JPS57188690A - Recovering method for gold from waste liquid of stripping of gold plating - Google Patents
Recovering method for gold from waste liquid of stripping of gold platingInfo
- Publication number
- JPS57188690A JPS57188690A JP7160981A JP7160981A JPS57188690A JP S57188690 A JPS57188690 A JP S57188690A JP 7160981 A JP7160981 A JP 7160981A JP 7160981 A JP7160981 A JP 7160981A JP S57188690 A JPS57188690 A JP S57188690A
- Authority
- JP
- Japan
- Prior art keywords
- gold
- waste liquid
- stripping
- oxidizing agent
- liquid
- 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
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
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
-
- 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
- C23F1/46—Regeneration of etching compositions
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)
- ing And Chemical Polishing (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
PURPOSE: To recover gold easily with good current efficiency in the stage of recovering the gold in waste liquid of stripping of gold plating which is alkaline and contains an oxidizing agent by electrolysis by adding H2O2 beforehand to said liquid and heating the same.
CONSTITUTION: ≥0.5wt% H2O2 is added to the waste liquid of stripping of gold plating which contains an oxidizing agent that reduces H2O2 in an alkaline bath, and contains ≥1 component of any of Cu, Ni, Fe in 10ppm liquid concns. After this liquid is heated for ≥5min at 30W90°C, it is electrolyzed. Here, if the heating temp. is below the lower limit, the rate of reaction is too low and in excess of the upper limit, the rate of evaporation is too high, and these are undesirable for working conditions. The oxidizing agent in the waste liquid is reduced by H2O2 and the electric current to be used for the electrolysis is not more wastefully consumed for the reduction of the oxidizing agent. The decrease in the current efficiency owing to the presence of the excess H2O2 above the oxidation- reduction equiv. is prevented by the heating.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7160981A JPS57188690A (en) | 1981-05-13 | 1981-05-13 | Recovering method for gold from waste liquid of stripping of gold plating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7160981A JPS57188690A (en) | 1981-05-13 | 1981-05-13 | Recovering method for gold from waste liquid of stripping of gold plating |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57188690A true JPS57188690A (en) | 1982-11-19 |
Family
ID=13465556
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7160981A Pending JPS57188690A (en) | 1981-05-13 | 1981-05-13 | Recovering method for gold from waste liquid of stripping of gold plating |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57188690A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001863A3 (en) * | 1998-07-01 | 2000-06-15 | Otb Oberflaechentechnik Berlin | Method for recovering precious metals |
CN105164317A (en) * | 2013-05-31 | 2015-12-16 | 朝日浦力环境科技有限公司 | Method and device for treating iodine-containing etching solution which contains au |
-
1981
- 1981-05-13 JP JP7160981A patent/JPS57188690A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000001863A3 (en) * | 1998-07-01 | 2000-06-15 | Otb Oberflaechentechnik Berlin | Method for recovering precious metals |
CN105164317A (en) * | 2013-05-31 | 2015-12-16 | 朝日浦力环境科技有限公司 | Method and device for treating iodine-containing etching solution which contains au |
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