NO118886B - - Google Patents
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- NO118886B NO118886B NO16515666A NO16515666A NO118886B NO 118886 B NO118886 B NO 118886B NO 16515666 A NO16515666 A NO 16515666A NO 16515666 A NO16515666 A NO 16515666A NO 118886 B NO118886 B NO 118886B
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- Prior art keywords
- tin
- waste
- iron
- electrolysis
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- Prior art date
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 67
- 239000002699 waste material Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 19
- 238000010257 thawing Methods 0.000 claims description 16
- 239000002966 varnish Substances 0.000 claims description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 4
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 3
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 description 79
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 36
- 235000011121 sodium hydroxide Nutrition 0.000 description 23
- 238000005868 electrolysis reaction Methods 0.000 description 20
- 229910052742 iron Inorganic materials 0.000 description 18
- -1 nonylphenyl- Chemical group 0.000 description 18
- 238000002474 experimental method Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- NNIPDXPTJYIMKW-UHFFFAOYSA-N iron tin Chemical compound [Fe].[Sn] NNIPDXPTJYIMKW-UHFFFAOYSA-N 0.000 description 6
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 4
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- COBPKKZHLDDMTB-UHFFFAOYSA-N 2-[2-(2-butoxyethoxy)ethoxy]ethanol Chemical compound CCCCOCCOCCOCCO COBPKKZHLDDMTB-UHFFFAOYSA-N 0.000 description 1
- MXVMODFDROLTFD-UHFFFAOYSA-N 2-[2-[2-(2-butoxyethoxy)ethoxy]ethoxy]ethanol Chemical compound CCCCOCCOCCOCCOCCO MXVMODFDROLTFD-UHFFFAOYSA-N 0.000 description 1
- AZYICGMHYYVGBY-UHFFFAOYSA-N 2-[2-[2-[2-(2-butoxyethoxy)ethoxy]ethoxy]ethoxy]ethanol Chemical compound CCCCOCCOCCOCCOCCOCCO AZYICGMHYYVGBY-UHFFFAOYSA-N 0.000 description 1
- UMUSOTNGYAALST-UHFFFAOYSA-N 2-[2-[2-[2-(2-phenylmethoxyethoxy)ethoxy]ethoxy]ethoxy]ethanol Chemical compound OCCOCCOCCOCCOCCOCC1=CC=CC=C1 UMUSOTNGYAALST-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D9/00—Chemical paint or ink removers
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
Description
Fremgangsmåte til fjerning av lakk fra lakkert hvitblikk. Procedure for removing lacquer from lacquered white tin.
Oppfinnelsen vedrører en fremgangsmåte til fjerning avThe invention relates to a method for removing
lakk fra lakkert hvitblikk, spesielt hvitblikkavfall.varnish from varnished tin, especially tin waste.
For fremstilling av metallisk tinn spiller ved siden av smeltningen av tinnmalmen gjenvinningen av metallet fra avfall av fortinnet jernblikk, såkalt hvitblikk en vesentlig rolle. For the production of metallic tin, next to the smelting of the tin ore, the recovery of the metal from waste tinned iron tin, so-called white tin, plays an important role.
Gjenvinning av tinn fra hvitblikkavfall som tidligere foregikk ifølge kloravtinningsfremgangsmåten gjennomføres idag i det vesentlige etter den elektrolytiske fremgangsmåte i alkalisk medium eller ved utløsning av. tinnet ved hjelp av natronlut i nærvær av oksydasjonsmidler og etterfølgende elektrolytisk utskillelse. Avtinning av lakkert hvitblikkavfall etter de nettopp nevnte fremgangsmåter er delvis forbundet med betraktelige ulemper ved for-arbeidelsen av ikke lakkerte, fortinnede jernblikk, alt etter lakk-påføring. Recycling of tin from white tin waste, which previously took place according to the chlorine detinning method, is now essentially carried out according to the electrolytic method in an alkaline medium or by dissolution of. tinned using caustic soda in the presence of oxidizing agents and subsequent electrolytic precipitation. De-tinning of painted white tin waste according to the methods just mentioned is partly associated with considerable disadvantages in the processing of unpainted, tinned iron tin, depending on the application of paint.
Således må det ved umiddelbar avtinning av lakkert hvitblikkavfall, uten egnet forbehandling tas med på kjøpet dårligere avtinning, dermed tvangsmessig forbundet dårligere avfallskvaliteter, dessuten ekstra forbruk av oksydasjonsmidler og ikke minst større mengder tid og energi. Thus, in the case of immediate thawing of painted white tin waste, without suitable pre-treatment, poorer thawing must be included in the purchase, thus inevitably associated with poorer waste qualities, in addition to additional consumption of oxidizing agents and, not least, greater amounts of time and energy.
I fra US-patent nr. 3.058.918 er det kjent til fjerningIn US patent no. 3,058,918 it is known to remove
av lakk å anvende 2 til 15 vektprosent polyetylenglykoler i form av vandige alkaliske oppløsninger. Ifølge oppfinnelsen anvendes imidlertid monoetérpolyetylenglykoler, og disse er betraktelig mer virksomme således at man også kan anvende vesentlig mindre mengder. Høye innhold av polyetylenglykoler ville ved den elektrolytiske avtinning virke meget forstyrrende. of varnish to use 2 to 15 percent by weight of polyethylene glycols in the form of aqueous alkaline solutions. According to the invention, however, monoether polyethylene glycols are used, and these are considerably more effective so that significantly smaller amounts can also be used. High contents of polyethylene glycols would be very disruptive during electrolytic thawing.
Til grunn for oppfinnelsen ligger således den oppgave å tilveiebringe en fremgangsmåte som muliggjør å fjerne lakksjikt fra hvitblikk og derved å oppnå en gunstigere avtinning og et høyverdig avfall. The invention is thus based on the task of providing a method which makes it possible to remove the varnish layer from white tin and thereby achieve a more favorable thawing and a high-quality waste.
Oppfinnelsen vedrører altså en fremgangsmåte til fjerningThe invention therefore relates to a method for removal
av lakk fra lakkerte hvitblikk, spesielt hvitblikkavfall, ved innvirkning av vandige bad inneholdende fra 2 til 150 g/liter natriumhydroksy- og/eller natriumkarbonatholdige oppløsninger ved temperaturer mellom 50 og 100°C, idet fremgangsmåten erkarakterisert veden tilsetning av forbindelser med den generelle formel of varnish from varnished white tin, especially white tin waste, by the action of aqueous baths containing from 2 to 150 g/litre of sodium hydroxy and/or sodium carbonate-containing solutions at temperatures between 50 and 100°C, the method being characterized by the addition of compounds of the general formula
1 2hvori R betyr en alkyl-, aryl-, alkaryl- eller aralkylrest og R betyr en metyl- eller etylrest eller et hydrogenatom og x er et tall fra 1 til 25, idet man anvender oppløsninger med 0,05 - 2,0 vektprosent, fortrinnsvis 0,1 - 1,0 vektprosent polyalkylen-glykol-monoeter. 1 2 in which R means an alkyl, aryl, alkaryl or aralkyl residue and R means a methyl or ethyl residue or a hydrogen atom and x is a numbers from 1 to 25, using solutions with 0.05 - 2.0% by weight, preferably 0.1 - 1.0% by weight polyalkylene glycol monoether.
Er R<1>en alkylrest, så kan denne f.eks. ha betydningen av en metyl-, etyl-, propyl-, isopropyl-, butyl-, isobutyl-, pentyl-, oktyl- eller dodecylrest. Er R<1>en arylrest, så er fenylresten foretrukket. Som alkarylrest er foretrukket oktylfenyl-, nonylfenyl- If R<1> is an alkyl residue, then this can e.g. have the meaning of a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, octyl or dodecyl residue. If R<1> is an aryl residue, then the phenyl residue is preferred. As an alkaryl residue, octylphenyl-, nonylphenyl-
og dodecylfenylresten, Som eksempel på en aralkylrest kan det nevnes den fra benzylalkohol avledede rest. and the dodecylphenyl residue. As an example of an aralkyl residue, mention may be made of the residue derived from benzyl alcohol.
Spesielt virksomme forbindelser er de hvor R<1>er en butyl-rest, R er et hydrogenatom og x = 1 til 10. Particularly effective compounds are those where R<1> is a butyl residue, R is a hydrogen atom and x = 1 to 10.
Forbindelsene som innvirker ifølge oppfinnelsen lar seg fremstille på i og for seg kjent måte ved tilleiring av alkylenoksyder på de tilsvarende hydroksylforbindelser. Som alkylenoksyd kommer spesielt på tale etylenoksyd og propylenoksyd. Det kan også tilleires blandinger av forskjellige alkylenoksyder. Ved et slikt produkt kan R p f.eks. såvel ha betydningen av en metylrest som et hydrogenatom. The compounds which have an effect according to the invention can be prepared in a manner known per se by adding alkylene oxides to the corresponding hydroxyl compounds. Examples of alkylene oxide include ethylene oxide and propylene oxide. Mixtures of different alkylene oxides can also be added. With such a product, R p can e.g. both have the meaning of a methyl residue and a hydrogen atom.
Ved gjennomføring av fremgangsmåten ifølge oppfinnelsen foregår en slik fysikalsk og kjemisk innvirkning på lakkovertrekket at den på blikket befinnende lakk, som f.eks. slike på basis av poly-vinylklorid, epoksydharpiks, fenolharpiks, alkydharpiks, modifisert alkydharpiks etter tilstrekkelig innvirkningstid sveller opp og i de fleste tilfeller løser seg fra hvitblikket. Herved oppnås at det egentlige avtinningsmedium uhindret og fullt kan innvirke på tinn-belegget på jernblikk. When carrying out the method according to the invention, such a physical and chemical effect takes place on the varnish coating that the varnish on the tin, such as e.g. those based on polyvinyl chloride, epoxy resin, phenolic resin, alkyd resin, modified alkyd resin after sufficient exposure time swell up and in most cases dissolve from the white tin. Hereby it is achieved that the actual defrosting medium can act unhindered and fully on the tin coating on iron tin.
Det er av spesiell fordel å foreta innvirkningen ved for-høyede temperaturer da herved innvirkningstiden kan nedsettes betraktelig. Spesielt har det vist seg hensiktsmessig å la natrium-hydroksyd og/ell<p>r natriumkarbonatholdige oppløsninger av forbindelsene som skal anvendes ifølge oppfinnelsen innvirke ved temperaturer mellom 50 og 100°C på det lakkerte hvitblikk. It is of particular advantage to carry out the impact at elevated temperatures, as this can reduce the impact time considerably. In particular, it has proven appropriate to let sodium hydroxide and/or sodium carbonate-containing solutions of the compounds to be used according to the invention act at temperatures between 50 and 100°C on the lacquered white tin.
Forbindelsene som anvendes ifølge oppfinnelsen er allerede virksomme i mengder på mindre enn 2,0 vektprosent, beregnet på alkalisk oppløsning. Fortrinnsvis setter man til oppløsningene 0,01 - 1,0 vektprosent. Ved tilsvarende innhold av glykoleter øker avlakningsevnen med lutkonsentrasjonen. Ved fremgangsmåten ifølge oppfinnelsen vil man derfor hensiktsmessig og fortrinnsvis arbeide med oppløsninger som inneholder ca. 2 - 150 g natriumhydroksyd/liter. Fremgangsmåten ifølge oppfinnelsen kan gå forut for den egentlige avtinning som f.eks. utløsning av tinnet ved hjelp av natronlut i nærvær av oksydasjonsmidler. I dette tilfelle er det hensiktsmessig å holde lutkonsentrasjonen av lakkfjerningsoppløsningen som skal anvendes ifølge oppfinnelsen lavest mulig for å unngå en for tidlig utløsning av tinn. The compounds used according to the invention are already effective in amounts of less than 2.0% by weight, calculated for alkaline solution. Preferably, 0.01 - 1.0% by weight is added to the solutions. With a corresponding content of glycol ether, the dechlorination ability increases with the lye concentration. With the method according to the invention, one will therefore appropriately and preferably work with solutions containing approx. 2 - 150 g sodium hydroxide/litre. The method according to the invention can precede the actual thawing, which e.g. release of the tin using caustic soda in the presence of oxidizing agents. In this case, it is appropriate to keep the lye concentration of the varnish removal solution to be used according to the invention as low as possible to avoid a premature release of tin.
Spesielt fordelaktig er imidlertid lakkfjerningsfrem-gangsmåten ifølge oppfinnelsen fir den elektrolytiske avtinning i alkalisk medium. Da det ved de vanlige utførelsesformer av den elektrolytiske avtinningsfremgangsmåte i alkalisk medium kreves avtinningstider på 2 og flere timer oppnås eksempelvis ve" tilsetning av inntil ca. 0,7 vektprosent di-, tri-, tetra- eller pentaetylen-glykolmonobutyleter, eller pentaetylenglykolbenzyleter til avtinnings-luten under elektrolysen ved ca. 80°C i løpet av 2 timer, ofte allerede en 1/2 time, en fullstendig avlakking av de enkelte lakkerte hvitblikkavfall. Da glykoleterene ikke angripes under elektrolysen må bare den for den egentlige lakkfjerning nødvendige mengde kontinu-erlig tilføres. Lakkfjerningen ifølge oppfinnelsen er ved elektrolytiske avtinningsfremgangsmåter i alkalisk medium spesielt økonomisk da det hverken kreves ekstra investeringer eller ytterligere frem-gangsmåtetrinn eller ekstra arbeidstid. Particularly advantageous, however, is the varnish removal method according to the invention for electrolytic thawing in an alkaline medium. Since in the usual embodiments of the electrolytic defrosting method in an alkaline medium, defrosting times of 2 or more hours are required, for example the addition of up to about 0.7% by weight of di-, tri-, tetra- or pentaethylene glycol monobutyl ether, or pentaethylene glycol benzyl ether for defrosting is achieved -the lye during the electrolysis at approx. 80°C within 2 hours, often already 1/2 hour, a complete stripping of the individual varnished white tin waste. As the glycol ethers are not attacked during the electrolysis, only the amount necessary for the actual varnish removal must be continuously The varnish removal according to the invention is particularly economical in the case of electrolytic thawing methods in an alkaline medium, as neither additional investments nor additional process steps or extra working time are required.
Fremgangsmåten ifølge oppfinnelsen skal i det følgende for-klares nærmere ved hjelp av noen eksempler. The method according to the invention will be explained in more detail in the following with the help of some examples.
Eksempel 1.Example 1.
200 g lakkert hvitblikkavfall med 0, 5^% Sn behandles i et egnet glass- resp. jernkar i 2 timer med 2 liter avlakkingsoppløsning, som inneholder 20 g dietylenglykolmonobutyleter og 2 g etsnatron pr. liter ved 80°C. Etter lakkfjerningen avtinnes hvitblikkavfallet ved hjelp av 1 1/2 times behandling med en lut, som inneholder 50 g NaOH/liter og 15 g NaN02/liter. Resttinninnholdet av det avtinnede jernblikk utgjorde 0, 15% Sn. 200 g of painted white tin waste with 0.5^% Sn is processed in a suitable glass or iron vessel for 2 hours with 2 liters of stripping solution, which contains 20 g of diethylene glycol monobutyl ether and 2 g of caustic soda per liter at 80°C. After the varnish removal, the tin waste is thawed using a 1 1/2 hour treatment with a lye, which contains 50 g NaOH/litre and 15 g NaN02/litre. The residual tin content of the de-tinned iron tin amounted to 0.15% Sn.
Sammenligningsforsøk.Comparison experiment.
200 g lakkert hvitblikkavfall (samme type som i eksempel 1) ble uten behandling med en lakkfjerningsoppløsning direkte avtinnet. Resttinninnholdet i det avtinnede jernblikk utgjorde 0,36$ Sn. Eksempel 2. 200 g of varnished white tin waste (same type as in example 1) was directly thawed without treatment with a varnish removal solution. The residual tin content in the de-tinned iron tin amounted to 0.36$ Sn. Example 2.
2,5 kg lakkert hvitblikkavfall med 0, 5^% Sn bringes i en jernkurv i et jernavtinningsbad (innhold 47 liter), hvori det sirkuleres en lut (100 g NaOH/liter, 70 g Na^O^/liter og 7 g dietylenglykolmonobutyleter/liter). Den med lakkerte hvitblikkavfall fylte jernkurv er under elektrolysen anode, mens to jernblikk fungerer som katode. Etter to timers elektrolyse (strømtetthet: 11 Amp./m katodeflate) ved 80°C utgjorde resttinninnholdet av de opprinnelig lakkerte blikkavfall, 0,05% Sn. 2.5 kg of painted white tin waste with 0.5^% Sn is placed in an iron basket in an iron thawing bath (content 47 litres), in which a lye (100 g NaOH/litre, 70 g Na^O^/litre and 7 g diethylene glycol monobutyl ether) is circulated /liter). The iron basket filled with lacquered white tin waste is the anode during the electrolysis, while two iron tins act as the cathode. After two hours of electrolysis (current density: 11 Amp./m cathode surface) at 80°C, the residual tin content of the originally varnished tin waste amounted to 0.05% Sn.
Sammenligningsforsøk.Comparison experiment.
Det ble arbeidet ifølge eksempel 2, imidlertid uten dietylenglykolmonobutyleter. Etter 2 timers elektrolyse utgjorde rest-innholdet 0,46$ Sn. The work was carried out according to example 2, however without diethylene glycol monobutyl ether. After 2 hours of electrolysis, the residual content amounted to 0.46$ Sn.
Eksempel 3.Example 3.
2,5 kg lakkert hvitblikkavfall med 0,73% Sn, ble forarbeidet som angitt i eksempel 2. Luten inneholdt imidlertid i stedet for 7 g dietylenglykolmonobutyleter 20 g dietylenglykolmonometyleter pr. liter. Etter 2 timers elektrolyse utgjorde resttinninnholdet av det opprinnelig lakkerte blikkavfall 0,02% Sn. Sammenligningsforsøk. 2.5 kg of lacquered white tin waste with 0.73% Sn was processed as indicated in example 2. However, instead of 7 g of diethylene glycol monobutyl ether, the lye contained 20 g of diethylene glycol monomethyl ether per litres. After 2 hours of electrolysis, the residual tin content of the originally varnished tin waste amounted to 0.02% Sn. Comparison experiment.
Det ble arbeidet overensstemmende med eksempel 3, imidlertid uten dietylenglykolmonometyleter. Etter 2 timers elektrolyse utgjorde resttinninnholdet 0,31% Sn. The procedure was carried out in accordance with example 3, but without diethylene glycol monomethyl ether. After 2 hours of electrolysis, the residual tin content was 0.31% Sn.
Eksempel 4.Example 4.
200 g lakkert hvitblikkavfall med 0,48% tinn blir i et egnet glass- resp. jernkar oppvarmet i 2 timer med 2 liter av en 1%-ig opp-løsning av polyoksyetylenbutyleter (butylpentaglykol) i vann ved 100°C. Etter lakkfjerning ble hvitblikkavfallene avtinnet ved hjelp av 2 timers behandling med en lut, som inneholdt 80 g NaOH/liter og 15 g NaN02/liter. Det avtinnede jernblikks resttinninnhold utgjorde 0,2% Sn. 200 g of lacquered white tin waste with 0.48% tin is placed in a suitable glass or iron vessel heated for 2 hours with 2 liters of a 1% solution of polyoxyethylene butyl ether (butyl pentaglycol) in water at 100°C. After varnish removal, the white tin waste was thawed by means of a 2-hour treatment with a lye, which contained 80 g NaOH/litre and 15 g NaN02/litre. The residual tin content of the de-tinned iron tin amounted to 0.2% Sn.
Sammenligningsforsøk.Comparison experiment.
200 g lakkert hvitblikkavfall ble oppvarmet 2 timer i rent vann ved 100°C og deretter avtinnet ifølge det som er angitt i eksempel 1. Resttinninnholdet utgjorde 0,35%« 200 g of painted white tin waste was heated for 2 hours in clean water at 100°C and then de-tinned according to what is stated in example 1. The residual tin content was 0.35%"
Eksempel 5.Example 5.
2 kg lakkert hvitblikkavfall med 0,85% tinn ble bragt i en jernkurv i et jernavtinningsbad, innhold 45 liter, hvori det ble pumpet rundt en lut (76 g NaOH/liter, 50 g Na2C0.j/l,7 g Sn/liter og 2 g polyoksyetylen-butyleter (butylpentaglykol)). Den med lakkert hvitblikkavfall fylte jernkurv er under elektrolysen anode, mens to jernblikk virker som katode. Etter to timers elektrolyse (strømtett-het: 100 Amp./m^ katodeflate) ved 95°C utgjorde resttinninnholdet av den opprinnelig lakkerte blikkavfall 0,01% Sn. 2 kg of painted white tin waste with 0.85% tin was placed in an iron basket in an iron thawing bath, content 45 litres, into which was pumped around a lye (76 g NaOH/litre, 50 g Na2C0.j/l,7 g Sn/litre and 2 g of polyoxyethylene butyl ether (butyl pentaglycol)). The iron basket filled with lacquered white tin waste is the anode during the electrolysis, while two iron tins act as cathode. After two hours of electrolysis (current density: 100 Amp./m^ cathode surface) at 95°C, the residual tin content of the originally varnished tin scrap amounted to 0.01% Sn.
Sammenligningsforsøk.Comparison experiment.
Det ble arbeidet ifølge eksempel 5>imidlertid uten polyoksyetylen-butyleter. Etter 2 timers elektrolyse utgjorde resttinninnholdet 0,77%. The work was carried out according to example 5, however without polyoxyethylene butyl ether. After 2 hours of electrolysis, the residual tin content was 0.77%.
Eksempel 6.Example 6.
2 kg lakkert hvitblikkavfall med 1,07% Sn ble forarbeidet som angitt i eksempel 2 (strømtetthet: 200 Amp/m katodeflate); luten inneholdt imidlertid i stedet for 2 g polyoksyetylenbutyleter 1 g polyoksyetylen-fenyleter/liter. Etter 2 timers elektrolyse ved 75°C utgjorde resttinninnholdet av det opprinnelig lakkerte hvitblikkavfall 0,11%. Sammenligningsforsøk. 2 kg of painted white tin waste with 1.07% Sn was prepared as indicated in example 2 (current density: 200 Amp/m cathode surface); however, instead of 2 g polyoxyethylene butyl ether, the lye contained 1 g polyoxyethylene phenyl ether/litre. After 2 hours of electrolysis at 75°C, the residual tin content of the originally lacquered tin waste amounted to 0.11%. Comparison experiment.
Det ble arbeidet ifølge eksempel 6, imidlertid uten polyoksyetylen-f enyleter . Etter 2 timers elektrolyse utgjorde resttinninnholdet 0,65%. The work was carried out according to example 6, however without polyoxyethylene-phenyl ether. After 2 hours of electrolysis, the residual tin content was 0.65%.
Eksempel 7.Example 7.
2 kg lakkert hvitblikkavfall med 1,07% Sn, ble forarbeidet som i eksempel 2, (strømtetthet: 200 Amp/m katodeflate); luten inneholdt imidlertid i stedet for 2 g polyoksyetylen-butyleter 1 g polyoksyetylen-nonylfenyleter/liter. Etter 2 timers elektrolyse ved 75°C utgjorde resttinninnholdet av de opprinnelige lakkerte hvitblikkavfall 0,41%. 2 kg of painted white tin waste with 1.07% Sn was processed as in example 2, (current density: 200 Amp/m cathode surface); however, instead of 2 g of polyoxyethylene butyl ether, the lye contained 1 g of polyoxyethylene nonylphenyl ether/litre. After 2 hours of electrolysis at 75°C, the residual tin content of the original lacquered tin waste was 0.41%.
Sammenligningsforsøk.Comparison experiment.
Det ble arbeidet ifølge eksempel 7, imidlertid uten polyoksyetylen-nonylf enyleter . Etter 2 timers elektrolyse utgjorde resttinninnholdet 0,65%. The work was carried out according to example 7, however without polyoxyethylene nonyl phenyl ether. After 2 hours of electrolysis, the residual tin content was 0.65%.
Eksempel 8.Example 8.
2 kg lakkert hvitblikkavfall med 0,27% tinn ble bragt i en jernkurv i et jernavtinningsbad, innhold 45 liter, hvori det ble pumpet rundt en lut /~(76 g NaOH/liter, 50 g Na^O-^/liter, 7 g Sn/ liter) og 2 kg polyoksyetylen-benzyleter (benzylpentaglykol_)/. Den med lakkerte hvitblikkavfall fylte jernkurv er under elektrolysen anode, mens 2 jernblikk virker som katode. Etter to timers elektrolyse (strømtetthet 11 00 Amp/m o katodeflate) ved 75 oC utgjorde resttinninnholdet i de opprinnelig lakkerte blikkavfall 0,012% Sn. Sammenligningsforsøk. 2 kg of painted white tin waste with 0.27% tin was placed in an iron basket in an iron defrosting bath, content 45 litres, into which was pumped around a lye /~(76 g NaOH/litre, 50 g Na^O-^/litre, 7 g Sn/ liter) and 2 kg of polyoxyethylene benzyl ether (benzyl pentaglycol_)/. The iron basket filled with lacquered white tin waste is the anode during the electrolysis, while 2 iron tins act as the cathode. After two hours of electrolysis (current density 11 00 Amp/m o cathode surface) at 75 oC, the residual tin content in the originally lacquered tin waste amounted to 0.012% Sn. Comparison experiment.
Det ble arbeidet ifølge eksempel 8, imidlertid uten polyoksyetylen-benzyleter. Etter 2 timers elektrolyse utgjorde resttinninnholdet 0,19% Sn. The work was carried out according to example 8, however without polyoxyethylene benzyl ether. After 2 hours of electrolysis, the residual tin content was 0.19% Sn.
Eksempel 9.Example 9.
2 kg lakkert hvitblikkavfall med 0,27% tinn bringes i en jernkurv i et jernavtinningsbad, innhold 45 liter, hvori det pumpes rundt en lut =76 g NaOH/liter, 50 g Na2CO-5/liter, 7 g Sn/liter og 2 g polyoksyetylen-oksypropylen-butyleter). Den med lakkert hvitblikkavfall fylte jernkurv er under elektrolysen anode, mens to jernblikk fungerer som katode. Etter 2 timers elektrolyse (strømtetthet: 100 Amp/m^ katodeflate) ved 75°C utgjør resttinninnholdet av det 2 kg of painted white tin waste with 0.27% tin is brought in an iron basket into an iron thawing bath, content 45 litres, into which a lye =76 g NaOH/litre, 50 g Na2CO-5/litre, 7 g Sn/litre and 2 g polyoxyethylene-oxypropylene-butyl ether). The iron basket filled with lacquered white tin waste is the anode during the electrolysis, while two iron tins act as cathode. After 2 hours of electrolysis (current density: 100 Amp/m^ cathode surface) at 75°C, the residual tin content of the
opprinnelig lakkerte blikkavfall 0,016% Sn.originally lacquered tin waste 0.016% Sn.
Sammenligningsforsøk.Comparison experiment.
Det ble arbeidet ifølge eksempel 9, imidlertid uten polyoksyetylen-oksypropylen-butyleter. Etter 2 timers elektrolyse utgjorde resttinninnholdet 0, 19% Sn. The work was carried out according to example 9, however without polyoxyethylene-oxypropylene-butyl ether. After 2 hours of electrolysis, the residual tin content was 0.19% Sn.
Claims (2)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1965G0045270 DE1546126C3 (en) | 1965-11-25 | 1965-11-25 | Stripping of tinplate waste to be detinned |
| DE1966G0047471 DE1621581C3 (en) | 1965-11-25 | 1966-07-20 | Stripping of tinplate waste to be detinned |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO118886B true NO118886B (en) | 1970-02-23 |
Family
ID=25978757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO16515666A NO118886B (en) | 1965-11-25 | 1966-10-14 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE687718A (en) |
| DE (2) | DE1546126C3 (en) |
| NL (1) | NL148929B (en) |
| NO (1) | NO118886B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3534278A1 (en) * | 1985-09-26 | 1987-04-02 | Henkel Kgaa | REMOVING PASTE FOR REMOVING PAINT AND PAINT LAYERS |
| DE19515086A1 (en) * | 1995-04-25 | 1996-10-31 | Hoechst Ag | Process for removing contaminating coatings from metal surfaces |
| DE10124331A1 (en) * | 2001-05-18 | 2002-11-21 | Basf Ag | New mixtures of alkoxylated n- or isobutanols useful as solvents, especially for removing paint from metals |
| CN108624946B (en) * | 2017-03-21 | 2021-03-16 | 上海铝通化学科技有限公司 | Electrolytic paint stripping agent and paint stripping method |
-
1965
- 1965-11-25 DE DE1965G0045270 patent/DE1546126C3/en not_active Expired
-
1966
- 1966-07-20 DE DE1966G0047471 patent/DE1621581C3/en not_active Expired
- 1966-10-03 BE BE687718D patent/BE687718A/xx not_active IP Right Cessation
- 1966-10-14 NO NO16515666A patent/NO118886B/no unknown
- 1966-11-23 NL NL6616473A patent/NL148929B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BE687718A (en) | 1967-03-16 |
| DE1621581B2 (en) | 1973-11-08 |
| DE1546126C3 (en) | 1974-06-27 |
| DE1546126B2 (en) | 1973-11-15 |
| DE1546126A1 (en) | 1970-03-05 |
| NL6616473A (en) | 1967-05-26 |
| DE1621581C3 (en) | 1974-06-12 |
| DE1621581A1 (en) | 1970-07-30 |
| NL148929B (en) | 1976-03-15 |
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