JP3444351B2 - Light oil composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas oil composition having a low sulfur content, and more specifically to a gas oil capable of greatly reducing the amount of particulates in diesel exhaust gas over the entire load range of an engine. It relates to a composition.

[0002]

2. Description of the Related Art Nitrogen oxides (hereinafter referred to as NOx) and particulate matter (hereinafter referred to as PM) are regarded as problems as components contained in diesel exhaust gas. NOx is a substance that is mainly produced by the reaction of nitrogen in the air with oxygen in the engine, and includes NO and NO ₂ . PM is fine particles in exhaust gas, and is soot (soot) due to combustion, and high-boiling point, high-polymer unburned components contained in fuel or lubricating oil are discharged. These substances cause air pollution and acid rain, and immediate reduction measures are required. In addition, aldehydes including formaldehyde and acetaldehyde have recently been attracting attention due to their bad effects on human health and odor. Since October 1997, diesel fuel used as fuel for diesel engines is
The sulfur content is reduced to 500 mass ppm or less on the assumption that an after-treatment device such as an OF catalyst (organic solvent-soluble component oxidation catalyst) and a NOx reduction catalyst is installed. However, these post-processing devices have problems such as low efficiency and durability, and at present, very few are put into practical use. At present, vehicles with the latest exhaust gas reduction measures are being introduced to the market, but since it takes a lot of time to replace existing vehicles, it has not been a fundamental solution. In addition, it is expected to be even more severe 20
Exhaust gas regulations after 2000 are also under consideration.

[0003]

As described above, 2000
Since the strict exhaust gas regulations will be enforced after 1 year, and it will take a lot of time for the vehicle with the latest exhaust gas reduction technology to become popular in the market, it is highly effective.
It is considered that the reduction of exhaust gas by improving the quality of fuel is very effective. There are several possible ways to improve fuels for reducing exhaust gas, but fuels containing oxygen-containing compounds may cause adverse effects on engine components, and many problems must be resolved before they can be used in earnest. . The present invention is
The present invention has been developed in view of such circumstances, and an object thereof is to provide a gas oil composition capable of significantly reducing the emission of particulates contained in diesel exhaust gas over the entire load range of an engine. .

[0004]

The present invention is directed to improving the cetane number.
A gas oil composition containing an agent, comprising a cetane number improver.
Content is 500 mass ppm or more based on the total amount of the composition, cetane
Index is 45 or more, 10% distillation temperature is 155 ~ 210 ℃,
30% distillation temperature is 175 ~ 230 ℃, 50% distillation temperature is
190-250 ° C, 70% distillation temperature is 220-270
℃, 90% distillation temperature 280-315 ℃, 95% distillation temperature
Degree of 350 ℃ or less, aromatic content 10-25 volumes
%, Sulfur content is 500 mass ppm or less, at 30 ° C.
Kinematic viscosity of 1.7 mm ² / s or more, and at 15 ℃
A light oil composition having a density of 830 kg / m ³ or less.
It

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The gas oil composition has a cetane index of 45.
It is necessary to be above. If it is less than 45, the concentrations of NOx, PM and aldehyde in the exhaust gas may increase. Therefore, in the gas oil composition of the present invention,
The cetane index must be 45 or more, and 4
It is preferably 7 or more, more preferably 48 or more, and most preferably 50 or more. The cetane index referred to in the present invention is calculated according to JIS K 2280 "Petroleum products-fuel oil-octane number and cetane number test method and cetane index calculation method", "Calculation method of cetane index using 8.4 variable equation". Refers to the value. The cetane index in the above JIS standard is not applied to those to which a cetane number improver is added, but in the present invention, the cetane index of the cetane number improver to which the cetane number improver is added also uses the above-mentioned "8.4 variable equation". How to calculate the cetane index "
It represents the value calculated by. In the gas oil composition of the present invention, there is no particular limitation regarding the cetane number. However, since the concentrations of NOx, PM and aldehyde in the exhaust gas can be further reduced, the cetane number is 4
It is preferably 5 or more, more preferably 48 or more, and most preferably 50 or more. The cetane number referred to here is JIS K 2280.
It means a cetane number measured according to "7. Cetane number test method" in "Petroleum products-fuel oil-octane number and cetane number test method and cetane index calculation method". Also,
The 90% distillation temperature (T ₉₀ ) of the gas oil composition must be 315 ° C or lower. When it exceeds 315 ° C., the Oh is a risk that the concentration of PM in exhaust gas is high
It The lower limit value of T _90, fuel efficiency more improves, etc. may be possible to increase the output of the engine,
T ₉₀ is a 280 ° C. or higher, preferably, Ru der 285 ° C. or higher.

[0006] the gas oil composition of the present invention, for the distillation properties of the non-T _90, it is desirable to meet the nature of the bottom follow. Initial distillation point: 145 to 180 ° C. 10% by volume distillation temperature (T ₁₀ ): 155 to 210 ° C. 30% by volume distillation temperature (T ₃₀ ): 175 to 230 ° C. 50% by volume distillation temperature (T ₅₀ ): 190 ~ 250 ° C. 70 volume% distillation temperature _{(T 70): 220~ 270 ℃} 95 volume% distillation temperature (T _95): 350 ℃ following distillation end point: 320 to 360 ° C. If initial boiling point of the gas oil composition is too low The initial boiling point is 145 ° C or higher because some light fractions are vaporized and the spraying range is too wide, which may increase the amount of hydrocarbons entrained in the exhaust gas as unburned components. Is recommended. On the other hand, if the initial boiling point is too high, there is a possibility that problems may occur in low temperature startability and low temperature drivability, so the upper limit of the initial boiling point is 180 ° C, preferably 170 ° C. If the T ₁₀ of the gas oil composition is too low, the amount of hydrocarbons entrained in the exhaust gas may be increased for the same reason as when the initial boiling point is too low. Therefore, T ₁₀ is 155 ° C. or higher, preferably It is desirable that the temperature is 160 ° C. or higher, more preferably 165 ° C. or higher. On the other hand, if it is too high, there is a fear that the low-temperature startability and the low-temperature drivability may be impaired, so T ₁₀ is preferably 210 ° C or lower, preferably 205 ° C or lower, and more preferably 200 ° C or lower. When the T ₃₀ of the gas oil composition is too low, there is a concern that the amount of hydrocarbons entrained in the exhaust gas may increase for the same reason as described above. Therefore, T ₃₀ is 175 ° C or higher, preferably 180 ° C.
As described above, more preferably 185 ° C. or higher. On the other hand, if this is too high, or points which may cause trouble in the low-temperature startability and cold drivability et al, 2 30
It is desirable that the temperature is not higher than 0 ° C, more preferably not higher than 210 ° C. From the aspects of fuel economy and engine output, the T ₅₀ of the light oil composition is preferably 190 ° C. or higher, preferably 195 ° C. or higher, more preferably 200 ° C. or higher. Then, in order to reduce the PM concentration in the exhaust gas, T ₅₀ is 2
It is recommended that the temperature is 50 ° C or lower, more preferably 240 ° C or lower, even more preferably 230 ° C or lower, and most preferably 225 ° C or lower. Like the T ₅₀ , the light oil composition T ₇₀ affects fuel efficiency and engine output. In order to further improve fuel efficiency and engine output, T ₇₀ is generally 220 ° C. or higher, preferably 225 ° C. or higher, more preferably 230 ° C. or higher. Then, in order to further reduce the PM concentration in the exhaust gas, T ₇₀ is 2 70
° C. hereinafter, good Mashiku is 265 ° C. or less, and most preferably 26
It is preferably 0 ° C or lower. T _{95 for} gas oil composition is 2
90 ° C or higher is desirable, but PM in exhaust gas
In order to further reduce the concentration, T ₉₅ is 350 ° C or lower,
More preferably, the temperature is 345 ° C or lower, even more preferably 342 ° C or lower, and most preferably 340 ° C or lower. The distillation end point of the light oil composition is preferably 320 ° C. or higher.
However, in order to further reduce the PM concentration in the exhaust gas, the distillation end point is usually 360 ° C or lower, preferably 355 ° C.
It is desirable that the temperature is below, more preferably 350 ° C. or below. Distillation properties (initial boiling point, T ₁₀ ,
T ₃₀ , T ₅₀ , T ₇₀ , T ₉₀ , distillation end point) are all JIS
K 2254 "Petroleum products-Distillation test method".

The sulfur content of the gas oil composition is 500 mass p
If it exceeds pm, the durability of the exhaust gas after-treatment device may be deteriorated, or the inside of the engine may be corroded.
Therefore, the sulfur content of the gas oil composition according to the present invention is 50.
It should be 0 mass ppm or less. And this value is preferably 350 mass ppm or less, 20
It is more preferably 0 mass ppm or less, still more preferably 150 mass ppm or less, and 100
It is even more preferable that the content is less than or equal to mass ppm, and 50
Most preferably, it is not more than ppm by mass. Here, the sulfur content refers to the content of sulfur based on the total amount of the gas oil composition measured by JIS K 2541 "Sulfur content test method". The kinematic viscosity of the gas oil composition of the present invention at 30 ° C. needs to be 1.7 mm ² / s or more.
If it is less than 1.7 mm ² / s, it may be difficult to control the fuel injection timing, and the lubricity of the distribution type fuel injection pump attached to the engine may be impaired. Preferably this kinematic viscosity is 1.72 mm ² / s or more, more preferably 1.73 mm ² / s or more, even more preferably at 1.75 mm ² / s or more, 1.78 mm ² / S or more is even more preferable, and 1.80 mm ² / s or more is the most preferable. There is no particular limitation on the upper limit of the kinematic viscosity at 30 ° C., but since the PM concentration in the exhaust gas can be further reduced, 3.5 mm ²
/ S or less, more preferably 3.0 mm ² / s or less, even more preferably 2.5 mm ² / s or less, even more preferably 2.4 mm ² / s or less It is preferably 2.2 mm ² / s or less, and most preferably 2.2 mm ² / s or less. Here, the kinematic viscosity is JIS K
2283 "Crude oil and petroleum products-Kinematic viscosity test method and viscosity index calculation method" refers to kinematic viscosity. Density at 15 ℃ of the gas oil composition according to the present invention, since it is possible to further improve the fuel consumption rate and acceleration,
The value is preferably 802 kg / m ³ or more.
On the other hand, the upper limit of the density at 15 ° C. is P in the exhaust gas.
Since the M concentration can be lowered further , 830 kg
/ M ³ or less, 8 20 kg / m ³ or less it is good <br/> preferred, and most preferably 815Kg / m ³ or less. Here, the density is JIS K 2249 "Crude oil and petroleum product density test method and density / mass / capacity conversion table".
Refers to the density measured by. In the gas oil composition of the present invention, saturates, for each content of the olefin content and aromatic content, it is desirable to satisfy the following SL. Saturated content: 60 to 95% by volume Olefin content: 0 to 5% by volume Aromatic content: 10 to 25 % by volume Incidentally, the saturated content of the gas oil composition is NOx and PM in the exhaust gas. In order to reduce the concentration of each of the above, generally 60% by volume or more, preferably 65% by volume or more, more preferably 70% by volume or more, most preferably 75% by volume.
The above is desirable. On the other hand, in order to maintain good low-temperature startability and low-temperature drivability, it is desirable that the saturated content is usually 95% by volume or less, preferably 90% by volume or less, and more preferably 85% by volume or less. The olefin content of the gas oil composition is generally 0% by volume to 5% by volume, preferably 0% from the viewpoint of stability of the composition.
It is desirable that the content is from 1% by volume to 1% by volume. Aromatic content of the gas oil composition, the fuel consumption rate and related to the engine output, 1 0% by volume or more, further the good Mashiku 12% by volume or more, and most preferably at 15 vol% or more desirable. On the other hand, the aromatic content, since it is related to the concentration of NOx and PM contained in the exhaust gas, the content is Ru der 2 5 volume% or less. The saturated content, olefin content and aromatic content referred to in the present invention are
It means the volume percentage (volume%) of a saturated component, an olefin component and an aromatic component measured according to the fluorescent indicator adsorption method of "Petroleum Product-Component Test Method" defined in JIS K 2536. The pour point of the gas oil composition of the present invention is not particularly limited. However, from the viewpoint of low temperature startability or low temperature drivability, the pour point of the composition is preferably −5 ° C. or lower, more preferably −10 ° C. or lower, and even more preferably −20 ° C. or lower. It is preferably −30 ° C. or lower, and most preferably −30 ° C. or lower. Here, the pour point refers to the pour point measured by JIS K 2269 “Pour point of crude oil and petroleum products and cloud point test method of petroleum products”. Similarly, the gas oil composition of the present invention,
There is no particular limiting condition for the clogging point. However, generally, the clogging point of the composition is preferably -1 ° C or lower, more preferably -5 ° C or lower, even more preferably -12 ° C or lower, and-
Most preferably, it is 19 ° C. or lower. Here, the clogging point refers to the clogging point measured according to JIS K 2288 "Light oil-Clogging point test method".

The gas oil composition of the present invention must contain the cetane number improver in an amount of 500 mass ppm or more based on the total amount of the composition. For the cetane number improver of the present invention, various compounds known in the art as cetane number improvers can be optionally used, and, for example, nitrate esters, organic peroxides and the like can be used. However, it is preferable to use a nitrate ester as the cetane number improver of the present invention. The nitrate ester includes 2-chloroethyl nitrate, 2-ethoxyethyl nitrate, isopropyl nitrate, butyl nitrate, first amyl nitrate, second amyl nitrate, isoamyl nitrate, first hexyl nitrate, Dihexyl nitrate, n
-Heptyl nitrate, n-octyl nitrate,
It includes various nitrates such as 2-ethylhexyl nitrate, cyclohexyl nitrate, and ethylene glycol dinitrate. Of these, alkyl nitrates having 6 to 8 carbon atoms are preferable. As the cetane number improver, one kind of single compound may be used, or two or more kinds of compounds may be used in combination. In addition, a commercial product called a cetane number improver is generally obtained as an active ingredient that contributes to the cetane number improvement, that is, a cetane number improver diluted with an appropriate solvent. When the gas oil composition of the present invention is prepared using such a commercially available product, it is essential that the content of the active ingredient in the gas oil composition is 500 mass ppm or more based on the total amount of the composition. The content of the cetane number improver in the gas oil composition of the present invention is 500 mass ppm based on the total amount of the composition.
If the above is not satisfied, the NOx concentration, PM concentration, aldehyde concentration, etc. of the diesel engine exhaust gas cannot be lowered to a satisfactory level. In the gas oil composition of the present invention, the content of the cetane number improver defined by the total amount of the composition is preferably 600 mass ppm or more, more preferably 700 mass ppm or more, and 800 mass. It is even more preferably at least ppm, and most preferably at least 900 mass ppm. The upper limit of the content of the cetane number improver is not particularly limited in the present invention, but in general, the content of the cetane number improver is 1400 mass pp based on the total amount of the gas oil composition.
It is preferably m or less, more preferably 1250 mass ppm or less, further preferably 1100 mass ppm or less, and most preferably 1000 mass ppm or less.

In the gas oil composition of the present invention, additives other than the above-mentioned cetane number improver can be blended if necessary, and it is particularly preferable to blend a lubricity improver and / or a detergent. As the lubricity improver, for example, one kind or two or more kinds of carboxylic acid-based, ester-based, alcohol-based and phenol-based lubricity improvers can be optionally used. Among these, carboxylic acid-based and ester-based lubricity improvers are preferable. Examples of carboxylic acid-based lubricity improvers include linoleic acid, oleic acid, salicylic acid, palmitic acid, myristic acid, hexadecenoic acid, and mixtures of two or more of the above carboxylic acids. Examples of the ester-based lubricity improver include carboxylic acid esters of glycerin. The carboxylic acid constituting the carboxylic acid ester may be one kind or two or more kinds, and specific examples thereof include linoleic acid, oleic acid, salicylic acid, palmitic acid, myristic acid, hexadecenoic acid and the like. There is. There is no particular limitation on the blending amount of the lubricity improver. However, in order to bring out the effect of the blended lubricity improver, specifically, in a diesel engine equipped with a distribution type injection pump, the increase in driving torque of the pump during operation is suppressed and the wear of the pump is reduced. Therefore, the blending amount of the lubricity improver is preferably 35 mass ppm or more, and more preferably 50 mass ppm or more based on the total amount of the composition. The upper limit of the compounding amount cannot be obtained even if added more than that.
It is preferably 0 mass ppm or less, and 105 mass p
It is more preferably pm or less. As a cleaning agent,
For example, imide compounds; alkenyl succinimides such as polybutenyl succinimide synthesized from polybutenyl succinic anhydride and ethylene polyamines; polyhydric alcohols such as pentaerythritol, and polybutenyl succinic anhydride. Succinates such as polybutenyl succinates synthesized from; Copolymers such as dialkylaminoethyl methacrylate, polyethylene glycol methacrylate, copolymers of vinylpyrrolidone and alkyl methacrylate, reaction products of carboxylic acid and amine, etc. Any one kind or two or more kinds selected from the ashless detergents can be used, and among them, alkenyl succinimide and a reaction product of a carboxylic acid and an amine are preferably used. Examples of the use of alkenyl succinimide include a molecular weight of 1000 to 3
There are cases where alkenyl succinimide having a molecular weight of about 000 is used alone, and examples where alkenyl succinimide having a molecular weight of 700 to 2000 and alkenyl succinimide having a molecular weight of 10,000 to 20000 are mixed and used. The carboxylic acid constituting the reaction product of the carboxylic acid and the amine is 1
The number may be one or two or more, and specific examples thereof include fatty acids having 12 to 24 carbon atoms and 7 to 24 carbon atoms.
And aromatic carboxylic acids. Fatty acids having 12 to 24 carbon atoms include, but are not limited to, linoleic acid, oleic acid, palmitic acid, myristic acid, and the like. Further, in the aromatic carboxylic acid having 7 to 24 carbon atoms,
Benzoic acid, salicylic acid and the like are included, but are not limited thereto. Further, the amine that constitutes the reaction product of the carboxylic acid and the amine may be one type or two or more types. The amine used here is typically oleylamine, but is not limited thereto, and various amines can be used. There is no particular limitation on the amount of the detergent compounded. However, the effect of incorporating a detergent,
Specifically, in order to bring out the effect of suppressing clogging of the fuel injection nozzle, the amount of the detergent mixed is preferably 30 mass ppm or more, more preferably 60 mass ppm or more, based on the total amount of the composition. It is even more preferable that the amount is 80 mass ppm or more. The effect may not be exhibited even if the amount added is less than 30 mass ppm. On the other hand, if the blending amount is too large, an effect commensurate with it cannot be expected, and conversely, NOx, PM, aldehyde, etc. in the diesel engine exhaust gas may be increased. Therefore, the blending amount of the detergent is 300 mass ppm. The following is preferable and 1
It is more preferably 80 mass ppm or less. In addition,
Similar to the case of the above cetane number improver, the commercially available products referred to as lubricity improvers or detergents are obtained in the state where the active ingredients contributing to the improvement of lubricity or cleaning are diluted with a suitable solvent. It is usually done. When such a commercially available product is blended with the gas oil composition of the present invention, the blending amount described above for the lubricity improver and the detergent means the blending amount as an active ingredient.

The gas oil composition of the present invention may contain other known fuel oil additives alone for the purpose of further enhancing the performance thereof.
Alternatively, a combination of several kinds may be added. Examples of these additives include low temperature fluidity improvers such as ethylene-vinyl acetate copolymer and alkenyl succinamide; antioxidants such as phenol and amine; metal deactivators such as salicylidene derivatives; Anti-freezing agents such as glycol ethers; corrosion inhibitors such as aliphatic amines and alkenyl succinates; antistatic agents such as anionic, cationic and amphoteric surfactants; coloring agents such as azo dyes; silicones Examples thereof include antifoaming agents. The addition amount of these other additives can be arbitrarily determined, but the addition amount of each additive is 0.5% by mass or less, preferably 0.
It is usually 2% by mass or less.

The gas oil composition of the present invention can be produced by any method. Typically, it is produced by mixing a base gas oil with a cetane number improver and, if necessary, a lubricating oil improver, a detergent, and other additives in predetermined amounts. Examples of base gas oil include straight-run light oil obtained from atmospheric distillation equipment of crude oil; vacuum light oil obtained by applying straight-run heavy oil and residual oil obtained from atmospheric distillation equipment to vacuum distillation equipment; from vacuum distillation equipment Hydrorefined gas oil obtained by hydrorefining the obtained vacuum gas oil; hydrodesulfurized gas oil obtained by hydrodesulfurizing straight-run light oil in one or more stages under severer conditions than ordinary hydrorefining; desulfurization Or catalytically cracked gas oil obtained by catalytically cracking undesulfurized vacuum gas oil, vacuum gas oil or desulfurized fuel oil;
Straight-run kerosene obtained by atmospheric distillation of crude oil; hydrorefined kerosene obtained by hydrorefining straight-run kerosene; cracked kerosene obtained by decomposing gas oil fraction obtained by atmospheric distillation of crude oil One kind or two or more kinds can be used. When the sulfur content of the base gas oil exceeds 500 mass ppm, the sulfur content is adjusted to 500 mass pp by an appropriate means such as hydrorefining prior to blending the cetane number improver and the like.
The base gas oil is subjected to a desulfurization treatment to reduce it to m or less.

[0012]

The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. First, Table 1 shows the composition and properties of the gas oil compositions used in Examples and Comparative Examples. The following additives were used. Cetane number improver: 2-ethylhexyl nitrate lubricity improver: Carboxylic acid mixture containing linoleic acid as a main component Detergent: Reaction product of carboxylic acid mixture containing oleic acid as a main component and oleylamine Table 1 The following tests were conducted using each of the light oil compositions shown in. The results are shown in Table 1. (PM concentration measurement test) Using the following engine, the PM concentration was measured in three modes simulating actual running. PM
Was collected on a filter using a mini-dilution tunnel manufactured by Horiba Ltd., and the weight of PM was measured. Table 1 shows the relative values when the result in Comparative Example 1 is 100. (Specifications of engine) Engine type: Natural intake type in-line 6-cylinder diesel displacement: 7.1 L Inner diameter x stroke: 110 mm x 125 mm Compression ratio: 17.5 Maximum output: 260 ps / 2700 rpm Maximum torque: 77 kgf / 2700 rpm (mode ) Pattern 1: Mode simulating actual driving assuming traffic congestion Pattern 2: Mode simulating normal driving Pattern 3: Mode simulating actual driving including driving on a highway (black smoke density (Measurement test) The following vehicle was used to measure the black smoke density by a free accelerator. For black smoke, the density of black smoke was measured using a diesel exhaust black smoke measuring instrument manufactured by Nissan Altia Co., Ltd. Table 1 shows the relative values when the result in Comparative Example 1 is 100. (Vehicle specifications) Engine type: Naturally aspirated in-line 4-cylinder diesel Displacement: 2.97 lL (Lubricity test) HFRR test method An HFRR test was conducted under the following conditions, and a circular circle attached to the test ball after the test. The diameter of the scratch in the vibration direction and the diameter in the direction perpendicular to the vibration direction were measured, and the average value was used as the wear scar diameter (WSD). Test sphere material: ANSI 52100 Hardness: 645HV30 Surface roughness: 0.1 μmRa or less Diameter: 6.25 nm, Test plate material: ANSI 52100 Hardness: 180HV30 Surface roughness: 0.1 μmRa or less Load: 2N Test temperature: 60 ° C. Stroke: 1.0 mm Frequency: 50 Hz Time: 75 minutes (nozzle cleanliness test) A 4-cylinder engine with a displacement of 2 L was used, and continuous operation was performed for 48 hours under the conditions of rotation 1840 rpm and torque 36.4 Nm. The residual flow rate was measured. The residual flow rate of the nozzle is the ratio of the nozzle flow rate after the test to the flow rate of the new nozzle before the test. The nozzle flow rate was measured when the needle valve lift was 0.1 mm. In this test, the larger the nozzle residual flow rate, the better the cleanliness.

[0013]

[Table 1]

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masafumi Yoshimura, 8th Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Higashi Mitsubishi Corporation Central Technology Research Institute (72) Masanori Sekimoto 8th, Chidori-cho, Naka-ku, Yokohama Nisseki Mitsubishi Corporation Central Technology Research Institute (72) Inventor Hiroo Watanabe 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Prefecture Nisseki Mitsubishi Corporation Central Research Laboratories (56) Reference JP 10-152687 (JP, A) ) JP-A-10-273682 (JP, A) JP-A-5-140567 (JP, A) JP-A-8-218082 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C10L 1/08 C10L 1/22

Claims (7)

(57) [Claims] 1. A gas oil composition containing a cetane number improver, wherein the content of the cetane number improver is 5 based on the total amount of the composition.
00 ppm by weight or less on, Seta down exponent is 45 or more, 10% distillation temperature of one hundred fifty-five to two hundred and ten ° C., distillation temperature 30% 175
230 ° C, 50% distillation temperature 190-250 ° C, 70%
Distillation temperature is 220 to 270 ° C, 90% distillation temperature is 280
~ 315 ° C., 9 5% distillation temperature of 350 ° C. or less, aromatic component content of 10 to 25 volume%, sulfur content content than 500 mass ppm, a kinematic viscosity at 30 ° C. is 1.7 mm ² / s
Than on, and the gas oil composition density at 15 ℃ is <br/> 830 kg / m ³ or less. 2. Initial boiling point is 145-170 ° C., 10% distillation
Temperature is 165 to 200 ° C, 30% distillation temperature is 185 to 2
10 ° C, 50% distillation temperature is 200-225 ° C, 70% distillation
Discharge temperature is 225 to 260 ° C, 95% distillation temperature is 290 to 290
340 ° C, distillation end point is 360 ° C or less, aromatic content is
12 to 25% by volume, kinematic viscosity at 30 ° C. is 1.73 to
2.2 mm ² / s, and the density at 15 ° C. is 802-
The gas oil composition according to claim 1, which has a weight of 815 kg / m ³ . 3. The content of the cetane number improver is based on the total amount of the composition.
Quasi-500-1400 mass ppm, cetane index 48 or less
Upper, 70% distillation temperature is 230-260 ° C, distillation end point is 3
20-360 ° C., aromatic content 15-25% by volume,
Sulfur content is 200 mass ppm or less at 30 ° C
Kinematic viscosity is 1.75 to 2.2 mm ² / s, pour point is −5 ° C.
Below, the clogging point is -1 ℃ or less, the cetane number is 50 or more
The diesel fuel composition according to claim 2. 4. The content of the cetane number improver is based on the total amount of the composition.
Approximately 700 to 1400 mass ppm, 90% distillation temperature is 2
85 to 315 ° C, distillation end point is 320 to 355 ° C, sulfur content
Content less than 150 mass ppm, kinematic viscosity at 30 ° C
Is 1.80 to 2.2 mm ² / s, and the pour point is −30 ° C. or higher.
Lower, clogging point -19 ℃ or less, olefin content 0 to 1
The gas oil composition according to claim 3, wherein the gas oil composition is% by volume. 5. The cetane number improver is 2-ethylhexylna.
Itrate, according to any one of claims 1 to 4.
Light oil composition. 6. A carboxylic acid-based or ester-based lubrication
Composition Contains 50 mass ppm or more based on the total amount
The gas oil composition according to any one of claims 1 to 5. 7. Further, an alkenyl succinimide or calcium.
An ashless detergent consisting of the reaction product of boric acid and amine
30 to 300 mass ppm based on the total amount of the product is contained.
The light oil composition according to any one of 1 to 6.