EP1054721B1 - Procede de conservation d'objets argentes et appareil d'epuration pour sa mise en oeuvre - Google Patents
Procede de conservation d'objets argentes et appareil d'epuration pour sa mise en oeuvre Download PDFInfo
- Publication number
- EP1054721B1 EP1054721B1 EP99900931A EP99900931A EP1054721B1 EP 1054721 B1 EP1054721 B1 EP 1054721B1 EP 99900931 A EP99900931 A EP 99900931A EP 99900931 A EP99900931 A EP 99900931A EP 1054721 B1 EP1054721 B1 EP 1054721B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silver
- chamber
- preserving
- conserving
- objects
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001914 filtration Methods 0.000 title claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 66
- 239000004332 silver Substances 0.000 claims description 66
- 238000000746 purification Methods 0.000 claims description 33
- 210000002268 wool Anatomy 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical class [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 69
- 239000007789 gas Substances 0.000 description 25
- 150000003464 sulfur compounds Chemical class 0.000 description 10
- 238000005987 sulfurization reaction Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 238000001994 activation Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 230000004913 activation Effects 0.000 description 5
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- 238000005494 tarnishing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
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- 238000012360 testing method Methods 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 229940082150 encore Drugs 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 239000011734 sodium Substances 0.000 description 2
- 239000010965 430 stainless steel Substances 0.000 description 1
- 241000195940 Bryophyta Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- UYJXRRSPUVSSMN-UHFFFAOYSA-P ammonium sulfide Chemical compound [NH4+].[NH4+].[S-2] UYJXRRSPUVSSMN-UHFFFAOYSA-P 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
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- 235000011929 mousse Nutrition 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011049 pearl Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 239000001120 potassium sulphate Substances 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- -1 silver form silver sulfides Chemical class 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L sodium sulphate Substances [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- PGWMQVQLSMAHHO-UHFFFAOYSA-N sulfanylidenesilver Chemical class [Ag]=S PGWMQVQLSMAHHO-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
Definitions
- the invention relates to the field of protection and conservation of silver metallic objects.
- the method according to the invention allows to purify gases intended to constitute the environment of these objects.
- the method according to the invention is implemented, for example, for protect and conserve such objects while they are exposed to public.
- Table 1 shows the main air polluting species responsible for tarnishing silver, as well as their respective concentrations. According to FRANEY (1985): "The corrosion of silver by atmospheric sulfurous gases", Corrosion Science, Vol 25, n ° 2. pollutants SCO SO 2 H 2 S CS 2 Average Concentration In ppb 0.5 0.1 0.03 0.03
- Carbonyl sulfide, OCS is the main pollutant identified, it is also the most reactive, ahead of H 2 S, SO 2 then CS 2 .
- the sulphurization of silver is moreover very sensitive to humidity of the air because the presence of a few monolayers of water on the surface of the metal is sufficient to hydrolyze OCS, to dissolve and dissociate H 2 S allowing the reaction: 4Ag + 2HS - TM 2Ag 2 S + H 2 + 2e -
- This reaction is responsible for the darkening, tarnishing and corrosion of silver.
- the object of the present invention is to provide a method of conservation of silver objects which does not have the disadvantages noted above, and which is nevertheless very effective.
- the invention is a method of preserving and conservation of silver objects including the step of conditioning the objects in a desulfurized atmosphere characterized in that one desulfurizes the atmosphere in contact with cathodically activated metallic silver.
- a material composed of silver metallic allows to trap sulfur compounds likely to be find in a gas intended to form the atmosphere of silver objects 1 to protect, before this gas comes into contact with these objects 1.
- metallic silver is preferably put in a form having a large surface specific.
- This surface is developed, the more the trapping surface sulfur compounds is important. This both promotes exchanges with the gas and increase the quantity of molecules that can be trapped before reaching the saturation of this surface with respect to sulfurization reactions.
- the silver objects 1 to be protected are placed in an enclosure 300, in order to confine the atmosphere surrounding these silver objects 1 (figure 1). But we can also consider placing these objects 1 under a gas flow.
- the silver objects 1 are placed in an enclosure 300, the atmosphere thereof is maintained at overpressure relative to outside the enclosure 300. In this way, it is possible to use enclosures 300 of limited sealing, and therefore less difficult to produce and less expensive than 300 waterproof enclosures. Overpressure at the interior of the enclosure 300 limits the penetration of gas which has not been removed by the interstices of it.
- the gas is de-fumed before or at its entry into the enclosure.
- a purification device 100 then convey the gas desulfured by the device treatment plant 100 to enclosure 300 by a suitable conduit 150 (see figure 2).
- the metallic silver for trapping sulfur compounds is placed in a 200 cassette, at an opening inlet 310 of the gas into the enclosure 300, while a fan 50 is located in an outlet opening 320 for gas from the enclosure 300. From this way, the gas is sucked into the enclosure 300 and fumed at its entry while it is extracted from the enclosure 300 by the fan 50 (FIG. 3),
- silver metallic trap for sulfur compounds is placed in a cassette 200 so as to be both swept by the gas entering the enclosure 300 and by part of the gas from the enclosure 300 (FIG. 4). In this way, the gas in enclosure 300 undergoes recycling.
- the method according to the invention can also be implemented by having metallic silver activated cathodically, in several locations in enclosure 300.
- activated metallic silver cathodically can be arranged in such a way as to desorb the incoming gas in enclosure 300, while another amount of activated metallic silver cathodically can be placed elsewhere in enclosure 300 to desulfurize the recycled gas from this enclosure 300.
- the enclosure 300 is a showcase. As illustrated in Figure 1, in in this case, the enclosure 300 comprises a window 305, behind which are exposed silver objects 1, on a shelf 5.
- a purification device 100 is placed in the display case 300, with an entry grid 12 communicating with the outside of this display case 300.
- the gas to be purified enters the apparatus 100, passes through an extractable cassette 200 containing the silver cathodically activated metal and constitutes the environment for silver objects 1 to be protected (arrow in broken lines). Crossing the cassette 200, the sulfur compounds are retained on metallic silver cathodically activated. The environment of silver objects exhibited in the display case 300 is thus removed.
- the purification device 100 for implementing the method according to the invention can be adjustable in terms of extraction power and air circulation. So these dimensions are variable, depending on whether you want to purify an enclosure with a volume of 1 to 10 m 3 or an enclosed storage room of several tens of cubic meters.
- this one is a small module. It essentially comprises a cover 30 sealed, extractor fan 50 and extractable cassettes 200, 210, 220, 230 ( Figures 5 and 6).
- the cover 30 is generally an elongated rectangular parallelepiped.
- the inlet face 10 is provided with a grid inlet 12 for stale gas.
- the outlet face 20 is provided with flaps 22.
- One 14 of the faces perpendicular to the inlet face 10 and to the outlet face 20 is provided with a handle 40.
- One 16 of the faces perpendicular to the face inlet 10 and outlet face 20, adjacent to face 14 provided with the handle 40, includes openings suitable for receiving the cassettes 200, 210, 220, 230.
- an electrical power outlet 60 and a switch 70 are arranged on this same face 16.
- the input face 10 and the face of outlet 20 have the approximate dimensions 130 mm x 160 mm.
- the fan 50 is electrically powered and ensures the extraction and air circulation. As shown in FIG. 6, this fan 50 is located inside the cover 30, near the outlet face 20. This fan 50 puts all of the extractable cassettes 200 under vacuum, 210, 220, 230 placed upstream of it. Fan 50 diffuses gas purified to flaps 22.
- a fan 50 whose approximate dimensions are 119 x 119 x 32 mm 3 . It will be powered by direct current at a voltage of 12 volts (delivered by a battery for a stand-alone device or by a transformer connected to 220 volts mains) for a power of 1.2 W (1,550 rpm). Its flow will then be around 95 m 3 / h. It will have a noise level of 30 dB.
- the purification device 100 can include a flap device 22 oriented upwards to ensure the air circulation of the enclosure 300, when for example, the apparatus 100 is arranged on the bottom wall of the enclosure 300 (FIG. 7a).
- the flaps 22 can be oriented downwards when the purification device 100 is placed at a height (FIG. 7b).
- the purification device 100 it is portable.
- the purification device 100 can include casters to facilitate transport.
- the purification device 100 comprises at least one cassette 200 containing cathodically activated metallic silver which advantageously has a large surface specific.
- This silver is in the form of wool, felt or foam silver. This money fixes the sulfur compounds. It can be delivered as of consumable in waterproof plastic bags.
- the money is for example under form of compacted wool 150
- This wool 150 is inserted into a retaining frame 160.
- the assembly consisting of frame 160 and the wool 150 is introduced into the purification device 100 by means of rails sliding 170 fixed horizontally in the latter.
- the cassette 200 loaded with wool, felt or cathodically activated silver foam is itself delivered under form of consumable, in waterproof plastic bags.
- a such cassette can also be returned to the manufacturer who can judge the opportunity to cathodically reactivate its content (in the context of a maintenance contract, for example).
- the cathodic activation of a cassette 200 is therefore carried out on 200 new cassettes or to recycle.
- Wool, felt or silver foam consists of purified silver 99.9% or an alloy where the concentration of silver is higher or equal to 90%.
- the specific surface of wool, felt or silver foam is approximately 100 cm 2 / g.
- a cassette 200 for the purification device 100 preferably contains 10 g of silver, which represents a total surface area of deployed silver of approximately 1000 cm 2 .
- Such a cassette 200 can fix 0.1 g of sulfide.
- Electrochemical assembly for the implementation of the process cathodic activation of silver is shown in Figure 9.
- This mounting preferably includes an electrolytic cell 400 containing an electrolytic bath, a stabilized power supply 410, a 420 voltmeter, a 430 stainless steel grid, an electrode reference 440.
- the electrolytic bath is constantly mixed with agitators 450.
- the positive terminal of the stabilized power supply 410 is connected to the grid 430, while its negative terminal is connected to silver wool via, for example, the conductive holding frame 160 of a cassette 200.
- the potential is measured using the 420 voltmeter between the electrode reference 440 and the silver wool via the retaining frame 160.
- the cassette 200 is fully immersed in the electrolytic bath.
- the nature of the electrolysis bath can be a solution of carbonate (Na 2 CO 3 ), sodium or potassium sulphate (Na 2 SO4, K 2 SO4) of sodium chloride (NaCI), etc., with a concentration between 0.1 and 1 mol / l, in pH ranges between 6 and 8.
- Electrolysis currents to cathodically activate a cassette 200 such as the one whose characteristics were specified above is lie in a range from 100 mA to 1A.
- the amount of current (or the duration of electrolysis) is related to the quantity of product to be treated.
- a wool sample is shown cathodically activated 162 and a sample of non-activated wool 164, after 4 min of sulfurization.
- Cathodically activated wool 162 has been much darker during sulfurization than unactivated wool 164.
- Cathodically activated wool 162 therefore fixed much more sulfur compounds as unactivated wool, which highlights the increased efficiency of cathodically activated silver wool 162 and the importance of the cathodic activation process.
- Figure 11 also shows a wool sample cathodically activated 162 and a sample of non-activated wool 164, after 65 hours of sulfurization, the result is similar to the previous one, which shows that cathodic activation has a lasting effect.
- these cassettes 200 can be fitted with saturation sensors.
- These can be sensors optoelectronics, color-changing chemical sensors, electrochemical sensors, sensors sensitive to conductivity, pH or depression.
- a saturation indicator 205 consisting of a transparent sight, is arranged on the face of the cassette 200, visible on the face 16 of the purification device 100. This look makes it possible to observe the content of metallic silver with a large specific surface, contained in the cassette 200 to check its saturation state. Such indicators of saturation 205 is not always necessary, as is the case, when procedures for systematic change of cassettes 200 are drawn up after preliminary study.
- the fixing of sulfur compounds can be carried out by circulation gas from the enclosure 300 into the purification device 100 introduced therein.
- This purification device 100 does not put air in the enclosure 300 (display case exposure for example) in depression and therefore does not cause perpetual introduction of pollutants.
- cassettes 210 for filtering dust or cassettes 220, 230 containing various filters capable of specifically fixing other species pollutants or even humidity can contain other filter substances than activated metallic silver cathodically.
- These substances are for example activated carbon, zeolites, carbonate pellets or alkali hydroxides (with retention for deliquescent products), zinc oxide, sieves molecular, etc.
- the 200 cassettes are extracted from their packaging waterproof and slid into slide rack supports.
- the device treatment plant 100 is then energized and an optional hour meter is triggered.
- cassettes 200 After a certain operating time (for example after 6 months), an in-depth expertise can be carried out on the content of cassettes 200.
- Additional control and measurement devices can also be installed for the establishment of this in-depth diagnosis, in order to optimize the operation of the purification device 100 according to the invention, as a means for fixing sulfur compounds and so to prevent tarnishing and corrosion of silver metallic objects.
- a purification device 100 is particularly suitable for eliminate polluting gaseous molecules from the gases supplying the atmosphere of display cases.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Chemically Coating (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Gas Separation By Absorption (AREA)
- Catalysts (AREA)
Description
| D'après FRANEY (1985): « The corrosion of silver by atmospheric sulfurous gases », Corrosion Science, Vol 25, n°2. | ||||
| Polluants | OCS | SO2 | H2S | CS2 |
| Concentration Moyenne En ppb | 0,5 | 0,1 | 0,03 | 0,03 |
- la figure 1 est une représentation, en perspective, avec arrachement partiel d'une paroi de côté et du dos, d'une vitrine d'exposition d'objets argentés, dont l'atmosphère est désoufrée par le procédé selon l'invention ;
- la figure 2 représente schématiquement, en coupe longitudinale, un exemple d'enceinte compatible avec l'utilisation du procédé selon l'invention ;
- la figure 3 représente schématiquement, en coupe longitudinale un autre exemple d'enceinte compatible avec l'utilisation du procédé selon l'invention ;
- la figure 4 illustre schématiquement encore un autre exemple de mise en oeuvre du procédé selon l'invention ;
- la figure 5 représente en perspective un exemple d'appareil d'épuration pour la mise en oeuvre du procédé selon l'invention ;
- la figure 6 représente schématiquement, une coupe longitudinale de l'appareil d'épuration représenté à la figure 5 ;
- la figure 7 représente schématiquement deux exemples de positions possibles pour placer un appareil d'épuration tel que celui représenté sur les figures 5 et 6 ; sur la figure 7a, des volets placés à la sortie de cet appareil sont orientés vers le haut ; sur la figure 7b, ces volets sont orientés vers le bas ;
- la figure 8 représente schématiquement la structure et l'agencement d'une cassette pour la mise en oeuvre du procédé selon l'invention ;
- la figure 9 représente schématiquement un dispositif pour activer cathodiquement l'argent métallique nécessaire à la mise en oeuvre du procédé selon l'invention ;
- la figure 10 est une photographie de deux échantillons de laine d'argent soumis à sulfuration, pendant 4 mn ; l'un des échantillons a été préalablement activé cathodiquement et l'autre pas ; et
- la figure 11 est une photographie de deux échantillons de laine d'argent soumis à sulfuration pendant 65 heures ; l'un des échantillons a été préalablement activé cathodiquement, l'autre pas,
- dépoussiérer, la laine, le feutre ou la mousse d'argent brut de réception par soufflage puis trempage dans un bain aqueux de tensioactifs avec des ultrasons ;
- dégraisser dans de l'acétone ;
- rincer dans de l'éthanol et de l'eau ;
- immerger dans une cellule électrolytique 400 à trois électrodes avec un électrolyte neutre, cet argent métallique ou une cassette 200 contenant cet argent métallique ;
- procéder à un balayage cathodique en potentiel avec enregistrement de l'intensité en fonction du potentiel, de la solution électrolytique à température ambiante, depuis un potentiel d'immersion jusqu'au potentiel de réduction des polluants présents à la surface de l'argent ;
- réduire totalement, à température ambiante, les espèces par maintien potentiostatique au potentiel de réduction ;
- rincer, sécher rapidement, conditionner sous gaz neutre et encapsuler sous feuilles de matière plastique thermo-soudées étanches, l'argent métallique ou bien encore la cassette 200 contenant cet argent métallique.
- en capacité volumique de traitement ; dans ce cas, les dimensions des cassettes 200 de traitement et du ventilateur 50 sont plus importantes ;
- en capacité qualitative de traitement ; dans ce cas d'autres cassettes spécifiques sont installées grâce à un système de type « rack » dont peut disposer l'appareil d'épuration 100.
Claims (14)
- Procédé de préservation et de conservation d'objets argentés(1) dans lequel on place les objets (1) à conserver sous une atmosphère comprenant un gaz désoufré, caractérisé en ce que le gaz est désoufré au contact d'argent métallique activé cathodiquement.
- Procédé selon la revendication 1, caractérisé par le fait que l'argent métallique est sous une forma présentant une grande surface spécifique.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait que les objets argentés (1) à préserver et conserver sont placés dans une enceinte (300).
- Procédé selon la revendication 3, caractérisé par le fait que l'atmosphère de l'enceinte (300) est maintenue en surpression par rapport à l'extérieur de cette enceinte (300).
- Procédé selon l'une quelconque des revendications 3 et 4, caractérisé par le fait que le gaz de l'enceinte (300) est désoufré avant ou à son entrée dans l'enceinte (300).
- Procédé selon l'une quelconque des revendications 3 à 5, caractérisé en ce que le gaz de l'enceinte (300) subit un recyclage.
- Procédé selon l'une quelconque des revendications 3 à 6, caractérisé par le fait que l'enceinte (300) est une vitrine.
- Enceinte de préservation et de conservation d'objets argentés, caractérisée par le fait qu'elle comprend, placé à l'intérieur, un appareil d'épuration permettant de désoufrer l'atmosphère de l'enceinte grâce à de l'argent métallique activé cathodiquement.
- Enceinte de préservation et de conservation d'objets argentés selon la revendication 8, caractérisée en ce que son appareil d'épuration comprend au moins une cassette (200) contenant de l'argent métallique activé cathodiquement.
- Enceinte de préservation et de conservation d'objets argentés, selon l'une des revendications 8 et 9 caractérisée en ce que l'argent métallique activé cathodiquement est sous forma de laine (150).
- Enceinte de préservation et de conservation d'objets argentés selon l'une des revendications 9 et 10, caractérisée en ce que son appareil d'épuration (100) comprend des cassettes (210, 220, 230) contenant d'autres substances filtrantes que de l'argent métallique activé cathodiquement.
- Enceinte de préservation et de conservation d'objets argentés selon l'une des revendications 8 à 11, caractérisée en ce que son appareil d'épuration (100) est muni d'un indicateur de saturation (205) de l'argent métallique.
- Enceinte de préservation et de conservation d'objets argentés selon la revendication 12, caractérisée en ce que l'indicateur de saturation (205) est un regard transparent permettant d'observer la couleur de l'argent métallique.
- Enceinte de préservation et de conservation d'objets argentés selon l'une des revendications 8 à 13, caractérisée en ce que son appareil d'épuration (100) est portatif.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9800420 | 1998-01-16 | ||
| FR9800420A FR2773821B1 (fr) | 1998-01-16 | 1998-01-16 | Procede de conservation d'objets argentes et appareil d'epuration pour sa mise en oeuvre |
| PCT/FR1999/000071 WO1999036161A1 (fr) | 1998-01-16 | 1999-01-15 | Procede de conservation d'objets argentes et appareil d'epuration pour sa mise en oeuvre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1054721A1 EP1054721A1 (fr) | 2000-11-29 |
| EP1054721B1 true EP1054721B1 (fr) | 2003-04-09 |
Family
ID=9521842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99900931A Expired - Lifetime EP1054721B1 (fr) | 1998-01-16 | 1999-01-15 | Procede de conservation d'objets argentes et appareil d'epuration pour sa mise en oeuvre |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1054721B1 (fr) |
| AT (1) | ATE236703T1 (fr) |
| DE (1) | DE69906705T2 (fr) |
| ES (1) | ES2191410T3 (fr) |
| FR (1) | FR2773821B1 (fr) |
| WO (1) | WO1999036161A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6551552B1 (en) * | 2000-09-27 | 2003-04-22 | Cor/Sci Llc | Systems and methods for preventing and/or reducing corrosion in various articles |
| KR20040007265A (ko) * | 2002-07-12 | 2004-01-24 | 닛폰 에쿠스란 고교 가부시키가이샤 | 금속의 변색 방지재 |
| NO20063247L (no) * | 2006-07-12 | 2008-01-14 | Norsk Hydro As | Beskyttelse av prosessutstyr som har et vesentlig damptrykk ved a tilsette en fordampende komponent til gassen som er i kontakt med det nevnte utstyret |
| FR2933879B1 (fr) * | 2008-07-15 | 2010-07-30 | Saint Gobain Quartz Sas | Filtre a particules a media filtrant mineral |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913329C2 (de) * | 1979-04-03 | 1984-11-22 | Dechema Deutsche Gesellschaft F. Chem. Apparatewesen E.V., 6000 Frankfurt | Verfahren zur Abscheidung von Spuren gasförmiger Schadstoffe auf Basis von Schwefel aus Abgasen durch chemische Absorption |
| US5451268A (en) * | 1993-11-15 | 1995-09-19 | Shepherd; Samuel L. | Process for the removal of sulfur from silver |
-
1998
- 1998-01-16 FR FR9800420A patent/FR2773821B1/fr not_active Expired - Fee Related
-
1999
- 1999-01-15 WO PCT/FR1999/000071 patent/WO1999036161A1/fr not_active Ceased
- 1999-01-15 ES ES99900931T patent/ES2191410T3/es not_active Expired - Lifetime
- 1999-01-15 AT AT99900931T patent/ATE236703T1/de active
- 1999-01-15 EP EP99900931A patent/EP1054721B1/fr not_active Expired - Lifetime
- 1999-01-15 DE DE69906705T patent/DE69906705T2/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69906705T2 (de) | 2003-11-13 |
| FR2773821B1 (fr) | 2000-04-07 |
| FR2773821A1 (fr) | 1999-07-23 |
| DE69906705D1 (de) | 2003-05-15 |
| ATE236703T1 (de) | 2003-04-15 |
| ES2191410T3 (es) | 2003-09-01 |
| EP1054721A1 (fr) | 2000-11-29 |
| WO1999036161A1 (fr) | 1999-07-22 |
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