JP3729211B2 - Diesel diesel oil composition - Google Patents
Diesel diesel oil composition Download PDFInfo
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- JP3729211B2 JP3729211B2 JP11543595A JP11543595A JP3729211B2 JP 3729211 B2 JP3729211 B2 JP 3729211B2 JP 11543595 A JP11543595 A JP 11543595A JP 11543595 A JP11543595 A JP 11543595A JP 3729211 B2 JP3729211 B2 JP 3729211B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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Description
【0001】
【産業上の利用分野】
本発明は、自動車,船舶,発電機等に用いられるディーゼルエンジン用の軽油組成物に関し、更に詳しくは北極、南極等の極寒冷地域で使用可能な上記ディーゼル軽油組成物に関する。
【0002】
【従来の技術】
軽油はJIS K 2204「軽油」の規格により、5種類に分類されており、この中で流動点の低い3号又は特3号が一般に寒冷地用として用いられている。このような軽油は通常、寒冷地用に供するべく流動点、曇り点等を下げ、その規格値を満足すべく、軽油留分に灯油留分等を混合して調製されている。特に、市販特3号軽油は、15℃における密度が0.800〜0.810、流動点が−30℃以下と規定されているが、−50℃以下の領域では良好な低温流動性が確保できず、また密度も低いので出力、燃費性能の低下が見られるなど、北極,南極等の極寒冷地への適応が不十分であった。
また一方で、極寒冷地で使用可能な軽油の有するべき性能として、(1)流動性がよく、ワックス等によりフィルターを詰まらせないこと、(2)屋外におけるドラム等からの燃料輸送時において、手回しポンプ等の作業に支障をきたさないこと、(3)低温始動性及び燃焼性が良好で、汚染排ガス(SOx等)の生成量が少ないこと、及び(4)燃料密度及びセタン指数が高く、燃料経済性に優れること、等が要求される。しかしながら、上記性能をすべて満足する燃料組成物は、未だ見出されておらず、極寒冷地の気象条件にも耐えうる軽油組成物が望まれていた。
極寒冷地用の軽油として、例えば、特公平3−47676号公報には、ナフサ留分を改質していわゆるBTX留分を蒸留分離した後の残油を脱ノルマルパラフィン油に添加して流動点の低下を図る方法が開示されている。しかしながら、このような方法によって得られる燃料油は低密度であり、流動性の向上も十分でなく、またセタン指数も低く、更にコストの増大を引き起こすという欠点があり、実用上十分なものとはいえなかった。
【0003】
【発明が解決しようとする課題】
本発明は上記の事情下においてなされたものであり、北極,南極等の極寒冷地においても使用可能であり、特に流動性,低温始動性,燃焼性,経済性に優れ、且つ高出力,低公害であるディーゼル軽油組成物を提供することを目的とするものである。
【0004】
【課題を解決するための手段】
本発明者らは、前記目的を達成するために鋭意研究を重ねた結果、特定の性状及び組成を有する脱硫脱ロウ基材を特定量配合することにより、上記諸特性に優れたディーゼル軽油組成物が得られることを見出したものである。本発明は、かかる知見に基づいて完成したものである。
すなわち、本発明は、170〜390℃の沸点範囲及び0.800〜0.900の密度を有し、0.045重量%以下の硫黄分を含む軽油基材を40〜85容量%含有し、かつ−34.4℃における動粘度が120cSt以下、流動点が−50℃以下、密度が0.825以上、またセタン指数が50以上であり、更に0.048重量%以下の硫黄分を含有することを特徴とするディーゼル軽油組成物を提供するものである。
【0005】
以下に、本発明を更に詳細に説明する。
本発明のディーゼル軽油組成物に含有される軽油基材は、脱硫脱ロウ基材(LATD)であり、その沸点範囲が170〜390℃、密度が0.800〜0.900の範囲にあり、かつ硫黄分含量が0.045重量%以下のものである。密度が0.800より低い場合は出力、燃費性能が低下し、0.900より高い場合はそれに伴い低温粘度が上昇し、作業性に支障をきたす。また硫黄分含量が0.045重量%を超える場合は汚染排ガス(SOx等)の生成が増加し好ましくない。また、上記軽油基材の蒸留性状としては、50%留出点が200〜340℃のものが使用できる。
上記脱硫脱ロウ基材は、具体的には、添付図1に示されるような方法で精製することができる。即ち、図1によれば、原油を常圧蒸留装置(TOPPER)で蒸留して得られた常圧残渣油(RC)を減圧蒸留装置(VAC)で蒸留し、得られる減圧重質留分(MVD及びHVD)、及び同様に得られる減圧残渣油(VR)をプロパン脱れき装置(PD)で処理して得られたプロパン脱れき油(DAO)からなる沸点範囲が200〜800℃の留分からなる潤滑留分(HTF)を水素化脱硫装置(LH)で脱硫し、得られた沸点範囲が200〜400℃の留分からなる脱硫潤滑留分(LAT)を更に水素化脱ロウ装置(LW)により脱ロウ処理して脱硫脱ロウ潤滑留分(LATD)を得る。上記水素化脱ロウ装置(LW)による脱ロウ処理は、上記脱硫潤滑留分(LAT)に、更に重質軽油(HGO)に減圧蒸留装置(VAC)から得られる減圧軽油(VGO)をあわせ減圧軽油脱硫装置(VH)で脱硫処理して得られる沸点範囲140〜390℃の留分からなる脱硫軽質油(VHLGO)を混合して行うこともできる。
【0006】
上記水素化脱硫装置(LH)による水素化脱硫処理は、例えば触媒の存在下で、100〜190kg/cm2 G、好ましくは130〜180kg/cm2 Gの圧力下、340〜440℃、好ましくは350〜420℃の温度で、液空間速度(LHSV)0.3〜1.5h-1、好ましくは0.5〜1.2h-1の条件で行うことができる。使用しうる触媒としては、例えばシリカ・アルミナ、アルミナ及びゼオライトから選ばれる少なくとも一種に周期律表第VIa 族及び第VIII族から選ばれる金属、例えばモリブデン,タングステン,ニッケル等の少なくとも一種を担持した触媒等が挙げられる。
【0007】
上記水素化脱ロウ装置(LW)による水素化脱ロウ処理は、例えばゼオライト系触媒の存在下で、35〜60kg/cm2 Gの圧力下、310〜345℃の温度で、液空間速度(LHSV)1.0〜2.0h-1の条件で行うことができる。
本発明においては、上記脱硫脱ロウ基材(LATD)は、本発明のディーゼル軽油組成物中に40〜85容量%、好ましくは45〜80容量%含有される。この値が85容量%を超える場合は低温粘度が高く、作業性に支障をきたし、また40容量%未満の量では密度が低く、出力が十分でない。上記含有量が上記好ましい範囲内にある場合は、低温粘度,作業性,密度,出力等において更に優れた結果が得られる。
【0008】
本発明のディーゼル軽油組成物は、−34.4℃における動粘度が120cSt以下であり、流動点が−50℃以下、密度が0.825以上、また日本工業規格に準拠したセタン指数が50以上であり、更に0.048重量%以下の硫黄分を含有することを特徴としている。上記動粘度が120cStを超える場合は作業性に支障をきたし、流動点が−50℃より高い場合は低温流動性に劣り、寒冷地への適応が不十分である。また、密度が0.825未満の場合は、加速性及び燃費が悪化し、上記セタン指数が50未満の場合はやはり加速性及び燃費の悪化が見られ、更に硫黄分含量が0.048重量%を超える場合は排ガスが悪化し、いずれも好ましくない。
上記ディーゼル軽油組成物は、上記各々の理由により、−34.4℃における動粘度が120cSt以下であり、流動点が−60℃以下、密度が0.78〜0.9、セタン指数が50以上であり、また硫黄分含量が0.048重量%以下であることが好ましい。
【0009】
本発明のディーゼル軽油組成物には、更に流動点を低下せしめる目的で、流動点降下剤を配合することが好ましい。使用できる流動点降下剤としては、例えばエチレン/酢酸ビニル共重合体,塩素化パラフィン,ポリアルキルメタクリレート,ポリアルキルアクリレート,α−オレフィン/マレエート共重合体及びアルケニルコハク酸アミドから選ばれる少なくとも一種が挙げられる。
本発明のディーゼル軽油組成物には、上記流動点降下剤を500〜10,000ppm,更に800〜8,000ppm含有することが好ましい。上記含有量が500ppm未満では流動点の低下が十分でなく、また10,000ppmを超える場合には添加量の割りには十分な効果が見られない。また、上記好ましい範囲内にある場合は流動点降下及びその他の本発明の効果が更に有効に発揮される。
【0010】
また本発明においては、ナフサ留分を改質し、ベンゼン,トルエン,キシレンのいわゆるBTX留分を蒸留分離した後の釜残油を流動点降下剤として、例えば10〜30容量%の量で使用することができる。上記ナフサ留分を改質した油とは、初留点65〜120℃、終点160〜200℃のナフサ留分を白金系触媒を用いて接触改質して得られる、いわゆるリホーメートと称されるものであり。このリホーメートを蒸留して、BTXを回収した釜残油を使用する。このBTXは、完全に回収される必要はないが、140℃以下の留分がカットされたものを用いることが好ましい。
【0011】
更に、本発明においては、上記流動点降下剤として、減圧蒸留装置を経てアスファルトを製造するのに供される原料油、減圧蒸留残油及びこれと脱硫減圧軽油あるいはこれに類する留出油との混合物、常圧蒸留残油の接触分解及び接触脱硫残油及び熱分解残油から選ばれる一種あるいは二種以上の混合物のうち、アスファルテン含有量が6.0重量%以上または残留炭素分が9.5重量%以上のものを、例えば0.5 〜2.0容量%の量で使用することもできる。ここで、アスファルテン分とはIP−143−79「ASPHALTENES PRECIPITATION WITH NORMAL HEPTANE 」に記載されるn−ヘプタン不溶分とトルエン不溶分の差であり、残留炭素分はJIS K 2270−1980「原油及び石油製品残留炭素分試験方法(コンラドソン法)」による通常の方法により求められる。
【0012】
本発明のディーゼル軽油組成物は、40〜85容量%の脱硫脱ロウ基材を含有してなることを必須とするが、更に脱硫灯油(KERO)を15〜60容量%混合することが好ましい。このような脱硫灯油(KERO)としては、通常沸点範囲が140〜280℃の留分からなり、0.005〜0.30重量%の硫黄分を含有するものが適宜使用される。上記配合量が60容量%を超える場合は密度が低く、出力が十分でない。また、15容量%未満の場合は流動点の低下が十分でない。
また、本発明のディーゼル軽油組成物には、上記留分に加え必要に応じて、一般に用いられるその他の軽油留分、例えば直留軽油(LGO),直接脱硫軽油(DSGO),脱硫軽質軽油(VHLGO),水素化分解軽油(HCGO)、その他すべての軽油基材を10容量%以下の量で含有することができる。これらの灯軽油基材が上記各範囲を超える場合は、流動性や低温粘度の低下が十分でない場合がある。
【0013】
尚、上記軽油留分としての直留軽油(LGO),直接脱硫軽油(DSGO),脱硫軽質軽油(VHLGO),水素化分解軽油(HCGO)については通常の方法で調製することができる。またその一般性状としては下記第1表に示すものが一般に使用可能である。
【0014】
【表1】
【0015】
本発明のディーゼル軽油組成物には、必要に応じてセタン価向上剤,酸化防止剤,金属不活性剤,その他の低温流動性向上剤,氷結防止剤,腐食防止剤,微生物殺菌剤,助燃剤,帯電防止剤,潤滑性向上剤,着色剤,マーカー(標識物質)等の添加剤を適宜加えることができる。
【0016】
【実施例】
以下に、実施例により本発明を更に具体的に説明するが、本発明はこれらの例によってなんら限定されるものではない。
実施例1〜3及び比較例1〜4
第2表に示す性状の脱硫脱ロウ基材(LATD)及び脱硫灯油(KERO)を第3表に示す割合で混合し、更に流動点降下剤としてエチレン・酢酸ビニル共重合体〔パラフロ−240(エクソンケミカル社製)〕を第3表に示すように0.05重量%添加して燃料組成物を調製し、その性状及び性能を評価した。その結果を第3表に示した。尚、比較例3は特公平3−47676号公報明細書実施例1に示される試料油を用い、また比較例4は寒冷地用軽油として市販されている特3号軽油試料を使用した例である。
【0017】
尚、基材及び燃料油の性状及び性能は次の方法によって求めた。
*1 密度 :JIS K 2249に準拠して測定した。
*2 動粘度 :JIS K 2283に準拠して測定した。
*3 蒸留性状 :JIS K 2254に準拠して測定した。
*4 セタン指数:JIS K 2204に準拠して測定した。
*5 硫黄分 :JIS K 2541に準拠して測定した。
*6 流動点 :JIS K 2269に準拠して測定した。
*7 実用性試験:実用試験として、全天候型シャーシダイナモ試験室を用いて、環境温度−30℃におけるディーゼルエンジン車(排気量4.3リットル、最高出力=135PS/3200rpm、最高トルク=32kgm/1700rpm、圧縮比18.5)の加速試験による加速性能と一定速度における燃費を測定した。ここで、加速性試験は40km/時から80km/時迄のフルスロットルによる加速時間を測定し、燃費は60km/時での平坦走行により測定した。
*8 脱ノルマルパラフィン油を常圧蒸留し、200℃以下の留分をカットして得た試料油Aと、ナフサ留分(沸点30〜180℃)をプラットホーミング法により改質して得られたリホーメートを蒸留分離して160℃以下の留分をカットした釜残油である試料油Bとを、試料油Bが試料油AとBの合計量の10容量%となるように混合した試料油。
【0018】
【表2】
【0019】
【表3】
【0020】
【表4】
【0021】
第2表及び第3表から明らかなように、実施例1〜3における脱硫脱ロウ基材(LATD)を含有する軽油組成物の場合、密度を低下させることなくセタン指数が大幅に高くなるため、加速性及び燃費に優れている。また、流動点が非常に低く、極寒冷地用軽油として優れている。
【0022】
【発明の効果】
本発明によれば、北極,南極等の極寒冷地において使用可能であり、流動性,低温始動性,燃焼性,経済性に優れ、且つ高出力,低公害であるディーゼル軽油組成物を提供することができる。
【図面の簡単な説明】
【図1】 本発明の軽油組成物に用いられる脱硫脱ロウ基材の精製法を示す概略工程図である。
【符号の説明】
TOPPER: 常圧蒸留装置
VAC : 減圧蒸留装置
VH : 減圧軽油脱硫装置
PD : プロパン脱れき装置
LH : 水素化脱硫装置
LW : 水素化脱ロウ装置
HGO : 重質軽油
VGO : 減圧軽油
RC : 常圧残渣油
VR : 減圧残渣油
MVD : 減圧重質留分
HVD : 減圧重質留分
DAO : プロパン脱れき油
VHLGO : 脱硫軽質油
HTF : 潤滑留分
LAT : 脱硫潤滑留分
LATD : 脱硫脱ろう潤滑留分[0001]
[Industrial application fields]
The present invention relates to a diesel oil composition for diesel engines used in automobiles, ships, generators, and the like, and more particularly to the diesel diesel oil composition that can be used in extremely cold regions such as the North Pole and the South Pole.
[0002]
[Prior art]
Light oil is classified into five types according to the standard of JIS K 2204 “light oil”. Among them, No. 3 or No. 3 having a low pour point is generally used for cold districts. Such light oil is usually prepared by lowering the pour point, cloud point, etc. for use in cold districts and mixing the kerosene fraction with the light oil fraction to satisfy the standard values. In particular, commercially available special No. 3 diesel oil has a density of 0.800 to 0.810 at 15 ° C. and a pour point of −30 ° C. or lower, but good low temperature fluidity is ensured in the region of −50 ° C. or lower. It was not possible, and because the density was low, the output and fuel consumption performance decreased, and the adaptation to extremely cold regions such as the North Pole and the South Pole was insufficient.
On the other hand, the performance of light oil that can be used in extremely cold regions is as follows: (1) Good fluidity, do not clog the filter with wax, etc. (2) When transporting fuel from drums etc. outdoors (3) The low temperature startability and combustibility are good, the amount of polluted exhaust gas (SOx, etc.) generated is small, and (4) The fuel density and cetane index are high. It is required to have excellent fuel economy. However, a fuel composition that satisfies all the above performances has not yet been found, and a light oil composition that can withstand weather conditions in extremely cold regions has been desired.
As a light oil for extremely cold regions, for example, Japanese Patent Publication No. 3-47676 discloses that a residual oil after reforming a naphtha fraction and distilling and separating a so-called BTX fraction is added to denormalized paraffin oil to flow. A method for reducing the point is disclosed. However, the fuel oil obtained by such a method has a low density, insufficient fluidity improvement, low cetane index, and further causes a cost increase. I couldn't.
[0003]
[Problems to be solved by the invention]
The present invention has been made under the above circumstances, and can be used in extremely cold regions such as the North Pole and the South Pole, and is particularly excellent in fluidity, low temperature startability, combustibility, and economic efficiency, and has high output and low power. It aims at providing the diesel light oil composition which is pollution.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to achieve the above object, the present inventors have formulated a diesel gas oil composition excellent in the above characteristics by blending a specific amount of a desulfurized and dewaxed base material having a specific property and composition. Has been found to be obtained. The present invention has been completed based on such findings.
That is, the present invention contains 40 to 85% by volume of a light oil base material having a boiling point range of 170 to 390 ° C. and a density of 0.800 to 0.900 and containing 0.045% by weight or less of a sulfur content, In addition, the kinematic viscosity at −34.4 ° C. is 120 cSt or less, the pour point is −50 ° C. or less, the density is 0.825 or more, the cetane index is 50 or more, and the sulfur content is 0.048% by weight or less. The diesel light oil composition characterized by the above is provided.
[0005]
Hereinafter, the present invention will be described in more detail.
The light oil base material contained in the diesel light oil composition of the present invention is a desulfurization and dewaxing base material (LATD), the boiling range thereof is 170 to 390 ° C., and the density is in the range of 0.800 to 0.900, In addition, the sulfur content is 0.045% by weight or less. When the density is lower than 0.800, the output and fuel consumption performance are lowered. When the density is higher than 0.900, the low-temperature viscosity is increased accordingly, and the workability is hindered. On the other hand, when the sulfur content exceeds 0.045% by weight, the production of contaminated exhaust gas (SOx, etc.) increases, which is not preferable. Moreover, as a distillation property of the said light oil base material, a 50% distilling point 200-340 degreeC thing can be used.
Specifically, the desulfurization dewaxing base material can be purified by a method as shown in FIG. That is, according to FIG. 1, the atmospheric residue oil (RC) obtained by distilling crude oil with an atmospheric distillation apparatus (TOPPER) is distilled with a vacuum distillation apparatus (VAC), and the resulting heavy vacuum fraction ( MVD and HVD), and a fraction having a boiling point range of 200 to 800 ° C. composed of propane degassed oil (DAO) obtained by treating a vacuum residue oil (VR) obtained in the same manner with a propane degassing apparatus (PD). The dehydrated lubricating fraction (LAT) consisting of a fraction having a boiling point range of 200 to 400 ° C. is further desulfurized with a hydrodesulfurization unit (LH). To obtain a desulfurized dewaxed lubricating fraction (LATD). In the dewaxing treatment using the hydrodewaxing device (LW), the desulfurized lubricating fraction (LAT) is further combined with the heavy gas oil (HGO) and the vacuum gas oil (VGO) obtained from the vacuum distillation device (VAC). A desulfurized light oil (VHLGO) composed of a fraction having a boiling range of 140 to 390 ° C. obtained by desulfurization treatment with a light oil desulfurization apparatus (VH) can also be mixed.
[0006]
The hydrodesulfurization treatment by the hydrodesulfurization apparatus (LH) is performed in the presence of a catalyst, for example, at a pressure of 100 to 190 kg / cm 2 G, preferably 130 to 180 kg / cm 2 G, 340 to 440 ° C., preferably The reaction can be carried out at a temperature of 350 to 420 ° C. under conditions of a liquid hourly space velocity (LHSV) of 0.3 to 1.5 h −1 , preferably 0.5 to 1.2 h −1 . As the catalyst that can be used, for example, a catalyst supporting at least one selected from the group VIa and VIII of the periodic table, for example, at least one selected from silica / alumina, alumina, and zeolite, such as molybdenum, tungsten, nickel, etc. Etc.
[0007]
The hydrodewaxing treatment by the hydrodewaxing device (LW) is performed, for example, in the presence of a zeolitic catalyst at a temperature of 310 to 345 ° C. under a pressure of 35 to 60 kg / cm 2 G and a liquid space velocity (LHSV). ) It can be performed under the condition of 1.0 to 2.0 h −1 .
In the present invention, the desulfurized and dewaxed base material (LATD) is contained in the diesel gas oil composition of the present invention in an amount of 40 to 85% by volume, preferably 45 to 80% by volume. If this value exceeds 85% by volume, the low-temperature viscosity is high, which hinders workability, and if it is less than 40% by volume, the density is low and the output is not sufficient. When the content is within the preferable range, more excellent results are obtained in low temperature viscosity, workability, density, output, and the like.
[0008]
The diesel light oil composition of the present invention has a kinematic viscosity at −34.4 ° C. of 120 cSt or less, a pour point of −50 ° C. or less, a density of 0.825 or more, and a cetane index based on Japanese Industrial Standards of 50 or more. Further, it is characterized by containing a sulfur content of 0.048% by weight or less. When the kinematic viscosity exceeds 120 cSt, workability is hindered. When the pour point is higher than −50 ° C., the low temperature fluidity is inferior and the adaptation to the cold district is insufficient. Further, when the density is less than 0.825, the acceleration and fuel consumption are deteriorated. When the cetane index is less than 50, the acceleration and fuel consumption are also deteriorated, and the sulfur content is 0.048% by weight. Exceeds the exhaust gas, which is not preferable.
The diesel light oil composition has a kinematic viscosity at −34.4 ° C. of 120 cSt or less, a pour point of −60 ° C. or less, a density of 0.78 to 0.9, and a cetane index of 50 or more for each of the above reasons. It is preferable that the sulfur content is 0.048% by weight or less.
[0009]
The diesel light oil composition of the present invention preferably contains a pour point depressant for the purpose of further reducing the pour point. Examples of the pour point depressant that can be used include at least one selected from ethylene / vinyl acetate copolymer, chlorinated paraffin, polyalkyl methacrylate, polyalkyl acrylate, α-olefin / maleate copolymer, and alkenyl succinic acid amide. It is done.
The diesel gas oil composition of the present invention preferably contains 500 to 10,000 ppm, more preferably 800 to 8,000 ppm of the above pour point depressant. When the content is less than 500 ppm, the pour point is not sufficiently lowered, and when it exceeds 10,000 ppm, a sufficient effect is not seen for the addition amount. Moreover, when it exists in the said preferable range, a pour point fall and other effects of this invention are exhibited more effectively.
[0010]
In the present invention, the residual oil after reforming the naphtha fraction and distilling and separating the so-called BTX fraction of benzene, toluene and xylene is used as a pour point depressant, for example, in an amount of 10 to 30% by volume. can do. The oil obtained by modifying the naphtha fraction is referred to as so-called reformate obtained by contact reforming a naphtha fraction having an initial boiling point of 65 to 120 ° C. and an end point of 160 to 200 ° C. using a platinum catalyst. It is a thing. This reformate is distilled and the residual oil from which BTX is recovered is used. This BTX does not need to be completely recovered, but it is preferable to use a material obtained by cutting a fraction of 140 ° C. or lower.
[0011]
Furthermore, in the present invention, as the pour point depressant, a raw material oil, a vacuum distillation residue and a desulfurized vacuum gas oil or similar distillate oil used for producing asphalt through a vacuum distillation apparatus Of one or a mixture of two or more selected from the mixture, catalytic cracking of atmospheric distillation residue and catalytic desulfurization residue and pyrolysis residue, the asphaltene content is 6.0 wt% or more or the residual carbon content is 9. 5% by weight or more can be used in an amount of 0.5 to 2.0% by volume, for example. Here, the asphaltene content is a difference between n-heptane insoluble content and toluene insoluble content described in IP-143-79 “ASPHALTENES PRECIPITATION WITH NORMAL HEPTANE”. Residual carbon content is JIS K 2270-1980 “crude oil and petroleum It is determined by the usual method according to “Product residual carbon content test method (Conradson method)”.
[0012]
The diesel light oil composition of the present invention is required to contain 40 to 85% by volume of a desulfurized and dewaxed base material, but it is preferable to further mix 15 to 60% by volume of desulfurized kerosene (KERO). As such a desulfurized kerosene (KERO), what consists of a fraction whose normal boiling range is 140-280 degreeC, and contains 0.005-0.30 weight% sulfur content is used suitably. When the blending amount exceeds 60% by volume, the density is low and the output is not sufficient. On the other hand, if it is less than 15% by volume, the pour point is not sufficiently lowered.
In addition to the above fractions, the diesel gas oil composition of the present invention includes other gas oil fractions that are generally used, for example, straight gas oil (LGO), direct desulfurized gas oil (DSGO), desulfurized light gas oil (as required). VHLGO), hydrocracked light oil (HCGO), and all other light oil base materials can be contained in an amount of 10% by volume or less. When these kerosene oil bases exceed the above ranges, the fluidity and low temperature viscosity may not be sufficiently reduced.
[0013]
The straight-run gas oil (LGO), direct desulfurized gas oil (DSGO), desulfurized light gas oil (VHLGO), and hydrocracked gas oil (HCGO) as the light oil fraction can be prepared by ordinary methods. As the general properties, those shown in Table 1 below can be generally used.
[0014]
[Table 1]
[0015]
The diesel light oil composition of the present invention includes a cetane number improver, an antioxidant, a metal deactivator, other low-temperature fluidity improvers, an anti-icing agent, a corrosion inhibitor, a microbial disinfectant, and a combustion aid as necessary. Additives such as antistatic agents, lubricity improvers, colorants, markers (labeling substances) can be added as appropriate.
[0016]
【Example】
Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to these examples.
Examples 1-3 and Comparative Examples 1-4
The desulfurized dewaxed base material (LATD) and desulfurized kerosene (KERO) having the properties shown in Table 2 were mixed in the proportions shown in Table 3, and an ethylene / vinyl acetate copolymer [Paraflo-240 ( As shown in Table 3, 0.05% by weight was added to prepare a fuel composition, and its properties and performance were evaluated. The results are shown in Table 3. Comparative Example 3 uses the sample oil shown in Example 1 of Japanese Patent Publication No. 3-47676, and Comparative Example 4 is an example using a special No. 3 light oil sample commercially available as a light oil for cold districts. is there.
[0017]
The properties and performance of the base material and fuel oil were determined by the following method.
* 1 Density: Measured according to JIS K 2249.
* 2 Kinematic viscosity: Measured according to JIS K 2283.
* 3 Distillation property: Measured according to JIS K 2254.
* 4 Cetane index: Measured according to JIS K 2204.
* 5 Sulfur content: Measured according to JIS K2541.
* 6 Pour point: Measured according to JIS K 2269.
* 7 Practicality test: As a practical test, using an all-weather chassis dynamo test chamber, a diesel engine vehicle at an environmental temperature of -30 ° C (displacement 4.3 liters, maximum output = 135 PS / 3200 rpm, maximum torque = 32 kgm / 1700 rpm The acceleration performance and the fuel consumption at a constant speed were measured by an acceleration test with a compression ratio of 18.5). Here, in the acceleration test, acceleration time by full throttle from 40 km / hour to 80 km / hour was measured, and fuel consumption was measured by flat running at 60 km / hour.
* 8 Obtained by modifying the sample oil A obtained by subjecting denormalized paraffin oil to atmospheric distillation and cutting a fraction of 200 ° C or less and a naphtha fraction (boiling point 30 to 180 ° C) by the platforming method. Sample oil B, which is a residue oil obtained by distilling and separating the reformate and cutting a fraction of 160 ° C. or less, is mixed so that the sample oil B is 10% by volume of the total amount of the sample oils A and B. oil.
[0018]
[Table 2]
[0019]
[Table 3]
[0020]
[Table 4]
[0021]
As is apparent from Tables 2 and 3, in the case of the light oil composition containing the desulfurization and dewaxing base material (LATD) in Examples 1 to 3, the cetane index is significantly increased without reducing the density. Excellent acceleration and fuel consumption. In addition, it has a very low pour point and is excellent as a light oil for extremely cold regions.
[0022]
【The invention's effect】
According to the present invention, there is provided a diesel light oil composition that can be used in extremely cold regions such as the North Pole and Antarctica, is excellent in fluidity, low temperature startability, combustibility, and economic efficiency, and has high output and low pollution. be able to.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic process diagram showing a purification method for a desulfurization / dewaxing base material used in a light oil composition of the present invention.
[Explanation of symbols]
TOPPER: Atmospheric distillation unit VAC: Vacuum distillation unit VH: Vacuum gas oil desulfurization device PD: Propane degassing device LH: Hydrodesulfurization device LW: Hydrodewaxing device HGO: Heavy gas oil VGO: Vacuum gas oil RC: Atmospheric residue Oil VR: Vacuum residue oil MVD: Vacuum heavy fraction HVD: Vacuum heavy fraction DAO: Propane debris oil VHLGO: Desulfurized light oil HTF: Lubricant fraction LAT: Desulfurized lubricant fraction LATD: Desulfurized dewaxed lubricant fraction
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11543595A JP3729211B2 (en) | 1995-05-15 | 1995-05-15 | Diesel diesel oil composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11543595A JP3729211B2 (en) | 1995-05-15 | 1995-05-15 | Diesel diesel oil composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08302366A JPH08302366A (en) | 1996-11-19 |
| JP3729211B2 true JP3729211B2 (en) | 2005-12-21 |
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| JP11543595A Expired - Fee Related JP3729211B2 (en) | 1995-05-15 | 1995-05-15 | Diesel diesel oil composition |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11256170A (en) * | 1998-03-13 | 1999-09-21 | Idemitsu Kosan Co Ltd | Diesel fuel composition |
| JP2001098286A (en) * | 1999-09-30 | 2001-04-10 | Nippon Mitsubishi Oil Corp | Light oil composition |
| US20040144690A1 (en) * | 2002-12-20 | 2004-07-29 | Lloyd David Hugh | Diesel fuel compositions |
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