JP7296211B2 - Heavy oil composition and method for producing heavy oil composition - Google Patents

Description

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

Conventionally, heavy oil compositions have been used for various purposes in various industrial fields. It is classified into three types.
Among these heavy oil compositions, A heavy oil is generally used as a fuel oil for heaters for greenhouse warming cultivation and building heaters, and B heavy oil and C heavy oil are generally used as fuel oil for large diesel engines for ships. It is also used as fuel oil for large-scale boilers such as factories, power plants, and district heating and cooling systems.

As described above, C heavy oil and A heavy oil have different viscosities, and therefore the blending of base materials is also different. In other words, A heavy oil is made by blending a small percentage of residual oil with light oil fraction, whereas C heavy oil is made by blending a slight percentage of light oil fraction with residual oil. and its viscosity is higher than that of A heavy oil.

In recent years, from the viewpoint of reducing the environmental load and suppressing flue corrosion, studies have been made on reducing the sulfur content of residual oils used as heavy oil base stocks, and heavy oil compositions using such low sulfur base stocks have been developed. It is required.
In particular, regarding heavy oil compositions equivalent to C heavy oil used as marine fuel oil, the sulfur content is gradually regulated by the international treaty (MARPOL Convention) established by the IMO (International Maritime Organization). It is required to reduce the content to 0.50% by mass or less.

In addition, a heavy oil composition equivalent to C heavy oil, that is, a heavy oil composition used in internal combustion engines, is required to have excellent ignitability and combustibility.
CCAI (Calculated Carbon Aromaticity Index), which is calculated from the density of the heavy oil composition at 15° C. and the kinematic viscosity at 50° C., is known as an index of the ignitability of a heavy oil composition equivalent to C heavy oil. , the higher the CCAI, the lower the ignitability.

On the other hand, the social situation in recent years is represented by the enactment of the Energy Supply Structure Advancement Act (official name: "Act on Promotion of Use of Non-Fossil Energy Sources by Energy Suppliers and Effective Use of Fossil Energy Raw Materials"). Thus, effective utilization of petroleum resources has been attracting attention, and from this point of view, effective utilization of heavy base materials has been desired.

As such a heavy oil composition, the present applicant proposes a fuel oil composition obtained by blending a light oil fraction or the like with a slurry oil, which is a residual oil obtained from a fluidized catalytic cracking unit or a residual oil fluidized catalytic cracking unit. (See Patent Document 1 (Japanese Patent Application Laid-Open No. 2018-165367)).

JP 2018-165367 A

According to the fuel oil composition described in Patent Document 1, the sulfur content and latent sediments are reduced while the heavy slurry oil is contained in a relatively high proportion, while the sulfur content and latent sediments are reduced, and the ignitability is improved. A fuel oil composition equivalent to an excellent heavy oil composition can be provided.

However, since the fuel oil composition described in Patent Document 1 contains a high proportion of slurry oil with relatively low kinematic viscosity, the kinematic viscosity of the fuel oil composition is also low, and the use of high kinematic viscosity fuel oil is assumed. It is assumed that it may be difficult to apply to large marine diesel engines and large-scale boilers designed as

In addition, as described above, a heavy oil composition equivalent to C heavy oil is required to have excellent ignitability and hardly generate sediment. The directly desulfurized heavy oil causes sedimentation due to the heat received in the desulfurization process, etc., and therefore it is necessary to suppress the generation thereof.

The present invention reduces the sulfur content to 0.50% by mass or less even when a large amount of directly desulfurized heavy oil is contained, suppresses the occurrence of sediment even in the high kinematic viscosity region, and keeps CCAI within the desired range. It is an object of the present invention to provide a novel heavy oil composition that can be easily controlled and a method for producing such a heavy oil composition.

As described above, when directly desulfurized heavy oil is blended as a base material, sedimentation is likely to occur. By blending the base material (base material A) and the light oil fraction at a constant ratio, the sulfur content is effectively reduced, and even in the high kinematic viscosity region, while suppressing the occurrence of sediment, The inventors have found that CCAI can be easily controlled within a desired range, and have completed the present invention.

That is, the present invention
(1) A base material containing 35% by volume or more and less than 65% by volume of directly desulfurized heavy oil having a latent sediment of 0.40% by mass or less, excluding direct desulfurized heavy oil, having a CCAI of 850 or more and a density of 0.9600 g at 15 ° C. 1% to 25% by volume of the base material A having a density of 1/cm 3 or ^more , and 10% to 64% by volume of a light oil fraction having a density of 0.8200 g/cm ³ to 0.9350 g/cm ³ at 15°C,
a sulfur content of 0.50% by mass or less,
a kinematic viscosity at 50° C. of greater than 80.0 mm ² /sec;
CCAI is 870 or less,
Latent sediment is 0.10% by mass or less
A heavy oil composition characterized by
(2) The heavy oil composition according to (1) above, which has a kinematic viscosity at 50°C of more than 80.0 mm ² /sec and 180.0 mm ² /sec or less,
(3) A method for producing a heavy oil composition, comprising:
Directly desulfurized heavy oil with a latent sediment of 0.40% by mass or less is 35% by volume or more and less than 65% by volume, the base material excludes directly desulfurized heavy oil, the CCAI is 850 or more, and the density at 15 ° C. is 0.9600 g / cm ³ Mixing so that the above base material A is 1% by volume to 25% by volume, and the light oil fraction having a density of 0.8200 g/cm ³ to 0.9350 g/cm ³ at 15° C. is 10% to 64% by volume. do,
a sulfur content of 0.50% by mass or less,
a kinematic viscosity at 50° C. of greater than 80.0 mm ² /sec;
CCAI is 870 or less,
Latent sediment is 0.10% by mass or less
A method for producing a heavy oil composition, characterized by obtaining a heavy oil composition that is
(4) The method for producing a heavy oil composition according to (3) above, wherein the resulting heavy oil composition has a kinematic viscosity at 50°C of more than 80.0 mm ² /sec and less than or equal to 180 mm ² /sec.

According to the present invention, even when a large amount of directly desulfurized heavy oil is contained, the sulfur content is reduced to 0.50% by mass or less, suppressing the generation of sediment even in the high kinematic viscosity region, while reducing CCAI. It is possible to provide a novel heavy oil composition that can be easily controlled within a desired range, and to provide a method for producing such a heavy oil composition.

DETAILED DESCRIPTION OF THE INVENTION Embodiments for carrying out the present invention will be described in detail below.
In this specification, "-" representing a numerical range represents a range including the numerical values described as the upper limit and the lower limit. In addition, when only the upper limit value in the numerical range represented by "-" is described in units, it means that the lower limit value is also in the same unit.
In the numerical ranges described stepwise in this specification, the upper limit or lower limit described in a certain numerical range may be replaced with the upper limit or lower limit of another numerical range described stepwise.
In the present specification, the content rate or content of each component in the composition refers to, when there are multiple types of substances corresponding to each component in the composition, the multiple types of substances present in the composition unless otherwise specified. means the total content or content of a substance.
Combinations of preferred aspects are more preferred aspects herein.

In this specification, unless otherwise specified, the values of the following items mean the values obtained using the following test methods and calculations.
- "Density at 15°C";
JIS K 2249-1 (2011) "Crude oil 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)
・ "Kinematic viscosity at 50 ° C.";
JIS K 2283 (2000) "Crude oil and petroleum products-Kinematic viscosity test method"
- "CCAI";
It means the value obtained by the calculation method shown in the following formula (α).
CCAI = D - 140.7 log ₁₀ log ₁₀ (V + 0.85) - 80.6 (α)
In the formula (α), D is the density (kg/m ³ ) at 15°C, and V is the kinematic viscosity (mm ² /s) at 50°C.
- "latent segmentation";
ISO 10307-2:2009 "Petroleum products - Total sediment in residual fuel oils -"
It means a value measured by Thermal aging (Procedure A).

First, the heavy oil composition of the present invention will be described.
The heavy oil composition of the present invention contains 35% by volume or more and less than 65% by volume of directly desulfurized heavy oil having a latent sediment of 0.40% by mass or less, and is a base material excluding direct desulfurized heavy oil, and has a CCAI of 850 or more at 15 ° C. Base material A having a density of 0.9600 g/cm ³ or more is 1% to 25% by volume, and a light oil fraction having a density at 15° C. of 0.8200 g/cm ³ to 0.9350 g/cm ³ is 10% by volume to It contains 64% by volume, has a sulfur content of 0.50% by mass or less, a kinematic viscosity at 50° C. of more than 80.0 mm ² /sec, a CCAI of 870 or less, and a latent sediment of 0.10% by mass or less. and

The heavy oil composition of the present invention contains 35% by volume or more and less than 65% by volume of directly desulfurized heavy oil having a latent sediment of 0.40% by mass or less.

Directly desulfurized heavy oils are heavy fractions obtained by hydrodesulfurizing atmospheric bottoms, vacuum bottoms or mixtures thereof.
The direct desulfurization equipment used for hydrodesulfurization is not particularly limited, and known equipment can be applied.

Direct desulfurized heavy oil is more likely to generate sediment due to the heat received in the desulfurization process, etc., compared to vacuum distillation residue oil, which has been conventionally used as a heavy base material constituting a heavy oil composition, and such sediment causes poor combustion. may occur.
However, according to the heavy oil composition of the present invention, the occurrence of sediments is suitably suppressed by blending the base material A and the gas oil fraction, each of which has specific properties, in a specific ratio with the direct desulfurized heavy oil having specific properties. can do.

In addition, direct desulfurized heavy oil has a lower sulfur content than vacuum distillation residue oil used as the main base material of conventional heavy oil compositions. It is possible to reduce the sulfur content in the composition and easily adjust the kinematic viscosity suitable for the heavy oil composition.

The directly desulfurized heavy oil preferably has a sulfur content of 0.55% by mass or less, more preferably 0.15% by mass to 0.55% by mass, and more preferably 0.15% by mass to 0.55% by mass. More preferably 50% by mass.
It is preferable that the sulfur content in the directly desulfurized heavy oil is as low as possible, but if an attempt is made to excessively reduce the sulfur content in the directly desulfurized heavy oil, the desulfurized feedstock will be restricted, severe treatment conditions will be required, and the cost will increase. It becomes easier to connect to the up.
By setting the sulfur content in the directly desulfurized heavy oil within the above range, the sulfur content of the heavy oil composition can be easily adjusted.

The directly desulfurized heavy oil preferably has a density at 15° C. of 0.9100 g/cm ³ to 0.9450 g/cm ³ , more preferably 0.9150 g/cm ³ to 0.9400 g/cm ³ , More preferably 0.9200 g/cm ³ to 0.9350 g/cm ³ .
A heavy oil composition prepared using a directly desulfurized heavy oil whose density at 15°C is within the above range can increase the calorific value per unit volume, and easily causes non-uniform combustion and combustion failure. can be suppressed to

The directly desulfurized heavy oil preferably has a kinematic viscosity at 50° C. of 100.0 mm ² /s to 260.0 mm ² /s, more preferably 120.0 mm ² /s to 260.0 ^{mm 2} /s. , 150.0 mm ² /s to ^{260.0 mm 2} /s.
A heavy oil composition prepared using a directly desulfurized heavy oil having a kinematic viscosity at 50°C within the above range has a good spray state when used in an internal combustion engine, so that uneven combustion and misfiring can be suppressed. and the heavy oil composition can be stably supplied to the engine.

The direct desulfurized heavy oil preferably has a CCAI of 830 or less, more preferably 770 to 825, even more preferably 775 to 820.
When the CCAI of the directly desulfurized heavy oil is within the above range, the heavy oil composition prepared using the directly desulfurized heavy oil within the above range can easily exhibit good ignitability.

The direct desulfurized heavy oil has a latent sediment content of 0.40% by mass or less (0.00% by mass to 0.40% by mass), and 0.00% by mass to 0.38% by mass. More preferably, it is 0.00% by mass to 0.36% by mass.
Since the heavy oil composition of the present invention contains a direct desulfurized heavy oil having a latent sediment content of 0.40% by mass or less, the generation of sediment can be easily suppressed.

In the heavy oil composition of the present invention, the content of the direct desulfurized heavy oil is 35% to less than 65% by volume, more preferably 37% to 63% by volume, and 39% to 61% by volume. is more preferred.

The heavy oil composition of the present invention contains predetermined amounts of the base A and the light oil fraction each having specific properties, and contains the direct desulfurized heavy oil having the specific properties in the above range, thereby reducing the sulfur content. , CCAI can be easily controlled within a desired range even in a high kinematic viscosity region while suppressing the occurrence of sediments.

The heavy oil composition of the present invention is a base material other than direct desulfurized heavy oil, and contains 1% to 25% by volume of base material A having a CCAI of 850 or more and a density of 0.9600 g/cm ³ or more at 15°C. .

As the base material A, for example, in addition to catalytic cracking heavy oil, one or more selected from slurry oil, heavy oil fraction such as indirectly desulfurized heavy oil, atmospheric distillation residue, ethylene bottom oil, solvent deasphalting oil, etc. can.
Catalytically cracked heavy oil is a heavy fraction or slurry oil with a boiling point of approximately 230° C. to 600° C. obtained from a fluid catalytic cracking unit or a resid fluid catalytic cracking unit, and generally equal to or higher than the light oil equivalent fraction. It has a boiling point range of
The fluid catalytic cracking unit or residual oil fluid catalytic cracking unit is not particularly limited, and known units can be used.

The base material A preferably has a sulfur content of 0.10% by mass to 1.40% by mass, more preferably 0.10% by mass to 1.30% by mass, and 0.10% by mass. More preferably, it is from mass % to 1.20 mass %.
When the sulfur content of the base material A is within the above range, the sulfur content in the heavy oil composition can be easily adjusted to 0.50% by mass.

Base material A preferably has a density at 15° C. of 0.9600 g/cm ³ or more, more preferably 0.9600 g/cm ³ to 1.200 g/cm ³ , and more preferably 0.9600 g/cm ³ . More preferred is ~1.100 g/cm ³ .
When the density of the base material A at 15° C. is within the above range, the heavy oil composition according to the present invention can efficiently suppress sedimentation and easily suppress deterioration of ignitability.

Base material A preferably has a kinematic viscosity at 50° C. of 10.0 mm ² /s to 300.0 ^{mm 2} /s or less, more preferably 20.0 mm ² /s to 240.0 mm ² /s. More preferably, it is 30.0 mm ² /s to ^{180.0 mm 2} /s.
Since the kinematic viscosity of the base material A at 50 ° C. is within the above range, the heavy oil composition according to the present invention can be stably supplied to industrial furnaces, boilers, etc., and can be used in internal combustion engines. In this case, the atomized state is improved, so non-uniform combustion and misfiring can be easily suppressed.

Substrate A has a CCAI of 850 or more, preferably 850-950, more preferably 855-940.
When the CCAI of the base material A is within the above range, the heavy oil composition according to the present invention contains an appropriate amount of aromatic components and the like, so that latent sediment can be easily suppressed, and ignition It is possible to easily suppress the deterioration of the properties.

Substrate A preferably has a latent sediment of 0.00% by mass to 0.04% by mass, more preferably 0.00% by mass to 0.02% by mass, and 0.00% by mass to 0.01% by mass is more preferred.
When the latent sediment in the base material A is within the above range, the occurrence of sediment in the heavy oil composition can be more easily suppressed.

The content of the base material A in the heavy oil composition of the present invention is 1% to 25% by volume, more preferably 3% to 25% by volume, and 5% to 25% by volume. More preferred.

The heavy oil composition of the present invention contains a predetermined amount of direct desulfurized heavy oil having specific properties, and a predetermined amount of base material A and a gas oil fraction described later, each having specific properties, thereby reducing the sulfur content. CCAI can be easily controlled within a desired range while suppressing the occurrence of sediments even in the high kinematic viscosity range.

The heavy oil composition of the present invention contains 10% to 64% by volume of a light oil fraction having a density of 0.8200 g/cm ³ to 0.9350 g/cm ³ at 15°C.

In the present application documents, the light oil fraction means a substance with a boiling point range of 170 to 500 ° C., which can be usually used as a base material for light oil or A heavy oil, or as a base material for cutting back vacuum distillation residue. One or more selected from catalytically cracked gas oil, straight run gas oil, vacuum gas oil, direct desulfurized light gas oil, direct desulfurized heavy gas oil, hydrodesulfurized gas oil, indirect desulfurized gas oil, thermally cracked gas oil, heavy catalytically cracked gas oil, etc. can.
In addition, in the present application documents, the above-mentioned "cutback" means mixing a light base material with the residual oil for the purpose of reducing kinematic viscosity and sulfur content. , directly desulfurized heavy oil, slurry oil, and cutback residual oil (CBR-H), which is a mixture of vacuum distillation residue and light base stock.

The light oil fraction preferably has a sulfur content of 0.00% by mass to 0.50% by mass, more preferably 0.00% by mass to 0.45% by mass, and 0.00% by mass. More preferably, it is from mass % to 0.40 mass %.
When the sulfur content of the light oil fraction is within the above range, the sulfur content in the heavy oil composition can be easily adjusted to 0.50% by mass.

The light oil fraction has a density of 0.8200 g/cm ³ to 0.9350 g/cm ³ at 15° C., preferably 0.8220 g/cm ³ to 0.9320 g/cm ³ , and preferably 0.8250 g/cm 3 to 0.9320 g/cm 3 . cm ³ to 0.9300 g/cm ³ is more preferable.
When the density of the light oil fraction at 15°C is within the above range, the heavy oil composition according to the present invention can increase the calorific value per unit volume and prevent uneven combustion and combustion failure. can be easily suppressed.
If the density at 15°C is higher than the upper limit of the above range, the resulting heavy oil composition will become more aromatic or heavier, and the combustibility will tend to decrease.

The light oil fraction preferably has a kinematic viscosity at 50° C. of 1.0 mm ² /s to 20.0 ^{mm 2} /s, more preferably 1.0 mm ² /s to 18.0 mm ² /s. , 1.1 mm ² /s to 16.0 ^{mm 2} /s.
Since the kinematic viscosity of the light oil fraction at 50°C is within the above range, the heavy oil composition according to the present invention can easily suppress the deterioration of ignitability due to excessive heavy oil, and easily prevent sedimentation. can be suppressed.

The CCAI of the light oil fraction is preferably 740-900, more preferably 750-890, even more preferably 760-880.
When the CCAI of the light oil fraction is within the above range, the heavy oil composition according to the present invention can easily suppress the deterioration of ignitability due to excessive heavy oil, and can easily suppress the generation of sediment. can.

In the heavy oil composition of the present invention, the content of the light oil fraction is 10% to 64% by volume, preferably 10% to 60% by volume, and 10% to 55% by volume. more preferred.

The heavy oil composition of the present invention contains a predetermined amount of the direct desulfurized heavy oil having the specific properties described above, and also contains predetermined amounts of the base material A and the light oil fraction, each of which has specific properties, thereby reducing the sulfur content. , CCAI can be easily controlled within a desired range even in a high kinematic viscosity region while suppressing the occurrence of sediments.

The heavy oil composition of the present invention may contain various additives as appropriate.
Additives include known fuel additives such as fluidity improvers, pour point depressants, antioxidants, sludge dispersants, emulsion inhibitors, combustion accelerators and corrosion inhibitors.
Additives may be used singly or in combination of two or more.

The heavy oil composition of the present invention has a sulfur content of 0.50% by mass or less (0.00% by mass to 0.50% by mass) and 0.00% by mass to 0.45% by mass. is preferred, and 0.00% by mass to 0.40% by mass is more preferred.

The heavy oil composition of the present invention can easily control the sulfur content to 0.50% by mass or less by containing predetermined amounts of each of the direct desulfurized heavy oil, the base material A, and the light oil fraction, each having specific properties. .

The heavy oil composition of the present invention preferably has a density at 15° C. of 0.8500 g/cm ³ to 0.9700 g/cm ³ , more preferably 0.8550 g/cm ³ to 0.9600 g/cm ³ . More preferably, it is 0.8600 g/cm ³ to 0.9550 g/cm ³ .

The heavy oil composition of the present invention has a kinematic viscosity at 50° C. of more than 80.0 mm ² /sec, preferably more than 80.0 mm ² /sec and 180.0 mm ² /sec or less, and 80.0 mm ² /sec to 170.0 mm ² /sec.

The heavy oil composition of the present invention has a CCAI of 870 or less, preferably 780-860, more preferably 790-850.

The heavy oil composition of the present invention has a latent sediment of 0.10% by mass or less (0.00% by mass to 0.10% by mass), and 0.08% by mass or less (0.00% by mass to 0.08% by mass). %), and more preferably 0.06 mass % or less (0.00 mass % to 0.06 mass %).

The heavy oil composition of the present invention contains a predetermined amount of direct desulfurized heavy oil having specific properties, and also contains predetermined amounts of base A and gas oil fractions, each of which has specific properties. CCAI can be easily controlled within a desired range while reducing the content to 50% by mass or less and suppressing the occurrence of sediments even in the high kinematic viscosity region.

The heavy oil composition of the present invention can be suitably produced by the production method of the present invention, which will be described later.

As the heavy oil composition of the present invention, a C heavy oil composition can be mentioned, and such a C heavy oil composition can be suitably used, for example, as fuel for ships.

According to the present invention, even when a large amount of directly desulfurized heavy oil is contained, the sulfur content is reduced to 0.50% by mass or less, suppressing the generation of sediment even in the high kinematic viscosity region, while reducing CCAI. A novel heavy oil composition that can be easily controlled within a desired range can be provided.

Next, the method for producing the heavy oil composition of the present invention will be described.
The production method of the present invention is a method for producing a heavy oil composition, wherein the direct desulfurized heavy oil having a latent sediment of 0.40% by mass or less is 35% by volume or more and less than 65% by volume, and the base material is excluding the directly desulfurized heavy oil. The base material A having a CCAI of 850 or more and a density of 0.9600 g/cm ³ or more at 15°C is 1% to 25% by volume, and has a density of 0.8200 g/cm ³ to 0.9350 g/cm ³ at 15°C. is mixed so that the light oil fraction is 10% by volume to 64% by volume, the sulfur content is 0.50% by mass or less, the kinematic viscosity at 50 ° C. is more than 80.0 mm ² / sec, and the CCAI is 870 The following is characterized by obtaining a heavy oil composition having a latent sediment of 0.10% by mass or less.

The details of the direct desulfurized heavy oil, the base material A and the gas oil fraction in the method for producing the fuel oil composition of the present invention are as described above.

In the method for producing the heavy oil composition of the present invention, 35% by volume or more and less than 65% by volume of directly desulfurized heavy oil is mixed, preferably 37% to 63% by volume, and 39% to 61% by volume. is more preferred.

In the method for producing a heavy oil composition of the present invention, the mixing ratio of the direct desulfurized heavy oil having the specific properties is set within the above range, and the base material A and the light oil fraction, each having specific properties, are mixed at a predetermined mixing ratio. Thus, the sulfur content can be reduced to 0.50% by mass or less, and CCAI can be easily controlled within a desired range while suppressing sedimentation even in the high kinematic viscosity region.

In the method for producing the heavy oil composition of the present invention, 1% to 25% by volume of the base material A is mixed, preferably 3% to 25% by volume, more preferably 5% to 25% by volume. more preferred.

In the method for producing the heavy oil composition of the present invention, 10% to 64% by volume of the light oil fraction is mixed, preferably 10% to 60% by volume, more preferably 10% to 55% by volume. more preferred.

In the method for producing a heavy oil composition of the present invention, the direct desulfurized heavy oil, base A and light oil fraction are mixed by any method so as to obtain desired properties, thereby easily preparing the intended heavy oil composition. can do.

In the method for producing a heavy oil composition of the present invention, a predetermined amount of direct desulfurized heavy oil having specific properties is mixed, and a heavy oil composition obtained by mixing predetermined amounts of base A and a light oil fraction each having specific properties. It is possible to easily control CCAI within a desired range while reducing the content of sulfur in a product and suppressing the occurrence of sediments even in a high kinematic viscosity region.

The details of the heavy oil composition obtained by the production method of the present invention are as described above.
As the heavy oil composition obtained by the production method of the present invention, C heavy oil composition can be mentioned in particular, and such C heavy oil composition can be suitably used, for example, as marine fuel.

According to the present invention, even when a large amount of directly desulfurized heavy oil is contained, the sulfur content is reduced to 0.50% by mass or less, suppressing the generation of sediment even in the high kinematic viscosity region, while reducing CCAI. It is possible to provide a novel method for producing a heavy oil composition that can be easily controlled within a desired range.

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

(Examples 1 and 2, Comparative Example 1 and Reference Example 1)
Using directly desulfurized heavy oil, catalytically cracked heavy oil, indirectly desulfurized light oil, and directly desulfurized heavy light oil having the properties shown in Table 1, and blending them in the proportions shown in Table 2, Examples 1 and 2, Comparative C heavy oil compositions according to Example 1 and Reference Example 1 were prepared.
The above catalytically cracked heavy oil is a base material corresponding to base material A (fulfilling the requirements for base material A), and indirect desulfurized light oil and directly desulfurized heavy light oil correspond to light oil fractions (meeting the requirements for light oil fractions). It is the base material.
The properties (sulfur content, density at 15°C, kinematic viscosity at 50°C, CCAI, latent sediments) of each of the obtained heavy oil compositions were measured. Table 2 shows the results.

From Table 2, it can be seen that the heavy oil compositions of the present invention obtained in Examples 1 and 2 have specific properties obtained by blending direct desulfurized heavy oil, catalytically cracked heavy oil, and light oil fraction, each having specific properties, in a specific ratio. Therefore, even though it contains a large amount of heavy base materials such as direct desulfurized heavy oil and catalytically cracked heavy oil, the sulfur content is reduced to 0.50% by mass or less, It can be seen that even in the high kinematic viscosity region, the occurrence of sediments is suppressed and the CCAI can be easily controlled within the desired range, and the ignitability is excellent.
In particular, as is clear from the comparison with the heavy oil composition obtained in Reference Example 1, the heavy oil compositions obtained in Examples 1 and 2 have the same CCAI and an appropriate kinematic viscosity. It turns out that it can be controlled.

On the other hand, the comparative heavy oil composition of the present invention obtained in Comparative Example 1 has a large amount of latent sediments because the blending ratio of the direct desulfurized heavy oil is outside the predetermined range.

According to the present invention, even when a large amount of directly desulfurized heavy oil is contained, the sulfur content is reduced to 0.50% by mass or less, suppressing the generation of sediment even in the high kinematic viscosity region, while reducing CCAI. It is possible to provide a novel heavy oil composition that can be easily controlled within a desired range, and to provide a method for producing such a heavy oil composition.

Claims (4)

Directly desulfurized heavy oil with a latent sediment of 0.40% by mass or less is 35% by volume or more and less than 65% by volume, CCAI is 850 or more, and catalytically cracked heavy oil with a density of 0.9600 g/cm ³ or more at 15 ° C is 16% to 25% by volume. 20% to 28% by volume of at least one selected from indirectly desulfurized light oil and directly desulfurized heavy oil having a density of 0.8739 g/cm ³ to 0.8898 g/cm ³ at 15°C,
a sulfur content of 0.50% by mass or less,
a kinematic viscosity at 50° C. of greater than 80.0 mm ² /sec;
CCAI is 870 or less,
A heavy oil composition having a latent sediment of 0.10% by mass or less. The heavy oil composition according to claim 1, which has a kinematic viscosity at 50°C of more than 80.0 mm ² /sec and 180.0 mm ² /sec or less. A method for producing a heavy oil composition, comprising:
Direct desulfurized heavy oil with a latent sediment of 0.40% by mass or less is 35% by volume or more and less than 65% by volume, CCAI is 850 or more, and catalytically cracked heavy oil with a density of 0.9600 g / cm ³ or more at 15 ° C. is 16% to 25% by volume. At least one selected from indirectly desulfurized light oil and directly desulfurized heavy light oil having a density of 0.8739 g/cm ³ to 0.8898 g/cm ³ at 15° C. is 20% to 28% by volume. mixed with
a sulfur content of 0.50% by mass or less,
a kinematic viscosity at 50° C. of greater than 80.0 mm ² /sec;
CCAI is 870 or less,
A method for producing a heavy oil composition, characterized by obtaining a heavy oil composition having a latent sediment of 0.10% by mass or less. The method for producing a heavy oil composition according to claim 3, wherein the resulting heavy oil composition has a kinematic viscosity at 50°C of more than 80.0 mm ² /sec and not more than 180.0 mm ² /sec.