JP6941581B2 - Fuel oil composition and its manufacturing method - Google Patents

Description

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

In recent years, it has been required to reduce the sulfur content of fuel oil because environmental pollutants such as sulfur oxides caused by the sulfur content contained in the fuel oil are generated during combustion.
Conventionally, fuel oil equivalent to C heavy oil is a product prepared by mixing a relatively light base material such as a light oil fraction with a reduced pressure residue obtained in a petroleum refining process to obtain a desired viscosity and sulfur content. It is used in boilers and diesel engines. However, since the reduced pressure residue is a base material having a very high sulfur content, it is desired to use a base material having a relatively low sulfur content in order to reduce the sulfur content in the fuel oil.

In addition, most of the fuel oil equivalent to C heavy oil is stored at a temperature higher than room temperature in the shipping base or the user's tank. As a result, the equilibrium state of components such as asphaltene contained in the fuel oil may be disrupted, and sediments (precipitates) may be generated. Therefore, storage stability is required for fuel oil equivalent to heavy fuel oil C.
It is important to suppress the generation of fuel oil, because the fuel oil equivalent to heavy fuel oil C containing the sedge may interfere with the normal operation of the fuel system in the engine used and cause combustion failure.
The cause of the formation of sediment in the fuel oil equivalent to C heavy oil is that a part of the fuel oil is oxidized and altered by a small amount of dissolved oxygen contained in the fuel oil, and asphaltene micelle and marten are caused by the thermal history. It is considered that the balance is lost (see, for example, Non-Patent Document 1).
Further, as a fuel oil composition having a low sulfur content and suppressing the generation of sediments during preparation, a heavy oil containing a desired amount of directly desulfurized heavy oil and a desired amount of a slurry oil and a specific high-viscosity mixed base material, respectively. The composition is disclosed (see, for example, Patent Document 1).

JP-A-2014-028977

"Science of Marine Fuel" (Narishando Bookstore), pp. 100-107

As described above, the fuel oil equivalent to C heavy oil is stored for a relatively long period of time in the shipping base or the user's tank. Therefore, it is difficult to judge whether practical storage stability is obtained only by measuring the amount of sediment in fuel at the product shipping stage, and management that can predict the amount of sediment generated in fuel oil during medium- to long-term storage. Is required.

Examples of the heavy base material for reducing sulfur include direct desulfurized heavy oil in which the residue is directly desulfurized by a desulfurization apparatus. Direct desulfurized heavy oil has a lower sulfur content than the conventional vacuum residue, which is a base material, but sediment is likely to occur due to heat received in the desulfurization step.
Further, the fuel oil composition described in Patent Document 1 is required to have both a further reduction in sulfur content and a reduction in the amount of sediment in long-term storage.
In view of the above circumstances, it is an object of the present invention to provide a fuel oil composition in which the sulfur content and the latent sediment amount are reduced.

As a result of intensive studies to solve the above problems, the present inventors have mixed directly desulfurized heavy oil, slurry oil, and at least one of catalytically cracked light oil, and the asphaltene content contained in the fuel oil composition. It was found that maintaining a specific relationship between the content of the fuel oil and the content of the resin and the aromatic content reduces the sulfur content and the potential cement content of the fuel oil composition. The present invention has been completed.

That is, the means for solving the above problems include the following embodiments.
<1> Contains direct desulfurization heavy oil and at least one of slurry oil and catalytic cracking gas oil.
The ratio of the asphaltene content to the sum of the aromatic content and the resin content to the total mass of the composition is 0.090 or less, and the sulfur content is the total mass of the composition. A fuel oil composition which is 0.50% by mass or less based on the amount.
<2> The content of the direct desulfurized heavy oil is 35.0% by volume to 65.0% by volume with respect to the total volume of the composition, and the total content of the slurry oil and the catalytic cracking gas oil is the composition. The fuel oil composition according to <1>, which is 25.0% by volume to 65.0% by volume based on the total volume of the above.
<3> The content of asphaltene with respect to the sum of the content of aromatic content and the content of resin content with respect to the total mass of the composition by mixing direct desulfurized heavy oil and at least one of slurry oil and catalytically decomposed light oil. A fuel oil composition comprising a step of obtaining a fuel oil composition having an amount ratio of 0.090 or less and a sulfur content of 0.50% by mass or less based on the total mass of the composition. Production method.

According to the present invention, it is possible to provide a fuel oil composition in which the sulfur content and the latent sediment amount are reduced.

Hereinafter, embodiments for carrying out the present invention will be described in detail.
In the present specification, "~" indicating a numerical range represents a range including numerical values described as its upper limit and lower limit, respectively. Further, when the unit is described only for the upper limit value in the numerical range represented by "~", it means that the lower limit value is also the same unit.
In the numerical range described stepwise in the present specification, the upper limit value or the lower limit value described in a certain numerical range may be replaced with the upper limit value or the lower limit value of another numerical range described stepwise.
In the present specification, the content or content of each component in the composition refers to the content of each component in the composition when a plurality of substances corresponding to each component are present in the composition, unless otherwise specified. It means the total content or content of substances.
In the present specification, the combination of preferred embodiments is a more preferred embodiment.

In the present specification, the values of the following items mean values obtained by using the following test methods and calculations.
-"Density (15 ° C)";
JIS K 2249-1 (2011) "Crude oil products and petroleum products-Density test method"
・ "Sulfur content";
JIS K 2541-7 (2003) "Crude oil and petroleum products-Sulfur content test method" (fluorescent X-ray method)
-"Dynamic viscosity (50 ° C)";
JIS K 2283 (2000) "Crude oil and petroleum products-Dynamic viscosity test method"
・ "Latent sediment";
ISO 10307-2: 2009 "Petroleum products-Total sediment in resinual fuel oils-"
Thermal aging (Procedure A)
-"Composition" (contents of asphaltene, resin, aromatic and saturated);
The measurement was performed in accordance with JPI-5S-22-83 “Composition analysis of asphalt by column chromatography”.
However, liquid chromatography was used instead of column chromatography for component analysis other than asphaltene. The main operating parameters of liquid chromatography are as follows.

・ "Asphaltene / (resin + aromatic)";
The value obtained by dividing the asphaltene content with respect to the total mass of the fuel composition by the sum of the resin content and the aromatic content.

<< Fuel oil composition >>
The fuel oil composition of the present invention contains at least one of a direct desulfurized heavy oil, a slurry oil and a catalytically decomposed light oil, and asphaltene with respect to the sum of the aromatic content and the resin content with respect to the total mass of the fuel oil composition. The ratio of the content of the components is 0.090 or less, and the content of the sulfur content is 0.50% by mass or less with respect to the total mass of the fuel oil composition.
The fuel oil composition of the present invention maintains a specific relationship between the asphaltene content, the aromatic content and the resin content, thereby maintaining the sulfur content in the fuel oil composition. It is possible to reduce the latent sediment in the fuel oil composition while reducing the amount.
The reason for this is considered as follows.

Generally, it is said that the aggregation and precipitation behavior of asphaltene in fuel oil is influenced by the formation of micellar structure with resin or compatibility with aromatics.
The straight-running residual oil, which is the main base material of conventional heavy fuel oils, has a better relationship between the asphaltene content, the resin content, and the aromatic content, so that the asphaltene itself is in a relatively stable state. It is thought that it is in.
On the other hand, it is known that the direct desulfurized heavy oil obtained by hydrodesulfurizing the residual oil has sulfur, nitrogen, metal and the like removed, while the cyclic compound is decomposed by hydrogenation. .. Therefore, in the composition of direct desulfurized heavy oil, the resin content and aromatic content tend to decrease, the compatibility with asphaltene content, or the saturated aliphatic hydrocarbon having poor mixing stability tends to increase, and the asphaltene content is compared. It is considered to be in an unstable state.

The fuel oil composition of the present invention contains asphaltene with respect to the sum of the contents of aromatic and resin in the fuel oil composition, which contains at least one of direct desulfurized heavy oil, slurry oil and catalytically decomposed light oil. By maintaining the ratio of the content of the components within a certain range, it is possible to suppress the aggregation and destabilization of the asphaltene content, and as a result, it is presumed that the content of the sulfur content and the amount of latent sediment can be reduced. NS.

The properties of the fuel oil composition in the present invention will be described.
However, the properties of the fuel oil composition in the present invention are not limited to the following properties.

(Sulfur content)
The sulfur content of the fuel oil composition is 0.50% by mass or less with respect to the total mass of the composition.
Since the sulfur content is 0.50% by mass or less, it is possible to significantly reduce the amount of SOx emitted when used in diesel engines, industrial furnaces, boilers, etc., compared to conventional general heavy oil. Therefore, it is possible to reduce the load on the environment and suppress flue corrosion and the like.

(composition)
The asphaltene content of the fuel oil composition is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, and 3.0% by mass, based on the total mass of the fuel composition. It is more preferably% or less.

The resin content of the fuel oil composition is preferably 1.0% by mass to 10.0% by mass, preferably 2.0% by mass to 10.0% by mass, based on the total mass of the fuel composition. More preferably, it is more preferably 3.0% by mass to 10.0% by mass.
The resin content is useful for stabilizing asphaltene, and when the content is 10.0% by mass or less, it is not easily affected by aromatic components and has good flammability.

The aromatic content of the fuel oil composition is preferably 10.0% by mass to 50.0% by mass, and 20.0% by mass to 50.0% by mass, based on the total mass of the fuel oil composition. More preferably.
The aromatic component is an important component for compatibility with asphaltene, and when the content is 50.0% or less, the flammability is good.

From the viewpoint of improving the compatibility of the saturated content with asphaltene and the mixing stability, the saturated content of the fuel oil composition shall be 85.0% by mass or less with respect to the total mass of the fuel oil composition. Is preferable, and 80.0% by mass or less is more preferable.

The fuel composition has an asphaltene content (unit: mass) with respect to the sum of the aromatic content (unit: mass%) and the resin content (unit: mass%) with respect to the total mass of the fuel oil composition. %) Ratio (hereinafter, may be referred to as "asphaltene content / (resin content + aromatic content)") is 0.090 or less.
When the asphaltene content / (resin content + aromatic content) is 0.090 or less, the asphaltene content contained in the composition is appropriately dissolved with the aromatic component and forms a micelle structure with the resin content. As a result, the asphaltene content contained in the fuel oil composition can be further improved, and the amount of latent sediment in the fuel oil composition can be reduced. ..

(Latent sediment)
The amount of latent sediment is an index for predicting the formation of sediment during storage of the fuel composition, and is preferably less, but is preferably 0.50% by mass or less based on the total mass of the fuel composition, and is 0. It is more preferably .30% by mass or less, and further preferably 0.10% by mass or less.

(Density and kinematic viscosity)
The density and kinematic viscosity (50 ° C.) of the fuel oil composition are not particularly limited, but can be appropriately prepared depending on the properties of the base material used in the present invention or the use of the fuel oil composition. Preferably the density is ^{0.90g / cm 3 ~1.00g / cm 3} , also it is preferable for the kinematic viscosity (50 ° C.) is 5.000mm ² /s~500.0mm ² / s.

Hereinafter, details of each base material constituting the fuel oil composition of the present invention will be described.
<Direct desulfurization heavy oil>
The fuel oil composition of the present invention directly contains at least desulfurized heavy oil.
The direct desulfurized heavy oil has a lower sulfur content than the vacuum distillation residual oil used as the main base material of the fuel oil composition equivalent to the conventional C heavy oil. Therefore, since the fuel oil composition directly contains desulfurized heavy oil, the content of sulfur in the composition can be further suppressed, and it is easy to adjust the viscosity to be suitable for the fuel oil composition.

Direct desulfurized heavy oil is a heavy fraction obtained by hydrodesulfurizing atmospheric distillation residual oil, vacuum distillation residual oil, or a mixture thereof.
The direct desulfurization apparatus used for hydrodesulfurization is not particularly limited, and known apparatus can be applied.

The sulfur content of the direct desulfurized heavy oil is preferably 0.20 mass% to 1.00 mass%, more preferably 0.20 mass% to 0.80 mass% with respect to the total mass of the direct desulfurized heavy oil. %, More preferably 0.20% by mass to 0.60% by mass.
It is preferable that the sulfur content of the direct desulfurization heavy oil is smaller, but it leads to an increase in cost due to restrictions on the desulfurization raw material oil and harsh treatment conditions. Further, when the sulfur content is 1.00% by mass or less, the sulfur content of the fuel oil composition can be easily adjusted.

Density at 15 ℃ direct desulfurization fuel oil ^is preferably ^{0.86g / cm 3 ~0.96g / cm 3} , more preferably ^{0.86g / cm 3 ~0.95g / cm 3} , 0 It is more preferably .87 g / cm ^{3 to} 0.95 g / cm ^3.
A fuel oil composition prepared by using direct desulfurized heavy oil having a density at 15 ° C. within the above range can increase the calorific value per capacity and suppress the occurrence of combustion failure. It is possible.

In direct desulfurization fuel oil, the kinematic viscosity at 50 ° ^C., is preferably 45.00mm ² /s~400.0mm 2 / ^s, more preferably 50.00mm ² /s~390.0mm 2 / s , more preferably 50.00mm ² /s~380.0mm ² / s.
50 fuel oil composition prepared by using the direct desulfurization of heavy oil kinematic viscosity in the range of 45.00mm ² /s~400.0mm ² / s at ℃ is good atomized state when used in an internal combustion engine Therefore, non-uniformity of combustion and misfire can be suppressed, and the fuel oil composition can be stably supplied to the engine.

The amount of latent sedimentation in the direct desulfurized heavy oil is preferably 2.00% by mass or less, more preferably 1.70% by mass or less, and more preferably 1.50% by mass or less, based on the total mass of the directly desulfurized heavy oil. Is even more preferable.
A fuel oil composition prepared using direct desulfurized heavy oil having a latent sediment amount of 2.00% by mass or less can further suppress the generation of sediments during storage.

By using direct desulfurized heavy oil having a composition within the following range, it is possible to suppress the formation of sediments in the fuel composition.

(composition)
The content of asphaltene in the direct desulfurized heavy oil is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, and 3.5% by mass, based on the total mass of the directly desulfurized heavy oil. It is more preferably% or less.

The content of the resin content in the direct desulfurized heavy oil is preferably 1.0% by mass to 10.0% by mass, preferably 1.0% by mass to 8.0% by mass, based on the total mass of the direct desulfurized heavy oil. More preferably.

The content of the aromatic content in the direct desulfurized heavy oil is preferably 10.0% by mass to 40.0% by mass, and 10.0% by mass to 35.0% by mass, based on the total mass of the direct desulfurized heavy oil. Is more preferable.

The content of the saturated content in the direct desulfurized heavy oil is preferably 80.0% by mass or less, more preferably 75.0% by mass or less, based on the total mass of the directly desulfurized heavy oil.

The content of the direct desulfurized heavy oil in the fuel oil composition is preferably 35.0% by volume to 65.0% by volume, preferably 35.0% by volume to 60.0% by volume, based on the total volume of the composition. Is more preferable, and 40.0% by volume to 60.0% by volume is further preferable.
A fuel oil composition prepared with a direct desulfurized heavy oil content in the range of 35.0% by volume to 65.0% by volume can further suppress the occurrence of sedimentation during storage, and the fuel oil composition. Since the sulfur content in the fuel can be kept lower, the amount of sulfur oxides (SOx) in the combustion gas can also be reduced, so it is possible to reduce the environmental load and suppress flue corrosion. Is.

<Slurry oil>
The fuel oil composition of the present invention contains at least one of a slurry oil and a cracked gas oil.
The slurry oil is a residual oil obtained from a fluid cracking cracker or a residual oil cracking cracker, and generally has a boiling point range equal to or higher than a light oil equivalent fraction.
The flow contact cracking device or the residual oil flow contact cracking device is not particularly limited, and a known device can be used.

The sulfur content in the slurry oil is preferably 0.1% by mass to 1.3% by mass, more preferably 0.1% by mass to 1.2% by mass, based on the total mass of the slurry oil. %.
When the sulfur content is in the range of 0.1% by mass to 1.3% by mass, it is suitable for adjusting the sulfur content of the fuel oil composition to 0.5% by mass.

The composition of the slurry oil is preferably within the range shown below in order to suppress the formation of sediments in the fuel oil composition to be prepared.

(composition)
The content of asphaltene in the slurry oil is preferably 4.0% by mass or less, more preferably 3.5% by mass or less, and 3.0% by mass or less, based on the total mass of the slurry oil. Is more preferable.

The content of the resin content in the slurry oil is preferably 1.0% by mass to 10.0% by mass, preferably 1.0% by mass to 8.0% by mass, based on the total mass of the slurry oil. Is more preferable.

The content of the aromatic component in the slurry oil is preferably 10.0% by mass to 70.0% by mass, preferably 10.0% by mass to 60.0% by mass, based on the total mass of the slurry oil. It is more preferable, and more preferably 10% by mass to 50.0% by mass.

The content of the saturated content in the slurry oil is preferably 80.0% by mass or less, more preferably 75.0% by mass or less, based on the total mass of the slurry oil.

The latent sediment in the slurry oil is preferably 0.50% by mass or less, more preferably 0.30% by mass or less, and further preferably 0.10% by mass or less with respect to the total mass of the slurry oil. preferable.
When the latent sediment in the slurry oil is 0.50% by mass or less, the occurrence of sediment in the fuel oil composition can be further suppressed.

The density and kinematic viscosity of the slurry oil are not particularly limited as long as they satisfy the above-mentioned properties as the slurry oil, but the density is 0.94 g / cm ³ to even considering the fluctuation due to the distillation cut of the slurry oil. was 1.20 g / cm ^3, the kinematic viscosity at 50 ° ^C., it is common in the range of 20.00mm ² /s~700.0mm 2 / s.

The content of the slurry oil in the fuel oil composition is preferably 10.0% by volume to 65.0% by volume, preferably 15.0% by volume to 65.0% by volume, based on the total volume of the composition. It is more preferably 15.0% by volume to 60.0% by volume.
When the content of the slurry oil is in the range of 10.0% by volume to 65.0% by volume, the sulfur content and the latent sediment amount in the fuel oil composition can be further reduced.

<Cracking light oil>
The fuel oil composition contains at least one of a slurry oil and a cracked gas oil.
The catalytic cracking light oil is a fraction equivalent to light oil obtained from a fluid cracking apparatus or a residual oil fluid cracking apparatus, and contains a large amount of aromatic components.
The flow contact cracking device or the residual oil flow contact cracking device is not particularly limited, and a known device can be used.

The content of sulfur in the catalytically cracked gas oil is preferably 0.05% by mass to 1.20% by mass, more preferably 0.05% by mass to 1.20% by mass, based on the total mass of the catalytically cracked gas oil. It is 10% by mass.
When the sulfur content is in the range of 0.05% by mass to 1.20% by mass, it is suitable for adjusting the sulfur content of the fuel oil composition to 0.5% by mass.

The density and kinematic viscosity of the catalytically cracked gas oil are not particularly limited as long as they are within the range of the sulfur content. The density of catalytic cracking gas oil having a boiling range of gas oil fraction equivalent ^is in the range of ^{0.85g / cm 3 ~0.97g / cm 3} , 50 ℃ kinematic viscosity 1.100mm ² /s~4.000mm It is generally in the range of ^{2 / s.}

The content of catalytically cracked gas oil in the fuel oil composition is preferably 10.0% by volume to 65.0% by volume, preferably 15.0% by volume to 65.0% by volume, based on the total volume of the composition. Is more preferable, and 20.0% by volume to 60.0% by volume is further preferable.
When the content of the catalytically cracked gas oil is in the range of 10.0% by volume to 65.0% by volume, the sulfur content and the latent sediment amount in the fuel oil composition can be further reduced.

When the fuel oil composition contains both slurry oil and catalytically cracked gas oil, the total content of the slurry oil and catalytically cracked gas oil is 25.0% by volume to 65.0% by volume based on the total volume of the composition. It is preferably 30.0% by volume to 65.0% by volume, more preferably 35.0% by volume to 60.0% by volume.
When the total content of the slurry oil and the catalytically cracked gas oil is in the range of 25.0% by volume to 65.0% by volume, the sulfur content and the latent sediment amount in the fuel oil composition can be further reduced. can.

The fuel oil composition may further contain a base material other than direct desulfurized heavy oil, slurry oil, and catalytic cracking gas oil (hereinafter, also referred to as “other base materials”).
Other base materials are not particularly limited, and are, for example, straight-run gas oil (LGO), vacuum gas oil (VGO), direct desulfurization gas oil, direct desulfurization heavy oil, hydrodesulfurization gas oil, indirect desulfurization gas oil, thermal decomposition. Examples thereof include light oil, heavy catalytic decomposition light oil, hydrodesulfurized reduced pressure light oil, and cutback residual oil.
Other base materials may be used alone or in combination of two or more.

As used herein, the term "cutback residual oil" refers to a residual oil that has been cut back by blending a light substrate with the residual oil obtained from a vacuum distillation apparatus.
In the present specification, "cutback" means that a light base material such as a light oil distillate or indirect desulfurized light oil is mixed with residual oil to adjust the viscosity, sulfur content, etc. according to the purpose of the C heavy oil base material. means.
The light base material used for cutback is not particularly limited, and is, for example, catalytically decomposed gas oil, direct distilling gas oil (LGO), vacuum gas oil (VGO), direct desulfurization gas oil, hydrodesulfurization gas oil, indirect desulfurization gas oil, and heat decomposition gas oil. , Heavy contact decomposition light oil, desulfurization reduced pressure light oil and the like.

When the fuel oil composition contains other base materials, the content of the other base materials is preferably 1.0% by volume to 10.0% by volume based on the total volume of the composition. It is more preferably 0% by volume to 8.0% by volume, and even more preferably 1.0% by volume to 7.0% by volume.
When the content of the other base material is in the range of 1.0% by volume to 10.0% by volume, it is possible to further suppress the occurrence of sediment in the fuel oil composition.

Various additives can be appropriately added to the fuel oil composition, if necessary.
Examples of the additive include known fuel additives such as a fluidity improver, a pour point lowering agent, an antioxidant, a sludge dispersant, an emulsion inhibitor, a combustion accelerator, and a corrosion inhibitor.
The additive may be used alone or in combination of two or more.

[Manufacturing method of fuel oil composition]
The method for producing a fuel oil composition includes a step of directly mixing desulfurized heavy oil with at least one of a slurry oil and a catalytically decomposed light oil to obtain the fuel oil composition.
By mixing the direct desulfurized heavy oil and at least one of the slurry oil and the catalytically cracked gas oil, a fuel oil composition having a reduced sulfur content and latent sediment content can be obtained.

The method and mixing conditions for mixing the direct desulfurized heavy oil and at least one of the slurry oil and the catalytically cracked gas oil are asphaltene content / (resin content + aromatic content) of 0.090 or less and a sulfur content. Is not particularly limited as long as it can be prepared in an amount of 0.50% by mass or less based on the total mass of the composition.

The above steps may further include other substrates.
The mixing order of at least one of the direct desulfurized heavy oil, the slurry oil and the catalytically cracked light oil, and the other base material is not particularly limited, and the direct desulfurized heavy oil may be sequentially mixed.

Since the fuel oil composition maintains a specific relationship between the asphaltene content, the aromatic content and the resin content, the potential sediment amount in the fuel oil composition should be reduced. Moreover, since the sulfur content is 0.50% by mass or less with respect to the total mass of the composition, it is particularly suitable as a fuel for ships.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

(Examples 1 to 8 and Comparative Examples 1 to 6)
The fuel oil compositions of Examples 1 to 8 and Comparative Examples 1 to 6 are blended in the proportions shown in Tables 3 and 4 using the base materials 1 to 7 having the properties shown in Table 2. The thing was prepared.
The properties of each of the obtained fuel oil compositions are shown in Tables 3 and 4.

It is preferable that the amount of latent sediment is small, and when the amount of latent sediment is 0.70% by mass or less, it is judged that the amount of latent sediment is reduced.

The abbreviations in Tables 2 to 4 are as follows. In Table 2, "-" means that the boiling point range of the base material is outside the applicable range of JPI-5S-22-83 "Composition analysis of asphalt by column chromatography".
・ Base material 1; Direct desulfurization heavy oil ・ Base material 2; Slurry oil ・ Base material 3; Contact decomposition light oil ・ Base material 4; Cutback residual oil ・ Base material 5; Direct desulfurization light oil ・ Base material 6; Indirect desulfurization reduced pressure light oil・ Base material 7; Direct desulfurization heavy oil

As shown in Tables 3 and 4, it contains a direct desulfurized heavy oil and at least one of a slurry oil and a catalytically decomposed light oil, and is the sum of the aromatic content and the resin content with respect to the total mass of the composition. The ratio of the asphaltene content to the asphaltene content (asphaltene content / (resin content + aromatic content)) is 0.090 or less, and the sulfur content is 0.50 mass with respect to the total mass of the composition. The amount of latent sediment was reduced in the fuel oil compositions of Examples 1 to 8 which were less than or equal to%.
On the other hand, the fuel oil compositions of Comparative Example 1 and Comparative Examples 4 to 6 which do not contain at least one of slurry oil and catalytically cracked gas oil have a latent sediment amount as compared with Examples 1 to 8. Many were inferior in reducing the amount of latent sediment.
Further, Comparative Example 2 and Comparative Example 3 in which a direct desulfurized heavy oil and at least one of a slurry oil and a catalytic cracking gas oil are contained, but the ratio of asphaltene content / (resin content + aromatic content) exceeds 0.090. Then, the amount of latent sediment is larger than that of Examples 1 to 8.

From the above, the fuel oil composition of the present invention has a reduced sulfur content and latent sediment content, so that it can reduce the environmental load and is excellent in storage stability. Therefore, it is particularly suitable as a fuel oil for ships. It can be preferably used.

Claims (3)

It contains direct desulfurization heavy oil and at least one of slurry oil and catalytic cracking gas oil.
The ratio of the asphaltene content to the sum of the aromatic content and the resin content to the total mass of the composition is 0.090 or less, and the sulfur content is the total mass of the composition. der 0.50 mass% or less with respect to is,
A fuel oil composition in which the content of the direct desulfurized heavy oil in the fuel oil composition is 35.0% by volume to 40.0% by volume based on the total volume of the composition. The total content of the previous SL slurry oil and catalytic cracking gas oil is 25.0 volume% ～65.0 volume% of the total volume of the composition, the fuel oil composition of claim 1. The ratio of the asphaltene content to the sum of the aromatic content and the resin content with respect to the total mass of the composition by mixing the direct desulfurized heavy oil and at least one of the slurry oil and the catalytically decomposed gas oil. There is a 0.090 or less, and state, and are 0.50 wt% or less based on the total weight of the sulfur content is composition,
A fuel oil composition comprising a step of obtaining a fuel oil composition, wherein the content of the direct desulfurized heavy oil in the fuel oil composition is 35.0% by volume to 40.0% by volume based on the total volume of the composition. Production method.