JP2020132796A - Heavy oil composition and method for producing heavy oil composition - Google Patents

Abstract

To provide a novel heavy oil composition, in which, even when a certain amount of heavy base material is contained, the content ratio of sulfur content can be reduced to 0.50 mass% or less, and the content ratio of nitrogen content can be reduced, the occurrence of sediment can be suppressed, and CCAI can easily be controlled to a desired range with low dynamic viscosity.SOLUTION: Provided is a heavy oil composition characterized in that it contains: a direct desulfurization heavy oil having a sulfur content of 0.50 mass% or less and an actual existent sediment of 1 mass% or less by 10 vol.% or more and less than 35 vol.%; a base material A, which is a base material excluding the direct desulfurization heavy oil, having a CCAI of 890 to 940, a sulfur content of 0.2 to 1.2 mass%, and a density of 0.990 to 1.055 g/cmby 10 vol.% to 25 vol.%; and a light oil fraction having a density of 0.83 to 0.93 g/cmand a CCAI of 840 or less by 40 to 80 vol.%, and in which the contained amount of sulfur content is 0.5 mass% or less, the dynamic viscosity is 4 to 80 mm/sec, the CCAI is 860 or less, and the actual existent sediment is 0.20 mass% or less.SELECTED DRAWING: None

Description

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

Conventionally, heavy oil compositions have been used for various purposes in various industrial fields, and in JIS K2205, depending on the kinematic viscosity, one type (A heavy oil), two types (B heavy oil) and three types (C heavy oil) It is classified into three types.
Of these heavy oil compositions, heavy oil A is generally used as fuel oil for heating heaters for house heating cultivation and heating machines for buildings, etc., and heavy oil B and C are generally fuel oils 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.

Of these, C heavy oil has a higher viscosity than other heavy oils, so the base material composition is also different from other heavy oils, and usually a small proportion of light oil fraction is added to the vacuum residue oil. It has become.

In recent years, from the viewpoint of reducing the environmental load and suppressing flue corrosion, reduction of sulfur in residual oil, which is a heavy oil base material, has been studied, and heavy oil compositions using such a low sulfur base material have been studied. It has come to be required.
In particular, for heavy oil compositions equivalent to heavy fuel oil C used as fuel oil for ships, the sulfur content is gradually regulated by the international treaty (MARPOL Convention) established by the IMO (International Maritime Organization). It is required to reduce to .50% by mass or less.

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

On the other hand, as a social situation in recent years, it is represented by the enactment of the Energy Supply Structure Advancement Law (official name: "Act on Promotion of Utilization of Non-fossil Energy Sources and Effective Utilization of Fossil Energy Raw Materials by Energy Supply Providers"). As described above, the effective utilization of petroleum resources has been attracting attention, and from this viewpoint, a heavy oil composition utilizing a certain amount of a heavy base material has been desired.
As such a heavy oil composition, the 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 fluid cracking cracker or a residual oil fluid cracking cracker. (Refer to Patent Document 1 (Japanese Unexamined Patent Publication No. 2018-165367)).

Japanese Unexamined Patent Publication No. 2018-165367

According to the fuel oil composition described in Patent Document 1, a fuel oil composition equivalent to a heavy oil composition having a reduced sulfur content and excellent ignitability is provided while effectively utilizing heavy slurry oil. can do.

However, it is generally known that the vacuum distillation residual oil constituting C heavy oil is a base material having a very high sulfur content, and the above slurry oil also has a relatively high sulfur content. It is assumed that the demand for reduction of the sulfur content in the heavy oil composition, which is expected to increase more and more, cannot be met.
Further, from the viewpoint of reducing the environmental load, a heavy oil composition in which the content ratio of nitrogen content is reduced together with sulfur content is required, but heavy base materials such as the vacuum distillation residual oil generally contain nitrogen content. It is known to be a base material with a high proportion.

Further, as described above, since the heavy oil composition equivalent to C heavy oil has a high content ratio of residual oil and high viscosity, it is generally difficult to improve ignitability, and in addition, it is generally heavy such as residual oil. Since the base material tends to cause sedimentation, it has been difficult to find an alternative heavy base material as a heavy base material constituting a heavy oil composition equivalent to C heavy oil.

Under such circumstances, the present invention can reduce the sulfur content to 0.50% by mass or less and the nitrogen content even when a predetermined amount of heavy base material is contained. It is an object of the present invention to provide a novel heavy oil composition capable of suppressing the occurrence of sedimentation, having a low kinematic viscosity, and easily controlling CCAI within a desired range, and to provide a method for producing such a heavy oil composition. is there.

In order to solve the above problems, the present inventor has conceived to increase the proportion of the gas oil fraction blended in the heavy substrate instead of the heavy substrate.
Conventionally, if the blending ratio of the light oil fraction to be blended in the heavy base material is increased, the properties of the obtained heavy oil composition are likely to be unstable, so that sedimentation is likely to occur, and it is difficult to obtain a desired calorific value. Therefore, it has hardly been examined so far.
However, as a result of diligent studies by the present inventor, a base material (base material A) corresponding to the directly desulfurized heavy oil and the catalytic cracking residual oil having specific properties is blended with the light oil fraction having specific properties in a fixed ratio. Thereby, it is possible to provide a heavy oil composition which can effectively reduce the content ratio of sulfur content and nitrogen content, suppress the occurrence of sedimentation, have low kinematic viscosity, and easily control CCAI within a desired range. It was found that the present invention was completed.

That is, the present invention
(1) Direct desulfurized heavy oil having a sulfur content of 0.50% by mass or less and an actual sediment of 1.00% by mass or less is 10% by mass or more and less than 35% by mass.
It is a base material excluding direct desulfurized heavy oil, CCAI is 890-940, sulfur content is 0.20% by mass to 1.20% by mass, and density at 15 ° C is 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ Base material A is 10% by mass to 25% by mass,
It contains 40% by 80% by volume of a gas oil fraction having a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C. and a CCAI of 840 or less.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
A heavy oil composition, characterized in that the actual sediment is 0.20% by mass or less.
(2) The heavy oil composition according to (1) above, wherein the residual carbon content in the base material A is 5.40% by mass or less.
(3) The heavy oil composition according to (1) or (2) above, wherein the kinematic viscosity at 50 ° C. is 4.00 mm ² / sec to 75.00 mm ² / sec.
(4) A method for producing a heavy oil composition.
Direct desulfurized heavy oil with a sulfur content of 0.50% by mass or less and an actual sediment of 1.00% by mass or less is 10% by mass or more and less than 35% by mass.
It is a base material excluding direct desulfurized heavy oil, CCAI is 890-940, sulfur content is 0.20% by mass to 1.20% by mass, and density at 15 ° C is 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ Base material A is 10% by mass to 25% by mass,
Mix so that the density at 15 ° C. is 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ and the light oil fraction having CCAI of 840 or less is 40% by volume to 80% by volume.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
A method for producing a heavy oil composition, which comprises obtaining a heavy oil composition having an actual sediment of 0.20% by mass or less.
(5) The method for producing a heavy oil composition according to (4) above, wherein the residual carbon content in the base material A is 5.40% by mass or less.
(6) Provided is the method for producing a heavy oil composition according to (4) or (5) above, wherein the obtained heavy oil composition has a kinematic viscosity of 4.00 mm ² / sec to 75.00 mm ² / sec at 50 ° C. It is a thing.

According to the present invention, even when a predetermined amount of a heavy base material is contained, the sulfur content can be reduced to 0.50% by mass or less, the nitrogen content can be reduced, and sedimentation occurs. It is possible to provide a novel heavy oil composition having a low kinematic viscosity and easily controlling CCAI within a desired range, and to provide a method for producing such a heavy oil composition.

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 unless otherwise specified.
"Density at 15 ° C";
JIS K 2249-1 (2011) "Crude oil products and petroleum products-Density test method"
・ "Sulfur content";
The measurement was performed by either the following measurement method 1 or measurement method 2 according to the content of sulfur contained in the sample to be measured.
Measurement method 1 (when the sulfur content is 0.0051% by mass or more):
"Wavelength-dispersed X-ray fluorescence method" specified in JIS K 2541-7 (2003) "Crude oil and petroleum products-Sulfur content test method"
Measurement method 2 (when the sulfur content is 0.0050% by mass or less):
"Crude oil and petroleum products-sulfur content test method" specified in JIS K 2541-6 (2013) (ultraviolet fluorescence method).
・ "Nitrogen"
"Crude oil and petroleum products-nitrogen analysis test method" specified in JIS K 2609 (1998) (chemiluminescence 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-140.7log ₁₀ log ₁₀ (V + 0.85) -80.6 (α)
In formula (α), D indicates the density (kg / m ³ ) at 15 ° C. measured by the above method, and V indicates the kinematic viscosity (mm ² / s) at 50 ° C. measured by the above method.
・ "Existing segmentation"
It means the value measured by ISO 10307-1: 2009 "Petroleum products-Total sediment in resinual fuel oils-".
・ "Residual carbon content"
The residual carbon content means a value measured by JIS K2270.

First, the heavy oil composition of the present invention will be described.
The heavy oil composition of the present invention contains 10% by mass or more and less than 35% by mass of direct desulfurized heavy oil having a sulfur content of 0.50% by mass or less and an actual cement of 1.00% by mass or less.
It is a base material excluding direct desulfurized heavy oil, and has a CCAI of 890 to 940, a sulfur content of 0.20% by mass to 1.20% by mass, and a density at 15 ° C. of 0.9900 g / cm ^{3 to} 1.0550 g / cm ^3. Base material A is 10% by mass to 25% by mass,
It contains 40% by 80% by volume of a gas oil fraction having a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C. and a CCAI of 840 or less.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
It is characterized in that the actual sediment is 0.20% by mass or less.

The heavy oil composition of the present invention contains 10% by mass or more and less than 35% by mass of direct desulfurized heavy oil having a sulfur content of 0.50% by mass or less and an actual cement of 1.00% by mass or less.

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.

Compared with the vacuum distillation residual oil that has been conventionally used as a heavy base material constituting a heavy oil composition, the direct desulfurized heavy oil is more likely to cause sedimentation due to heat received in the desulfurization process, and such sedimentation causes combustion failure. May occur.
However, according to the heavy oil composition of the present invention, the occurrence of sedimentation is suitably suppressed by blending the base material A having specific properties and the light oil fraction in specific ratios with the direct desulfurized heavy oil having specific properties. can do.

Further, since the direct desulfurized heavy oil has a lower sulfur content than the vacuum distillation residual oil used as the main base material of the conventional heavy oil composition, the heavy oil composition contains the directly desulfurized heavy oil. The content of sulfur in the composition can be reduced, and the kinematic viscosity suitable for the heavy oil composition can be easily adjusted.

The direct desulfurized heavy oil has a sulfur content of 0.50% by mass or less, preferably 0.10% by mass to 0.47% by mass, and preferably 0.10% by mass to 0.45% by mass. Some are more preferred.
It is preferable that the sulfur content in the direct desulfurized heavy oil is lower, but if the sulfur content in the direct desulfurized heavy oil is excessively reduced, the desulfurized raw material oil is restricted, harsh treatment conditions are required, and the cost is increased. It becomes easier to connect to up.
When the sulfur content ratio in the direct desulfurized heavy oil is within the above range, the sulfur content of the heavy oil composition can be easily adjusted.

The direct desulfurized heavy oil preferably has a nitrogen content of 0.05% by mass to 0.20% by mass, more preferably 0.05% by mass to 0.18% by mass, and 0.05% by mass. It is more preferably mass% to 0.16% by mass.
When the nitrogen content in the direct desulfurized heavy oil is within the above range, the nitrogen content of the heavy oil composition can be easily adjusted.

The direct desulfurized heavy oil preferably has a residual carbon content of 7.00% by mass or less (0.00% by mass to 7.00% by mass), and is 6.90% by mass or less (0.00% by mass). -6.90% by mass) is more preferable, and 6.80% by mass or less (0.00% by mass to 6.80% by mass) is further preferable.
In the heavy oil composition according to the present invention, the residual carbon content of the direct desulfurized heavy oil is controlled within the above range, so that the formation of carbon in the combustion chamber can be effectively suppressed.

The direct desulfurized heavy oil preferably has a density of 0.9100 g / cm ^{3 to} 0.9370 g / cm ³ at 15 ° C., and more preferably 0.9100 g / cm ^{3 to} 0.9350 g / cm ³ . It is more preferably 0.9100 g / cm ^{3 to} 0.9330 g / cm ³ .
A heavy 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 easily causes combustion non-uniformity and combustion failure. Can be suppressed.

Those directly desulfurized heavy oil, kinematic viscosity at 50 ° ^C., what is 80.00mm ² /s~270.0mm 2 / s are ^{preferred, 82.00mm 2 /s~270.0mm 2 / smm 2} / s and still more ^preferably those which are 84.00mm ² /s~270.0mm 2 / s.
The heavy oil composition prepared by using the direct desulfurized heavy oil having the kinematic viscosity at 50 ° C. in the above range has a good spray state when used in an internal combustion engine, and thus suppresses combustion non-uniformity and misfire. And the heavy oil composition can be stably supplied to the engine.

The direct desulfurization heavy oil preferably has a CCAI of 810 or less, more preferably 790 to 808, and even more preferably 790 to 806.
A heavy oil composition prepared by using a direct desulfurized heavy oil having a CCAI of the direct desulfurized heavy oil within the above range can easily exhibit good ignitability.

The direct desulfurized heavy oil has an actual sediment amount of 1.00% by mass or less (0% by mass to 1.00% by mass) and 0.95% by mass or less (0% by mass to 0.95% by mass). It is preferable that it is 0.90 mass% or less (0 mass% to 0.90 mass%), and it is more preferable.
In the heavy oil composition of the present invention, since the actual amount of direct desulfurized heavy oil is within the above range, the occurrence of sedimentation can be effectively suppressed.
can do.

In the heavy oil composition of the present invention, the content ratio of the direct desulfurized heavy oil is 10% by volume or more and less than 35% by volume, more preferably 12% by volume to 35% by volume, and 14% by volume to 35% by volume. Is even more preferable.

The heavy oil composition of the present invention contains a predetermined amount of the base material A and the light oil fraction having specific properties, and contains the direct desulfurized heavy oil having the specific properties in the above range to reduce the sulfur content. , CCAI can be easily controlled within a desired range with low kinematic viscosity while suppressing the occurrence of sedimentation.

The heavy oil composition of the present invention is a base material excluding direct desulfurized heavy oil, and has a CCAI of 890 to 940, a sulfur content of 0.20% by mass to 1.20% by mass, and a density of 0.9900 g / cm at 15 ° C. ^It contains 10% by mass to 25% by mass of the base material A, which is ^{3 to} 1.0550 g / cm ³ .

The base material A is a type selected from catalytic cracking residual oil, heavy oil distillates such as catalytic cracking heavy oil, slurry oil, and indirect desalted heavy oil, atmospheric distillation residual oil, ethylene bottom oil, solvent stripping oil, and the like. The above can be mentioned.
The catalytic cracking residual oil is a heavy fraction having a boiling point of about 200 ° C. to 800 ° C. and a heavy fraction having a boiling point range of about 200 ° C. to 500 ° C., which are obtained from a fluid cracking apparatus or a residual oil fluid cracking apparatus, respectively. It is one or a mixture of two or more selected from the cracked heavy oil and the slurry oil.
The fluid catalytic cracking apparatus or the residual oil fluid catalytic cracking apparatus is not particularly limited, and a known apparatus can be used.

The base material A preferably has a CCAI of 890 to 940, preferably 892 to 940, and more preferably 894 to 940.
When the CCAI of the base material A is within the above range, the heavy oil composition contains a desired amount of aromatic components and the like, and latent sediment can be suppressed. In addition, the decrease in ignitability can be easily suppressed.

The base material A preferably has a sulfur content of 0.20% by mass to 1.20% by mass, preferably 0.20% by mass to 1.10% by mass, and 0.20% by mass to 1%. It is more preferably 0.00% by 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 or less.

The base material A preferably has a nitrogen content of 0.20% by mass or less, more preferably 0.19% by mass or less, and even more preferably 0.18% by mass or less.
When the nitrogen content in the base material A is within the above range, the nitrogen content of the heavy oil composition can be easily adjusted.

The base material A preferably has a residual carbon content of 5.40% by mass or less (0.00% by mass to 5.40% by mass) and 5.20% by mass or less (0.00% by mass). ~ 5.20% by mass) is more preferable, and 5.00% by mass or less (0.00% by mass to 5.00% by mass) is further preferable.
In the heavy oil composition according to the present invention, when the residual carbon content of the base material A is controlled within the above range, the formation of carbon in the combustion chamber can be effectively suppressed.

The substrate A has a density of 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ at 15 ° C., more preferably 0.9900 g / cm ^{3 to} 1.0500 g / cm ³ , and 0.9900 g. More preferably, it is / cm ^{3 to} 1.0450 g / cm ³ .
When the density of the base material A at 15 ° C. is within the above range, the generation of sedimentation in the obtained heavy oil composition can be efficiently suppressed, and the decrease in ignitability can be suppressed.

Substrate A is a kinematic viscosity at 50 ° ^C., preferably has a 10.00mm ² /s~85.00 mm 2 / ^s, more those that are 14.00mm ² /s~85.00mm 2 / s ^preferably, more preferably those which are 18.00mm ² /s~85.00mm 2 / s.
Since the kinematic viscosity of the base material A at 50 ° C. is within the above range, the heavy oil composition prepared by using the direct desulfurized heavy oil within the above range is stably supplied to an industrial furnace, a boiler, or the like. This makes it possible to improve the spray state when used in an internal combustion engine, so that uneven combustion and misfire can be suppressed.

The base material A preferably has an actual sediment amount of 0.10% by mass or less (0.00% by mass to 0.10% by mass), and is preferably 0.08% by mass or less (0.00% by mass to 0.%). 08% by mass) is more preferable, and 0.06% by mass or less (0.00% by mass to 0.06% by mass) is further preferable.
The heavy oil composition of the present invention can effectively suppress the occurrence of sedimentation by containing the base material A whose actual amount of sedimentation is within the above range.

The content ratio of the base material A in the heavy oil composition of the present invention is preferably 10% by volume to 25% by volume, 12% by volume to 25% by volume, and more preferably 14% by volume to 25% by volume.

The heavy oil composition of the present invention contains a predetermined amount of direct desulfurized heavy oil having specific properties, and also contains a predetermined amount of a base material A having specific properties and a light oil fraction described later, thereby reducing the sulfur content ratio. , CCAI can be easily controlled within a desired range with low kinematic viscosity while suppressing the occurrence of sedimentation.

The heavy oil composition of the present invention contains a gas oil fraction having a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C. and a CCAI of 840 or less by 40% by volume to 80% by volume.

In the present application documents, the gas oil distillate means a material having a boiling point range of about 170 to 600 ° C., which can be usually used as a base material for light oil or heavy oil A, or a base material used for cutback of vacuum distillation residue. , Contact decomposition gas oil, direct distillate gas oil, vacuum gas oil, direct desulfurization gas oil, direct desulfurization gas oil, hydrogenated desulfurization gas oil, indirect desulfurization gas oil, thermal decomposition gas oil, heavy contact decomposition gas oil, desulfurization gas pressure gas oil, etc. One or more can be mentioned. In the present application documents, the gas oil fraction may consist of a mixture of two or more gas oil base materials having predetermined physical properties.
In the documents of the present application, the above-mentioned "cutback" means that a light base material is mixed with the residual oil for the purpose of reducing the kinematic viscosity and the sulfur content, and the above-mentioned light oil fraction is used. , Direct desulfurization heavy oil, base material corresponding to catalytic cracking residue oil (base material A), and cutback residual oil (CBR-H) in which a light base material is mixed with vacuum distillation residue shall be excluded.

The light oil fraction preferably has a sulfur content of 0.50% by mass or less, more preferably 0.47% by mass or less, and even more preferably 0.45% by mass or less.
When the sulfur content of the gas oil fraction is within the above range, the sulfur content in the heavy oil composition can be easily adjusted to 0.50% by mass or less.

The light oil fraction preferably has a nitrogen content of 0.10% by mass or less, more preferably 0.09% by mass or less, and even more preferably 0.08% by mass or less.
When the nitrogen content in the gas oil fraction is within the above range, the nitrogen content of the heavy oil composition can be easily adjusted.

The gas oil fraction preferably has a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C., more preferably 0.8320 g / cm ^{3 to} 0.9300 g / cm ³ . It is more preferably 0.8340 g / cm ^{3 to} 0.9300 g / cm ³ .
When the density of the gas oil fraction at 15 ° C. is within the above range, the heavy oil composition can increase the calorific value per capacity and easily suppress the occurrence of combustion non-uniformity and combustion failure. can do.
When the density at 15 ° C. is higher than the upper limit of the above range, the aromaticity of the obtained heavy oil composition becomes high or the heaviness progresses, and the flammability tends to decrease.

Gas oil fraction, a kinematic viscosity at 50 ° ^C., preferably has a 1.40mm ² /s~50.00mm 2 / ^s, more preferably those which are 1.40mm ² /s~46.00mm 2 / s , more preferably those which are 1.40mm ² /s~42.00mm ² / s.
When the kinematic viscosity of the light oil fraction at 50 ° C. is within the above range, it becomes easy to stably supply the heavy oil composition according to the present invention to an industrial furnace, a boiler, or the like, and when it is used in an internal combustion engine. Since the spray state is good, combustion non-uniformity and misfire can be easily suppressed.

The gas oil fraction has a CCAI of 840 or less, preferably 780 to 840, more preferably 782 to 835, and even more preferably 784 to 830.
When the CCAI of the gas oil fraction is within the above range, it is possible to easily suppress that the obtained heavy oil composition becomes excessively heavy and the ignitability is deteriorated, and it is possible to easily suppress the occurrence of sedimentation.

In the heavy oil composition of the present invention, the content ratio of the light oil fraction is 40% by volume to 80% by volume, preferably 40% by volume to 76% by volume, and preferably 40% by volume to 72% by volume. More preferred.

The heavy oil composition of the present invention contains the above-mentioned light oil fraction in a predetermined amount, and also contains the above-mentioned direct desulfurized heavy oil having the specific properties and the base material A in a predetermined amount, thereby suppressing the destabilization of the properties of the sediment. It is possible to reduce the sulfur content while suppressing the generation, reduce the kinematic viscosity, and easily control CCAI within a desired range.

The heavy oil composition of the present invention may appropriately contain various additives, 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.

The heavy oil composition of the present invention has a sulfur content of 0.50% by mass or less, preferably 0.47% by mass or less, and more preferably 0.45% by mass or less.

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

The heavy oil composition of the present invention preferably has a nitrogen content of 0.12% by mass or less, more preferably 0.11% by mass or less, and preferably 0.10% by mass or less. More preferred.

The heavy oil composition of the present invention can easily control the nitrogen content within a desired range by containing a predetermined amount of each of the direct desulfurized heavy oil, the base material A and the light oil fraction having specific properties.

The heavy oil composition of the present invention preferably has a density at 15 ° C. of 0.8700 g / cm ^{3 to} 0.9600 g / cm ³ , preferably 0.8700 g / cm ^{3 to} 0.9550 g / cm ^3. More preferably, it is 0.8700 g / cm ^{3 to} 0.9500 g / cm ³ .

The heavy oil composition of the present invention preferably has a kinematic viscosity at 50 ° C. of 4.00 mm ² / sec to 80.00 mm ² / sec and 4.00 mm ² / sec to 75.00 mm ² / sec. More preferably, it is 6.00 mm ² / sec to 75.00 mm ² / sec.
Since the heavy oil composition of the present invention has a kinematic viscosity within the above range, it can be stably supplied to an industrial furnace, a boiler, etc., and when used in an internal combustion engine, the spray state is good. Therefore, non-uniformity of combustion and misfire can be suppressed.
When the heavy oil composition of the present invention is low kinematic viscosity marine C heavy oil, the kinematic viscosity is preferably 4.00 mm ² / sec to 20.00 mm ² / sec, and the heavy oil composition of the present invention has high kinematics. If the viscosity marine fuel oil C, it is preferred kinematic viscosity is 20.00 mm ² / s ~80.00mm ² / sec.

The heavy oil composition of the present invention has a CCAI of 860 or less, preferably 800 to 859, and more preferably 800 to 858.

The heavy oil composition of the present invention has an actual sediment of 0.20% by mass or less (0% by mass to 0.20% by mass) and 0.18% by mass or less (0.00% by mass to 0.18% by mass). ), More preferably 0.16% by mass or less (0.00% by mass to 0.16% by mass).

Since the heavy oil composition of the present invention contains a predetermined amount of light oil fraction having specific properties, and also contains a predetermined amount of each of the directly desulfurized heavy oil having specific properties and the base material A, the content ratio of sulfur content is 0.50. It can be reduced to mass% or less, the nitrogen content can be reduced, the destabilization of properties can be suppressed, the generation of sedimentation can be suppressed, the kinematic viscosity can be reduced, and the CCAI can be easily controlled within a desired range. it can.

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

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

According to the present invention, even when a large amount of heavy base material is contained, the sulfur content can be reduced to 0.50% by mass or less, the nitrogen content can be reduced, and sedimentation occurs. It is possible to provide a novel heavy oil composition having a low kinematic viscosity and easily controlling CCAI within a desired range.

Next, a 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.
Direct desulfurized heavy oil with a sulfur content of 0.50% by mass or less and an actual sediment of 1.00% by mass or less is 10% by mass or more and less than 35% by mass.
It is a base material excluding direct desulfurized heavy oil, CCAI is 890-940, sulfur content is 0.20% by mass to 1.20% by mass, and density at 15 ° C is 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ Base material A is 10% by mass to 25% by mass,
Mix so that the density at 15 ° C. is 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ and the light oil fraction having CCAI of 840 or less is 40% by volume to 80% by volume.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
It is characterized in that a heavy oil composition having an actual sediment of 0.20% by mass or less is obtained.

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

In the method for producing a heavy oil composition of the present invention, the direct desulfurized heavy oil is preferably mixed in an amount of 10% by volume or more and less than 35% by volume, preferably 12% by volume to 35% by volume, and 14% by volume to 35% by volume. Is more preferable.

In the method for producing a heavy oil composition of the present invention, the mixing ratio of the direct desulfurized heavy oil having the above specific properties is set within the above range, and the base material A and the light oil fraction having the specific properties are mixed at a predetermined mixing ratio. As a result, the sulfur content can be reduced to 0.50% by mass or less, the nitrogen content can be reduced, the generation of sedimentation can be suppressed, the kinematic viscosity can be reduced, and the CCAI can be easily controlled within a desired range. be able to.

In the method for producing a heavy oil composition of the present invention, the base material A is preferably mixed in an amount of 10% by volume to 25% by volume, preferably 12% by volume to 25% by volume, and 14% by volume to 25% by volume. Is more preferable.

In the method for producing a heavy oil composition of the present invention, the gas oil fraction is preferably mixed by 40% by volume to 80% by volume, preferably by 40% by volume to 76% by volume, and mixed by 40% by volume to 72% by volume. Is more preferable.

In the method for producing a heavy oil composition of the present invention, the target heavy oil composition can be easily prepared by mixing the directly desulfurized heavy oil, the base material A and the light oil fraction by an arbitrary method so as to obtain desired properties. can do.

In the method for producing a heavy oil composition of the present invention, the sulfur content and the nitrogen content in the heavy oil composition obtained by mixing the direct desulfurized heavy oil, the base material A and the light oil fraction having specific properties in a predetermined ratio. The content ratio of CCAI can be easily controlled within a desired range while reducing the content ratio of the fuel oil and suppressing the occurrence of sedimentation.

The details of the heavy oil composition obtained by the production method of the present invention are as described above.
Examples of the heavy oil composition obtained by the production method of the present invention include a C heavy oil composition, and the C heavy oil composition can be suitably used as, for example, a fuel for ships.

According to the present invention, even when a predetermined amount of a heavy base material is contained, the sulfur content is reduced to 0.50% by mass or less, the nitrogen content is reduced, and sedimentation is generated. It is possible to provide a method for producing a novel heavy oil composition which can suppress, have low kinematic viscosity, and easily control CCAI within a desired range.

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

(Examples 1 to 11 and Comparative Examples 1 to 10)
Direct desulfurization heavy oil 1, direct desulfurization heavy oil 2, catalytic cracking residual oil 1, catalytic cracking residual oil 2, catalytic cracking heavy oil, catalytic cracking light oil 1, catalytic cracking light oil 2, indirect cracking light oil, direct cracking having the properties shown in Table 1. Light oil, hydrogenated desulfurized light oil, direct desulfurized heavy oil, desulfurized thermal cracking heavy oil, mixed oil of the above catalytic cracking light oil 2 and hydrocracked light oil (mixing ratio of catalytic cracking light oil 2 and hydrocracking light oil is volume ratio) 3: 2), by blending commercially available C heavy oil in the ratios shown in Tables 2 and 3, respectively, the C heavy oil composition according to Examples 1 to 11 and Comparative Examples 1 to 10. Was prepared.
The catalytic decomposition residual oil 1, the catalytic decomposition residual oil 2, and the catalytic decomposition heavy oil are base materials corresponding to the base material A (satisfying the requirements of the base material A), and are indirect desulfurization gas oil, direct desulfurization gas oil, hydride desulfurization gas oil, and the like. Direct desulfurization heavy oil, desulfurization thermal decomposition heavy oil, mixed oil of catalytically decomposed gas oil 2 and hydrogenated desulfurized gas oil (mixing ratio of catalytically decomposed gas oil 2 and hydrogenated desulfurized gas oil is 3: 2 by volume) Is a base material corresponding to the gas oil distillate (satisfying the requirements for the gas oil distillate).
The properties (sulfur content, nitrogen content, density at 15 ° C., kinematic viscosity at 50 ° C., CCAI, actual sediment) of each of the obtained heavy oil compositions were measured. The results are shown in Tables 2 and 3.

From Tables 2 and 3, the heavy oil compositions of the present invention obtained in Examples 1 to 11 are directly desulfurized heavy oil, base material A (contact decomposition residual oil or catalytic decomposition heavy oil) and light oil, respectively, having specific properties. Since it has a specific property of blending a distillate in a specific ratio, it contains a predetermined amount of a heavy base material such as direct desulfurized heavy oil, catalytically decomposed residual oil, or catalytically decomposed heavy oil. Instead, the sulfur content is reduced to 0.50% by mass or less, the nitrogen content is reduced, the generation of sedimentation is suppressed, the kinematic viscosity is low, and CCAI is easily controlled within the desired range. It can be seen that the ignitability obtained is excellent.

On the other hand, in the comparative heavy oil composition of the present invention obtained in Comparative Examples 1 to 10, the blending ratio of the direct desulfurized heavy oil was out of the predetermined range (Comparative Example 1, Comparative Example 2, Comparative Example 5). , Comparative Example 6, Comparative Example 7, Comparative Example 9), or the blending ratio of the base material A (contact cracking residual oil or catalytic cracking heavy oil) is out of the predetermined range (Comparative Example 6, Comparative Example 7, Comparative Example 8). , The blending ratio of the light oil distillate is out of the predetermined range (Comparative Example 5), or the light oil distillate does not have the predetermined properties (Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example). 4. Comparative Example 8 and Comparative Example 9), since the predetermined base material was not blended in a predetermined ratio (Comparative Example 10), the amount of actual cement was large (Comparative Example 6, Comparative Example 7), or CCAI. High and inferior in ignitability (Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4, Comparative Example 8, Comparative Example 9), High kinematic viscosity (Comparative Example 5, Comparative Example 10), Sulfur content It can be seen that the content is high (Comparative Example 10).

According to the present invention, even when a predetermined amount of a heavy base material is contained, the sulfur content can be reduced to 0.50% by mass or less, the nitrogen content can be reduced, and sedimentation occurs. It is possible to provide a novel heavy oil composition having a low kinematic viscosity and easily controlling CCAI within a desired range, and to provide a method for producing such a heavy oil composition.

Claims (6)

Direct desulfurized heavy oil having a sulfur content of 0.50% by mass or less and an actual sediment of 1.00% by mass or less is 10% by mass or more and less than 35% by mass.
It is a base material excluding direct desulfurized heavy oil, CCAI is 890-940, sulfur content is 0.20% by mass to 1.20% by mass, and density at 15 ° C is 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ Base material A is 10% by mass to 25% by mass,
It contains 40% by 80% by volume of a gas oil fraction having a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C. and a CCAI of 840 or less.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
A heavy oil composition characterized in that the actual sediment is 0.20% by mass or less. The heavy oil composition according to claim 1, wherein the residual carbon content in the base material A is 5.40% by mass or less. The heavy oil composition according to claim 1 or ^2, wherein the kinematic viscosity at 50 ° C. is 4.00 mm ² / sec to 75.00 mm ² / sec. A method of producing a heavy oil composition,
Direct desulfurized heavy oil with a sulfur content of 0.50% by mass or less and an actual sediment of 1.00% by mass or less is 10% by mass or more and less than 35% by mass.
It is a base material excluding direct desulfurized heavy oil, CCAI is 890-940, sulfur content is 0.20% by mass to 1.20% by mass, and density at 15 ° C is 0.9900 g / cm ^{3 to} 1.0550 g / cm ³ Base material A is 10% by mass to 25% by mass,
Mix so that the light oil fraction having a density of 0.8300 g / cm ^{3 to} 0.9300 g / cm ³ at 15 ° C. and a CCAI of 840 or less is 40% by volume to 80% by volume.
Sulfur content is 0.50% by mass or less,
The kinematic viscosity at 50 ° C is 4.00 mm ² / sec to 80.00 mm ² / sec,
CCAI is 860 or less,
A method for producing a heavy oil composition, which comprises obtaining a heavy oil composition having an actual sediment of 0.20% by mass or less. The method for producing a heavy oil composition according to claim 4, wherein the residual carbon content in the base material A is 5.40% by mass or less. The method for producing a heavy oil composition according to claim 4 or 5, wherein the obtained heavy oil composition has a kinematic viscosity of 4.00 mm ² / sec to 75.00 mm ² / sec at 50 ° C.