GB989813A - Improvements in or relating to the purification of nickel and cobalt electroplating b - Google Patents
Improvements in or relating to the purification of nickel and cobalt electroplating bInfo
- Publication number
- GB989813A GB989813A GB1162262A GB1162262A GB989813A GB 989813 A GB989813 A GB 989813A GB 1162262 A GB1162262 A GB 1162262A GB 1162262 A GB1162262 A GB 1162262A GB 989813 A GB989813 A GB 989813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- solutions
- barium
- strontium
- carbonates
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
Abstract
Metal impurities in acidic nickel and cobalt solutions e.g electroplating solutions, are removed by adding sufficient barium or strontium oxides, hydroxides or carbonates to the solutions in order to raise the pH above 5 and filtering off the precipitated impurities. When chloride solutions are to be purified a slight excess of soluble sulphate may be added after the pH raising stage to precipitate any barium or strontium that may be in solution. In the example, portions of a standard Watts solution containing about 300 g/l of nickel sulphate about 60 g/l of nickel chloride and 40 g/l of boric acid were oxidized with hydrogen peroxide and the metal impurities precipitated therefrom by the addition of barium and strontium hydroxides and carbonates. In all cases the final pH was 5.2 and the temperature was either 55 DEG or 65 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9876261A | 1961-03-28 | 1961-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB989813A true GB989813A (en) | 1965-04-22 |
Family
ID=22270773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1162262A Expired GB989813A (en) | 1961-03-28 | 1962-03-27 | Improvements in or relating to the purification of nickel and cobalt electroplating b |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1521827A1 (en) |
| GB (1) | GB989813A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680126A (en) * | 1986-02-18 | 1987-07-14 | Frankard James M | Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters |
| CN103484927A (en) * | 2013-10-08 | 2014-01-01 | 昆山纯柏精密五金有限公司 | Treatment method of electronickelling waste liquid |
-
1962
- 1962-03-27 GB GB1162262A patent/GB989813A/en not_active Expired
- 1962-03-27 DE DE19621521827 patent/DE1521827A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680126A (en) * | 1986-02-18 | 1987-07-14 | Frankard James M | Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters |
| CN103484927A (en) * | 2013-10-08 | 2014-01-01 | 昆山纯柏精密五金有限公司 | Treatment method of electronickelling waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1521827A1 (en) | 1969-12-04 |
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