Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L1/00—Liquid carbonaceous fuels
  • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
  • C10L1/08—Liquid carbonaceous fuels essentially based on blends of hydrocarbons for compression ignition

Definitions

• This invention relates to a new fuel oil composition for diesel engines, more particularly the composition characterized by base stock which contains a specific content of normal paraffin compounds having a carbon number of 20 or more, has a specific carbon number distribution in the high-boiling normal paraffin compounds, contains a specific content of polynuclear aromatic hydrocarbon compounds and sulfur at 0.05wt.% or less, and is incorporated with a flow improver and lubricity improver.
• the present invention provides a diesel fuel oil composition characterized by base stock satisfying the relationships 0 ⁇ A 4.00 (wt.%), 0.04 [B/ C ] 0.4 0 and 0 ⁇ D 8.0 (vol.%), containing sulfur at 0.05wt.% or less, and being incorporated with 0.01 to 0.10wt.% of an FI and 0.002 to 0.1wt.% of a lubricity improver.
• the diesel fuel oil composition of the present invention is composed of a base stock which satisfies the relationship 0 ⁇ A 4.00 (wt.%) (wherein, A is content, based on all normal paraffin compounds present in the base stock, of normal paraffin compounds having a carbon number of 20 or more).
• A is content, based on all normal paraffin compounds present in the base stock, of normal paraffin compounds having a carbon number of 20 or more.
• the normal paraffin compounds may separate out as ambient temperature decreases, to cause problems, e.g., clogging of the fuel passage or fuel filter in the diesel engine.
• the diesel fuel oil composition of the present invention is also composed of a base stock which satisfies the relationship 0 ⁇ D 8.0 (vol.%), preferably 0 ⁇ D 5.0, more preferably 0 ⁇ D 3.0 (wherein, D is content (vol.%), based on the whole base stock, of polynuclear aromatic hydrocarbon compounds).
• D is content (vol.%), based on the whole base stock, of polynuclear aromatic hydrocarbon compounds).
• D is content (vol.%), based on the whole base stock, of polynuclear aromatic hydrocarbon compounds.
• PM content in the exhaust gases may increase to an unacceptable level.
• a base stock contains aromatic hydrocarbon compounds at 20 to 40 vol.%; single-ring aromatic hydrocarbon compounds at 12 to 30 vol.% and polynuclear aromatic hydrocarbon compounds (having two or more rings) at 2 to 15 vol.%.
• CFPP was measured as per JIS K-2288.
• [B/C] was determined by the following procedure. Content of an individual normal paraffin compound in each base stock was measured by gas chromatography. Content of the normal paraffin compound having the largest carbon number, and contents of the normal paraffin compounds having smaller carbon numbers are calculated consecutively, where (n) is defined as the number of carbon when total content of normal paraffin compounds having a carbon number of (n) or more is 3.0 wt.% or less and closest thereto, based on the total normal paraffin compounds in the base stock. Next, (content of normal paraffin compounds having a carbon number of (n+5))/(content of normal paraffin compounds having a carbon number of (n)) ratios are calculated consecutively, and the average is taken as [B/C]. The same gas chromatography as that for measurement of "A" was used.
• the fuel oil composition exhibits a notably low CFPP of -9 to -16°C, when it comprises a base stock which has the component A, [B/C] ratio and component D in specific ranges, contains sulfur at 0.05wt.% or less, and is incorporated with an adequate FI and lubricity improver. Its CFPP is significantly lower than that of the base stock by 6 to 11°C. It notably controls PM emissions. It also has high resistance to wear, showing a wear-caused scar of 408 to 421 ⁇ m.
• compositions prepared by COMPARATIVE EXAMPLES shown in Tables 6 and 7, which fail to satisfy the relationship with respect to A or [B/C], has a CFPP value high and virtually unchanged from that of the base stock, even when incorporated with an FI and lubricity improver (COMPARATIVE EXAMPLES 1 to 3 and 9 to 12). It is also found that a fuel oil composition shows insufficient CFPP, essentially on a level with that of the base stock, in the absence of FI, even when its base stock has the component A, [B/C] ratio and component D in specific ranges (COMPARATIVE EXAMPLES 4 and 7).

Landscapes

• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Liquid Carbonaceous Fuels (AREA)

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• 1999
  • 1999-06-25 EP EP99973936A patent/EP1205533A1/de not_active Withdrawn
  • 1999-06-25 CA CA002370525A patent/CA2370525A1/en not_active Abandoned
  • 1999-06-25 WO PCT/JP1999/003434 patent/WO2001000754A1/ja not_active Application Discontinuation

Non-Patent Citations (1)

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