EP0341580B1 - Verfahren zur destillativen Reinigung quecksilberhaltiger Stoffe bzw. Stoffgemische - Google Patents

Verfahren zur destillativen Reinigung quecksilberhaltiger Stoffe bzw. Stoffgemische Download PDF

Info

Publication number
EP0341580B1
EP0341580B1 EP89108089A EP89108089A EP0341580B1 EP 0341580 B1 EP0341580 B1 EP 0341580B1 EP 89108089 A EP89108089 A EP 89108089A EP 89108089 A EP89108089 A EP 89108089A EP 0341580 B1 EP0341580 B1 EP 0341580B1
Authority
EP
European Patent Office
Prior art keywords
film evaporator
mercury
suspension
water
thin
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
EP89108089A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0341580A2 (de
EP0341580A3 (en
Inventor
Gerhard Dipl.-Ing. Bernecker
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0341580A2 publication Critical patent/EP0341580A2/de
Publication of EP0341580A3 publication Critical patent/EP0341580A3/de
Application granted granted Critical
Publication of EP0341580B1 publication Critical patent/EP0341580B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B43/00—Obtaining mercury

Definitions

  • the present invention relates to a method for the purification by distillation of mercury-containing substances and / or substance mixtures and / or for the production of mercury.
  • the process is carried out continuously with moving feed material at pressures which are substantially below atmospheric pressure or in a vacuum. This enables low distillation temperatures below 400 ° C, which allows indirect heating of the apparatus.
  • the feed containing mercury is first milled wet and then sprayed as a suspension into a thin-film evaporator, preferably using a rotary atomizer.
  • the sprayed-in suspension is heated on the indirectly heated inner wall of the thin-film evaporator, causing gases and vapors containing mercury to rise.
  • the feed layer adhering to the wall of the thin film evaporator is constantly scraped off by a rotating device.
  • the mercury-containing vapors are removed from the upper area of the thin-film evaporator and passed on to a condensation device, while the solid components of the original suspension are removed from the thin-film vacuum evaporator below.
  • DE-OS 22 10 759 describes a process for the recovery of mercury from aqueous solutions, especially for removing small traces of mercury from an exhausted brine solution which emerges from the electrolytic cells in the mercury process.
  • the solution is treated with a chemical reducing agent, the finely divided or colloidal mercury obtained is removed by steam distillation, the mixed steam is condensed, and the mercury is separated from the condensate.
  • the aim is to reduce the moisture content to approximately 8 to 10% before using the material in the distillation or roasting furnace.
  • residues containing mercury are also dewatered by mechanical separation processes before the mercury is thermally treated on the feed material is removed by distillation; for example, mercury-containing sludges from chlor-alkali electrolysis are reduced to approx. 20 to 45% by weight in the moisture content by filter presses.
  • the known distillation apparatus for the production of mercury or the purification of mercury can be differentiated according to whether and how the feed material is moved during the distillation process.
  • the material is not moved. It rests in one or more layers either directly on the walls of the distillation apparatus or on sheets to which it was previously applied and which are then introduced into the distillation apparatus.
  • These apparatuses are preferably used when fine-grained or powdery material is treated in order to keep the dust discharge low with the vapors and gases which are derived from the distillation apparatus.
  • This known method is a batch operation with the heating of inert masses.
  • the material is moved slightly during the distillation process, but migrates through the distillation apparatus during the process.
  • This principle is preferably used in the smelting of minerals containing mercury, e.g. in shaft furnace with or without internals.
  • a third variant involves moving the material during the distillation process in order to improve mass and heat transfer processes during the distillation process.
  • rotary kilns are known in the prior art. These work by one with its axis horizontally positioned or slightly inclined against the horizontal rotating tube rotates slowly about its axis. As a result, the goods always come into contact with new parts of the wall or, in contrast to a dormant layer, are always exposed to the furnace atmosphere with a different surface.
  • rotary kiln devices are usually loaded and emptied in batch mode. In the case of a slightly inclined arrangement, the material to be treated travels in the direction of inclination of the axis through the rotary kiln, the residence time being determined by the set speed. It is also known to install internals inside the rotary tubes, which are intended to prevent the material from being crushed and to support movements of the material.
  • the distillation furnaces are heated either directly, for example by flames or flue gases, or indirectly via one of the walls, for example by flames or electrically.
  • the introduction of the required heat in indirect heat exchange by condensing steam from a heating medium or by releasing the heat of a heat transfer fluid is technically not possible under economic conditions.
  • Working in a vacuum is known for distillation ovens in which the material is not moved during the distillation process.
  • indirect heating with equipment such as water vapor or heat transfer oil is known. Such heating is desirable because it gives better heat transfer coefficients than heating with gaseous media. Overall, indirect heating is desirable, because with direct heating the amount of exhaust gas increases and the mercury losses increase due to the partial pressure of mercury. This is the main source of loss in mercury smelters. With direct heating, there is also a greater risk of dust being entrained due to higher flow rates in the furnace. There is also a fire risk if mercury-containing activated carbon is to be freed from mercury.
  • Distillation furnaces with essentially static goods have the disadvantage of poor heat and mass transfer. Layers can crust over, especially in the case of fine-grained substances such as activated carbon in powder form. There is no adequate transport mechanism due to the dormant layer of material to create a sufficient partial pressure gradient for mercury. This results in long treatment times in the ovens.
  • the reduction in the water content before introduction into the distillation apparatus should also be considered with regard to dust formation in the distillation apparatus and introduction of dust into the condensation stage. By reducing the water content in the feed, the amount of water evaporating in the still is to be reduced. In the case of directly heated stoves, the amount of flue gas can be kept lower. In the case of indirectly heated ovens, especially those with a stationary material, the oven throughput time can be reduced.
  • ballast masses of steel must be warmed up and cooled for each batch. This is very energy intensive. In addition, due to the sluggish heat transfer processes, only one furnace can be charged in 24 hours. To be sufficient at the prevailing atmospheric pressure To de-quench the material, heating temperatures up to 550 ° C must be achieved. The residual content in the treated goods is in the range of about 20 to 50 mg Hg per kg of material. A further reduction is limited by the lack of mass transfer mechanisms in the atmosphere inside the hood with the resting layer of feed material on the tray trays. The construction is not capable of moving the goods.
  • the emergency vehicle which is pulled out of the oven by muscle power, is then left to cool down further.
  • the liquid mercury which has accumulated in the collecting tube under the emergency vehicle, is drained by gravity in the open river into a collecting vessel, driven by forklift to the collecting container of the Hg filling and drained there.
  • the many open handling of material containing mercury or mercury, sometimes at elevated temperatures, is problematic for occupational safety. There is a problem with the MAK values for Hg at the busy To comply with personnel. After the stack of trays has cooled down on the oven service trolley, the hood is pulled. The tray trays on the emergency vehicles are transported to the emptying site by forklift trucks. The treated material is transferred into transport packaging for the landfill using a vacuum suction system.
  • the present invention has for its object to provide a method for the purification of mercury-containing substances or mixtures of substances by distillation, which enables extensive cleaning of the feed material, is environmentally friendly and does not burden people, which can be operated continuously and which is energy-efficient.
  • This object is achieved according to the invention by a method of the type mentioned at the outset in that the feed material is injected as a solid / liquid suspension or solution into a thin-film evaporator or is atomized or sprayed therein, preferably by a rotary atomizer.
  • Such thin-film evaporators are known according to the prior art described at the outset.
  • Such a vertical thin-film evaporator with indirect wall heating is shown in the literature reference "Chemical Technology” from Winnacker + Küchler, inside which a shaft rotates, on which wipers are attached, which scrape off the feed material from the inner walls of the thin-film evaporator.
  • the one to be evaporated Liquid is introduced into the thin film evaporator at the top and the solid components can be removed at the bottom.
  • the continuous process control offers advantages compared to dormant layers of a batch process.
  • the disadvantages of rotary kilns are thus avoided, in which the good movement results in a greater dust discharge, which leads to a corresponding formation of stumps in the condensation devices.
  • powdery mercury-containing substances or those in which abrasion can easily occur can be used with the method according to the invention. It can e.g. are activated carbons loaded with mercury, which at the same time also contain the carbon that promotes stupp formation.
  • a solid-liquid suspension is produced by the targeted addition of liquid with such a high liquid content in the slurry that the suspension can be sprayed in a thin-film evaporator.
  • the suspension Before being used in the thin-film evaporator, the suspension is wet-ground in order to set an optimal particle size and particle size distribution.
  • the liquid of the sprayed-in suspension has a washing effect on the vapors and gases passing in countercurrent in the upper part of the thin-film evaporator, thus reducing the dust discharge to a tolerable level.
  • a gaseous medium is specifically introduced into the evaporator in order to transport mercury in the part as entraining gas to improve the thin film evaporator in which the suspension has largely evaporated.
  • the equipment rooms for indirect heating can easily be attached to a stationary jacket of a thin-film evaporator.
  • the lower and side part covered with material always causes the heat transfer from the rotating jacket to the material to be treated, with the method according to the invention practically the entire jacket surface is effective as a heat exchange surface when the thin-film evaporator is arranged vertically. Due to the constant peeling of the material layer building up on the jacket by the rotating internals, a smaller layer thickness is also realized on the wall than occurs in the rotary kiln, whereby the heat and mass transfer ratios are further improved.
  • This combination of advantages is made possible by a combination of process features, which is in contrast to the known processes.
  • the thin-film evaporator is designed as a cylindrical container so that its inside length is at least four times as large as the inner diameter and that it has a fixed jacket 3 and a rotating device 4 inside the same.
  • This serves to move and convey the feed material, as well as scraping or scraping the same off the jacket of the thin-film evaporator and to prevent free dropping of the feed material after scraping up to the end of the thin-film evaporator, which is arranged vertically.
  • the rotating device 4 also serves to bring the feed material back into contact with the jacket 3 at another point.
  • the walls of the thin-film evaporator are largely designed as double jackets or are equipped on the outside with welded pipe coils, that the outer wall of the thin-film evaporator is equipped with at least two operating rooms, that the lower temperature level on the operating side is generated by condensing water vapor in the first operating room 5 at a pressure of 2 to 25 bar, preferably 10 to 12 bar - and the higher by heating the operating rooms 6 and 7 with an organic Heat transfer fluid in the temperature range from 250 to 370 ° C, preferably 300 to 350 ° C, that the vacuum generating device, preferably as a water ring pump, is arranged between the first and second condensation stages.
  • an mercury-containing activated carbon suspension is introduced into the thin-film evaporator and freed of mercury by treatment in the manner described and is therefore regenerated for reuse in adsorption processes or can be further disposed of by incineration or landfill without this mercury content be fed.
  • the designs of the walls of the thin-film evaporator are used to keep the jacket temperatures at nominal operation above the dew point of vapors, which are evaporated from the feed material, and as an operating room for vaporous or liquid heating agents for the transfer of the heat of vaporization and the sensible heat in indirect heat exchange to serve the wall of the thin film evaporator to the feed.
  • This liquid content prevents dry dust from being present in the area of the feed zone of the suspension, in which vapors or a gas / vapor mixture are drawn off from the thin-film evaporator, as a result of which a largely mercury-free and liquid-free dry substance is released at the end of the thin-film evaporator the treated feed leaves it.
  • the division of the thin-film evaporator has the effect that impurities from the thin-film evaporator preferably fail in the first stage and therefore do not contaminate the washing liquid in the second stage and pure Hg is obtained.
  • the cleaned exhaust gas is released into the atmosphere via an exhaust gas chimney.
  • the liquids condensed out in the condensation stages - essentially water and mercury with impurities - are separated by decantation.
  • the water is fed to a process water collection container. From it, the amount of water required for the preparation station is used again. The rest are then cleaned and then stored in a container for clean process water to e.g. to be used again as washing water in the process or in the drum washing station. Excess quantities are discharged into the sewage system as waste water after cleaning.
  • the separated mercury is weighed in a weighing station so that the recovered mercury can be assigned to the processed customer batches. Then it is collected in a buffer container. From there it is further cleaned - if it is necessary for the respective application - and ready for dispatch in the filling station in the standard 36.5 kg steel containers bottled.
  • FIG. It is a thin-film evaporator 1 with a rotary atomizer 2.
  • the jacket 3 of the thin-film evaporator contains a rotating device 4.
  • the thin-film evaporator 1 has a first operating fluid chamber 5 for condensing water vapor, a second operating fluid chamber 6 and a third operating fluid chamber 7, each for hot oil as organic Heat transfer fluid.
  • the device has a heat exchanger 8 for water heating.
  • the system has a vacuum pump 13 and a batch and preheating container 14.
  • a mill 15 is used to prepare the material for wet grinding, which is connected to a circulation pump 16. There is also a diaphragm pump 17.
  • the thin-film evaporator 1 is connected to a cooling device 18, which in turn is connected to discharge containers 19 and 20 from the vacuum.
  • the system also has a pneumatic conveying device 21 and a submersion vessel 22 with a barometric height difference from the separator / decanter 10.
  • the system also has coolers 24 and 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treating Waste Gases (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP89108089A 1988-05-12 1989-05-05 Verfahren zur destillativen Reinigung quecksilberhaltiger Stoffe bzw. Stoffgemische Expired - Lifetime EP0341580B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3816282 1988-05-12
DE3816282A DE3816282C1 (enrdf_load_stackoverflow) 1988-05-12 1988-05-12

Publications (3)

Publication Number Publication Date
EP0341580A2 EP0341580A2 (de) 1989-11-15
EP0341580A3 EP0341580A3 (en) 1990-10-17
EP0341580B1 true EP0341580B1 (de) 1995-07-26

Family

ID=6354263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108089A Expired - Lifetime EP0341580B1 (de) 1988-05-12 1989-05-05 Verfahren zur destillativen Reinigung quecksilberhaltiger Stoffe bzw. Stoffgemische

Country Status (3)

Country Link
EP (1) EP0341580B1 (enrdf_load_stackoverflow)
AT (1) ATE125575T1 (enrdf_load_stackoverflow)
DE (2) DE3816282C1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127506C1 (enrdf_load_stackoverflow) * 1991-08-20 1992-10-15 Hak-Anlagenbau Gmbh, 2000 Hamburg, De
NL9101802A (nl) * 1991-10-28 1993-05-17 Recycling Nederland B V Werkwijze en inrichting voor het verwijderen van een of meer verontreinigingen uit een bulkmateriaal.
US5300137A (en) * 1992-09-18 1994-04-05 Pittsburgh Mineral And Environmental Technology, Inc. Method for removing mercury from contaminated soils and industrial wastes and related apparatus
DE4429869C1 (de) * 1994-08-23 1996-01-18 Degussa Verfahren zur Aufarbeitung zinkhaltiger Amalgame
DE19547151C2 (de) * 1995-12-16 1999-06-17 Ald Vacuum Techn Gmbh Verfahren und Vorrichtung zum Aufarbeiten von Stoffgemischen mit mindestens zwei Phasen mit unterschiedlichen Siedetemperaturen
US8715402B2 (en) * 2011-03-22 2014-05-06 Mitsubishi Heavy Industries, Ltd. Air pollution control system and air pollution control method, spray drying device of dewatering filtration fluid from desulfurization discharged water, and method thereof
CN109705171A (zh) * 2019-01-08 2019-05-03 天元军融(辽宁)化工研究所新材料孵化器股份有限公司 一种二茂铁快速提纯方法及装置
CN115896485A (zh) * 2022-11-21 2023-04-04 中国电子科技集团公司第十一研究所 一种汞蒸馏提纯设备及汞提纯方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE361439C (de) * 1921-02-17 1922-10-14 Alexander Wacker Dr Verfahren zur Regenerierung von Quecksilberschlamm
DE688563C (de) * 1938-08-17 1940-02-24 Georg Plueschke Vorrichtung zum Gewinnen von Quecksilber
GB1373771A (en) * 1971-03-05 1974-11-13 Bp Chem Int Ltd Mercury recovery process
SE361181B (enrdf_load_stackoverflow) * 1971-07-02 1973-10-22 Graenges Eng Ab
IT1037842B (it) * 1975-05-05 1979-11-20 Anic Spa Processo per la rimozione di mercurio da fanghi che lo contengono
DD230270A3 (de) * 1982-09-07 1985-11-27 Bitterfeld Chemie Verfahren und vorrichtung zur aufarbeitung von quecksilberhaltigen materialien
JPH10222979A (ja) * 1997-01-31 1998-08-21 Mitsubishi Electric Corp 情報処理装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WINNACKER-KÜCHLER "Chemische Technologie", 4. Auflage (1984), Band 1: "Allgemeines", S. 157 *

Also Published As

Publication number Publication date
EP0341580A2 (de) 1989-11-15
EP0341580A3 (en) 1990-10-17
ATE125575T1 (de) 1995-08-15
DE3816282C1 (enrdf_load_stackoverflow) 1989-10-05
DE58909362D1 (de) 1995-08-31

Similar Documents

Publication Publication Date Title
DE3706684C2 (enrdf_load_stackoverflow)
US5453562A (en) Process for removing volatile components from soils and sludges contaminated with hazardous and radioactive materials
DE3615027C2 (enrdf_load_stackoverflow)
EP0359003B1 (de) Verfahren zur Überführung von festen, weitgehend wasserfreien Abfallstoffen in Glasform sowie Vorrichtung zur Durchführung des Verfahrens
DE69200560T2 (de) System zur Behandlung von festen Produkten durch Thermolyse deren Beseitigung umweltschädlich ist.
DE2422814A1 (de) Verfahren und anlage zum reinigen von verunreinigten fluessigkeiten
EP0341580B1 (de) Verfahren zur destillativen Reinigung quecksilberhaltiger Stoffe bzw. Stoffgemische
EP0632843B1 (de) Verfahren zum entfernen von blei und zink aus hüttenwerksstaub
DE3013325A1 (de) Verfahren zur trocknung und vorerhitzung von kohle unter ausnutzung der fuehlbaren kokswaerme bei der trockenen kokskuehlung bzw. -loeschung
EP0299340B1 (de) Verfahren zur Entfernung von Schwermetallverbindungen aus dem Filterstaub von Müllverbrennungsanlagen, Rauchgasentstaubunbs- und Gasreinigungsanlagen
EP0313902B1 (de) Verfahren zur Abtrennung von giftigen flüchtigen chemischen Verbindungen aus einem Gemenge von festen Partikeln mit einer Partikelgrösse bis 200 Mikron
DE10030251A1 (de) Abtrennung von Metallchloriden aus gasförmigen Reaktionsgemischen der Chlorsilan-Synthese
EP0432812A1 (de) Verfahren zur Reinigung von kontaminierten Böden
EP2612715B1 (en) Recovery of sulfur from sulfur-containing waste
DE3612259A1 (de) Loesemittel-eliminationsverfahren zur reinigung von luft von loesemitteldaempfen
US2785059A (en) Solvent extraction of sulphur
CA1066872A (en) Method and apparatus for the fabrication of pure alumina from al2o3 and silica containing raw materials by leaching with hydrochloric acid
EP3697513A1 (de) Aufbereitung von gefilterten walzoel und filterhilfsmittel
DE4001779A1 (de) Verfahren zur regenerierung eines katalysators fuer die reformierung oder die herstellung aromatischer kohlenwasserstoffe
DE3023670A1 (de) Verfahren und vorrichtung zum schwelen von oelschiefer
DE19904903A1 (de) Verfahren und Vorrichtung zum Entsorgen von elektrischen Grossgeräten
DE4037743C2 (enrdf_load_stackoverflow)
DE4127506C1 (enrdf_load_stackoverflow)
EP0131116A1 (de) Verfahren und Einrichtung zum thermischen Beseitigen von salzhaltigen und organikabeladenen Flüssigkeiten, insbesondere Abwässern
DE674099C (de) Verfahren und Einrichtung zur Gewinnung von Schwefel

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

AK Designated contracting states

Kind code of ref document: A2

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19901214

17Q First examination report despatched

Effective date: 19920228

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 ES FR GB GR IT LI LU NL SE

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

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: 19950726

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: 19950726

Ref country code: GB

Effective date: 19950726

Ref country code: ES

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

Effective date: 19950726

Ref country code: GR

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: 19950726

REF Corresponds to:

Ref document number: 125575

Country of ref document: AT

Date of ref document: 19950815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58909362

Country of ref document: DE

Date of ref document: 19950831

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

Ref country code: SE

Effective date: 19951026

ET Fr: translation 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: 19950726

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

Ref country code: AT

Effective date: 19960505

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

Ref country code: BE

Effective date: 19960531

Ref country code: CH

Effective date: 19960531

Ref country code: LU

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

Effective date: 19960531

Ref country code: LI

Effective date: 19960531

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

26N No opposition filed
BERE Be: lapsed

Owner name: BERNECKER GERHARD

Effective date: 19960531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

Effective date: 19970131

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

Ref country code: DE

Effective date: 19970201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST