillation residue oil directly with desulfurization equipment)

(Properties of light oil fraction)
The properties of the light oil fraction used in this embodiment preferably have the following density at 15 ° C., kinematic viscosity at 50 ° C., sulfur content, and sulfur content. By having such a property, it becomes easy to obtain more excellent filtration performance.
Density at 15 ℃ is preferably 0.8300g / cm ³ or more, more preferably 0.8750g / cm ³ or more, more preferably 0.9000g / cm ³ or more and the upper limit is 0.9250g / cm ³ or less preferable.
Kinematic viscosity at 50 ° C. is preferably below 2.70 mm ² / s, more preferably not more than 2.30 mm ² / s, more preferably less 2.00 mm ² / s, also 1.80 mm ² / s or more as a lower limit Is preferred.
The sulfur content is preferably 0.30% by mass or less, more preferably 0.28% by mass or less, and further preferably 0.26% by mass or less.
The aromatic content is preferably 20.0% by volume or more, more preferably 40.0% by volume or more, still more preferably 60.0% by volume or more, and particularly preferably 70.0% by volume or more. In the present specification, the aromatic content of the gas oil fraction is determined by the petroleum product-hydrocarbon type test method-high performance liquid chromatography method (High Performance Liquid Chromatography method) defined in JPI-5S-49-2007. The value to be measured.

In addition to the above properties, the properties of the light oil fraction used in the present embodiment further include properties such as the following flash point, pour point, total calorific value, CCAI, and residual carbon content. By using a light oil fraction having the following properties, more excellent filtration performance, easy handling performance, environmental performance and combustion performance can be obtained.
The flash point is preferably 60.0 ° C or higher, more preferably 62.0 ° C or higher, and still more preferably 65.0 ° C or higher.
The pour point is preferably -10.0 ° C or lower, more preferably -15.0 ° C or lower, and further preferably -20.0 ° C or lower.
The total calorific value is preferably 38,000 (J / mL) or more, more preferably 39,000 (J / mL) or more, further preferably 40,000 (J / mL) or more, particularly 40,500 (J / mL). mL) or more.
CCAI is preferably 900 or less, more preferably 890 or less, and the lower limit is not particularly limited, but is preferably 800 or more, more preferably 820 or more.
Further, 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 0.1% by mass or less.

(Heavy oil fraction)
Preferred heavy oil fractions include, for example, the following C heavy oil, atmospheric distillation residue oil, vacuum distillation residue oil, direct desorption heavy oil and cracked heavy oil. By using these fractions, the properties (1) to (6) and (7) to (14) are easily obtained, and the filtration performance, easy handling performance, environmental performance and combustion performance are improved. be able to. In particular, in view of filtration performance and environmental performance, ease of handling, etc., directly removed heavy oil and decomposed heavy oil are more preferable, and directly removed heavy oil is more preferable. As a heavy oil fraction, the following fractions can be used alone or in combination of two or more.
・ C heavy oil ・ Atmospheric distillation residue oil (residual oil obtained by atmospheric distillation of crude oil with atmospheric distillation equipment)
-Vacuum distillation residue oil (residual oil obtained by vacuum distillation of atmospheric distillation residue oil with a vacuum distillation device)
・ Direct degassing heavy oil (heavy oil obtained by desulfurizing atmospheric distillation residue oil and / or vacuum distillation residue oil directly with desulfurization equipment)
・ Decomposed heavy oil (heavy oil obtained by fluid contact cracking of directly desorbed heavy oil)

(Properties of heavy oil fraction)
The properties of the heavy oil fraction used in this embodiment preferably have the following sulfur content, aromatic content, and CCAI properties. By having such properties, more excellent filtration performance and environmental performance are easily obtained.
The sulfur content is preferably 0.60% by mass or less, and more preferably 0.55% by mass or less. Moreover, as a lower limit, it is 0.51 mass% or more normally.
The aromatic content is preferably 40.0% by mass or more, more preferably 50.0% by mass or more, and still more preferably 55.0% by mass or more.
CCAI is preferably 830 or less, more preferably 820 or less, and even more preferably 810 or less.

In addition to the above properties, the heavy oil fraction used in the present embodiment further has the following density at 15 ° C., kinematic viscosity at 50 ° C., flash point, pour point, total calorific value, residual carbon content. And the like.
Density at 15 ℃ is preferably 0.8800g / cm ³ or more, more preferably 0.9000g / cm ³ or more, more preferably 0.9200g / cm ³ or more and the upper limit is 0.9500g / cm ³ or less preferable.
Kinematic viscosity at 50 ° C. is preferably less 190.0mm ² / s, more preferably not more than 180.0mm ² / s, more preferably less 160.0mm ² / s, also 30.0 mm ² / s or more as a lower limit The degree, preferably 50.0 mm ² / s or more.
The flash point is preferably 150.0 ° C or higher, more preferably 170.0 ° C or higher, and further preferably 190.0 ° C or higher.
The pour point is preferably 15.0 ° C or lower, more preferably 12.5 ° C or lower, and still more preferably 10.0 ° C or lower.
The total calorific value is preferably 40,000 (J / mL) or more, more preferably 40,500 (J / mL) or more, and further preferably 41,000 (J / mL) or more. In this specification, the total calorific value of heavy oil fraction is measured according to JIS K2279: 2003 (crude oil and petroleum products-calorific value test method and estimation method by calculation-) and estimated ("6. Total calorific value estimation"). Method, 6.3 e) is a value estimated by a calculation formula in the case of C heavy oil defined in 2) ”.
The residual carbon content is preferably 8.0% by mass or less, more preferably 6.0% by mass or less, and still more preferably 5.0% by mass or less.

  The fuel oil composition for an internal combustion engine of the present embodiment has the ethylene bottom oil, a light oil fraction and a heavy oil fraction so as to satisfy the properties (1) to (6), and further (7) to (14). It can be prepared by containing at least one fraction selected from the components in any content. In this case, at least one selected from the above-mentioned straight-run gas oil fraction, reduced-pressure gas oil fraction, desulfurized gas oil fraction, cracked gas oil fraction, desulfurized cracked gas oil fraction, and directly degasified gas oil fraction can be used as the gas oil fraction. Further, as the heavy oil fraction, at least one selected from the above C heavy oil, atmospheric distillation residue oil, vacuum distillation residue oil, direct desulfurization oil and cracked heavy oil can be used. Moreover, in this embodiment, the combination of the said ethylene bottom oil, a light oil fraction, and a heavy oil fraction is preferable. Thus, when the ethylene bottom oil is used in combination with various fractions such as a light oil fraction and a heavy oil fraction, the properties (1) to (6) and further (7) to (14) are satisfied. It becomes easy to let you.

  In the present embodiment, the content of the gas oil fraction based on the total composition may be appropriately adjusted so that the obtained fuel oil composition for an internal combustion engine satisfies the properties (1) to (6) above. There is no limitation, and from the viewpoint of obtaining better filtration performance, easy handling performance, environmental performance and combustion performance, preferably 5.0% by volume or more, more preferably 10.0% by volume or more, and further preferably 15.0% by volume. The upper limit is preferably 45.0% by volume or less, more preferably 35.0% by volume or less, and still more preferably 30.0% by volume or less.

  In the present embodiment, the content based on the total composition of the heavy oil fraction may be appropriately adjusted so that the obtained fuel oil composition for an internal combustion engine satisfies the properties (1) to (6) above. There is no restriction, and from the viewpoint of obtaining better filtration performance, easy handling performance, environmental performance and combustion performance, preferably 35.0% by volume or more, more preferably 40.0% by volume or more, and further preferably 45.0% by volume. The upper limit is preferably 70.0% by volume or less, more preferably 60.0% by volume or less, and still more preferably 55.0% by volume or less.

(Other additives)
Various additives such as pour point depressants, combustion accelerators, detergents, sludge dispersants and the like are appropriately added to the fuel oil composition for an internal combustion engine of the present embodiment as long as the above properties can be maintained. Can be selected and blended.

(Use of fuel oil composition for internal combustion engines)
The fuel oil composition of the present embodiment is used for an internal combustion engine, and has characteristics such as excellent filtration performance, easy handling performance, environmental performance, and combustion performance. Therefore, it is suitably used particularly for an internal combustion engine such as a marine diesel engine, and particularly suitable for a large diesel engine such as a large marine diesel engine having a pretreatment device including a centrifugal separator.

[Method for producing fuel oil composition for internal combustion engine]
The method for producing a fuel oil composition for an internal combustion engine of the present embodiment includes the above-mentioned ethylene bottom oil, straight-run gas oil fraction, vacuum gas oil fraction, desulfurized gas oil fraction, cracked gas oil fraction, desulfurized cracked gas oil fraction, and direct desulfurization. And at least one fraction selected from at least one kind of light oil fraction selected from gas oil fractions, and at least one kind of heavy oil fraction selected from C heavy oil, atmospheric distillation residue oil, vacuum distillation residue oil, direct desulfurized oil and cracked heavy oil, and The content of the ethylene bottom oil composition based on the total amount of the composition is 3.0% by volume or more and 55.0% by volume or less, and satisfies the properties (1) to (6) above. A method for producing a fuel oil composition. The fuel oil composition for internal combustion engines of this embodiment can be manufactured by the manufacturing method of the fuel oil composition for internal combustion engines of this embodiment mentioned above, for example.
In the production method of the present embodiment, the properties (1) to (6) of the ethylene bottom oil, each light oil fraction, each heavy oil fraction, and the fuel oil composition for an internal combustion engine are the same as those of the fuel oil composition for an internal combustion engine. Same as described. Further, in the production method of the present embodiment, for example, preferable aspects such as the properties (7) to (14) and the content of each fraction that the fuel oil composition for an internal combustion engine preferably has include the above fuel oil composition for an internal combustion engine. Is the same as described above.

  In the production method of the present embodiment, the contents of the ethylene bottom oil, light oil fraction, and heavy 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 ethylene bottom oil composition based on the total amount is set to 3.0% by volume or more and 55.0% by volume or less, and the light oil fraction and the heavy oil fraction are selected from those exemplified above, and the contents thereof are Within the above range, the properties (1) to (6) and (7) to (14) are easily obtained as the properties of the fuel oil composition for an internal combustion engine.

  EXAMPLES Next, although an Example demonstrates this invention further more concretely, this invention is not restrict | limited at all by these examples.

(Measurement of substrate properties)
The properties of the ethylene bottom oil and the base material used in each example and comparative example were measured by the following methods.
(A) Aromatic content: The aromatic content of the gas oil fraction is defined by JPI-5S-49-2007, petroleum product-hydrocarbon type test method-high performance liquid chromatography method (High Performance Liquid). Chromatography method). Moreover, the aromatic content of ethylene bottom oil and heavy oil fraction was measured according to the TLC / FID method defined in IP-469 (International Standard Test Method (IP Test Methods)).
(B) Sulfur content: The sulfur content of ethylene bottom oil, cracked gas oil fraction, direct degasified gas oil fraction and heavy oil fraction was measured according to JIS K 2541-4: 2003 (Part 4). . Further, the sulfur content of the desulfurized gas oil fraction was measured according to JIS K2541-7: 2003 (Part 7).
(C) Pour point: Measured according to JIS K 2269: 1987.
(D) Kinematic viscosity at 50 ° C .: Measured according to JIS K 2283: 2000.
(E) Flash point: Measured according to JIS K 2265-3: 2007 (Part 3).
(F) Slope of filtration time: measured and calculated by the method described above.
(G) Density at 15 ° C .: Measured according to JIS K 2249-1: 2011 (Part 1).
(H) Distillation property: Measured according to JIS K2254: 1998.
(I) Total calorific value: For ethylene bottom oil and light oil fraction, it is measured according to JIS K2279: 2003, and is specified as an estimate ("6. Total calorific value estimation method, 6.3 e) 1)". (Estimated by calculation formulas for A heavy oil and B heavy oil). The heavy oil fraction was measured according to JIS K2279: 2003 (crude oil and petroleum products-calorific value test method and calculation estimation method-) and estimated ("6. Total calorific value estimation method, 6.3 e ) Estimated by the calculation formula in the case of C heavy oil specified in 2).
(J) CCAI: Calculated from the calculation formula described in Annex F of ISO 8217-2012.
(K) Residual carbon content: Measured according to JIS K 2270-1: 2009 (Part 1). Further, when measuring the residual carbon content of 10% residual oil, 10% residual oil prepared according to Annex A was used.
(L) Real Sediment: Measured according to JPI-5S-60-2000.
(M) Moisture content: ethylene bottom oil is measured according to JIS K 2275-1: 2015 (Part 1), and light oil and heavy oil fractions are according to JIS K2275-3: 2015 (Part 3). Measured.

(Measurement of properties of fuel oil composition for internal combustion engines)
About the property of the fuel oil composition of each Example and a comparative example, it measured with the following method.
(1) Sulfur content: Measured according to JIS K2541-4: 2003 (Part 4).
(2) Pour point: Measured according to JIS K 2269: 1987.
(3) Total calorific value: Measured according to JIS K2279: 2003 and calculated for A heavy oil and B heavy oil specified in “6. Total calorific value estimation method, 6.3 e) 1)” Estimated).
(4) Kinematic viscosity at 50 ° C .: measured according to JIS K 2283: 2000.
(5) CCAI: Calculated from the calculation formula described in Annex F of ISO 8217-2012.
(6) Real Sediment: Measured according to JPI-5S-60-2000.
(7) Density at 15 ° C .: Measured according to JIS K 2249-1: 2011 (Part 1).
(8) Reaction test: Measured by a petroleum product-reaction test according to JIS K 2252: 1998.
(9) Flash point: Measured according to JIS K 2265-3: 2007 (Part 3).
(10) Residual carbon content: Measured according to JIS K 2270-1: 2009 (Part 1).
(11) Water content: Measured according to JIS K 2275-3: 2015 (Part 3).
(12) Ash content: Measured according to JIS K 2272: 1998.
(13) Copper plate corrosion: measured according to JIS K 2513: 2000.
(14) Aluminum content: Measured according to JPI-5S-62-2011.

(Performance evaluation of fuel oil composition for internal combustion engines)
About the fuel oil composition for internal combustion engines of each Example and a comparative example, performance evaluation was performed based on the following method.

(Evaluation of filtration performance (normal temperature oil passage performance))
For the fuel oil compositions of the examples and comparative examples, in the method for measuring the slope of the filtration time of the ethylene bottom oil, the temperature condition at the time of centrifugation was set to 40 ° C., and the temperature of the thermostatic chamber and the upper funnel was set to 68 ±. The slope of the filtration time was calculated in the same manner as the method for measuring the slope of the filtration time of ethylene bottom oil except that the temperature was 1 ° C. The “gradient of filtration time” calculated by the above method was evaluated according to the following criteria to evaluate filtration performance. In this evaluation, if it is more than B evaluation, it is a pass.
A: The slope of the filtration time was 0.07 or less.
B: The slope of the filtration time was more than 0.07 and 0.12 or less.
D: The slope of the filtration time was more than 0.12.

(Evaluation of filtration performance (storage stability))
3 L of the fuel oil composition of each example and comparative example was used as an evaluation sample, and this was provided with an open portion (circular diameter: 32.5 mm) on the top of a tin 4 L can to allow air to flow. The sample was collected in a container and stored at room temperature for 90 days. About the evaluation sample after storage, it evaluated by the same method as the above (evaluation of filtration performance (normal temperature oil-permeable performance)). The evaluation criteria are also the same as the evaluation criteria described above (evaluation of filtration performance (normal temperature oil passing performance)).

(Evaluation of easy handling performance)
Kinematic viscosity standards (a _{1 to} a ₃ ) and pour points at 50 ° C. when the kinematic viscosities and pour points at 50 ° C. were measured by the above methods for the fuel oil compositions for internal combustion engines of the examples and comparative examples. The easy-to-handle performance was evaluated according to the following criteria based on the criteria (b _{1 to} b ₃ ). In this evaluation, if it is more than C evaluation, it is a pass.
A; a ₁ and b ₁ were satisfied.
B; a ₁ and b ₂ , a ₂ and b ₁ , or a ₂ and b ₂ were satisfied.
C; a ₃ and b ₁ , or a ₃ and b ₂ were satisfied.
D: Other than the above A to C.
The kinematic viscosity standard (a _{1 to} a ₃ ) and the pour point standard (b _{1 to} b ₂ ) at 50 ° C. are as follows.
(Standard of kinematic viscosity at 50 ° C. (a _{1 to} a ₃ ))
a ₁ ; The kinematic viscosity at 50 ° C. was 15.0 mm ² / s or more and 25.0 mm ² / s or less.
a ₂ ; The kinematic viscosity at 50 ° C. was 10.0 mm ² / s or more and less than 15.0 mm ² / s, or 25.0 mm ² / s and more than 30.0 mm ² / s.
a ₃ ; The kinematic viscosity at 50 ° C. was 5.0 mm ² / s or more and less than 10.0 mm ² / s, or 30.0 mm ² / s and 40.0 mm ² / s or less.
(Pour point standard (b _{1 to} b ₃ ))
b ₁ ; The pour point was −2.5 ° C. or lower.
b ₂ ; Pour point was more than −2.5 ° C. and 0.0 ° C. or less.

(Environmental performance)
With respect to the fuel oil compositions for internal combustion engines of each Example and Comparative Example, the total calorific value was measured by the above method and evaluated according to the following criteria. In this evaluation, if it is more than B evaluation, it is a pass.
A: The total calorific value was 41,500 J / mL or more.
B: The total calorific value was 41,000 J / mL or more and less than 41,500 J / mL.
D: The total calorific value was less than 41,000 J / mL.

(Combustion performance)
For the fuel oil compositions for internal combustion engines of each Example and Comparative Example, CCAI was measured by the above method and evaluated according to the following criteria. In this evaluation, if it is more than B evaluation, it is a pass.
A: CCAI was 860 or less.
B: CCAI was more than 860 and less than 870.
D: CCAI was over 870.

(Comprehensive evaluation)
In each evaluation of the said filtration performance, easy-to-handle performance, environmental performance, and combustion performance, the lowest evaluation was made into comprehensive evaluation. In this evaluation, if it is more than C evaluation, it is a pass.

(Production of fuel oil compositions of Examples 1 to 3 and Comparative Examples 1 to 5)
The ethylene bottom oil and base material (heavy oil fraction and light oil fraction) having the properties shown in Table 1 below are mixed at the mixing ratios shown in Tables 2 and 3, and for the internal combustion machines of Examples 1 to 3 and Comparative Examples 1 to 5 A fuel oil composition was prepared. Tables 2 and 3 show the evaluation results of the respective performances of the obtained fuel oil compositions for internal combustion engines by the above method.

* 1: Volume% for cracked light oil, direct desulfurized light oil, and desulfurized light oil, and mass% for ethylene bottom oil and direct desorbed heavy oil.
* 2. In the case of cracked light oil, direct desulfurized light oil, and desulfurized light oil, the residual carbon content of 10% residual oil.

  From the results in Table 2, it was confirmed that the fuel oil composition of the present embodiment was excellent in filtration performance having both normal temperature oil passage performance and storage stability performance, as well as easy handling performance, environmental performance, and combustion performance. On the other hand, from the results of Table 3, since the fuel oil composition of the comparative example does not have a part of the configuration of the fuel oil composition of the present embodiment, filtration performance, easy handling performance, environmental performance, It became inferior to any one of the combustion performance.

Claims (4)

An ethylene bottom oil satisfying any of the following (a) to (f) is contained at a content of 3.0% by volume or more and 55.0% by volume or less based on the total amount of the composition, and the following (1) to (6): A fuel oil composition for an internal combustion engine that satisfies both requirements.
(A) aromatic content is 80.0% by mass or more (b) sulfur content is 0.30% by mass or less (c) pour point is -15.0 ° C. or less (d) kinematic viscosity at 50 ° C. 30.0 mm ² / s or less (e) Flash point is 90.0 ° C. or more (f) Filtration time slope is 0.14 or less (1) Sulfur content based on total composition is 0.50% by mass or less ( 2) ° C. pour point less than or equal to 0.0 (3) gross calorific value is 41,000 (J / mL) or (4) a kinematic viscosity at 50 ° C. is 5.00 mm ² / s or more 40.0 mm ² / s or less ( 5) CCAI is 870 or less (6) Real Sediment is 0.10 mass% or less   At least one heavy oil fraction selected from C heavy oil, atmospheric distillation residue oil, vacuum distillation residue oil, direct desulfurized heavy oil and cracked heavy oil, straight run gas oil fraction, vacuum gas oil fraction, desulfurized gas oil fraction, cracked gas oil fraction And a desulfurization cracking light oil fraction and at least one kind of light oil fraction selected from a direct degasification light oil fraction, and the content of the composition based on the total amount of the heavy oil fraction is 35.0 2. The fuel oil composition for an internal combustion engine according to claim 1, wherein the fuel oil composition is not less than 7% and not more than 70.0% by volume.   The fuel oil composition for an internal combustion engine according to claim 1 or 2, which is used for a diesel engine having a pretreatment device including a centrifugal separator. An ethylene bottom oil satisfying any of the following (a) to (f):
At least one gas oil fraction selected from a straight gas oil fraction, a vacuum gas oil fraction, a desulfurized gas oil fraction, a cracked gas oil fraction, a desulfurized cracked gas oil fraction and a direct degasified gas oil fraction, and C heavy oil, atmospheric distillation residue oil , At least one fraction selected from at least one heavy oil fraction selected from vacuum distillation residue oil, direct degasified heavy oil and cracked heavy oil;
The content of the composition of the ethylene bottom oil based on the total amount of the mixture is 3.0 volume% or more and 55.0 volume% or less, and satisfies the following (1) to (6): Manufacturing method.
(A) aromatic content is 80.0% by mass or more (b) sulfur content is 0.30% by mass or less (c) pour point is -15.0 ° C. or less (d) kinematic viscosity at 50 ° C. 30.0 mm ² / s or less (e) Flash point is 90.0 ° C. or more (f) Filtration time slope is 0.14 or less (1) Sulfur content based on total composition is 0.50% by mass or less ( 2) ° C. pour point less than or equal to 0.0 (3) gross calorific value is 41,000 (J / mL) or (4) a kinematic viscosity at 50 ° C. is 5.00 mm ² / s or more 40.0 mm ² / s or less ( 5) CCAI is 870 or less (6) Real Sediment is 0.10 mass% or less