DE1068840B - Agent for removing silver-containing residues from plastic parts - Google Patents
Agent for removing silver-containing residues from plastic partsInfo
- Publication number
- DE1068840B DE1068840B DENDAT1068840D DE1068840DA DE1068840B DE 1068840 B DE1068840 B DE 1068840B DE NDAT1068840 D DENDAT1068840 D DE NDAT1068840D DE 1068840D A DE1068840D A DE 1068840DA DE 1068840 B DE1068840 B DE 1068840B
- Authority
- DE
- Germany
- Prior art keywords
- silver
- plastic parts
- containing residues
- agent
- removing silver
- 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.)
- Pending
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052709 silver Inorganic materials 0.000 title claims description 9
- 239000004332 silver Substances 0.000 title claims description 9
- 239000003795 chemical substances by application Substances 0.000 title description 2
- 239000000243 solution Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 6
- BFNBIHQBYMNNAN-UHFFFAOYSA-N Ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229940069002 Potassium Dichromate Drugs 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 230000002378 acidificating Effects 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 230000001590 oxidative Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VZJVWSHVAAUDKD-UHFFFAOYSA-N Potassium permanganate Chemical compound [K+].[O-][Mn](=O)(=O)=O VZJVWSHVAAUDKD-UHFFFAOYSA-N 0.000 description 4
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 3
- JGJLWPGRMCADHB-UHFFFAOYSA-N Hypobromite Chemical compound Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 description 2
- VZDYWEUILIUIDF-UHFFFAOYSA-J cerium(4+);disulfate Chemical compound [Ce+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VZDYWEUILIUIDF-UHFFFAOYSA-J 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- NNFCIKHAZHQZJG-UHFFFAOYSA-N Potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 1
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L Silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 description 1
- UMGDCJDMYOKAJW-UHFFFAOYSA-N Thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 1
- IPAGMSBCYAQWPF-UHFFFAOYSA-N [Ag+2].[O-][Cr]([O-])(=O)=O Chemical compound [Ag+2].[O-][Cr]([O-])(=O)=O IPAGMSBCYAQWPF-UHFFFAOYSA-N 0.000 description 1
- 150000008043 acidic salts Chemical class 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 229910000355 cerium(IV) sulfate Inorganic materials 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000717 retained Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 229910000367 silver sulfate Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 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
- 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
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/30—Acidic compositions for etching other metallic material
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/08—Acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/10—Salts
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Detergent Compositions (AREA)
Description
Mittel zum Entfernen von silberhaltigen Rückständen von Kunststoffteilen Es ist bekannt, daß Silbersalze zusammen mit metallischem Silber sich bei photographischen Arbeiten an den Wannen und Geräten abscheiden und schwarze, fest haftende Niederschläge bilden. Die Entfernung und Ablösung dieser Niederschläge von Kunststoffteilen mit den üblichen Lösungsmitteln, wie Kaliumcyanid in wäßriger Lösung, Salpetersäure, konzentrierter Schwefelsäure oder Hypobromit enthaltender Alkalilauge ist gefährlich und macht bei praktischen Arbeiten erhebliche Schwierigkeiten.Agent for removing silver-containing residues from plastic parts It is known that silver salts together with metallic silver are used in photographic applications Separate work on the tubs and devices and black, firmly adhering precipitates form. The removal and detachment of these deposits from plastic parts with the usual solvents, such as potassium cyanide in aqueous solution, nitric acid, concentrated sulfuric acid or alkaline lye containing hypobromite is dangerous and makes considerable difficulties in practical work.
Es hat sich nun herausgestellt, daß eine schnelle, ungefährliche und vollständige Ab- und Auflösung der silberhaltigen Schichten möglich ist, wenn man Salze mit hohem Oxydationspotential, wie Kaliumbichromat oder Kaliumpermanganat oder Cer(IV)-sulfat in saurer Lösung, verwendet und die zu reinigenden Kunststoffteile mit dieser Lösung behandelt. Das Silber löst sich als Silbersulfat und Silberchromat.It has now been found that a fast, safe and complete removal and dissolution of the silver-containing layers is possible if one Salts with a high oxidation potential, such as potassium dichromate or potassium permanganate or cerium (IV) sulfate in acidic solution, and the plastic parts to be cleaned treated with this solution. The silver dissolves as silver sulfate and silver chromate.
Die Bestandteile des Reinigungsmittels halten sich zweckmäßigerweise in folgenden Grenzen 3 bis 15 Gewichtsprozent einer Verbindung mit hohem Oxydationspotential 1 bis 15 Gewichtsprozent 96°;'oige Schwefelsäure 0,5 bis 5 Gewichtsprozent Ammoniumsulfat 65 bis 95,5 Gewichtsprozent Wasser. Beispiel 1 10 Gewichtsprozent Kaliumbichromat werden in 81,5 Gewichtsprozent Wasser aufgelöst. Dann werden 7,5 Gewichtsprozent konzentrierter Schwefelsäure (96°/ö ig) dazugegeben. Zum Schluß wird 1 Gewichtsprozent Ammoniumsulfat der obigen sauren Salzlösung zugegeben.The components of the cleaning agent are expediently retained within the following limits 3 to 15 percent by weight of a compound with a high oxidation potential 1 to 15 percent by weight 96% sulfuric acid, 0.5 to 5 percent by weight ammonium sulfate 65 to 95.5 percent by weight water. Example 1 10 weight percent potassium dichromate are dissolved in 81.5 percent by weight of water. Then 7.5 percent by weight concentrated sulfuric acid (96%) added. Finally, 1 percent by weight Ammonium sulfate was added to the above acidic salt solution.
Die Kunststoffplatten werden durch derartige Lösungen nicht angegriffen, auch nach Verdünnung mit dem gleichen Anteil Wasser haben sie noch gute Wirkung.The plastic panels are not attacked by such solutions, they still have a good effect even after dilution with the same proportion of water.
Aus der deutschen Patentschrift 486 324 ist zwar eine saure Bichromatlösung als Abschwächer von Silberpositiven und -negativen bekannt, aber diese Lösung eignet sich insofern nicht zum Reinigen der in den Entwicklungsapparaten verwendeten und durch Silberrückstände verunreinigten Kunststoffplatten, als die Ablösung der Silberrückstände von diesen Platten mit dieser Lösung die 20- bis 30fache Zeit beansprucht wie die oben angeführte Bichromatlösung; dies bedeutet einen ausschlaggebenden Fortschritt.From the German patent specification 486 324 there is an acidic bichromate solution known as an attenuator of silver positives and negatives, but this solution works So far not to clean the used in the developing apparatus and Plastic plates contaminated by silver residues, as the removal of the silver residues of these plates with this solution took 20 to 30 times as long as that bichromate solution listed above; this is a decisive step forward.
Auch die als Abschwächer von Silberpositiven und -negativen sowie als Entferner von Silberflecken aus Stoffen vorgeschlagenen Thioharnstofflösungen entfernen Silberrückstände erst in der 30- bis 100fachen Zeit, wie sie die angeführte Bichromatlösung von den Kunststoffplatten ablöst.Also as attenuators of silver positives and negatives as well thiourea solutions proposed as a remover of silver stains from fabrics remove silver residues only in 30 to 100 times the time as they are listed Bichromate solution separates from the plastic plates.
Beispiel 2 5 g Kaliumpermanganat werden in 51g Wasser gelöst, dann 4 g konzentrierte Schwefelsäure zugegeben. Beispiel 3 5 g Cer (IV)-sulfat werden in 92 g Wasser gelöst, dann 3 g konzentrierte Schwefelsäure zugegeben.Example 2 5 g of potassium permanganate are dissolved in 51 g of water, then 4 g of concentrated sulfuric acid were added. Example 3 5 g cerium (IV) sulphate become dissolved in 92 g of water, then 3 g of concentrated sulfuric acid were added.
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1068840B true DE1068840B (en) | 1959-11-12 |
Family
ID=594096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1068840D Pending DE1068840B (en) | Agent for removing silver-containing residues from plastic parts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1068840B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2511433A1 (en) * | 1974-04-24 | 1975-12-04 | Degussa | METHOD OF CLEANING PHOTO TANKS |
| EP2090675A1 (en) * | 2008-01-31 | 2009-08-19 | Imec | Defect etching of germanium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE486324C (en) * | 1928-11-29 | 1929-11-13 | I G Farbenindustrie Akt Ges | Photographic attenuator |
-
0
- DE DENDAT1068840D patent/DE1068840B/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE486324C (en) * | 1928-11-29 | 1929-11-13 | I G Farbenindustrie Akt Ges | Photographic attenuator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2511433A1 (en) * | 1974-04-24 | 1975-12-04 | Degussa | METHOD OF CLEANING PHOTO TANKS |
| EP2090675A1 (en) * | 2008-01-31 | 2009-08-19 | Imec | Defect etching of germanium |
| US8513141B2 (en) | 2008-01-31 | 2013-08-20 | Imec | Defect etching of germanium |
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