JP5348821B2 - Kerosene composition - Google Patents

Kerosene composition Download PDF

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JP5348821B2
JP5348821B2 JP2005153668A JP2005153668A JP5348821B2 JP 5348821 B2 JP5348821 B2 JP 5348821B2 JP 2005153668 A JP2005153668 A JP 2005153668A JP 2005153668 A JP2005153668 A JP 2005153668A JP 5348821 B2 JP5348821 B2 JP 5348821B2
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sulfur
kerosene
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composition
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JP2006328216A (en
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幸太郎 松本
英治 田中
泰博 荒木
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Eneos Corp
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JXTG Nippon Oil and Energy Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a kerosine composition which is substantially sulfur-free and which maintains the storage stability and excellent combustibility without the addition of an additive such as an antioxidant. <P>SOLUTION: The kerosine composition is characterized in that a ratio (A/B) by mass of (A) a sulfur content of the sulfur compounds derived from benzothiophenes to (B) a sulfur content of the sulfur compounds derived from dibenzothiophenes is 10 or less. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

本発明は、灯油組成物に関し、特には極めて低い硫黄含有量の灯油組成物に関する。   The present invention relates to a kerosene composition, and particularly to a kerosene composition having a very low sulfur content.

灯油は、家庭用ストーブやファンヒーター等の暖房用の燃焼機器やジエット燃料に使用される。このほか、ディーゼルエンジン用燃料の混合基材としても使用されている。このディーゼルエンジン用燃料としては排気ガス浄化触媒の被毒防止から硫黄分が殆どない、いわゆるサルファーフリーの燃料油(軽油、A重油)が望まれている。このため、これらの混合基材として用いられる灯油についてもサルファーフリーにする必要がある。   Kerosene is used in combustion equipment for heating and jet fuel such as household stoves and fan heaters. In addition, it is also used as a mixed base material for diesel engine fuel. As this diesel engine fuel, so-called sulfur-free fuel oil (light oil, heavy fuel oil A) that has almost no sulfur content is desired to prevent poisoning of the exhaust gas purification catalyst. For this reason, it is necessary to make the kerosene used as a mixed base material sulfur-free.

一方、家庭用の暖房機器やジェット燃料についても、亜硫酸ガスなどに基づく異臭や環境負荷を低減するために、サルファーフリー化が要請されている。しかし、灯油中の硫黄分を現状以上に低減させるためには、一般に脱硫条件がよりシビアになり、組成変化による貯蔵安定性や燃焼性の悪化を引き起こす。   On the other hand, with regard to household heating equipment and jet fuel, there is a demand for sulfur-free in order to reduce off-flavors and environmental burdens based on sulfurous acid gas. However, in order to reduce the sulfur content in kerosene beyond the present level, the desulfurization conditions are generally more severe, which causes deterioration in storage stability and combustibility due to composition changes.

このため、硫黄分を10質量ppm以下に低減した灯油については酸化防止性能や燃焼性能を向上させるために添加剤を添加することが提案されている(特許文献1及び2参照)。しかし、酸化防止性能を向上させるために、添加剤を添加する方法は製造コストを引き上げることになり、望ましいものではなかった。
特開2004−182744号公報 特開2004−182745号公報
For this reason, it has been proposed to add an additive to kerosene whose sulfur content has been reduced to 10 mass ppm or less in order to improve the antioxidant performance and combustion performance (see Patent Documents 1 and 2). However, in order to improve the antioxidant performance, the method of adding an additive increases the manufacturing cost and is not desirable.
JP 2004-182744 A JP 2004-182745 A

本発明は、上記課題を解決するもので、酸化防止剤などの添加剤を添加することなしに、貯蔵安定性や良好な燃焼性を保持する実質的にサルファーフリーの灯油組成物を提供することを課題とする。   The present invention solves the above problems, and provides a substantially sulfur-free kerosene composition that retains storage stability and good combustibility without the addition of an additive such as an antioxidant. Is an issue.

本発明者は、鋭意研究を進めた結果、貯蔵安定性や燃焼性の悪化が灯油中の硫黄分を低減する過程で起こる微量のオレフィン類の生成や微量の多環芳香族類の減少に起因し、これらの量が臭素指数及び吸光度と相関性があること、さらに特定の硫黄化合物が灯油貯蔵時の酸化過程で発生する活性種を安定化させる効果があること、及びこれらの量を特定範囲内に制限することにより、酸化防止剤を添加することなく貯蔵安定性の悪化を抑制できることを見出し、本発明に想到した。   As a result of diligent research, the present inventor has resulted from the generation of a small amount of olefins and a decrease in a small amount of polycyclic aromatics that occur in the process of reducing the sulfur content in kerosene due to deterioration in storage stability and flammability. These amounts are correlated with bromine index and absorbance, and certain sulfur compounds have the effect of stabilizing active species generated during oxidation during kerosene storage, and these amounts are within a specific range. By limiting the content to the inside, it was found that deterioration of storage stability can be suppressed without adding an antioxidant, and the present invention has been conceived.

すなわち、本発明の灯油組成物は、ベンゾチオフェン類由来の硫黄化合物の硫黄分とジベンゾチオフェン類由来の硫黄化合物の硫黄分の比が10以下であることを特徴とし、好ましくは硫黄分が10質量ppm以下、さらに好ましくは、硫黄分が5質量ppm以下、かつ臭素指数が90mg/100g以下、波長442nmでの吸光度が0.0021〜0.0094である。   That is, the kerosene composition of the present invention is characterized in that the ratio of the sulfur content of the sulfur compound derived from benzothiophenes and the sulfur content of the sulfur compound derived from dibenzothiophenes is 10 or less, preferably the sulfur content is 10 mass. More preferably, the sulfur content is 5 mass ppm or less, the bromine index is 90 mg / 100 g or less, and the absorbance at a wavelength of 442 nm is 0.0021 to 0.0099.

本発明の灯油組成物は、サルファーフリーであるので、燃焼によって生ずる亜硫酸ガス等に基づく悪臭や環境負荷が低減されるとともに、貯蔵安定性や燃焼性が改善される効果を奏し、さらにこの結果、これらの改善に用いていた添加剤を添加する必要がなくなるので、製造コストを低減できるという格別の効果を奏する。   Since the kerosene composition of the present invention is sulfur-free, it has the effect of reducing malodor and environmental load based on sulfurous acid gas and the like produced by combustion, and improving storage stability and combustibility. Since it is not necessary to add the additive used for these improvements, the production cost can be reduced.

本発明による灯油組成物は、ベンゾチオフェン類由来の硫黄化合物の硫黄分(A)とジベンゾチオフェン類由来の硫黄化合物の硫黄分(B)の質量比(A/B)が10以下とする。好ましくは6以下、さら好ましくは4以下である。A/B比が10を超えると、保管中に過酸化物が増加し、色相が劣化するなど、貯蔵安定性が悪化するという問題が生じるので好ましくない。ベンゾチオフェン類由来の硫黄化合物の硫黄分(A)は少ないほうが好ましく、具体的には、5ppm以下、さらには1ppm以下が好ましい。ジベンゾチオフェン類由来の硫黄化合物の硫黄分(B)は必ずしも少なければ良いものではなく、上記A/B比を満足するように含有されていることが必要である。具体的には、0.1〜5.0ppm程度含有されていることが好ましく、0.1〜2.0ppmがより好ましい。   In the kerosene composition according to the present invention, the mass ratio (A / B) of the sulfur content (A) of the sulfur compound derived from benzothiophenes and the sulfur content (B) of the sulfur compound derived from dibenzothiophenes is 10 or less. Preferably it is 6 or less, More preferably, it is 4 or less. An A / B ratio exceeding 10 is not preferable because a problem arises in that the storage stability deteriorates, such as an increase in peroxide during storage and a deterioration in hue. The sulfur content (A) of the sulfur compound derived from benzothiophenes is preferably small, specifically 5 ppm or less, more preferably 1 ppm or less. The sulfur content (B) of the sulfur compound derived from dibenzothiophenes is not necessarily good as long as it is small, and must be contained so as to satisfy the above A / B ratio. Specifically, the content is preferably about 0.1 to 5.0 ppm, and more preferably 0.1 to 2.0 ppm.

ベンゾチオフェン類由来の硫黄化合物とは、化学発光検出器付きガスクロマトグラフィー法(GC−SCD)により測定されるベンゾチオフェン骨格を有する化合物であり、ベンゾチオフェン及び炭素数1〜4の直鎖及び/又は分岐鎖のアルキル基1〜2個で置換されたアルキルベンゾチオフェン化合物を含む。これらの化合物の具体例としては、ベンゾチオフェン、3−メチルベンゾチオフェン等が挙げられる。
また、ジベンゾチオフェン由来の硫黄化合物とは、GC−SCDにより測定されるジベンゾチオフェン骨格を有する化合物であり、ジベンゾチオフェン及び炭素数1〜4の直鎖及び/又は分岐鎖のアルキル基1〜4個で置換されたアルキルジベンゾチオフェン化合物を含む。これらの化合物の具体例としては、ジベンゾチオフェン、4-メチルジベンゾチオフェン、4,6−ジメチルジベンゾチオフェン、4−エチル−6−メチルジベンゾチオフェン等が挙げられる。これらのアルキルベンゾチオフェン化合物及びアルキルジベンゾチオフェン化合物において、複数のアルキル基を有する場合、アルキル基はそれぞれ同一であっても異なっていても構わない。
A sulfur compound derived from benzothiophenes is a compound having a benzothiophene skeleton measured by a gas chromatography method with a chemiluminescence detector (GC-SCD). Or an alkylbenzothiophene compound substituted with 1 to 2 branched chain alkyl groups. Specific examples of these compounds include benzothiophene and 3-methylbenzothiophene.
The sulfur compound derived from dibenzothiophene is a compound having a dibenzothiophene skeleton measured by GC-SCD, and 1 to 4 linear and / or branched alkyl groups having 1 to 4 carbon atoms and dibenzothiophene. Alkyldibenzothiophene compounds substituted with Specific examples of these compounds include dibenzothiophene, 4-methyldibenzothiophene, 4,6-dimethyldibenzothiophene, 4-ethyl-6-methyldibenzothiophene, and the like. When these alkylbenzothiophene compounds and alkyldibenzothiophene compounds have a plurality of alkyl groups, the alkyl groups may be the same or different.

また、燃焼で発生する亜硫酸ガス等の悪臭や環境負荷を低減するために、硫黄分を10質量ppm以下、好ましくは5質量ppm以下、特には1〜5質量ppmとすることが好ましい。硫黄分を1質量ppm未満にすることは、製造コストが大幅に高くなるため好ましくない。   Further, in order to reduce bad smell such as sulfurous acid gas generated by combustion and environmental load, the sulfur content is preferably 10 ppm by mass or less, preferably 5 ppm by mass or less, particularly 1 to 5 ppm by mass. Setting the sulfur content to less than 1 ppm by mass is not preferable because the production cost is significantly increased.

本発明の灯油組成物は、好ましくは臭素指数が90mg/100g以下であり、さらに好ましくは50〜85mg/100gである。臭素指数が90mg/100gを超えると貯蔵安定性が悪化し、酸化防止剤を添加する必要が生じるため好ましくない。臭素指数は、低い方が好ましいが、さらに低くするには、精製コストが急激に高くなることが予測される。また、臭素指数を低減しすぎると、硫黄分もそれに対応して低減され、特定硫黄化合物による酸化安定性効果が得られなくなることから、臭素指数は50mg/100g以上が好ましい。また、同様の理由により、波長442nmにおける吸光度は0.0021〜0.0094が好ましく、特には、0.0045〜0.0069が好ましい。   The kerosene composition of the present invention preferably has a bromine index of 90 mg / 100 g or less, more preferably 50 to 85 mg / 100 g. When the bromine index exceeds 90 mg / 100 g, the storage stability is deteriorated and it is necessary to add an antioxidant, which is not preferable. A lower bromine index is preferable, but it is expected that the purification cost will increase rapidly to lower the bromine index. Further, if the bromine index is reduced too much, the sulfur content is correspondingly reduced, and the oxidation stability effect by the specific sulfur compound cannot be obtained. Therefore, the bromine index is preferably 50 mg / 100 g or more. For the same reason, the absorbance at a wavelength of 442 nm is preferably 0.0021 to 0.0098, and more preferably 0.0045 to 0.0055.

本発明の灯油組成物は、原料油として、例えば、常圧蒸留装置、接触分解装置、熱分解装置等から得られる灯油留分、すなわち沸点が140〜280℃の範囲で留出する留分を用いて、水素化脱硫することにより得られる。例えば、常圧蒸留装置から留出する沸点範囲140〜280℃の留分をそのまま水素化脱硫したり、或いはこの留分に、接触分解装置や熱分解装置から留出する沸点範囲140〜280℃の留分を0〜40容量%で混合したものを原料とすることにより、簡便に得られる。   In the kerosene composition of the present invention, as a raw material oil, for example, a kerosene fraction obtained from an atmospheric distillation apparatus, a catalytic cracking apparatus, a thermal cracking apparatus, or the like, that is, a fraction distilled at a boiling point of 140 to 280 ° C. And obtained by hydrodesulfurization. For example, a fraction having a boiling range of 140 to 280 ° C. distilled from an atmospheric distillation apparatus is hydrodesulfurized as it is, or a boiling point range of 140 to 280 ° C. is distilled from this fraction from a catalytic cracking apparatus or a thermal cracking apparatus. Can be easily obtained by using a raw material that is a mixture of 0 to 40% by volume.

その水素化脱硫は、水素化脱硫触媒として、Co、Mo、Niを含有し、又所望によりPを担持したものを用い、反応温度270〜350℃、好ましくは295〜320℃、反応圧力2.5〜7.0MPa、好ましくは2.7〜6.6MPa、液空間速度(LHSV)0.9〜6.0h−1、好ましくは0.9〜5.4h−1、水素/オイル比130〜280Nm/kLの条件の範囲で適宜選択して、上述した本発明の灯油組成物が得られるようにする。特には、水素圧、水素/オイル比は大きい方が良いが、あまり大きいと特定の硫黄化合物が除去されるため、上限を超えない様にする。またLHSV、反応温度は低めにするとよい。
本発明の灯油組成物は、上記のような各種の方法で得られた灯油組成物を、化学発光検出器付きガスクロマトグラフィー法(GC−SCD)や、公知の分析方法で、ベンゾチオフェン類由来の硫黄化合物の硫黄分(A)とジベンゾチオフェン類由来の硫黄化合物の硫黄分(B)を分析して、その質量比(A/B)が10以下のものを選択して調製することができる。さらに、2種以上の灯油基材を配合して本発明の範囲内になるように調整して製造することもできる。したがって、上記のような各種の方法で得られた灯油組成物は、A/B比が前記規定の範囲を外れていても、規定の範囲内の灯油組成物や別の規定の範囲外の灯油組成物と適宜の割合で混合することによって、本発明の灯油組成物を調製することができる。
The hydrodesulfurization uses Co, Mo, Ni as a hydrodesulfurization catalyst, and optionally supports P, with a reaction temperature of 270 to 350 ° C., preferably 295 to 320 ° C., a reaction pressure of 2. 5 to 7.0 MPa, preferably 2.7 to 6.6 MPa, liquid space velocity (LHSV) 0.9 to 6.0 h −1 , preferably 0.9 to 5.4 h −1 , hydrogen / oil ratio 130 to The kerosene composition of the present invention described above is obtained by appropriately selecting within the range of the condition of 280 Nm 3 / kL. In particular, it is better that the hydrogen pressure and the hydrogen / oil ratio are large, but if it is too large, a specific sulfur compound is removed, so that the upper limit is not exceeded. In addition, LHSV and reaction temperature should be low.
The kerosene composition of the present invention is derived from benzothiophenes by the gas chromatographic method with a chemiluminescence detector (GC-SCD) or a known analytical method obtained from the kerosene composition obtained by various methods as described above. Can be prepared by analyzing the sulfur content (A) of the sulfur compound and the sulfur content (B) of the sulfur compound derived from dibenzothiophenes, and selecting a mass ratio (A / B) of 10 or less. . Furthermore, it can also be produced by blending two or more kerosene base materials and adjusting them to be within the scope of the present invention. Therefore, the kerosene composition obtained by the various methods as described above, the kerosene composition within the prescribed range or the kerosene outside the other prescribed range even if the A / B ratio is outside the prescribed range. The kerosene composition of the present invention can be prepared by mixing with the composition at an appropriate ratio.

本発明の灯油油組成物について具体的に実施例により説明する。なお、本発明は、以下の実施例のように実施すれば実現できるが、本実施例に限定されるものではない。   The kerosene oil composition of the present invention will be specifically described with reference to examples. In addition, although this invention is realizable if it implements like the following examples, it is not limited to a present Example.

なお、本発明に用いる物性測定方法及び評価方法は、次に示した方法で測定されるものである。
1)密度:JIS K2249「原油及び石油製品密度試験方法」に規定された方法。
2)引火点:JIS K2265「原油及び石油製品引火点試験方法」に規定されたタグ密閉式引火点試験方法。
3)煙点:JIS K2537「煙点試験方法」に規定された方法。
4)蒸留性状:JIS K2254「蒸留試験方法」に規定された方法。
5)動粘度:JIS K2283「動粘度試験方法」に規定された方法により、30℃で測定。
6)硫黄分:JIS K2541−6「硫黄分試験方法(紫外蛍光法)」に規定された方法。
7)窒素分:JIS K2606「窒素分試験方法(化学発光法)」に規定された方法。
8)臭素指数:JIS K2605「石油製品臭素価試験方法(付属書1)」に規定された臭素指数試験方法。
9)アニリン点:JIS K2256「アニリン点及び混合アニリン点試験方法」に規定された方法。
10)色(セーボルト):JIS K2580「石油製品−色試験方法(付属書1)」に準拠して、自動試験器の色差計を用いて測定した。
11)過酸化物価:JPI−5S−46−96「灯油の過酸化物価試験方法」に規定された方法。
12)吸光度:吸光度は、自記型分光光度計により50mm石英セルを用い対象液をノルマルデカンとして波長走査範囲を400〜500nmで波長を走査しその波長442nmの吸光度を測定。または、波長可変型分光光度計により50mm石英セルを用い対象液をノルマルデカンとして波長442nmの吸光度を測定。
13)硫黄化合物の硫黄分:化学発光検出器付きガスクロマトグラフィー法(GC−SCD)により測定。測定条件は次のとおりである。
カラム:SPB−1(SUPELCO社製)
キャリアーガス:ヘリウム
検出器:硫黄化学発光検出器
キャリアーガス流量:3ml/min
GC注入入口温度:330℃
カラム昇温条件:100℃→15℃/min→300℃
検出器温度:310℃
なお、ベンゾチオフェン類由来の硫黄化合物(A)及びジベンゾチオフェン類由来の硫黄化合物(B)は、硫黄分にGC−SCDにおける(A)及び(B)の面積割合を掛けて求めた。
The physical property measurement method and evaluation method used in the present invention are measured by the following methods.
1) Density: The method specified in JIS K2249 “Crude oil and petroleum product density test method”.
2) Flash point: Tag sealed flash point test method specified in JIS K2265 “Crude oil and petroleum product flash point test method”.
3) Smoke point: A method defined in JIS K2537 “Smoke point test method”.
4) Distillation property: A method defined in JIS K2254 “Distillation Test Method”.
5) Kinematic viscosity: Measured at 30 ° C. by the method specified in JIS K2283 “Kinematic viscosity test method”.
6) Sulfur content: A method defined in JIS K2541-6 “Sulfur content test method (ultraviolet fluorescence method)”.
7) Nitrogen content: A method defined in JIS K2606 “Testing method for nitrogen content (chemiluminescence method)”.
8) Bromine index: Bromine index test method defined in JIS K2605 “Petroleum product bromine number test method (Appendix 1)”.
9) Aniline point: A method defined in JIS K2256 “Testing method for aniline point and mixed aniline point”.
10) Color (Saebold): Measured using a color difference meter of an automatic tester in accordance with JIS K2580 “Petroleum products—color test method (Appendix 1)”.
11) Peroxide value: A method defined in JPI-5S-46-96 “Test method for peroxide value of kerosene”.
12) Absorbance: Absorbance is measured by measuring the absorbance at a wavelength of 442 nm by scanning the wavelength at a wavelength scanning range of 400 to 500 nm using a 50 mm quartz cell with a self-recording spectrophotometer and using the target liquid as normal decane. Alternatively, the absorbance at a wavelength of 442 nm is measured with a wavelength variable spectrophotometer using a 50 mm quartz cell and the target liquid as normal decane.
13) Sulfur content of sulfur compound: measured by gas chromatography with a chemiluminescence detector (GC-SCD). The measurement conditions are as follows.
Column: SPB-1 (supplico)
Carrier gas: Helium Detector: Sulfur chemiluminescence detector Carrier gas flow rate: 3ml / min
GC injection inlet temperature: 330 ° C
Column heating conditions: 100 ° C. → 15 ° C./min→300° C.
Detector temperature: 310 ° C
The sulfur compound (A) derived from benzothiophenes and the sulfur compound (B) derived from dibenzothiophenes were determined by multiplying the sulfur content by the area ratio of (A) and (B) in GC-SCD.

灯油組成物の調製
供試灯油1:常圧蒸留装置から留出した沸点範囲140〜280℃の留分を、Co、Mo、Pを担持した市販触媒を用い、反応温度316℃、反応圧力4.4MPa、水素/オイル比140±5Nm/kL、LHSV5.4h−1、水素純度85%の条件下で水素化精製して得た。
供試灯油2:常圧蒸留装置から留出した沸点範囲140〜280℃の留分を、Ni、Mo、Pを担持した市販触媒を用い、反応温度310℃、反応圧力2.7MPa、水素/オイル比130±5Nm/kL、LHSV0.9h−1、水素純度90%の条件下で水素化精製して得た。
供試灯油3:常圧蒸留装置から留出した沸点範囲140〜280℃の留分を、Co、Mo、Pを担持した市販触媒を用い、反応温度335℃、反応圧力4.3MPa、水素/オイル比110±5Nm/kL、LHSV5.2h−1、水素純度94%の条件下で水素化精製して得た。
供試灯油4:常圧蒸留装置から留出した沸点範囲140〜280℃の留分90容量%と熱分解装置から留出する沸点範囲140〜280℃の留分10容量%を混合し、Ni、Co、Moを担持した市販触媒を用い、反応温度295℃、反応圧力6.6MPa、水素/オイル比230〜280Nm/kL、LHSV1.1h−1、水素純度98%の条件下で水素化精製して得た。
上記で調製した各供試灯油1〜4の性状を表1に示した。
Preparation of kerosene composition Test kerosene 1: A fraction having a boiling range of 140 to 280 ° C distilled from an atmospheric distillation apparatus was used with a commercial catalyst supporting Co, Mo, P, reaction temperature 316 ° C, reaction pressure 4 Obtained by hydrorefining under conditions of 0.4 MPa, hydrogen / oil ratio 140 ± 5 Nm 3 / kL, LHSV 5.4 h −1 , hydrogen purity 85%.
Test kerosene 2: A fraction having a boiling range of 140 to 280 ° C distilled from an atmospheric distillation apparatus was used with a commercially available catalyst supporting Ni, Mo, P, a reaction temperature of 310 ° C, a reaction pressure of 2.7 MPa, hydrogen / It was obtained by hydrorefining under the conditions of an oil ratio of 130 ± 5 Nm 3 / kL, LHSV 0.9 h −1 , and hydrogen purity of 90%.
Test kerosene 3: A fraction having a boiling range of 140 to 280 ° C. distilled from an atmospheric distillation apparatus was used with a commercial catalyst supporting Co, Mo, P, a reaction temperature of 335 ° C., a reaction pressure of 4.3 MPa, hydrogen / It was obtained by hydrorefining under the conditions of an oil ratio of 110 ± 5 Nm 3 / kL, LHSV 5.2 h −1 , hydrogen purity 94%.
Test kerosene 4: 90% by volume of a fraction having a boiling range of 140 to 280 ° C. distilled from an atmospheric distillation apparatus and 10% by volume of a fraction having a boiling range of 140 to 280 ° C. distilled from a thermal decomposition apparatus were mixed, and Ni Hydrogenation under the conditions of reaction temperature 295 ° C., reaction pressure 6.6 MPa, hydrogen / oil ratio 230-280 Nm 3 / kL, LHSV 1.1 h −1 , hydrogen purity 98% Obtained by purification.
The properties of each of the test kerosene 1 to 4 prepared above are shown in Table 1.

次にこれらの供試灯油に酸化防止剤を添加せず、ASTM D873に準じ、各供試灯油150mLを耐圧容器に入れ、酸素を封入後、100℃の恒温槽で16時間保持して強制的に灯油を劣化させた。その後、恒温槽から取り出し、室温にまで降温して劣化前後の過酸化物価及び色(セーボルト)をそれぞれ石油学会法(JPI−5S−46−96)及び上記の方法によって測定した。その結果を表1に併せて示した。   Next, without adding an antioxidant to these test kerosene, according to ASTM D873, 150 mL of each test kerosene was put in a pressure vessel, oxygen was sealed, and then kept in a constant temperature bath at 100 ° C. for 16 hours to force Kerosene deteriorated. Then, it took out from the thermostat, cooled to room temperature, and measured the peroxide value and color (Saebold) before and after deterioration by the Japan Petroleum Institute method (JPI-5S-46-96) and the above method, respectively. The results are also shown in Table 1.

Figure 0005348821
Figure 0005348821

上記結果から、本願発明は酸化防止剤を添加しなくても、酸化処理前後での過酸化物価の増加率が低く、また、色相の悪化程度も低い、すなわち、貯蔵安定性に優れることがわかる。   From the above results, it can be seen that the present invention has a low rate of increase in the peroxide value before and after the oxidation treatment and a low degree of deterioration of the hue, that is, excellent storage stability without adding an antioxidant. .

本発明の灯油組成物は、家庭用ストーブやファンヒーター等の暖房用燃焼機器のための燃料、ジエット燃料、さらにはディーゼルエンジン用燃料の混合基材として利用できる。   The kerosene composition of the present invention can be used as a mixed base material for fuels for heating combustion equipment such as household stoves and fan heaters, jet fuels, and diesel engine fuels.

Claims (3)

ベンゾチオフェン類由来の硫黄化合物の硫黄分(A)とジベンゾチオフェン類由来の硫
黄化合物の硫黄分(B)の質量比(A/B)が4以下、かつ、ベンゾチオフェン類由来の
硫黄化合物の硫黄分(A)が5ppm以下、ジベンゾチオフェン類由来の硫黄化合物の硫
黄分(B)が0.1〜2.0ppm、臭素指数が90mg/100g以下であることを特徴
とする灯油組成物。
The mass ratio (A / B) of the sulfur content (A) of the sulfur compound derived from benzothiophenes to the sulfur content (B) of the sulfur compound derived from dibenzothiophenes is 4 or less, and derived from the benzothiophenes
A kerosene composition having a sulfur content (A) of 5 ppm or less, a sulfur content (B) of a sulfur compound derived from dibenzothiophenes of 0.1 to 2.0 ppm, and a bromine index of 90 mg / 100 g or less. object.
硫黄分が10質量ppm以下であることを特徴とする請求項1に記載の灯油組成物。   The kerosene composition according to claim 1, wherein the sulfur content is 10 mass ppm or less. 硫黄分が5質量ppm以下、波長442nmの吸光度が0.0021〜0.0094であ
る請求項1又は2に記載の灯油組成物。

The kerosene composition according to claim 1 or 2, wherein the sulfur content is 5 ppm by mass or less, and the absorbance at a wavelength of 442 nm is 0.0021 to 0.0099.

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