EP0597803A1 - Méthode pour purifier des huiles de laminage - Google Patents

Méthode pour purifier des huiles de laminage Download PDF

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Publication number
EP0597803A1
EP0597803A1 EP93810739A EP93810739A EP0597803A1 EP 0597803 A1 EP0597803 A1 EP 0597803A1 EP 93810739 A EP93810739 A EP 93810739A EP 93810739 A EP93810739 A EP 93810739A EP 0597803 A1 EP0597803 A1 EP 0597803A1
Authority
EP
European Patent Office
Prior art keywords
oil
coagulator
rolling
dimer acid
mixture
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.)
Withdrawn
Application number
EP93810739A
Other languages
German (de)
English (en)
Inventor
Rudolf Baur
Hanspeter Krähenbühl
Urs Giger
Emil Merki
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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.)
Filing date
Publication date
Application filed by Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0597803A1 publication Critical patent/EP0597803A1/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/04—Working-up used lubricants to recover useful products ; Cleaning aqueous emulsion based

Definitions

  • the present invention relates to a method for cleaning rolling oils which contain, as dirty oil, abrasion particles from metals which can be processed into strip-shaped semifinished products, in particular light metals.
  • the greater part of the resulting aluminum abrasion is rinsed from the work roll surfaces (roll roughness) by the sprayed rolling oil (coolant and lubricant) into the reflowing rolling oil.
  • These abrasive aluminum particles consist of an oil film that is physisorbed by the Al oxide layer of the metallic particle.
  • the aluminum particles suspended in the rolling oil show an electrostatic surface charge (zeta potential) in the same direction, so that the particles cannot sediment in the normal gravitational field.
  • zeta potential electrostatic surface charge
  • the abrasion particles present as a suspension in the foil rolling oil show a characteristic distribution which is dependent on the diameter of the particles.
  • the total amount of wear particles in the rolling oil is traditionally determined as an oxide ash. This determination can be carried out gravimetrically (DIN-EN 7) or photometrically (% g / g).
  • a conventional method for cleaning rolling oils is solid / liquid filtration.
  • the Schneider filter is particularly preferred.
  • This fully automatic system a horizontally operating multi-chamber vacuum plate filter, consumes large amounts of filter paper tape and filter aids (sands, organic absorbents).
  • the object of the present invention is to overcome these disadvantages and to provide a process which enables complete coagulation and thus complete separation of the metal debris from the rolling oils and does not require aqueous coagulants.
  • this is achieved by adding 2 to 8 g of dimer acid per 1000 g of dirty oil to the dirty oil and passing the mixture through a coagulator.
  • the dimer acid is the dimerization product of oleic acid.
  • the dimers of oleic acid can be produced, for example, by thermal polymerization or clay-catalyzed polymerization.
  • the dimer acids are also referred to as polymerized fatty acids and have an acid number (mg KOH / g) of e.g. 191 to 198 and a saponification number (mg KOH / g) from 195 to 205.
  • the dimers can also contain so-called intermediates (also called 1.5 mer) and / or trimers or can also consist of trimers.
  • the dimer acid is preferably added in amounts of 2 to 5 g, preferably 2 g, of dimer acid per 1000 g of dirty oil.
  • dimer acid for example as 10 to 50%, expediently as 25%, dimer acid (weight / volume) dissolved in base oil is used.
  • Fresh or cleaned rolling oil is referred to as base oil.
  • the method according to the invention is advantageously suitable for cleaning dirty oils which arise from the rolling oils in the production of metal foils, such as aluminum foils. Accordingly, the method is particularly suitable for foil rolling oil cleaning and thereby for foil rolling oil cleaning from the method of rolling aluminum foils.
  • the method can be explained in more detail using the machine arrangement shown in FIG. 1 as an example.
  • the dirty oil is continuously removed from a storage container (1) and transferred to the coagulator (3) via the feed line (2).
  • the dimer is located in a storage container (4), for example as a 25% solution of dimers in the base oil (weight / volume).
  • the dimer mixes with the dirty oil and is fed to the coagulator (3) with a decanter centrifuge, the fine dust coagulating and the coagulate being discharged from the coagulator (3) into a collecting container (5).
  • the pre-cleaned dirty oil can then be fed via the line (7) into a chamber centrifuge (8).
  • the remaining coagulate residues are safely removed in the chamber centrifuge (8).
  • the arrows (9) indicate the sludge residues from coagulate.
  • the cleaned rolling oil can be returned to the rolling mill or an intermediate storage tank via line (11).
  • the positions (6) and (10) show exemplary attached measuring points at which samples can be taken for analysis.
  • a vacuum plate filter can also be provided instead of the chamber centrifuge (8).
  • Vacuum plate filters can be used with the help of paper filters and filter aids, e.g. Sand.
  • the mixture of dirty oil and dimer acid is fed to a coagulator.
  • the mixture is passed through a coagulator and then through a centrifuge.
  • the mixture is passed through a coagulator with a decanter centrifuge. In a preferred embodiment, the mixture is then treated in a chamber centrifuge.
  • the mixture is particularly preferably treated in a coagulator with a decanter centrifuge and then in a chamber centrifuge.
  • the process according to the invention is carried out at temperatures of, for example, 60 to 100 ° C. and preferably at 90 ° C.
  • the present method can be operated in a rolling oil main or secondary flow. If the process is operated in the main stream, the system components, e.g. the coagulator can be sized accordingly.
  • a degree of rolling oil cleaning measured by the oxide ash content according to DIN-EN7, of equal to or less than 0.01% can be achieved.
  • the residues contain only metal debris, such as aluminum debris and rolling oil. As a rule, about 1.3 kg of waste is generated per 1000 l of rolling oil. This waste can be destroyed by incineration, and there are about 350 g Al2O3 per 1000 l of treated rolling oil.
  • the precipitant in the present physical coagulation is from the coagulating metal, e.g. Aluminum abrasion is completely absorbed and does not get into the rolling oil.
  • control measures can be taken in that the output photometer cell of the coagulator blocks the cell flow of the coagulant when the signal of complete coagulation is given.
  • 12 l / min of dirty oil are removed from a storage tank with a capacity of 2000 l.
  • the dirty oil has a temperature of 90 ° C.
  • 0.025 l / min dimers dissolved in base oil (25% weight / volume) are added to the dirty oil and treated first in a coagulator with a decanter centrifuge, then in a chamber centrifuge. Samples are taken at points (6) and (10) according to FIG. 1.
  • the following table shows the measured values.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
EP93810739A 1992-11-10 1993-10-21 Méthode pour purifier des huiles de laminage Withdrawn EP0597803A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3470/92A CH684410A5 (de) 1992-11-10 1992-11-10 Verfahren zum Reinigen von Walzölen.
CH3470/92 1992-11-10

Publications (1)

Publication Number Publication Date
EP0597803A1 true EP0597803A1 (fr) 1994-05-18

Family

ID=4256659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810739A Withdrawn EP0597803A1 (fr) 1992-11-10 1993-10-21 Méthode pour purifier des huiles de laminage

Country Status (4)

Country Link
US (1) US5332510A (fr)
EP (1) EP0597803A1 (fr)
CA (1) CA2109495A1 (fr)
CH (1) CH684410A5 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021946A1 (fr) * 1997-10-29 1999-05-06 Metallgesellschaft Aktiengesellschaft Regeneration de residus de lubrifiants reactionnels acides
DE19905817A1 (de) * 1999-02-12 2000-08-31 Achenbach Buschhuetten Gmbh Verfahren für die Aufbereitung und die Konditionierung von im Kreislauf gefahrenem Walzöl
DE102007028737A1 (de) 2007-06-21 2008-12-24 Ulrich Georg Hammer Verfahren und Vorrichtung zur Aufbereitung von Walzöl

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645945B4 (de) * 1996-11-07 2005-02-03 Hubertus Dipl.-Ing. Meyer Verfahren zum Aufbereiten von bei der Metallbearbeitung eingesetzten Bearbeitungsölen
DE10011513A1 (de) * 2000-03-09 2001-09-20 Fraunhofer Ges Forschung Verfahren zum Aufbereiten einer gebrauchten Schneidsuspension
CN113201393B (zh) * 2021-05-31 2022-11-29 内蒙古联晟新能源材料有限公司 一种环保型无公害的铝卷轧制油回收系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631979A (en) * 1950-08-30 1953-03-17 Standard Oil Dev Co Rust inhibiting composition
US3450627A (en) * 1967-08-10 1969-06-17 Nalco Chemical Co Purifying used metalworking lubricating oils
DE2613878A1 (de) * 1975-04-10 1976-10-21 Alusuisse Reinigungsverfahren fuer walzoele
DE3342372A1 (de) * 1982-12-13 1984-06-14 Sulzer-Escher Wyss AG, Zürich Verfahren und vorrichtung zur reinigung von walzoel, insbesondere zur verwendung zum leichtmetall-walzen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095368A (en) * 1957-07-31 1963-06-25 Exxon Research Engineering Co Process for removing metallic contaminants from oils
US3523895A (en) * 1969-04-21 1970-08-11 Mobil Oil Corp Metal working lubricant
AU533444B2 (en) * 1978-09-28 1983-11-24 Salusinszky, A.L. Regeneration of used lubricating oils
US4287049A (en) * 1980-02-05 1981-09-01 Phillips Petroleum Co. Reclaiming used lubricating oils with ammonium salts and polyhydroxy compounds
US4522729A (en) * 1984-07-30 1985-06-11 Phillips Petroleum Company Filtration of oil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631979A (en) * 1950-08-30 1953-03-17 Standard Oil Dev Co Rust inhibiting composition
US3450627A (en) * 1967-08-10 1969-06-17 Nalco Chemical Co Purifying used metalworking lubricating oils
DE2613878A1 (de) * 1975-04-10 1976-10-21 Alusuisse Reinigungsverfahren fuer walzoele
DE3342372A1 (de) * 1982-12-13 1984-06-14 Sulzer-Escher Wyss AG, Zürich Verfahren und vorrichtung zur reinigung von walzoel, insbesondere zur verwendung zum leichtmetall-walzen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021946A1 (fr) * 1997-10-29 1999-05-06 Metallgesellschaft Aktiengesellschaft Regeneration de residus de lubrifiants reactionnels acides
US6479439B1 (en) 1997-10-29 2002-11-12 Metallgesellschaft Aktiengesellschaft Regenerator of acid reaction lubricant residues
DE19905817A1 (de) * 1999-02-12 2000-08-31 Achenbach Buschhuetten Gmbh Verfahren für die Aufbereitung und die Konditionierung von im Kreislauf gefahrenem Walzöl
DE19905817C2 (de) * 1999-02-12 2003-06-18 Achenbach Buschhuetten Gmbh Verfahren für die Aufbereitung und die Konditionierung von im Kreislauf gefahrenem Walzöl
DE102007028737A1 (de) 2007-06-21 2008-12-24 Ulrich Georg Hammer Verfahren und Vorrichtung zur Aufbereitung von Walzöl

Also Published As

Publication number Publication date
CH684410A5 (de) 1994-09-15
CA2109495A1 (fr) 1994-05-11
US5332510A (en) 1994-07-26

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