EP0045342B1 - Composition de combustible ayant un écoulement amélioré à basses températures - Google Patents

Composition de combustible ayant un écoulement amélioré à basses températures Download PDF

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Publication number
EP0045342B1
EP0045342B1 EP80890087A EP80890087A EP0045342B1 EP 0045342 B1 EP0045342 B1 EP 0045342B1 EP 80890087 A EP80890087 A EP 80890087A EP 80890087 A EP80890087 A EP 80890087A EP 0045342 B1 EP0045342 B1 EP 0045342B1
Authority
EP
European Patent Office
Prior art keywords
fuel composition
ethylene
vinyl acetate
weight
copolymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80890087A
Other languages
German (de)
English (en)
Other versions
EP0045342A1 (fr
Inventor
Wolfgang Dr. Nette
Hiltrud Dr. Täubert
Leo Dipl. Chem. Schlemmer
Manfred Dipl. Chem. Gebauer
Gerhard Uhlig
Jürgen Dr. Welker
Lutz Dipl. Chem. Döscher
Konrad Dr. Bormann
Günter Dipl. Ing. Stirnal
Heinz Dipl. Chem. Limmer
Annelies Dipl. Chem. Gerstmeyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leuna Werke GmbH
Leuna Werke Walter Ulbright Germany VEB
Original Assignee
Leuna Werke GmbH
Leuna Werke Walter Ulbright Germany VEB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8187506&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0045342(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Leuna Werke GmbH, Leuna Werke Walter Ulbright Germany VEB filed Critical Leuna Werke GmbH
Priority to AT80890087T priority Critical patent/ATE5599T1/de
Priority to DE8080890087T priority patent/DE3065883D1/de
Priority to EP80890087A priority patent/EP0045342B1/fr
Publication of EP0045342A1 publication Critical patent/EP0045342A1/fr
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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
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/192—Macromolecular compounds
    • C10L1/195—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C10L1/197—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid
    • C10L1/1973—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derived from monomers containing a carbon-to-carbon unsaturated bond and an acyloxy group of a saturated carboxylic or carbonic acid mono-carboxylic

Definitions

  • the present invention relates to heating or fuel mixtures, in particular middle distillates, with an addition of polymers which improves the fluidity of the mixture at low temperatures.
  • paraffins contained in the middle distillates are suitable for installation and precipitate at low temperatures, gradually agglomerate into larger structures and ultimately reduce the flow and pumpability as well as the filterability, so that the Use of the oils is restricted.
  • ethylene copolymers especially ethylene / vinyl acetate copolymers, as flow improvers for middle distillates in the concentration range 0.001 to 1 mass%, the average molecular mass from 500 to 50040 and the comonomer content from 1 to 60 mass% is generally known (DE-C No. 1147799, DE-A No. 1162630, DE-B No. 1645873, DE-A No. 2227786).
  • the compounds used as inoculants have a molecular weight of 500 to 30,000 and preferably 500 to 10,000 and the compounds used as crystallization inhibitors have a molecular weight of 1200 to 20,000 and preferably 1200 to 6000.
  • various copolymers of ethylene and vinyl acetate are used, the ratio between the concentration of the vinyl acetate and the molecular weight of the copolymer being particularly important.
  • the object of the invention is to improve the low-temperature behavior of heating or fuel mixtures by adding special polymers, the presence of which improves the fluidity and pumpability at low temperatures.
  • a fuel composition with improved fluidity at low temperatures consisting of heating or propellants with a boiling range above 453 K and of ethylene copolymers that the fuel composition has 0.001 to 0.5% by weight of an ethylene copolymer with a medium Molecular mass (number average) of 500 to 5000, preferably 1000 to 3500, and a comonomer content of 25 to 60 wt .-% contains, has 3 to 10 long chain branches per 10 4 carbon atoms.
  • the long chain branches have a chain length of at least 100 carbon atoms and are sometimes considerably longer. This clearly distinguishes them from the short chain branches known from other flow improvers, which preferably consist of methyl groups.
  • Ethylene-vinyl acetate copolymers with an average molecular weight (number average) of 1000 to 3500, a vinyl acetate content of 35 to 50% by weight and 4 to 8 long-chain branches per 10 4 carbon atoms have proven to be particularly suitable. These copolymers show good dissolution behavior in most aromatic solvents, so that the additives can be added both in the form of a concentrate in an aromatic solvent or solvent mixture and directly in the fuel.
  • copolymers show hardly any impairment of the action due to repeated cooling and heating, since they show good dissolution behavior.
  • the ethylene / vinyl acetate copolymers used according to the invention have both the necessary polymethylene segments which are interrupted by the vinyl acetate units but can be incorporated into the lattice of the wax crystals at the defects, and also have voluminous groups due to the long chain branches, the further installation of the paraf contained in the middle distillates fine at the defects of the lattice and thus reduce further crystal growth.
  • Photomicrographs of wax crystals deposited under extreme conditions of the untrimmed starting diesel fuel and of the diesel fuel mixed with the ethylene / vinyl acetate copolymers according to the invention showed that the addition of the ethylene / vinyl acetate copolymer significantly displaced the deposition of the waxes as a sponge-like mass or platelet-shaped crystals, so that the size of the wax crystals that form is reduced by 40 to 60%.
  • the ethylene / vinyl acetate copolymer used can be provided with further large, space-filling substituents by esterification with 2-ethylhexyl acrylic, isobutyl acrylic, lauryl acrylic and phthalic acid.
  • a diesel fuel with a boiling range of 473 to 628 K, a pour point of 261 K and a CFPP of 266 K was used.
  • an ethylene / vinyl acetate copolymer having a vinyl acetate content of 38 mass% of a number average molecular weight of 2650 and 5 long chain branches per 10 4 C atoms was added in the form of a solution. The following results were obtained:
  • a diesel fuel with a boiling range of 471 to 615 K, a pour point of 269 K and a CFPP of 267 K was used.
  • An ethylene / vinyl acetate copolymer with a vinyl acetate content of 44% by mass, a number average molecular weight of 1870 and 8 long chain branches per 10 4 C atoms was added to this fuel in the form of a solution. The following results were obtained:
  • a heating oil HE-D (according to TGL 3667) with a pour point of 286 K was added an ethylene / vinyl acetate copolymer with a vinyl acetate content of 44 mass%, a number average molecular mass of 1870 and 8 long chain branches per 10 4 C atoms. The following results were obtained:

Claims (4)

1. Composition de combustible ayant un écoulement amélioré à basses températures, composée de combustibles ou de mazouts de chauffage avec une gamme d'ébullition supérieure à 453 K et contenant des copolymères de l'éthylène, caractérisée en ce que la composition de combustible contient 0,001 à 0,5% en poids d'un copolymère de l'éthylène d'un poids moléculaire moyen compris entre 500 et 5000, de préférence entre 1000 et 3500, et de 25 à 60% en poids d'un comonomère, comprenant 3 à 10 ramifications à longue chaîne pour 104 atomes de carbone.
2. Composition de combustible suivant la revendication 1, caractérisée en ce que le comonomère est un ester vinylique et en particulier de l'acétate de vinyle.
3. Composition de combustible suivant les revendications 1 et 2, caractérisée en ce que le copolymère d'éthylène et d'acétate de vinyle contient, par suite d'une estérification par l'acide éthyl-2-hexylacrylique, l'acide isobutylacrylique, l'acide laurylacrylique ou l'acide phtalique, d'autres substituants volumineux.
4. Composition de combustible suivant les revendications 1, 2 et 3, caractérisée en ce qu'elle contient d'autres agents efficaces pour abaisser le point de colmatage du filtre froid, comme antioxy- gènes, comme inhibiteurs de la formation de résidus ou de boues et comme agents de dispersion des boues.
EP80890087A 1980-07-31 1980-07-31 Composition de combustible ayant un écoulement amélioré à basses températures Expired EP0045342B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT80890087T ATE5599T1 (de) 1980-07-31 1980-07-31 Kraftstoffzusammensetzung mit verbessertem fliessvermoegen bei tiefen temperaturen.
DE8080890087T DE3065883D1 (en) 1980-07-31 1980-07-31 Fuel composition with particular fluidity at low temperatures
EP80890087A EP0045342B1 (fr) 1980-07-31 1980-07-31 Composition de combustible ayant un écoulement amélioré à basses températures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80890087A EP0045342B1 (fr) 1980-07-31 1980-07-31 Composition de combustible ayant un écoulement amélioré à basses températures

Publications (2)

Publication Number Publication Date
EP0045342A1 EP0045342A1 (fr) 1982-02-10
EP0045342B1 true EP0045342B1 (fr) 1983-12-14

Family

ID=8187506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80890087A Expired EP0045342B1 (fr) 1980-07-31 1980-07-31 Composition de combustible ayant un écoulement amélioré à basses températures

Country Status (3)

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EP (1) EP0045342B1 (fr)
AT (1) ATE5599T1 (fr)
DE (1) DE3065883D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1263663C (fr) * 1984-12-06 1989-12-05 Terpolymeres d'ethylene, d'acetate de vinyle et d'isobutylene, additifs abaissant le point d'ecoulement dans les hydrocarbures distilles
JPS6270488A (ja) * 1985-09-24 1987-03-31 Mitsubishi Petrochem Co Ltd 燃料油添加剤および流動性の改善された燃料油
GB9213909D0 (en) * 1992-06-30 1992-08-12 Exxon Chemical Patents Inc Oil additives and compositions
GB9213870D0 (en) * 1992-06-30 1992-08-12 Exxon Chemical Patents Inc Oil additives and compositions
GB9213904D0 (en) * 1992-06-30 1992-08-12 Exxon Chemical Patents Inc Oil additives and compositions
GB9213827D0 (en) * 1992-06-30 1992-08-12 Exxon Chemical Patents Inc Oil additives and compositions
GB9417670D0 (en) * 1994-09-02 1994-10-19 Exxon Chemical Patents Inc Oil additives, compositions and polymers for use therein
GB9417667D0 (en) * 1994-09-02 1994-10-19 Exxon Chemical Patents Inc Oil additives, compositions and polymers for use therein
US5681359A (en) * 1996-10-22 1997-10-28 Quantum Chemical Corporation Ethylene vinyl acetate and isobutylene terpolymer as a cold flow improver for distillate fuel compositions
US6495495B1 (en) 1999-08-20 2002-12-17 The Lubrizol Corporation Filterability improver

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB968462A (en) * 1961-12-21 1964-09-02 Monsanto Chemicals Reactive resins containing unsaturated groups
DE1914756C3 (de) * 1968-04-01 1985-05-15 Exxon Research and Engineering Co., Linden, N.J. Verwendung von Ethylen-Vinylacetat- Mischpolymerisaten für Erdöl-Destillate
GB1314855A (en) * 1970-06-17 1973-04-26 Monsanto Chemicals Lubricating oil compositions containing viscosity index improvers
US3887610A (en) * 1971-12-09 1975-06-03 Exxon Research Engineering Co Emulsion polymerization of ethylene with chain transfer agents to form copolymers
DE2862158D1 (en) * 1977-12-20 1983-02-17 Ici Plc Crude oil having improved cold flow properties

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Brauer et al.:"Untersuchung zur Charakterisierung von Äthylen-Vinylazetat-Kopolymeren durch Gelchromatographie, Viskosimetrie und osmotisch Messungen", Plaste und Kautschuk 24, Seiten 630-635 (1977) *

Also Published As

Publication number Publication date
EP0045342A1 (fr) 1982-02-10
ATE5599T1 (de) 1983-12-15
DE3065883D1 (en) 1984-01-19

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