GB885383A - Recovery of depleted chemical nickle plating baths - Google Patents
Recovery of depleted chemical nickle plating bathsInfo
- Publication number
- GB885383A GB885383A GB36513/58A GB3651358A GB885383A GB 885383 A GB885383 A GB 885383A GB 36513/58 A GB36513/58 A GB 36513/58A GB 3651358 A GB3651358 A GB 3651358A GB 885383 A GB885383 A GB 885383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphite
- sulphate
- nickel
- alkaline earth
- sodium
- 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
Links
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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1617—Purification and regeneration of coating baths
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemically Coating (AREA)
Abstract
A depleted aqueous chemical nickel-plating solution of the nickel cation-hypophosphite anion type which contains undesirable phosphite is regenerated by adding thereto alkaline earth cations and hydroxyl ions so as to precipitate alkaline earth phosphite without precipitating substantial amounts of alkaline earth hypophosphite or of any nickel compound, removing the precipitated alkaline earth phosphite, and then adding to the resulting solution nickel cations, hypophosphite anions and hydrogen ions to produce a plating solution of desired composition. Thus, a depleted solution made up from nickel sulphate, sodium hypophosphite, lactic ions and propionic ions, which contains undesirable phosphite and has a pH below 5,5, is (a) cooled to 0 DEG -5 DEG C. to crystallize out sodium sulphate, (b) filtered to remove the sodium sulphate, (c) treated with calcium sulphate and calcium hydroxide (or oxide or carbonate) to raise the pH to 5,5-7,0 and to precipitate calcium phosphite, (d) filtered to remove the calcium phosphite, (e) optionally treated with sodium fluoride to precipitate calcium fluoride which is then filtered out, and (f) reconstituted by addition thereto of nickel sulphate, sodium hypophosphite, lactic acid and propionic acid together with sulphuric acid and sodium hydroxide to obtain the desired pH of 4,5-4,7. Other alkaline earth cations which may be used are barium and strontium, e.g. as the sulphate or chloride. The solution may be used in a continuous plating system and regenerated as a whole or continuously.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US885383XA | 1958-01-17 | 1958-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB885383A true GB885383A (en) | 1961-12-28 |
Family
ID=22211940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36513/58A Expired GB885383A (en) | 1958-01-17 | 1958-11-13 | Recovery of depleted chemical nickle plating baths |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB885383A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602423A (en) * | 2022-03-30 | 2022-06-10 | 张更宇 | Preparation method of modified volcanic cinders filler |
| CN114733269A (en) * | 2022-04-28 | 2022-07-12 | 龙佰集团股份有限公司 | Method for cleaning titanium gypsum filter cloth |
-
1958
- 1958-11-13 GB GB36513/58A patent/GB885383A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602423A (en) * | 2022-03-30 | 2022-06-10 | 张更宇 | Preparation method of modified volcanic cinders filler |
| CN114733269A (en) * | 2022-04-28 | 2022-07-12 | 龙佰集团股份有限公司 | Method for cleaning titanium gypsum filter cloth |
| CN114733269B (en) * | 2022-04-28 | 2024-02-06 | 龙佰集团股份有限公司 | Method for cleaning titanium gypsum filter cloth |
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