EP0572630B1 - Procede de regeneration d'huiles lubrifiantes usees - Google Patents

Procede de regeneration d'huiles lubrifiantes usees Download PDF

Info

Publication number
EP0572630B1
EP0572630B1 EP93901602A EP93901602A EP0572630B1 EP 0572630 B1 EP0572630 B1 EP 0572630B1 EP 93901602 A EP93901602 A EP 93901602A EP 93901602 A EP93901602 A EP 93901602A EP 0572630 B1 EP0572630 B1 EP 0572630B1
Authority
EP
European Patent Office
Prior art keywords
oil
bleaching earth
oils
waste oil
waste
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 - Lifetime
Application number
EP93901602A
Other languages
German (de)
English (en)
Other versions
EP0572630A1 (fr
Inventor
Dieter Winkler
Harald Allhorn
Hartmut Hammer
Hermann HÖVER
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.)
RWE Entsorgung AG
Original Assignee
RWE Entsorgung AG
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 RWE Entsorgung AG filed Critical RWE Entsorgung AG
Publication of EP0572630A1 publication Critical patent/EP0572630A1/fr
Application granted granted Critical
Publication of EP0572630B1 publication Critical patent/EP0572630B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C10M175/0008—Working-up used lubricants to recover useful products ; Cleaning with the use of adsorbentia
    • 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
    • C10M175/0025—Working-up used lubricants to recover useful products ; Cleaning by thermal processes
    • C10M175/0033—Working-up used lubricants to recover useful products ; Cleaning by thermal processes using distillation processes; devices therefor

Definitions

  • the present invention relates to a method for cleaning used Lubricating oils through vacuum distillation and two post-treatments of the lubricating oil distillate with finely divided, not activated Bleaching earth at 260 to 350 ° C.
  • Lubricating oils are also produced which contain synthetic parts or only for special purposes consist of synthetic base oils.
  • Waste oil must be disposed of properly in the Federal Republic of Germany, whereby according to the new waste law from 1.11.1986 the waste oil owner for the proper disposal is your own responsibility.
  • the waste oil owner for the proper disposal is your own responsibility.
  • For the end user engine oil and other lubricating oils have a right of free Return of used oils to the lubricating oil supplier.
  • the material recycling The disposal of used oil is in the foreground. This means that by means of suitable processes from the used oil again lubricant base oil (Second refinery), the quality of which is obtained from crude oil lubricant base oil produced.
  • waste oil is processed in the way that the waste oil is collected by collecting companies, for example Engine, hydraulic and gear oil are collected separately must be from types of oil such. B. metalworking oil.
  • the collecting company delivers the waste oil to waste oil regeneration plants, so-called Second refining plants.
  • Second refining plants only Used oils are processed that do not contain more than 0.2 wt .-% chlorine Contain more than 4 ppm polychlorinated biphenyls.
  • the second refining process is the re-refining with more concentrated Sulfuric acid and bleaching earth.
  • the waste oil is first freed from low boilers and water by distillation and then distilled over in vacuo.
  • the distillate comes with concentrated sulfuric acid treated.
  • the product treated in this way becomes the so-called spindle oil is distilled off over activated bleaching earth.
  • Subsequently can be a purely adsorptive aftertreatment with activated Bleaching earth at approx. 120 ° C (see eg "Waste oil recycling, Klaus Müller, Erich Schmidt Verlag, Berlin, Bielefeld, page 104).
  • the sulfuric acid / bleaching earth process has one considerable disadvantage that there is a so-called acid resin, a product that occurs when treating the waste oil with concentrated sulfuric acid settles as a difficult phase, cannot be deposited and is difficult to dispose of is.
  • spent, loaded with sulfuric acid Bleaching earth in considerable quantities, which is also difficult to dispose of.
  • the waste oil is first mixed with a finely divided metallic Sodium reacted and then also distilled over in vacuo.
  • This process also requires chemical treatment but instead of concentrated sulfuric acid highly reactive fine distributed, metallic sodium is used.
  • the waste oil is first mixed with a diammonium phosphate solution transferred.
  • water and volatile hydrocarbons removed by distillation. Now with activated bleaching earth treated. This is followed by a hydrating one Refining.
  • Bleaching earth has long been used to clean used oils.
  • the bleaching earths are water-containing aluminum-magnesium silicates from the bentonite group, which are activated by boiling in hydrochloric acid; this dissolves soluble, basic fractions, such as CaO, MgO and also Fe 2 O 3, from the raw material and exposes the actual capillary structure of the adsorption material. They are also referred to as Walker, Fuller Florida earth or bentonite (Klaus Müller, waste oil recycling, Erich Schmidt Verlag GmbH, Berlin, 1982, page 96).
  • GB-A-327,294 describes a process for refining used lubricating oils, according to which is treated with sulfuric acid after removal of water. Subsequently the oil is separated off, distilled in vacuo and with an adsorbent, preferably treated with Fuller soil.
  • DE-OS 37 38 391 describes a process for evaporating waste oil under vacuum a special, complicated evaporation apparatus. The procedure exists from two stages. The second stage is the evaporation of gas oil and spindle oil described over bleaching earth under vacuum. From the. Distillation bottoms are obtained after Filter off the actual lubricating oil from the bleaching earth. A similar process is known from the application FR-A-2 322 918, being used as an adsorbent acid-activated and / or neutral bleaching earth is used.
  • DD-PS 77553 describes a thermal pretreatment of waste oil before the hydrogenation Refining described. The filtration aid can be used before or after the heat treatment Bleaching earth can be added.
  • the process consists of the cleaning of used oils by vacuum distillation, after-treatment with finely divided solids and subsequent separation of the solids, characterized in that the distilled oil in 2 stages with a total of 4 to 20 wt .-%, preferably 6 to 16 wt .-% with natural, untreated Bentonite-type bleaching earth in the temperature range from 280 to 330 ° C during a residence time of 5 to 120 min. is mixed thoroughly and then the Solid is separated.
  • the low-boiling parts in the waste oil namely the low-boiling hydrocarbons and the water still present in the waste oil is distilled off.
  • This can be done under Normal pressure take place, for example at a bottom temperature of about 160 ° C.
  • One can however, also work under a slight vacuum, for example at 40 to 100 mbar.
  • you can also use the medium oil and the spindle oil, i.e. the light lubricating oil fraction Remove by distillation in vacuo, at about 5 to 10 mbar and a bottom temperature of 210 ° C.
  • the vacuum distillation apparatus be performed.
  • Several distillation columns are known in where lubricating oil can be gently distilled, e.g. short-path evaporators and thin film evaporators.
  • the vacuum is generally from 0.01 mbar to 20 mbar, preferably at 0.05 to 10 mbar.
  • the spindle oil In the event that the spindle oil is not separated as already described, it can also be distilled off in another way. This can be done, for example, in such a way that one Vacuum distillation column, the spindle oil is distilled off overhead and the actual one Lube oil in the side trigger. However, the separation can also be carried out in such a way that in one column of spindle oil is separated by distillation and in another the actual one Lubricating oil.
  • spindle oil is not used as an engine lubricating oil, but is used mainly used in hydraulic oils.
  • the broad boiling range for lubricating oil lies between 350 ° C and 640 ° C, but there are also fractions with others Boiling ranges or viscosities distilled off, e.g. between 360 and 540 ° C or 390 and 515 ° C. Lubricator win distillation cuts in such a way that for certain Applications required boiling analysis or viscosity is observed.
  • the lubricating oil obtained by vacuum distillation is now used according to the invention in a mixing apparatus discontinuously or continuously with fine distributed, not activated bleaching earth in two stages and at 280 to 330 ° C, during a dwell time of 5 to 120 min., preferably intimately mixed from 10 to 70 min. Subsequently the solid is separated off in each case.
  • Different temperatures can also be used in the two treatment stages and residence times in the areas mentioned.
  • Montmorillonite is known a major mineral of bentonite.
  • Minerals also include mixtures with beidellite (smectite), nontronite, saponite or hectorite. Further can be present iron oxides such. B. hematite.
  • the treatment is carried out with non-activated bleaching earth two-stage.
  • the inventive method can of course also in more than two stages are carried out, however, the skilled person will do this from an economic point of view Avoid reasons if possible.
  • One of the stages can also include adding non-activated bleaching earth a distillation column, provided that the additives and impurities containing sump has been removed. Furthermore falls in the invention Frame also the partial addition of activated bleaching earth, although those skilled in the art will refrain from doing so for economic reasons.
  • the grain size of the bleaching earth used is not decisive Roll, but finely ground materials are preferred, for example from 30 to 60 mesh.
  • the solids are in one wide grain size range, such as between 0.001 mm up to 1 mm or more, with a very fine distribution the residence time in general can be reduced and the amounts of added solid.
  • the specialist has a wide range of options for selecting the grain size.
  • the desired grain sizes according to the invention can also be smaller than the grain sizes mentioned Develop properties.
  • any mixing vessels of the prior art can be used as mixing vessels will.
  • the mixing devices can work continuously or discontinuously. So can be used up to mixing cascades, simple mixing tanks, Intensive stirring reactors, built-in mixing sections and numerous other.
  • the specialist is free to do so depending on the a suitable plant size and other criteria Select mixing device. It is essential, however, that an intimate Contact between the waste oil to be cleaned and the solids used is achieved.
  • Table 1 shows results according to the invention when cleaning three different ones Used oils I, II and III compiled. Are for comparison Analyzes and data of a typical waste oil compared.
  • the table shows that excellent by the inventive method Values can be obtained regarding color, viscosity index, flash point, Ash, neutralization numbers, chlorine and phosphorus.
  • the used Waste oils I, II and III have been taken over by various waste oil collectors.
  • the Waste oil quality corresponds to that prescribed by law regarding chlorine and PCB content is mandatory.
  • the reference old oil is a typical one Waste oil in the same category as waste oils I, II and III.
  • lubricating oil data from used oil distillates are different Viscosities at 40 ° C and 100 ° C summarized.
  • Under EP are data from used waste oil specified. It is a French waste oil. Distillates 1 and 2 were each once and twice with 6 wt .-% each non-activated bleaching earth at 320 ° C and a dwell time of 30 min each treated.
  • Table 5 summarizes results from the treatment of a distillation cut from 390 to 515 ° C from a Spanish waste oil from the Barcelona area.
  • a Spanish, non-activated, bentonite-based bleaching earth which contained saponite and 2 to 3% by weight of hematite was used as the bleaching earth.
  • Sample a) is the untreated cut.
  • Sample b) is the cut once treated with 6% by weight of bleaching earth at 320 ° C. and 30 minutes. The neutralization number is not satisfactory. However, very good values are obtained when treated twice (sample c). Analogously, 8% by weight of bleaching earth was used in samples d) and e).
  • Sample f) was treated once with 8% by weight of bleaching earth, which was obtained from the 2nd treatment stage after filtering off. Neither color number nor neutralization number are satisfactory.
  • Sample g) was treated in the first stage like sample f) and in stage 2 with 8% by weight of fresh bleaching earth. The values obtained are very good. This means that when using fresh bleaching earth in stage 2 and bleaching earth filtered off in stage 2, very good values are obtained. Good results were also obtained with this procedure with 4 and 6% by weight of bleaching earth. In general, the overall consumption of bleaching earth can be reduced accordingly.
  • the figure shows an example of a process flow diagram with two solids cleaning stages shown.
  • Waste oil flows over filter 1 to remove coarse impurities.
  • the filtered waste oil flows into stripping column 3, from which a mixture of low-boiling hydrocarbons and water is distilled off at the top.
  • separation tank 5 the water flows out of the system via 6, while the low-boiling hydrocarbons are collected in tank 7.
  • the bottom from 3 flows into vacuum column 4, in which lubricating oil is distilled off overhead. 4 can also be operated in such a way that spindle oil is removed overhead and the actual lubricating oil is drawn off in the side draw.
  • used lubricating oils can, as explained in detail mineral base, which can also contain synthetic oils and synthetic Lubricating oils based on hydrocarbons again to a flawless Second raffinate to be worked up.
  • the present invention overcomes the prejudice of the person skilled in the art that when using bleaching earth for cleaning used oil distillates, portions such as CaO, MgO or Fe 2 O 3 have to be removed from the raw material in order to expose the capillary structure of the bleaching earth. Rather, the results according to the invention show that these proportions are even advantageous under the conditions according to the invention.

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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lubricants (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Claims (2)

  1. Procédé pour la purification des huiles usés par distillation sous vide, traitement supplémentaire avec des solides distribués fins et suivant la séparation des solides, caractérisé en ce que l'huile distillé est mélangé intense avec de tots ensemble 4 à 20 pour-cent de poids et de préférence de 6 à 16 pour-cent de poids de terre décolorante naturele et non-pretraitée du type bentonite, la température étant comprise entre 180 à 330°C à une durée de 5 à 120 minutes et ent ce que saivant les solides sont séparés.
  2. Procédé selon la revendication 1, caractérisé en ce quelle traitement avec la terre décolorante a une durée de 10 à 70 minutes.
EP93901602A 1991-12-23 1992-12-21 Procede de regeneration d'huiles lubrifiantes usees Expired - Lifetime EP0572630B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4142829 1991-12-23
DE4142829A DE4142829C2 (de) 1991-12-23 1991-12-23 Verfahren zur Reinigung von gebrauchten Schmierölen
PCT/DE1992/001074 WO1993013189A1 (fr) 1991-12-23 1992-12-21 Procede de regeneration d'huiles lubrifiantes usees

Publications (2)

Publication Number Publication Date
EP0572630A1 EP0572630A1 (fr) 1993-12-08
EP0572630B1 true EP0572630B1 (fr) 1998-09-02

Family

ID=6448047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93901602A Expired - Lifetime EP0572630B1 (fr) 1991-12-23 1992-12-21 Procede de regeneration d'huiles lubrifiantes usees

Country Status (8)

Country Link
EP (1) EP0572630B1 (fr)
JP (1) JPH06510562A (fr)
AT (1) ATE170548T1 (fr)
BR (1) BR9205666A (fr)
CA (1) CA2104578A1 (fr)
DE (2) DE4142829C2 (fr)
NO (1) NO932937D0 (fr)
WO (1) WO1993013189A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757873B1 (fr) * 1996-12-31 1999-03-19 Total Raffinage Distribution Procede de regeneration d'une fraction d'huile lubrifiante usee
EP0926226A1 (fr) * 1997-12-22 1999-06-30 C.S. Filtration S.p.r.l. Filtration d'huiles synthétiques par produit silico-calcaire
US20030024856A1 (en) * 2001-03-26 2003-02-06 Phil Surana Method for removal of oder from poly alpha-olefins

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB327294A (en) * 1929-04-10 1930-04-03 William Detwiller Harris Method of refining used lubricating oil
US2286369A (en) * 1931-01-02 1942-06-16 Bocji Corp Method of purifying oil
US2012695A (en) * 1933-03-24 1935-08-27 Quigley Co Apparatus for reclaiming crank-case oil
US2401339A (en) * 1941-11-26 1946-06-04 Buckeye Lab Corp Treatment of oils and waxes
US2446489A (en) * 1945-03-21 1948-08-03 Shell Dev Process for regenerating spent internal-combustion engine lubricating oils
US2496888A (en) * 1947-01-22 1950-02-07 De Witt H Palmer Oil reconditioning or clarifying apparatus
DE1545267A1 (de) * 1966-05-26 1969-12-11 Durbanolwerk Hans Durban Kg Vorrichtung zur Raffination von Motoren- und Motorenaltoelen
US4101414A (en) * 1975-09-02 1978-07-18 Unitech Chemical Inc. Rerefining of used motor oils
DE3738391A1 (de) * 1987-11-12 1989-05-24 Wilhelm Joachim A Dr Ing Verfahren zum destillativen entfernen von verunreinigungen aus altoel

Also Published As

Publication number Publication date
NO932937L (no) 1993-08-18
DE59209484D1 (de) 1998-10-08
DE4142829C2 (de) 1994-08-25
NO932937D0 (no) 1993-08-18
WO1993013189A1 (fr) 1993-07-08
JPH06510562A (ja) 1994-11-24
ATE170548T1 (de) 1998-09-15
BR9205666A (pt) 1994-05-17
EP0572630A1 (fr) 1993-12-08
DE4142829A1 (de) 1993-06-24
CA2104578A1 (fr) 1993-06-24

Similar Documents

Publication Publication Date Title
EP1141181B1 (fr) Procede de retraitement d'huiles usees
DE69513669T2 (de) Verfahren zur beseitigung von überwiegend naphtensäure aus mineralöl
DE69631901T2 (de) Verfahren zur verminderung der korrosivität und acidität von rohöl
DE2818366A1 (de) Verfahren zur herstellung von schmieroel aus gebrauchtem abfallschmieroel
CH634344A5 (de) Verfahren zum stabilisieren organischer verbindungen gegen autoxydation.
DE2408240A1 (de) Verfahren und anlage zur aufarbeitung von altoelen
DE69414699T2 (de) Verfahren und vorrichtung zur aufbereitung von schmierölen
DE3723607A1 (de) Verfahren zum hydrierenden aufarbeiten von altoelen
DE3116470A1 (de) "behandlungs-insbesondere zurueckgewinnungsverfahren fuer altoelprodukte"
DE69612978T2 (de) Verfahren zum raffinieren von verbrauchten schmierölen durch alkalibehandlung.
DE3405858C2 (de) Verfahren zur Wiederaufbereitung von Altölen
EP0572630B1 (fr) Procede de regeneration d'huiles lubrifiantes usees
DE2813200C2 (de) Verfahren zur Wiederaufbereitung von gebrauchten Schmierölen
DE2821159C2 (de) Verfahren zur Herstellung von im wesentlichen aschefreiem Schmieröl
DE2421903C3 (de) Verfahren zum Regenerieren von Altöl
DE3232683A1 (de) Verfahren zur reraffination von altoel
EP0228651B1 (fr) Procédé d'obtention de lubrifiants de haute qualité à partir d'huiles usées
DE944808C (de) Verfahren zum Entfaerben von OElen
DE963986C (de) Verfahren zur Herstellung eines elektrischen Isolieroeles
DE875384C (de) Hochdruckschmieroele
DE961478C (de) Verfahren zum Schutz von Erdoelprodukten gegen Oxydation
DE1545268A1 (de) Verfahren zur Aufbereitung von hochwertigen OElen
DE579032C (de) Verfahren zum Raffinieren von Erdoelprodukten
DE915608C (de) Verfahren zum Stabilisieren von schwefelhaltigen OElen und Fetten
DE19624411A1 (de) Verfahren zur Aufbereitung gebrauchter Hydraulikflüssigkeiten auf der Basis von Glykolethern und Glykoletherboraten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930804

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI NL PT SE

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOEVER, HERMANN

Inventor name: HAMMER, HARTMUT

Inventor name: ALLHORN, HARALD

Inventor name: WINKLER, DIETER

17Q First examination report despatched

Effective date: 19950714

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: RWE ENTSORGUNG AKTIENGESELLSCHAFT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980902

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19980902

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980902

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980902

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980902

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19980902

REF Corresponds to:

Ref document number: 170548

Country of ref document: AT

Date of ref document: 19980915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59209484

Country of ref document: DE

Date of ref document: 19981008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981202

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981202

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981221

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981231

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981231

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19980902

BERE Be: lapsed

Owner name: RWE ENTSORGUNG A.G.

Effective date: 19981231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020228

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030701