BE555040A - - Google Patents
Info
- Publication number
- BE555040A BE555040A BE555040DA BE555040A BE 555040 A BE555040 A BE 555040A BE 555040D A BE555040D A BE 555040DA BE 555040 A BE555040 A BE 555040A
- Authority
- BE
- Belgium
- Prior art keywords
- cleaning
- parts
- agent according
- cleaning agent
- rhodanate
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000012459 cleaning agent Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 4
- 229940072033 potash Drugs 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 235000015320 potassium carbonate Nutrition 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- 125000005228 aryl sulfonate group Chemical group 0.000 claims description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 150000008052 alkyl sulfonates Chemical class 0.000 claims 1
- 150000007530 organic bases Chemical class 0.000 claims 1
- -1 thiourea compound Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 description 14
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- UMGDCJDMYOKAJW-UHFFFAOYSA-N Thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- SOIFLUNRINLCBN-UHFFFAOYSA-N Ammonium thiocyanate Chemical compound [NH4+].[S-]C#N SOIFLUNRINLCBN-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L Magnesium carbonate Chemical class [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- KIWUVOGUEXMXSV-UHFFFAOYSA-N Rhodanine Chemical compound O=C1CSC(=S)N1 KIWUVOGUEXMXSV-UHFFFAOYSA-N 0.000 description 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Stearin Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Tris Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- HWKQNAWCHQMZHK-UHFFFAOYSA-N Trolnitrate Chemical compound [O-][N+](=O)OCCN(CCO[N+]([O-])=O)CCO[N+]([O-])=O HWKQNAWCHQMZHK-UHFFFAOYSA-N 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 125000001905 inorganic group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000011160 magnesium carbonates Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- PHYFQTYBJUILEZ-IUPFWZBJSA-N triolein Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(OC(=O)CCCCCCC\C=C/CCCCCCCC)COC(=O)CCCCCCC\C=C/CCCCCCCC PHYFQTYBJUILEZ-IUPFWZBJSA-N 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
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
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Les objets de parure et d'usage en argent ou un autre métal précieux ou rare,tels que l'or, le cuivre et analogues ou encore un alliage de ces différents métaux, ainsi que les objets plaqués de. ces métaux subissent au contact d'aliments contenant du soufre,, d'autres madères sulfureuses et spécialement celles conteant de l'hydrogène sulfuré, une altération qui modifie progressivemetn la couleur,, qui passe au brun, puis au noir. En outre,ils se ternissent par oxydation.
Exception faite de la possibilité offerte par la pré- son,ce d'un autre métal, de rendre à ces objets leur aspect naturel par un moyen électrochimique, on assimilait précédemment aux
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agents purement chimiques des poudres et sels particuliers constitués principalement par lastéarine paraffine, oléine, carbonates de calcium et de magnésium. On frottait les objets à nettoyer avec ces poudres, ce qui était une action essentiellement mécanique. Ceci se rapporte également aux pommades à nettoyer analogues qui doivent leur aspect pâteux uniquement à une composition proportionnelle des composants. Les agents liquides pour nettoyage de métal ont une même ou semblagle composition, mais ils contiennent en plus de l'alcool ou une solution ammoniacale.
Tous ces agents de nettoyage ont le désavantage, que la manipulation de chaque pièce à nettoyer nécessite un'frottement, ce qui amène inévitablement des égratignures et des rainures sur les surfaces aes objets à nettoyer. Des solutions de cyanure de potasse, également proposées pour le même but, ont été éliminées dans beaucoup de cas et spécialement dans le ménage en raison de leur grande toxicité.
Il a été établi de façon surprenante qu'une solution acide de combinaisons de rhodanates.tels que des rhodanates de potasse, soude ou ammonium ou d'une solution de combinaisons récentes de thiourée isomère,,nettoie les objets automatiquement en très peu de temps, dépendant du deré de souillure, souvent même en quelques secondes et qu'elle rend aux métaux leur aspect primitif. Il est essentiel pour un nettoyage efficace et rapide d'observer exactement la valeur au pH acide et la concentraionde la combinaison de rhodanates ou de thiourée séparément ou en mélange.
Les composés de rhodanates peuvent aussi se présenter sous la forme de combinaisons salines d'acide rhodanique avec des groupes inorganiques, tels que, par exemple, les rhodanates d'hydrazine et d'hydroxylamine, ou encore avec des groupes or,aniques, tels que le rhodanate de triéthanolamine employés comme tels.
Plus la valeur du pH est -basse, plus rapidement le nettoyage s'accomplit. La mise au point de l'acidité de la solution ou de
<Desc/Clms Page number 3>
mélanges secs des deux ingrédients peut résulter d'acides organiques ou inorganiques ou de leurs sels acides. La concentration du composé de rhodanate dans la solution doit comporter au minimum 2%;puor celle de/thiourée, 15 est déjà suffisant. Toutefois des concentrations de rhodanates d'un pourcentage de 20,30 et plus sont particulièrement recommandées.Pour améliorer l'effet de nettoyage, on peut ajouter au mélange des matières actives de lavage.
Afin d'améiorer l'odeur, il est à conseiller d'ajouter des parfums, qui cependant n'ont aucune influence sur l'effet ae lavage.
Les objets à nettoyer ne sont pratiquement pas attaqués par les solutions des agents de nettoyage et ne présentent ni égratignures ni rainures. Les produits de nettoyage selon le principe de l'invention peuvent être introduits dans le commerce sous forme liquide ou solide ou encore en pâte. Dans cette derniè- re forme commerciale, l'on obtient sa consistance désirée par le fait que l'on introduit dans les mélanges à effet de nettoyage au lieude de la l'eau, occasionellement jusqu'à 90% des polyéthylÇne 'glycols,/bentonite ou d'autres agents de lavage analogues.
EXEMPLE 1 70 parties d'eau
5 parties d'acide sulfurique dilué 1:3
8 parties de thiourée EXEMPLE 2
On plonge pendant 2 minutes un bracelet en argent, souil lé moyennement par des sulfures;, dans une solution se composant de:
40 parties de rhodanate de potasse
2 parties d'acide sulfurique (dilué)
0,1 partie de sulfonate d'aryle,d'acoyl
57,9 parties d'eau.
Après l'avoir sorti, on le rince avec de l'eau et le sèche. Le métal brille à nouveau comme s'il était nouveau.
<Desc/Clms Page number 4>
EXEMPLE 3
On répand un mélange en poudre composé de :
35 parties de rhodanate d'ammonium
7 parties d'acide citrique en poudre
0,1 partie de sulfonate d'aryl alcoyle
10 parties de sulfate de soude anhydre sur un chiffon mouillé, où le mélange est aussitôt vo- ; latilisé, et que l'an utilise pour laver un objet métallique à nettoyer. Après avoir rincé avec de l'eau et séché l'objet, celui- ci à retrouvé son éclat métallique primitif.
EXEMPLE 4
5 parties de thiourée et
5 parties de rhodanate d'ammonium sont mélangées avec:
60 parties d'eau et le pH désiré est ajusté au moyen d'acide citrique. A cette , fin, l'on utilise 5 parties d'acide citrique (en poudre). Les obje'ts en argent souillés sont plongés dans le mélange et aussi- tôt purifiés. Selon le degré de souillure, la durée d'action est de 2 à 60 secondes.
REVENDICATIONS
1. Agent et procédé de nettoyage de l'argent ou d'autres métaux précieux, ainsi que des objets plaqués de ces métaux, carac- térisés en ce que l'on traite ceux-ci avec une solution de compo- ou sés de rhodanates/de thiourée,séparément ou en mélange, dont le pH est ajusté à une valeur acide, et de préférence en les plon- geant dans cette solution.
<Desc / Clms Page number 1>
Articles of adornment and use in silver or another precious or rare metal, such as gold, copper and the like or an alloy of these different metals, as well as objects plated with. these metals undergo in contact with foods containing sulfur, other sulphurous materials and especially those containing hydrogen sulphide, an alteration which progressively modifies the color, which passes to brown, then to black. In addition, they tarnish by oxidation.
With the exception of the possibility offered by the pre-sound, that of another metal, of returning these objects to their natural appearance by an electrochemical means, we previously assimilated to
<Desc / Clms Page number 2>
purely chemical agents of powders and special salts mainly consisting of stearin, paraffin, olein, calcium and magnesium carbonates. The objects to be cleaned were rubbed with these powders, which was an essentially mechanical action. This also applies to similar cleansing ointments which owe their pasty appearance only to a proportional composition of the components. Liquid metal cleaning agents have the same or similar composition, but additionally contain alcohol or an ammoniacal solution.
All of these cleaning agents have the disadvantage, that the handling of each part to be cleaned requires rubbing, which inevitably leads to scratches and gouges on the surfaces of the objects to be cleaned. Potash cyanide solutions, also offered for the same purpose, have been eliminated in many cases and especially in the household due to their high toxicity.
It has surprisingly been established that an acidic solution of combinations of rhodanates, such as rhodanates of potash, soda or ammonium or a solution of recent combinations of isomeric thiourea, cleans objects automatically in a very short time, depending on the origin of soiling, often even in a few seconds and that it returns metals to their primitive appearance. It is essential for efficient and rapid cleaning to observe exactly the acidic pH value and the concentration of the combination of rhodanates or thiourea separately or as a mixture.
The rhodanate compounds may also be in the form of salt combinations of rhodanic acid with inorganic groups, such as, for example, the rhodanates of hydrazine and of hydroxylamine, or else with gold groups, anic, such as triethanolamine rhodanate used as such.
The lower the pH value, the faster cleaning is accomplished. Adjusting the acidity of the solution or
<Desc / Clms Page number 3>
Dry mixtures of the two ingredients can result from organic or inorganic acids or their acidic salts. The concentration of the rhodanate compound in the solution must be at least 2%; for that of / thiourea, 15 is already sufficient. However, rhodanate concentrations of a percentage of 20.30 and more are particularly recommended. To improve the cleaning effect, active washing materials can be added to the mixture.
In order to improve the smell, it is advisable to add perfumes, which however have no influence on the washing effect.
The objects to be cleaned are hardly attacked by cleaning agent solutions and do not show scratches or gouges. The cleaning products according to the principle of the invention can be introduced commercially in liquid or solid form or else in paste. In the latter commercial form, its desired consistency is obtained by introducing into the cleaning effect mixtures instead of water, occasionally up to 90% of the polyethylene glycols. bentonite or other similar washing agents.
EXAMPLE 1 70 parts of water
5 parts of sulfuric acid diluted 1: 3
8 parts of thiourea EXAMPLE 2
A silver bracelet, moderately soiled with sulphides, is immersed for 2 minutes in a solution consisting of:
40 parts of rhodanate of potash
2 parts sulfuric acid (diluted)
0.1 part of aryl sulfonate, acoyl
57.9 parts of water.
After removing it, rinse it with water and dry it. The metal shines again as if it were new.
<Desc / Clms Page number 4>
EXAMPLE 3
Spread a powder mixture consisting of:
35 parts of ammonium rhodanate
7 parts citric acid powder
0.1 part of aryl alkyl sulfonate
10 parts of anhydrous sodium sulfate on a wet cloth, where the mixture is immediately voiced; used, and which the year uses to wash a metallic object to be cleaned. After rinsing with water and drying the object, it regained its primitive metallic luster.
EXAMPLE 4
5 parts of thiourea and
5 parts of ammonium rhodanate are mixed with:
60 parts of water and the desired pH is adjusted using citric acid. For this purpose, 5 parts of citric acid (powder) are used. The soiled silver objects are immersed in the mixture and immediately purified. Depending on the degree of soiling, the duration of action is 2 to 60 seconds.
CLAIMS
1. Agent and method for cleaning silver or other precious metals, as well as articles coated with these metals, characterized in that they are treated with a solution of rhodanate compounds or compounds / of thiourea, separately or as a mixture, the pH of which is adjusted to an acid value, and preferably by immersing them in this solution.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE555040A true BE555040A (en) |
Family
ID=179288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE555040D BE555040A (en) |
Country Status (1)
Country | Link |
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BE (1) | BE555040A (en) |
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0
- BE BE555040D patent/BE555040A/fr unknown
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