A Heavy oil composition

Abstract

To provide a novel heavy oil A composition that can effectively suppress formation of wax components at a low temperature while suppressing a decrease in calorific value and ignitability.SOLUTION: A heavy oil A composition has (i) a cetane index of 44.0 or more, (ii) a wax precipitation point of 3.0°C or less, (iii) a ratio expressed by a content ratio of chain saturated hydrocarbons / a content ratio of cyclic saturated hydrocarbons of 0.50 to 0.85 by volume, and (iv) a density at 15°C of 0.8500 g / cm3 to 0.8750 g / cm3.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an A fuel oil composition. [Background technology]

[0002] Heavy oil compositions have traditionally been used for various purposes in various industrial fields, and are classified into three types according to kinematic viscosity in JIS K2205: Type 1 (heavy oil A), Type 2 (heavy oil B), and Type 3 (heavy oil C). Of these heavy oil compositions, heavy oil A is generally used as a fuel oil for heaters for greenhouse heating, for heaters in buildings, and for fishing boats.

[0003] Incidentally, heavy oil A contains a large amount of heavier components compared to gasoline or kerosene, and therefore in the low temperatures of winter or in the low temperatures of cold regions, the large molecular weight saturated hydrocarbons (paraffin components) crystallize to produce wax. The precipitated wax easily clogs the filters in filters used to block impurities installed in combustion equipment, etc., and so there has been a demand for improvements in the low temperature performance of heavy oil A.

[0004] Therefore, in order to suppress the precipitation of saturated hydrocarbons with large molecular weights, methods have been proposed in which kerosene, which is a light base material among the base materials typically used in the production of heavy oil A, is mixed in, or the blending ratio of aromatic hydrocarbons is increased (see, for example, Patent Document 1 (Japanese Patent No. 3,945,798)). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3945798 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] However, since the demand for kerosene is also high in winter, the method described in Patent Document 1 is likely to cause problems in economically producing and supplying both kerosene and heavy oil A, particularly in winter. Furthermore, when kerosene is used as the base material, a decrease in density occurs, which tends to lead to a decrease in the calorific value of the resulting A-type heavy oil. On the other hand, as the aromatic hydrocarbon content increases, the ignition ability of the resulting fuel oil composition A tends to decrease accordingly.

[0007] Under these circumstances, the present invention aims to provide a new heavy oil composition A that can effectively suppress the formation of wax at low temperatures while suppressing a decrease in heat generation and a decrease in ignition ability. [Means for solving the problem]

[0008] As a result of intensive research by the present inventors to solve the above technical problems, it has been found that a cellulose ester resin having a cetane index of 44.0 or more, a wax deposition point of 3.0°C or less, a volume ratio of the content of linear saturated hydrocarbons to the content of cyclic saturated hydrocarbons of 0.50 to 0.85, and a density at 15°C of 0.8500 g / cm are obtained. 3 ~0.8750g / cm 3 The present inventors have found that the above technical problems can be solved by using a heavy oil composition A having the above formula, and have completed the present invention based on this finding.

[0009] That is, the present invention provides (1)(i) Cetane index of 44.0 or more; (ii) a wax deposition point of 3.0°C or less; (iii) the ratio of the content of chain saturated hydrocarbons to the content of cyclic saturated hydrocarbons is 0.50 to 0.85 by volume; (iv) Density at 15°C is 0.8500 g / cm 3 ~0.8750g / cm 3 A heavy oil composition characterized by being (2)(a) The density at 15°C is 0.8200 g / cm 3 That's all, (b) The carbon residue in 10% residual oil is 0.05% by mass or less; (c) A flash point of 60.0°C or higher; (d) Sulfur content is 10 ppm by mass or less; (e) The content of cyclic saturated hydrocarbons is 60.0% by volume to 100.0% by volume. The A heavy oil composition according to the above (1), which contains 8.0% by volume to 35.0% by volume of a cyclic saturated hydrocarbon base material, This provides: Effect of the Invention

[0010] According to the present invention, it is possible to provide a novel fuel oil composition A that can effectively suppress the formation of wax at low temperatures while suppressing a decrease in heat generation and a decrease in ignition ability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described in detail. In this specification, the term "to" used to indicate a range of values ​​indicates a range that includes the values ​​set forth as the upper and lower limits. In addition, when a unit is set forth only for the upper limit of a range of values ​​set forth as "to", this also means that the lower limit is set in the same unit. In the present specification, in which numerical ranges are described in stages, the upper or lower limit value described in a certain numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. In this specification, the content or amount of each component in a composition means, when multiple substances corresponding to each component are present in the composition, the total content or amount of those multiple substances present in the composition, unless otherwise specified. As used herein, combinations of preferred aspects are more preferred aspects.

[0012] In this specification, unless otherwise specified, the values ​​of the following items are values ​​determined using the test methods and calculations described below. · "Cetane Index"; A method using a four-variable equation as specified in JIS K 2280-5:2013. · "Wax precipitation point"; The wax crystallization point means the temperature at which wax in a sample begins to crystallize, and is determined from the extrapolated onset temperature of the exothermic peak in the DSC curve measured by cooling the sample at a constant rate using a DSC (differential scanning calorimeter), as described below. That is, using a Rigaku DSCvesta differential scanning calorimeter, approximately 10 mg of sample is cooled from room temperature at a rate of 5°C per minute in a nitrogen atmosphere with a flow rate of 50 ml per minute, and the exothermic peak due to wax precipitation is obtained. Then, a tangent is drawn at the maximum slope point of the rising part of the exothermic peak, and the temperature at the point where the tangent intersects with the baseline before the peak is determined as the wax precipitation point. "The percentage of saturated linear hydrocarbons and the percentage of saturated cyclic hydrocarbons"; First, using high performance liquid chromatography (HPLC), the saturated fraction (saturated hydrocarbons) and aromatic fraction (aromatic hydrocarbons) are separated under the following conditions. Equipment: Shimadzu Corporation Prominence ISO-UV System (CBM20A) Column: Develosil 30-3 (4.6mm x 250mm, Nomura Chemical Co., Ltd.) Column temperature: room temperature Mobile phase: n-hexane (for HPLC) 1.0mL / min 5.3MPa Sample dilution: Dilute to 20% by volume with n-hexane Sample rack temperature: Room temperature Next, the separated saturated and aromatic components are measured by a gas chromatograph equipped with a hydrogen flame ionization detector (GC-FID) under the following conditions, and the area ratio of each is calculated as mass %. Equipment: Agilent 7890B manufactured by Agilent Technologies Column: DB-HT SimDis 5m x 0.53mm I.D. x 0.15um (145-1001 Agilent) Oven temperature: 40℃(1min)-(30℃ / min)-350℃(2min) Inlet temperature: Oven track mode (oven +3℃) Detector: FID 400℃ Carrier gas: He 0.45702psi 3.51mL / min constant flow 27.453cm / sec Injection method: On-column injection 4 μl Next, the separated saturated fraction is measured using a gas chromatograph mass spectrometer (GC / MS) under the following conditions to obtain an average mass spectrum, and then analyzed according to ASTM D 2786 to determine the volume ratio of chain saturated hydrocarbons to cyclic saturated hydrocarbons. Equipment: Agilent Technologies Agilent 7890A Agilent 5975C quadrupole mass spectrometer Column: DB-1HT 30m x 0.32mm I.D. x 0.10um Oven temperature: 40℃(2min)-(20℃ / min)-300℃(5min) Inlet temperature: Oven track mode (oven +3℃) Transfer line temperature: 300℃ Carrier gas: He constant pressure mode 30kPa initial 2.1mL / min 52cm / sec Solvent waiting time: 2.5 min Mass range:30-750 Threshold:100 Sampling♯2 2.07scan / sec Ionization voltage: EI 70eV Injection method: On-column injection 0.5 μl Finally, assuming that the densities of the saturated and aromatic components are the same, the mass percentage of the saturated components determined by GC-FID is multiplied by the volume ratio of the linear saturated hydrocarbons to the cyclic saturated hydrocarbons determined by GC / MS to determine the volume percentages of linear saturated hydrocarbons and cyclic saturated hydrocarbons in the composition. "Density at 15°C (Density(15°C))"; A method specified in JIS K 2249-1:2011 "Crude oil and petroleum products - Determination of density - (Vibration method)". "Kinematic viscosity at 50°C (Kinematic viscosity (50°C))"; This method is specified in JIS K 2283:2000 "Crude oil and petroleum products - Test method for kinematic viscosity and calculation method for viscosity index." "Sulfur content"; Sulfur content of 500 ppm by mass or less: Method specified in JIS K 2541-6:2003 "Crude petroleum and petroleum products - Determination of sulfur content - Part 6: Ultraviolet fluorescence method." Sulfur content exceeding 500 ppm by mass: Method specified in JIS K 2541-4:2003 "Crude petroleum and petroleum products - Determination of sulfur content - Part 4: Radiation excitation method." · "10% residual carbon content (10% residual carbon content)"; A method specified in JIS K 2270-2:2009 "Crude petroleum and petroleum products - Determination of carbon residue - Part 2: Micro method." · "Sludge volume"; This is the method specified in the All Japan Fisheries Federation A Heavy Oil Dry Sludge Measurement Method Z·G·ST-100. "Carbon Residual": A method specified in JIS K 2270-2:2009 "Crude petroleum and petroleum products - Determination of carbon residue - Part 2: Micro method." ·"flash point" The method specified in JIS K 2265-3:2007 "Determination of flash point - Part 3: Pensky-Martens closed-cell method" (however, for atmospheric distillation residual oil and cyclic saturated hydrocarbon-based base materials, the method specified in JIS K 2265-1:2007 "Determination of flash point - Part 1: Tag closed-cell method" is used). ·“Pour point (PP)” The method specified in JIS K 2269:1987 "Test method for pour point and cloud point of crude oil and petroleum products." "Cloud point" The method specified in JIS K 2269:1987 "Test method for pour point and cloud point of crude oil and petroleum products." · "Distillation characteristics (distillation temperature) in atmospheric distillation"; This method is specified in the "Atmospheric pressure distillation test method" in JIS K 2254:1998 "Petroleum products - Distillation test method". · "Percentage of straight chain saturated hydrocarbons (n-paraffins)"; The n-paraffin content by carbon number is determined by measuring using a gas chromatograph equipped with a hydrogen flame ionization detector (GC-FID) under the following measurement conditions. Equipment: Agilent 6890N manufactured by Agilent Technologies Column: DB-1 60m x 0.32mm ID DF: 0.25μm Detector: FID 350℃ Oven temperature: 60℃(5min)-6℃ / min-340℃(14min) Inlet: Oven track mode (oven temperature +3℃) Carrier gas: He 152kPa (2.9ml / min) constant pressure Make-up gas: Nitrogen 25ml / min FID combustion gas: H2 30ml / min Air 400ml / min Injection volume: 0.5 μl on-column injection Quantitative analysis method: Internal standard method (internal standard: di-n-butyl phthalate) Sample dilution: 0.1 g sample, 1 ml internal standard solution, 4 ml toluene Baseline: Corrected

[0013] The fuel oil composition according to the present invention comprises: (i) Cetane index of 44.0 or more; (ii) a wax deposition point of 3.0°C or less; (iii) a volume ratio represented by the content ratio of chain saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons is 0.50 to 0.85; (iv) Density at 15°C is 0.8500 g / cm 3 ~0.8750g / cm 3 It is characterized in that:

[0014] The A fuel oil composition according to the present invention has (i) a cetane index of 44.0 or more, preferably 44.5 or more, and more preferably 45.0 or more.

[0015] In the A fuel oil composition according to the present invention, (i) the cetane index is not particularly limited in its upper limit, but (i) the cetane index is usually 60.0 or less.

[0016] When the fuel oil composition A according to the present invention has a cetane index of 44.0 or more, it is possible to easily achieve favorable combustion conditions with a good calorific value when combusting the fuel oil composition A.

[0017] The A fuel oil composition according to the present invention has (ii) a wax deposition point of 3.0°C or lower, preferably 2.8°C or lower, and more preferably 2.6°C or lower.

[0018] By setting the wax deposition point of the A fuel oil composition according to the present invention to 3.0° C. or lower, deposition of wax at low temperatures can be effectively suppressed.

[0019] In the A heavy oil composition of the present invention, (iii) the ratio expressed by the content ratio of linear saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons, expressed by volume ratio, is 0.50 to 0.85, preferably 0.50 to 0.83, and more preferably 0.55 to 0.83.

[0020] As described above, the A fuel oil composition contains a large amount of heavier linear saturated hydrocarbons compared to gasoline and kerosene, and it is believed that wax components are produced by crystallization of linear saturated hydrocarbons (n-paraffins). In order to suppress the production of such wax, as mentioned above, one possible approach is to increase the aromatic hydrocarbon content. Typically, one possible approach would be to blend in a certain amount of catalytic cracking oil (LCO (light cycle oil)), which is rich in aromatic hydrocarbons and is obtained when heavy oil is catalytically cracked in a fluid catalytic cracking unit or a residual oil fluid catalytic cracking unit, as a constituent base material. However, as the aromatic hydrocarbon content in the A heavy oil composition increases, this tends to lead to a decrease in ignition ability.

[0021] As a result of investigations, the present inventors have found that, compared to the case where aromatic hydrocarbons are blended with a given amount of linear saturated hydrocarbons, the wax deposition point can be suppressed to a lower temperature when the same amount of cyclic saturated hydrocarbons is blended with the aromatic hydrocarbons. Based on this, the inventors have discovered that when a large amount of cyclic saturated hydrocarbons, instead of aromatic hydrocarbons, is blended into the linear saturated hydrocarbons that constitute the A heavy oil composition, and the "ratio expressed as the content proportion of linear saturated hydrocarbons / the content proportion of cyclic saturated hydrocarbons" of the resulting A heavy oil composition is controlled within a predetermined range in terms of volume ratio, it is possible to effectively suppress the generation of wax at low temperatures while suppressing a decrease in heat generation and a decrease in ignition ability, and have thus completed the present invention.

[0022] In the A heavy oil composition of the present invention, the ratio expressed by the content ratio of chain saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons is within the above-mentioned range in terms of volume ratio, so that the generation of wax at low temperatures can be effectively suppressed while suppressing a decrease in heat generation and a decrease in ignition ability.

[0023] The fuel oil composition according to the present invention has a density of 0.8500 g / cm at 15° C. 3 ~0.8750g / cm 3 and 0.8550 g / cm 3 ~0.8750g / cm 3 and preferably 0.8600 g / cm 3 ~0.8750g / cm 3 It is more preferable that:

[0024] When the density at 15° C. of the fuel oil composition A according to the present invention is within the above range, good combustion conditions can be easily achieved when combusting the fuel oil composition A.

[0025] The A heavy oil composition according to the present invention has a kinematic viscosity at 50°C of 20,000 mm 2 / second or less (0.000mm 2 / sec~20.000mm 2 / sec or less), and 5,000 mm 2 / second or less (0.000mm 2 / sec~5.000mm 2 / sec), and more preferably 4.000 mm 2 / second or less (0.000mm 2 / sec~4.000mm 2 / sec is even more preferable. By having the kinematic viscosity at 50°C of the heavy oil composition A of the present invention be within the above range, it becomes possible to suppress uneven combustion and misfires, and it becomes possible to steadily supply the heavy oil composition A.

[0026] The fuel oil composition A according to the present invention preferably has a sulfur content of 2.0 mass% or less (0.0 mass% to 2.0 mass%), more preferably 1.0 mass% or less (0.0 mass% to 1.0 mass%), and even more preferably 0.5 mass% or less (0.0 mass% to 0.5 mass%). Since the sulfur content of the A heavy oil composition of the present invention is within the above range, the sulfur content in the A heavy oil composition of the present invention can be easily controlled within an appropriate range, and the production of sulfur compounds during combustion can be easily suppressed.

[0027] The A fuel oil composition according to the present invention preferably has a residual carbon content in 10% residual oil of 0.20 mass% to 1.30 mass%, more preferably 0.20 mass% to 1.00 mass%, and even more preferably 0.20 mass% to 0.80 mass%. When the residual carbon content of the 10% residual oil of the A fuel oil composition according to the present invention is within the above range, the formation of sludge can be suitably suppressed.

[0028] The A fuel oil composition according to the present invention preferably has a sludge amount of 10.0 mg / 100 ml or less, more preferably 5.0 mg / 100 ml or less, and even more preferably 2.0 mg / 100 ml or less.

[0029] Since the sludge amount of the heavy oil composition A of the present invention is 10.0 mg / 100 ml or less, clogging of the filter in the filter installed to block impurities can be suppressed, and a heavy oil composition A with high filter oil permeability can be easily provided.

[0030] The A fuel oil composition according to the present invention preferably has a flash point of 60.0°C or higher, more preferably 65.0°C or higher, and even more preferably 70.0°C or higher. The fuel oil composition A according to the present invention has a flash point of 60.0° C. or higher, which makes it possible to handle the composition more safely.

[0031] The pour point of the A fuel oil composition according to the present invention is preferably 5.0°C or lower, more preferably 0.0°C or lower, and even more preferably -5.0°C or lower. By ensuring that the pour point of the fuel oil composition according to the present invention is 5.0° C. or lower, the fluidity of the fuel oil composition can be suitably ensured even in cold regions during the winter. There is no particular lower limit for the pour point of the A fuel oil composition according to the present invention, but the pour point of the A fuel oil composition according to the present invention is usually -60.0°C or higher.

[0032] The fuel oil composition according to the present invention comprises: (a) Density at 15°C is 0.8200 g / cm 3 That's all, (b) The carbon residue in 10% residual oil is 0.05% by mass or less; (c) A flash point of 60.0°C or higher; (d) Sulfur content is 10 ppm by mass or less; (e) The content of cyclic saturated hydrocarbons is 60.0% by volume to 100.0% by volume. It is preferable that the cyclic saturated hydrocarbon base material is contained in an amount of 8.0% by volume to 35.0% by volume.

[0033] In the A heavy oil composition according to the present invention, the (a) density at 15°C of the cyclic saturated hydrocarbon base material is 0.8200 g / cm 3 It is preferable that the g / cm2 is 0.8200 g / cm3 or more.3 ~0.8800g / cm 3 More preferably, it is 0.8300 g / cm 3 ~0.8800g / cm 3 More preferably, it is 0.8350 g / cm 3 ~0.8750g / cm 3 It is even more preferable that:

[0034] In the fuel oil composition A of the present invention, since the (a) density at 15°C of the cyclic saturated hydrocarbon base material is within the above range, it is possible to effectively suppress the production of wax while suppressing a decrease in the calorific value in the fuel oil composition A of the present invention.

[0035] In the A heavy oil composition according to the present invention, the residual carbon content of the (b) 10% residual oil of the cyclic saturated hydrocarbon base stock is preferably 0.05 mass% or less (0.00 mass% to 0.05 mass%), more preferably 0.03 mass% or less (0.00 mass% to 0.03 mass%), and even more preferably 0.02 mass% or less (0.00 mass% to 0.02 mass%).

[0036] In the heavy oil composition A of the present invention, the residual carbon content of the (b) 10% residual oil of the cyclic saturated hydrocarbon base material is within the above range, so that the generation of sludge can be suitably suppressed in the heavy oil composition A of the present invention.

[0037] In the A fuel oil composition according to the present invention, the (c) flash point of the cyclic saturated hydrocarbon base stock is 60.0°C or higher, more preferably 65.0°C or higher, and even more preferably 70.0°C or higher. In the A fuel oil composition according to the present invention, the upper limit of the (c) flash point of the cyclic saturated hydrocarbon base stock is not particularly limited, but the (c) flash point of the cyclic saturated hydrocarbon base stock is usually 80.0°C or lower.

[0038] In the A fuel oil composition according to the present invention, the (c) flash point of the cyclic saturated hydrocarbon base material is 60.0°C or higher, which makes it easy to easily suppress a decrease in the flash point of the A fuel oil composition according to the present invention.

[0039] In the A heavy oil composition according to the present invention, the (d) sulfur content of the cyclic saturated hydrocarbon base stock is preferably 10 ppm by mass or less (0 ppm by mass to 10 ppm by mass), more preferably 8 ppm by mass or less (0 ppm by mass to 8 ppm by mass), even more preferably 5 ppm by mass or less (0 ppm by mass to 5 ppm by mass), and even more preferably 3 ppm by mass or less (0 ppm by mass to 3 ppm by mass).

[0040] In the A fuel oil composition of the present invention, since the (d) sulfur content ratio of the cyclic saturated hydrocarbon base material is within the above range, the sulfur content in the A fuel oil composition of the present invention can be easily controlled within an appropriate range, and the production of sulfur compounds during combustion can be easily suppressed.

[0041] In the A heavy oil composition according to the present invention, the content of (e) cyclic saturated hydrocarbons in the cyclic saturated hydrocarbon base stock is preferably 60.0% by volume to 100.0% by volume, more preferably 65.0% by volume to 100.0% by volume, and even more preferably 70.0% by volume to 100.0% by volume.

[0042] In the heavy oil composition A of the present invention, since the content ratio of (e) cyclic saturated hydrocarbons in the cyclic saturated hydrocarbon base material is within the above range, the ratio represented by "(iii) content ratio of chain saturated hydrocarbons / content ratio of cyclic saturated hydrocarbons" in the heavy oil composition A of the present invention can be easily controlled, and the generation of wax at low temperatures can be effectively suppressed while suppressing a decrease in heat generation amount and a decrease in ignition ability.

[0043] In the A heavy oil composition according to the present invention, the density of the cyclic saturated hydrocarbon base material at 15°C is 0.8200 g / cm 3 ~0.8800g / cm 3 and 0.8300 g / cm 3 ~0.8800g / cm 3 and preferably 0.8350 g / cm 3 ~0.8750g / cm 3It is more preferable that:

[0044] In the A heavy oil composition according to the present invention, the kinetic viscosity of the cyclic saturated hydrocarbon base material at 50°C is 1.000mm 2 / sec~5.000mm 2 / sec is preferred, 1.200 mm 2 / sec~3.000mm 2 / sec is more preferable, and 1.400 mm 2 / sec~2.500mm 2 / sec is even more preferable.

[0045] In the A heavy oil composition according to the present invention, the 10.0% by volume distillation temperature of the cyclic saturated hydrocarbon base material in atmospheric distillation is preferably 200.0°C to 230.0°C, more preferably 205.0°C to 230.0°C, and even more preferably 210.0°C to 230.0°C.

[0046] In the A heavy oil composition according to the present invention, the 50.0% by volume distillation temperature of the cyclic saturated hydrocarbon base material in atmospheric distillation is preferably 210.0°C to 230.0°C, more preferably 215.0°C to 240.0°C, and even more preferably 220.0°C to 240.0°C.

[0047] In the A heavy oil composition according to the present invention, the 90.0% by volume distillation temperature of the cyclic saturated hydrocarbon base material in atmospheric distillation is preferably 225.0°C to 260.0°C, more preferably 230.0°C to 260.0°C, and even more preferably 230.5°C to 260.0°C.

[0048] In the A heavy oil composition according to the present invention, the content of the cyclic saturated hydrocarbon base stock is preferably 8.0% by volume to 35.0% by volume, more preferably 10.0% by volume to 35.0% by volume, and even more preferably 10.0% by volume to 33.0% by volume.

[0049] In the A heavy oil composition of the present invention, since the content of the cyclic saturated hydrocarbon base stock is within the above range, the "(iii) ratio represented by the content of linear saturated hydrocarbons / the content of cyclic saturated hydrocarbons" can be easily controlled within the desired range, and the generation of wax at low temperatures can be effectively suppressed while suppressing a decrease in heat generation and a decrease in ignition ability.

[0050] In the A heavy oil composition according to the present invention, the method for producing the cyclic saturated hydrocarbon base material is not particularly limited, but examples thereof include a method obtained by nuclear hydrogenation of a heavy fraction having a boiling point range of approximately 200.0°C to 300.0°C obtained from a catalytic reforming unit.

[0051] In the A heavy oil composition according to the present invention, the constituent base stock that can be used together with the above-mentioned cyclic saturated hydrocarbon-based base stock is not particularly limited as long as it is one that is normally used as a constituent base stock for A heavy oil compositions, and examples thereof include one or more selected from straight run diesel, vacuum diesel, directly desulfurized light diesel, directly desulfurized heavy diesel, hydrodesulfurized diesel, indirect desulfurized diesel, thermally cracked diesel, heavy catalytically cracked diesel, desulfurized vacuum diesel, catalytically cracked diesel, atmospheric distillation residue, vacuum distillation residue, extract oil, etc.

[0052] The heavy oil composition A of the present invention can easily suppress the wax deposition point to a low temperature even if it has a reduced content of catalytic cracking gas oil, does not contain catalytic cracking gas oil, or has a reduced content of aromatic hydrocarbons.

[0053] The A fuel oil composition according to the present invention may contain various additives in addition to the various base materials described above. The additives are not particularly limited so long as they are those that are usually added to A-type fuel oil compositions, and examples thereof include one or more selected from low-temperature fluidity improvers, pour point depressants, sludge dispersants, rust inhibitors, antioxidants, anticorrosive agents, fungicides, antistatic agents, cetane number improvers, metal deactivators, etc. Furthermore, the A-type fuel oil composition according to the present invention may contain coumarin in view of the diesel delivery tax.

[0054] The A fuel oil composition according to the present invention can be prepared, for example, by mixing the various base materials described above together with various additives as required. In this case, the order and method of mixing the above base materials and additives are not particularly limited.

[0055] According to the present invention, it is possible to provide a novel fuel oil composition A that can effectively suppress the formation of wax at low temperatures while suppressing a decrease in heat generation and a decrease in ignition ability. EXAMPLES

[0056] The present invention will be described in more detail below with reference to examples. However, these examples are representative examples of the present invention and the present invention is not limited to these examples. The analytical values ​​in the table were measured according to the above-mentioned methods. Items marked with "-" indicate that they were not measured or that they were not contained.

[0057] The following constituent base materials were used in the following Examples and Comparative Examples. The physical properties of each constituent base material are shown in Table 1. The following substrates G and H correspond to the cyclic saturated hydrocarbon substrates.

[0058] (constituent base material) Base material A: Straight-run diesel oil Base material B: Hydrodesulfurized straight-run diesel Base material C: Indirect desulfurized diesel Base material D: Vacuum diesel Base material E: catalytic cracking gas oil Base material F: atmospheric distillation residue oil Substrate G: A heavy fraction with a boiling point range of 220.0℃ to 300.0℃ obtained from a catalytic reforming unit, which has been nuclear hydrogenated. Substrate H: A heavy fraction with a boiling point range of 210.0℃ to 280.0℃ obtained from a catalytic reforming unit, which has been nuclear hydrogenated.

[0059] [Table 1]

[0060] (Examples 1 to 4, Comparative Examples 1 to 3) The fuel oil compositions A according to Examples 1 to 4 and Comparative Examples 1 to 3 were prepared by blending the base materials A to H in the proportions shown in Table 2. The properties of the A fuel oil compositions obtained in Examples 1 to 4 and Comparative Examples 1 to 3 are shown in Tables 3 and 4.

[0061] [Table 2]

[0062] [Table 3]

[0063] [Table 4]

[0064] From Table 3, it can be seen that the A heavy oil compositions of the present invention obtained in Examples 1 to 4 have (iii) the ratio (volume ratio) expressed by the content ratio of linear saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons and (iv) the density at 15°C controlled within each of predetermined ranges, while (i) the cetane index and (ii) the wax deposition point are each controlled within each of predetermined ranges, thereby suppressing a decrease in heat generation amount and a decrease in ignition ability, and can effectively suppress the generation of wax at low temperatures, even though the content ratio of linear saturated hydrocarbons (n-paraffins) is equivalent to that of Comparative Examples 1 to 3 (Table 4).

[0065] In contrast, Table 3 shows that the heavy oil compositions A obtained in Comparative Examples 1 to 3 have a low content of cyclic saturated hydrocarbons, and (iii) the ratio (volume ratio) represented by the content ratio of chain saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons is outside the specified range, resulting in (ii) a wax deposition point exceeding 3.0°C (Comparative Examples 1 and 2), and have a high content of cyclic saturated hydrocarbons, and (iii) the ratio (volume ratio) represented by the content ratio of chain saturated hydrocarbons / the content ratio of cyclic saturated hydrocarbons is outside the specified range, resulting in (i) a cetane index of less than 45.0 (Comparative Example 3), which makes it impossible to suppress the production of wax at low temperatures and leads to a decrease in the calorific value. [Industrial Applicability]

[0066] According to the present invention, it is possible to provide a novel fuel oil composition A that can effectively suppress the formation of wax at low temperatures while suppressing a decrease in heat generation and a decrease in ignition ability.

Claims

1. (i) a cetane index of 44.0 or more; (ii) a wax deposition point of 3.0° C. or less; (iii) the ratio of the content of linear saturated hydrocarbons to the content of cyclic saturated hydrocarbons is 0.50 to 0.85 by volume; (iv) Density at 15°C is 0.8500 g / cm ３ ~0.8750g / cm ３ The heavy oil composition A is characterized by:

2. (a) Density at 15°C is 0.8200 g / cm ３ That's all, (b) The residual carbon content of 10% residual oil is 0.05 mass% or less; (c) A flash point of 60.0°C or higher; (d) a sulfur content of 10 ppm by mass or less; (e) The content of cyclic saturated hydrocarbons is 60.0% by volume to 100.0% by volume.

2. The fuel oil composition according to claim 1, comprising 8.0 to 35.0 volume % of a cyclic saturated hydrocarbon base material represented by the formula:

Images