EP0126060A2 - Mise sous forme stockable de résines échangeuses d'ions, en particulier celles contenant des substances nocives - Google Patents

Mise sous forme stockable de résines échangeuses d'ions, en particulier celles contenant des substances nocives Download PDF

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Publication number
EP0126060A2
EP0126060A2 EP84890082A EP84890082A EP0126060A2 EP 0126060 A2 EP0126060 A2 EP 0126060A2 EP 84890082 A EP84890082 A EP 84890082A EP 84890082 A EP84890082 A EP 84890082A EP 0126060 A2 EP0126060 A2 EP 0126060A2
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EP
European Patent Office
Prior art keywords
embedding
weight
amine
bitumen
acid
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.)
Granted
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EP84890082A
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German (de)
English (en)
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EP0126060A3 (en
EP0126060B1 (fr
Inventor
Karl Dr. Knotik
Peter Leichter
Walter Dipl.-Ing. Winkelhofer
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.)
Oesterreichisches Forschungszentrum Seibersdorf GmbH
Original Assignee
Vereinigte Edelstahlwerke AG
Oesterreichisches Forschungszentrum Seibersdorf GmbH
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
Priority claimed from AT173983A external-priority patent/AT379251B/de
Priority claimed from AT173883A external-priority patent/AT379250B/de
Application filed by Vereinigte Edelstahlwerke AG, Oesterreichisches Forschungszentrum Seibersdorf GmbH filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0126060A2 publication Critical patent/EP0126060A2/fr
Publication of EP0126060A3 publication Critical patent/EP0126060A3/de
Application granted granted Critical
Publication of EP0126060B1 publication Critical patent/EP0126060B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/28—Treating solids
    • G21F9/30—Processing
    • G21F9/301—Processing by fixation in stable solid media
    • G21F9/307—Processing by fixation in stable solid media in polymeric matrix, e.g. resins, tars

Definitions

  • the invention relates to the conversion of anicne exchange resins, in particular containing pollutants, or mixtures containing them, under heat treatment, into an especially environmentally friendly and long-term storable state.
  • ion exchange resins which counteracts the principle of concentration and thus uneconomically increases the workload.
  • So-called single-use ion exchange resins are primarily used here, ie ground ion exchange resins with a grain size of approx. 4 ⁇ m. They are washed up in thin layers - a few millimeters to a few centimeters - on suitable filter elements relatively high flow velocities and removed from the precoat filter by rewinding before the pollutants break through the layers.
  • the powder resins which are loaded in this way and accumulate in considerable quantities, or else the exhausted spherical resins which are loaded in columns, are usually centrifuged off from the adhering water and transferred in loose containers to storage containers and stored temporarily. Since storage in bulk can cause environmental pollution, e.g. by removing the containers and / or leaching the ion exchanger in the event of water ingress in the event of a catastrophe. If safety cannot be ruled out, efforts are made to convert the ion-exchange resins loaded with pollutants, in particular the anion-exchange resins, into a stable, final storage form.
  • the method according to AT-PS 338.388 represents a further development compared to the previously mentioned methods, in which ion exchange resins are thermally decomposed in a medium that does not maintain combustion.
  • the thermal decomposition of anion exchange resins begins at a temperature above 280 ° C. Accordingly, according to this AT-PS, temperatures of less than 500 ° C., preferably between 280 and 500 ° C., are selected for the decomposition. In this way, the resins are converted into a form which is sufficiently stable and storable even against racrolytic decomposition.
  • This product can be stored in the received form, or additionally embedded in concrete or bitumen and protected against possible leaching, in appropriate landfills, since the resins have been heated above their decomposition temperature.
  • the procedure is particularly favorable if the temperature is raised to a temperature of up to 280 ° C., preferably between 110 and 270 ° C., preferably between 140 and 250 ° C., particularly advantageously to about 210 ° C., which can advantageously contribute to effectiveness.
  • the mixtures are heated to these temperatures rapidly, preferably in less than 5 min, preferably in less than 2 min, in particular in less than 40 s.
  • Anion exchange resins or mixtures containing them possible are understood to mean all types of materials, for example sludges, suspensions, etc., which contain such anion exchange resins, the resins in turn being loaded with any substances, in particular pollutants, for example toxic and / or radioactive substances and the like.
  • the mass obtained after heating under alkaline conditions is converted into a liquefied, high molecular weight organic embedding mass with bitumen and / or tall oil pitch and / or paraffins and / or essentially containing at least one amine-curing polymer and / or other amine-binding organic compound introduced non-amine-curing polymer, preferably sunk sedimentatively under the effect of its own weight.
  • bitumen can be substituted by montan wax, earth pitch, ozokerite or the like. In the following, only the expression bitumen is used for this. This creates a solid and dense matrix for the embedded resin degradation products.
  • the mass obtained is introduced into a liquefied embedding mass, preferably a bitumen melt, the temperature of which is lower than that when the anion exchangers or mixtures containing them are heated, in particular to 120 to 210 ° C., preferably to 160 to Is kept at 190 ° C.
  • the embedding compound is brought to a temperature which is higher than the embedding temperature.
  • the amines or the vapors released during the heating of the anion exchange resins or the mixtures containing them preferably at a pressure below the gas pressure, preferably with a pH of at most 4 , aqueous solution of at least one acid, which is optionally at least partially an acid, the amine salts of which are biodegradable, preferably brought into contact with citric acid and / or tartaric acid and / or acetic acid, preferably passed through them, thereby endangering and polluting the environment can be avoided by the vapors of the heating process.
  • a particularly preferred device for carrying out the method according to the invention has a heating device and a device for extracting gases and / or vapors from the heating device at a pressure below the ambient gas pressure, the heating device having at least one device for separating gases formed there and / oror vapors, and is characterized in that between the heating device and suction device, a reactor which can be flowed through by gases or vapors released from amines or mixtures containing them when heated with anion exchangers or mixtures containing them, with a, preferably aqueous, solution of a, preferably biodegradable , Acid is arranged.
  • the reactor can e.g. an absorption vessel, vapor washer, mixing reactor or the like. which contains the solution of the acid into which the amines or vapors are suctioned off with the evacuation device, e.g. a suction jet pump.
  • the evacuation device e.g. a suction jet pump.
  • Thin-film dryers have proven to be particularly suitable as heating devices, and are described, like the evacuation devices, for example in AT-PS 336.739 and 336.146.
  • the suction device is preferably one with a Jet ejector is fed from the medium removed from the second reactor.
  • control and control devices for the pH values in the reactors are advantageously provided, as well as for the entry device for the anion exchange resins and the heating device.
  • the exchangers thermally degraded according to the invention in an alkaline environment can be expelled, for example continuously, through a vertical thin-film dryer as a heating device via a lock system under negative pressure into the storage container used in a recipient be brought.
  • the dried substances accumulated during the change of the filling container are collected in the lock and then discharged into the container adapted to the operating conditions.
  • Certain storage containers advantageously contain a matrix material, particularly for final storage.
  • the finished liquefied embedding compound with the amine-binding additives can be supplied to the storage container via a supply line.
  • a feed device for the additives opening into the feed line to the storage container or into an embedding material storage container is advantageously provided.
  • the substances embedded in this way no longer release gases, are therefore homogeneously distributed in the matrix without gas bubbles and foam formation and are particularly suitable for storage that is safe against leaching.
  • the penetration and softening point of the solidified matrix are significantly shifted to higher values, which also significantly improves the thermal load capacity of the final mass. As such, it is possible to store the materials temporarily after leaving the heating device. Such intermediate products can, if necessary, be embedded in the matrix material at a later time under conditions as described above, advantageously after reheating.
  • the invention further relates to a liquefiable investment compound with situmen and / or paraffin and / or Tall oil pitch as a base material and optionally additives, for embedding amine-containing, preferably containing free reactive amines, and / or releasing anion exchange resins or mixtures containing these and / or their decomposition products, which are particularly suitable for use in the previously described new process and in the device described is suitable.
  • the new embedding compound is characterized in that in the bitumen and / or paraffin and / or tall oil pitch, preferably bitumen, the base compound of the embedding compound contains at least 0.5% by weight, preferably at least 2% by weight, reactive amine-binding additives, preferably epoxy compounds , in particular glycides and / or epoxy resins, and / or, preferably organic, acid anhydrides, in particular dodecenylsuccinic anhydride, and / or reactive phenolic resins, preferably in solution, are present.
  • the new mass therefore contains, in the organic matrix, preferably soluble, reactive compounds which can react with the free amines or amine groups to form stable compounds.
  • the new composition is also ideally suited for thermally not pretreated or only dried anon exchange resins or mixtures containing them.
  • the products obtained are more stable than those which are embedded in a matrix without reactive additives.
  • anion exchange resins are e.g. Anion-cation exchange resins, narrow sludges containing anion exchange resins, mixtures of anion exchange resins with pollutants and the like. Like. To understand, in particular anion exchange resins present in aqueous, alkaline suspension or mixtures containing them.
  • bitumen is chosen as the base material for the embedding material, there is the advantage that the products obtained remain plastisonous and cracks which heal under mechanical stress are healed by themselves. Further advantages of such embedding compounds are high resistance to radiolytic decomposition, the water-repellent inherent properties and high resistance to aging and thermal decomposition. In contrast, only ion exchange resins embedded in synthetic resin have only higher mechanical strength. Petroleum bitumens are particularly suitable as the base material, but also natural bitumens, such as natural asphalt, montan waxes, earth pitch, ozokerite and / or the like. The selection of the proportions of the individual substances contained in the base material also depends, inter alia, on the degree of thermal pretreatment of the anion exchange resins.
  • anion exchange resins are used after a pretreatment carried out at a higher temperature than is used for the introduction into the bitumen melt in order to avoid foaming or outgassing of the melt.
  • the amine-reactive compounds are selected so that a reaction takes place to the required extent at the selected temperatures.
  • the addition of bitumen-soluble epoxy compounds and / or acid anhydrides and / or reactive phenolic resins as an amine-binding substance to bitumen has the effect that the embedding compound is significantly solidified after incorporation of the amine into the respective synthetic resin structure. The penetration and softening point of the matrix are shifted to significantly higher values, which significantly improves the thermal load-bearing capacity of the solidified product.
  • the structure of the matrix can be further strengthened by adding fibrous aggregates.
  • Mineral fibers such as, for example, asbestos, rock wool, or glass fibers, or organic fibers, such as, for example, fibers with cellulose and their derivatives, or plastic fibers, such as, for example, with polyester, polyamides or Like. Or carbon fibers used.
  • waste fibers or waste from fiber production can also be used for this purpose.
  • the amine-reactive additives are advantageously added to the base composition in such amounts that their negative properties, if any, do not impair the properties of the base composition. Their amount is also advantageously chosen to be somewhat larger than is necessary for amine binding.
  • embedding compounds are particularly preferred, in which the reactive amine-binding additives are contained in total amounts of at most 50% by weight, preferably of at most 30% by weight, based in each case on the base weight.
  • High strength of the compositions can be achieved particularly favorably if, in each case based on the base composition, 2 to 30% by weight, preferably 5 to 20% by weight epoxy resins or 0.5 to 30% by weight, preferably 1 to 20 wt .-%, low molecular weight epoxy compounds, preferably glycides, preferably butylene glycol diglycidyl ether, are contained.
  • the base composition particularly preferably contains at least 50% by weight, in particular 75% by weight, of bitumen.
  • Bituminous base compositions up to 30% by weight, especially up to 10% by weight Tall oil pitch, based on bitumen, has proven itself.
  • At least one amine-reactive additive is only formed from the starting materials added to it in the molten matrix, which may have already been mixed with other reactive additives.
  • the preferred procedure is to prior to and / or during and / or in the basic mass formed with higher molecular weight substances or their mixtures, in particular bitumen and / or montan wax and / or czokerite and / or paraffin and / or tall oil pitch the embedded optionally substituted as described above, thermally treated after the addition in an alkaline form, material reactive, in particular the amine-binding additives previously described, and g e-ussifalls added which, as also already mentioned, the mechanical structure of the matrix reinforcing aggregates.
  • Advantageous embedding temperatures are below 280 ° C, in particular 120 to 220 ° C, preferably 160 to 220 ° C.
  • a further advantageous embodiment of the method consists in the optionally thermally degraded ion exchange resins or the mixtures containing them the base material and the reactive additives, optionally with the addition of the additives, preferably by means of a screw extruder.
  • the invention is described below by way of example with reference to the drawing.
  • the system shown there is based on a known system as used for vacuum sedimentation for embedding dried, bio-harmful waste products according to AT-PS 336.739 and 336.146.
  • a vertical thin-film dryer 2 is fed from a container 1, optionally ground, anion exchange resins or mixtures containing them in basic, aqueous form, for example as a suspension.
  • the exchangers or mixtures are preferably mixed with NaOH, the pH being regulated to 9-11 by means of a monitoring device 12.
  • a feed device 13 for alkaline medium, for example NaOH opens into the container 1.
  • the exchangers or mixtures are fed to the container 1 by means of a pump 14 or the like.
  • the suspension is introduced into the dryer 2, preferably continuously, via a pump 15.
  • the substances entered form a thin film on the inner wall of the thin-layer dryer 2, which is dried very quickly.
  • Blades 16 driven by a motor 18 via a shaft 17 scrape the dried mass, which contains the solid decomposition products of the exchange resins or the mixtures used, and these fall into a lock 3 with a locking mechanism 19.
  • the lock 3 When the lock 3 is opened, the dried mass enters one Container 6, which is anoronet in a recipient 5, so that container 6 is also under the action of an evacuation device 11 and good sedimentation of the dry mass in the loading container 6 located melt of the investment material is achieved. It is also possible to stir in the dried substances.
  • the liquefied embedding compound is fed to the container 6 from a storage container 4 via a pump 20 and a quantity measuring device.
  • a container 22 is provided, from which amine-binding additives can be supplied to the base material via a pump or metering device 23.
  • the dried and degraded exchanger residue together with the pollutants it contains can also be collected loosely or introduced into a matrix provided according to the invention, in particular based on bitumen with the additives.
  • the thermal degradation or the thermal degradation with subsequent embedding in a corresponding matrix, advantageously a bitumen matrix, can thus be carried out.
  • the amines released from the resins during heating in the dryer 2 are sucked out of them by means of an evacuation device 11.
  • a dust separator 7 from which the return of separated dust into the container 1 via a lock 21 is possible.
  • the gases and / or vapors containing the amines enter a reactor 8 which contains an aqueous acid solution for binding the amines, the pH value of which is monitored by monitoring device 28.
  • Reactor 8 is advantageously cooled.
  • the reaction products formed can be discharged via a line 24.
  • the acid medium in the reactor 8 can be kept at a constant level, for example by means of a controlled metering pump.
  • the solution can be charged with mineral acids, for example sulfuric acid, nitric acid, phosphoric acid, etc. and / or biodegradable organic acids, for example acetic acid, citric acid and / or tartaric acid can be adjusted to pH values between 0 and 4 by means of pH meter 28 and metering device 29.
  • a metering device 35 which is controlled by a pH meter 30, is provided in an analogous manner for the reactor 9. Acidic vapors and / or gases drawn off from reactor 8 with pump 11 are passed into further reactor 9, which is preferably cooled and contains alkaline medium. The reaction products are discharged from the reactor 9 via a line 25.
  • a branch of a circulation line 33 leading to the pump 11 also emanates from the reactor 9, via which medium from the reactor 9 is conveyed as a blasting medium into the pump 11 operating according to the ejectro principle.
  • the reactor medium On the output side of pump 11, the reactor medium is intimately mixed with the gases in the second branch of line 33.
  • the pH of the medium of reactor 9 is monitored with a control device 30 and subsequently supplied with an alkaline medium.
  • the cleaned gases can pass from the reactor 9 into the atmosphere via a filter 10. In this way, the amines formed during the heating and sucked off by the suction jet pump 11 are rendered harmless in gases and / or vapors.
  • the system shown is essentially a closed system, which is under rough vacuum during operation.
  • Thin-layer dryer 2, lock 3, storage container 4, storage container 6 or recipient 5 and the associated lines 31 for embedding compound and, if appropriate, for the additives can be heated by means of heater 32.
  • the energy can be supplied electrically by superheated steam or a heat transfer medium, which is brought to the required temperature by means of a heater and pumped in the circuit.
  • the other parts of the plant are preferably unheated and thus allow the complete condensation of aqueous components and binding of amine pollutants from the vapors and / or gases.
  • Reactor 8 and / or reactor 9 can be cooled by means of cooling devices 34.
  • the reactors 8 and / or 9 can also be designed in two stages and each have an upstream condenser from which the condensate can be fed into the respective reactor vessel with acid or alkali.
  • the dryer heating zone is heated to 210 - 220 ° C, the system vacuum set to 130 - 150 mb.
  • a 200 1 1 sheet steel drum is placed in the waste container recipient, in which around 100 1 of liquefied embedding compound are submitted according to the invention at 170 ° C.
  • the melt contains 85 kg of standard bitumen B15, 10 kg of tall oil pitch and 5 kg of epoxy resin with an epoxy equivalent weight of 190 (eg Epotuf 37 - 140 from Reichold Chemie AG).
  • the thermally degraded exchange resin or mixture heated in the dryer gets into the melt of the embedding compound and sediments under the effect of gravity, the reduced pressure and the surface forces into the melt, which is kept at 170 ° C for 0.5 h to react, whereby every single grain is covered with a thick covering of matrix material.
  • all reactive residual amines are chemically bound by the epoxy resin of the embedding compound and the resulting molecular complexes contribute to the additional solidification of the bitumen matrix.
  • the volatile degradation products are bound by means of gas scrubbing according to Example 1, vapors are condensed in a separate condenser if necessary.
  • the dried, heated resin degradation products together with other solid substances are collected in containers and, if appropriate after interim storage, embedded in an embedding melt with 92% by weight of standard bitumen B40 and 8% by weight of dodecenylsuccinic anhydride at 170 ° C.
  • the reactive residual amines contained in the resin degradation product are bound by the acid anhydride in the matrix.
  • the reactive additive in this case dodecenylsuccinic anhydride, can also be formed directly in the bedding from these added starting materials. So you can e.g. add a corresponding amount of dodecenylsuccinic acid to the base material or also an embedding material and form dodecenylsuccinic anhydride by heating and optionally applying negative pressure by removing water in the melt.
  • the viscous suspension is metered in with a metering pump according to the evaporating capacity at 60 l / h and a thin-film dryer at 210 ° C at 160 mb absolute.
  • the solids are dried, the ion exchange resin is degraded and the volatile degradation products are retained in the system in accordance with Example 1.
  • the dried product, mixed with the degraded ion exchange resin is placed directly in an embedding melt with 89% by weight of standard bitumen B80, 9% bitumen-soluble epoxy resin (epoxy equivalent weight of about 190, Epon 828, Shell AG) and 2% by weight of butylene lily diglycidyl ether introduced at 120 ° C, while remaining reactive amines are fixed.
  • a powder resin mixture with cation and anion exchange resin (Powadex PCH and Powdex PAO) is thermally broken down and stored temporarily. 45 kg of this mined resin mixture are continuously fed into one in a metering device 100 1-steel keg of embedding compound with phenolic resin (Viaphen PA 101, Vianova) melted from 45 kg at 70 - 80 ° C and 10 kg epoxy resin (Epotuf 37 - 140), after which the mass was heated to about 100 to react - 110 ° C for 1 h.
  • the reactive residual amines of the exchange resin are fixed in the matrix, which after cooling and curing is extremely dimensionally stable, thermally resilient and leach-resistant.
  • the product After cooling, the product has properties similar to those obtained in Example 5; the resistance to breakage is increased due to the increased toughness of the matrix.
  • a powder resin mixture of cation exchange resin and anion exchange resin (Powdex PCH and Powdex PAO) is dried in a drying chamber at 120 ° C and stored temporarily. 90 kg of this degraded resin mixture are continuously fed via a metering device into an embedding compound placed in a 200 1 metal drum with 90 kg of standard bitumen B200, 10 kg of phenolic resin (Viaphen PA101 from Vianova) and 5 kg of epoxy resin (Epotuf 37-140 from Reichhold Chemie AG ) and a temperature of 80 to 90 ° C stirred. The mixture is then heated to 100-110 ° C. for 1 hour. The mass contained is also very dimensionally stable, thermally resilient and resistant to dehydration.
  • the products produced according to Examples 1 to 4 and 7 to 9 can be removed after the system has been aerated, and after cooling, like the products produced by stirring in Examples 5 and 6, represent a stable, largely leach-resistant, non-gassing, homogeneous block. If such a block is split mechanically, the fracture surface shows a completely homogeneous image and no odor pollution from volatile amines can be detected.
  • the products or compositions obtained in this way are outstandingly suitable for long-term storage and can also be recycled at a later point in time, if necessary, for the pollutants contained therein.
EP19840890082 1983-05-11 1984-05-10 Mise sous forme stockable de résines échangeuses d'ions, en particulier celles contenant des substances nocives Expired - Lifetime EP0126060B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT173983A AT379251B (de) 1983-05-11 1983-05-11 Verfahren zur ueberfuehrung von anionenaustauscherharzen in einen umweltfreundlich lagerbaren zustand sowie vorrichtung zur durchfuehrung des verfahrens
AT1738/83 1983-05-11
AT1739/83 1983-05-11
AT173883A AT379250B (de) 1983-05-11 1983-05-11 Einbettungsmasse und verfahren zum einbetten von anionenaustauscherharzen bzw. diese enthaltenden gemischen

Publications (3)

Publication Number Publication Date
EP0126060A2 true EP0126060A2 (fr) 1984-11-21
EP0126060A3 EP0126060A3 (en) 1987-11-25
EP0126060B1 EP0126060B1 (fr) 1991-07-17

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EP19840890082 Expired - Lifetime EP0126060B1 (fr) 1983-05-11 1984-05-10 Mise sous forme stockable de résines échangeuses d'ions, en particulier celles contenant des substances nocives

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EP (1) EP0126060B1 (fr)
DE (1) DE3484805D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931192A (en) * 1989-03-22 1990-06-05 The University Of Tennessee Research Corporation Method for the disposal of hazardous non-polar organic wastes
DE19700832A1 (de) * 1997-01-13 1998-07-16 Siemens Ag Produkt zur Endlagerung radioaktiv kontaminierter Ionenaustauscherharze
DE19707982A1 (de) * 1997-02-27 1998-09-03 Siemens Ag Produkt zur Endlagerung radioaktiv kontaminierter Ionenaustauscherharze

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137947C2 (de) * 1991-11-18 1996-01-11 Siemens Ag Verfahren zur Behandlung von radioaktivem Abfall

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317741A1 (fr) * 1975-06-26 1977-02-04 Ver Edelstahlwerke Ag Noyage ou enrobage sous vide partiel de dechets radioactifs et/ou toxiques par liant solidifiable
FR2317740A1 (fr) * 1975-06-26 1977-02-04 Ver Edelstahlwerke Ag Transformation par chauffage de resines echangeurs d'ions radioactives en produits stockables
FR2318487A1 (fr) * 1975-07-15 1977-02-11 Kraftwerk Union Ag Procede d'elimination de dechets de matieres synthetiques radioactifs et installation pour sa mise en oeuvre
FR2361724A1 (fr) * 1976-08-12 1978-03-10 Commissariat Energie Atomique Procede de stockage de resines echangeuses d'ions contaminees
DE2851231A1 (de) * 1977-11-28 1979-05-31 Hitachi Ltd Verfahren zur behandlung radioaktiven abfalls

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317741A1 (fr) * 1975-06-26 1977-02-04 Ver Edelstahlwerke Ag Noyage ou enrobage sous vide partiel de dechets radioactifs et/ou toxiques par liant solidifiable
FR2317740A1 (fr) * 1975-06-26 1977-02-04 Ver Edelstahlwerke Ag Transformation par chauffage de resines echangeurs d'ions radioactives en produits stockables
FR2318487A1 (fr) * 1975-07-15 1977-02-11 Kraftwerk Union Ag Procede d'elimination de dechets de matieres synthetiques radioactifs et installation pour sa mise en oeuvre
FR2361724A1 (fr) * 1976-08-12 1978-03-10 Commissariat Energie Atomique Procede de stockage de resines echangeuses d'ions contaminees
DE2851231A1 (de) * 1977-11-28 1979-05-31 Hitachi Ltd Verfahren zur behandlung radioaktiven abfalls

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4931192A (en) * 1989-03-22 1990-06-05 The University Of Tennessee Research Corporation Method for the disposal of hazardous non-polar organic wastes
DE19700832A1 (de) * 1997-01-13 1998-07-16 Siemens Ag Produkt zur Endlagerung radioaktiv kontaminierter Ionenaustauscherharze
DE19707982A1 (de) * 1997-02-27 1998-09-03 Siemens Ag Produkt zur Endlagerung radioaktiv kontaminierter Ionenaustauscherharze

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Publication number Publication date
EP0126060A3 (en) 1987-11-25
DE3484805D1 (de) 1991-08-22
EP0126060B1 (fr) 1991-07-17

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