Fuel oil compositions with improved cold flow properties

a technology of cold flow and composition, applied in the direction of lubricant composition, liquid carbonaceous fuel, fuel, etc., can solve the problems of clogging of fuel filters in tanks and motor vehicles, including other fuel constituents, etc., and achieve the effect of improving performan

Inactive Publication Date: 2007-05-03
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] Surprisingly, this object is achieved by the unexpected observation that polymers which contain, in copolymerized form, an α-olefin, a vinyl

Problems solved by technology

These wax crystals have a spongelike structure and lead to inclusion of other fuel constituents in the crystal struc

Method used

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  • Fuel oil compositions with improved cold flow properties
  • Fuel oil compositions with improved cold flow properties
  • Fuel oil compositions with improved cold flow properties

Examples

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Effect test

examples 1 to 23

Preparative Examples 1 to 23

[0136] A total of 23 different inventive polymers were prepared by high-pressure polymerization of ethylene, 2-ethylhexyl acrylate (EHA) and vinyl acetate (VAC).

[0137] Table 1 compares the properties of the polymers used in the test examples which follow.

[0138] The content of ethylene, EHA and VAC in the resulting polymers was determined by NMR spectroscopy. The viscosities were determined to Ubbelohde DIN 51562.

TABLE 1PolymerEVACEHAViscosityNo.[Mol %][Mol %][Mol %][mm2 / s]MnMwMw / Mn188.04.27.860208841892.01288.04.47.6150295966662.25388.14.47.56054635128112.76486.63.99.560212442852.02586.44.39.3150302267542.23686.44.19.55954797132382.76783.84.112.160206442802.07883.24.412.4150299472032.41983.14.412.56004744145033.061080.24.515.3150303872792.401180.44.115.56004681156973.351289.68.02.460197739101.981389.87.92.3150283162122.191489.28.22.66053862110982.871589.88.44.860192839022.021686.58.45.1150292663372.171786.38.55.26204613120192.611884.28.17.760200340252...

example a

[0153] Middle distillate used: LGO, The Netherlands, CP=1.7° C., CFPP=−1° C., 25% n-paraffins, 90−20=70° C.

[0154] Dosage of the additives: 1500 ppm

TABLE 5AdditiveCFPP [° C.]Polymer No. 2−15Polymer No. 3−15Polymer No. 6−15Polymer No. 13−14Polymer No. 16−13Polymer No. 17−16Comparative product A−7Comparative product B−10Comparative product C−6Comparative product D−10

example b

[0155] Middle distillate used: diesel, Belgium, CP=−17° C., CFPP=−19° C., 19% n-paraffins, 90−20=89° C.

[0156] Dosage of the additives: 300 ppm

TABLE 6AdditiveCFPP [° C.]Polymer No. 5−25Polymer No. 16−25Comparative product A−23Comparative product B−23Comparative product C−24Comparative product D−23

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Abstract

The use is described of polymers which contain, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. In addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

Description

DESCRIPTION [0001] The invention relates to the use of polymers which contain, in copolymerized form, an α-olefin, a vinyl ester and an ester of an α,β-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuels; to the fuel oils and lubricants additized with these polymers; and to additive packages comprising such polymers. PRIOR ART [0002] On temperature reduction, mineral oils comprising paraffinic waxes, such as middle distillates, diesel and heating oils, exhibit a distinct deterioration in the flow properties. The cause of this is the crystallization occurring from the cloud point temperature of relatively long-chain paraffins which form large, platelet-shaped wax crystals. These wax crystals have a spongelike structure and lead to inclusion of other fuel constituents in the crystal structure. The occurrence of these crystals leads rapidly to clogging of fuel filters both in tanks and in motor vehicles. At temperat...

Claims

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Application Information

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IPC IPC(8): C10L1/18
CPCC10L1/1973C10L10/14C10L10/16C10M145/14C10M2209/084C10N2230/08C10N2030/08
Inventor AHLERS, WOLFGANGFECHTENKOTTER, ANDREASMAHLING, FRANK-OLAFTROTSCH-SCHALLER, IRENEEISENBEIS, ANSGAR
Owner BASF AG
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