AU2920599A - Method for electrically regenerating contaminated rhodium solutions - Google Patents
Method for electrically regenerating contaminated rhodium solutionsInfo
- Publication number
- AU2920599A AU2920599A AU29205/99A AU2920599A AU2920599A AU 2920599 A AU2920599 A AU 2920599A AU 29205/99 A AU29205/99 A AU 29205/99A AU 2920599 A AU2920599 A AU 2920599A AU 2920599 A AU2920599 A AU 2920599A
- Authority
- AU
- Australia
- Prior art keywords
- rhodium
- solution
- solutions
- cathode area
- hexavalent
- 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.)
- Abandoned
Links
- 230000001172 regenerating effect Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 150000003283 rhodium Chemical class 0.000 title 1
- 229910052703 rhodium Inorganic materials 0.000 abstract 9
- 239000010948 rhodium Substances 0.000 abstract 9
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract 9
- 239000000243 solution Substances 0.000 abstract 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract 2
- 239000012670 alkaline solution Substances 0.000 abstract 2
- 238000005868 electrolysis reaction Methods 0.000 abstract 2
- 239000003014 ion exchange membrane Substances 0.000 abstract 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a method for electrically regenerating rhodium solutions, designed especially for regenerating rhodium solutions containing sulphuric acid and/or phosphoric acid or rhodium chloride solutions. The solution to be regenerated is introduced in the anode area (12) of an electrolytic cell (10), which is separated from the associated cathode area (14) by an ion exchange membrane (16), said cathode area being filled with a dilute acid having a good conductivity. The rhodium solution pH is increased so as to reach a value greater than 10, preferably in the range from 10 to 14, by adding an alkaline solution, i.e. a concentrated hydroxide potassium solution. Electrolysis is carried out at electric densities that are so high that the trivalent rhodium of the rhodium solution is oxidised to form an hexavalent rhodium, and possible impurities are depleted by the ion exchange membrane (16) in the catholytes. Hexavalent rhodium is transferred in the cathode area at a speed slightly smaller than trivalent rhodium, and therefore no noticeable rhodium depletion can be observed. This is particularly true when pH during electrolysis is maintained at a value permanently greater than 1.5 by means of proper addition of alkaline solution.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19804534A DE19804534C1 (en) | 1998-02-05 | 1998-02-05 | Impure rhodium solution is regenerated by anodic oxidation in a cell with a cation exchange membrane |
| DE19804534 | 1998-02-05 | ||
| PCT/DE1999/000316 WO1999040238A2 (en) | 1998-02-05 | 1999-02-05 | Method for electrically regenerating contaminated rhodium solutions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2920599A true AU2920599A (en) | 1999-08-23 |
Family
ID=7856724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU29205/99A Abandoned AU2920599A (en) | 1998-02-05 | 1999-02-05 | Method for electrically regenerating contaminated rhodium solutions |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1051541B1 (en) |
| AT (1) | ATE209709T1 (en) |
| AU (1) | AU2920599A (en) |
| DE (2) | DE19804534C1 (en) |
| WO (1) | WO1999040238A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI818791B (en) * | 2022-11-02 | 2023-10-11 | 環球晶圓股份有限公司 | Processing system and processing method for electroless nickel plating solution |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB662299A (en) * | 1949-07-08 | 1951-12-05 | Mond Nickel Co Ltd | A process for the purification of rhodium |
| US3375179A (en) * | 1964-10-29 | 1968-03-26 | Litton Systems Inc | Method of anodizing beryllium and product thereof |
| GB1144716A (en) * | 1966-03-29 | 1969-03-05 | Ustav Nerostnych Surovin | Method of producing rhodium concentrates |
| GB1491521A (en) * | 1975-01-07 | 1977-11-09 | Swarsab Mining | Separation and purification of rhodium |
| ZA775358B (en) * | 1977-09-06 | 1979-04-25 | Nat Inst Metallurg | The recovery and purification of rhodium |
| FR2616810B1 (en) * | 1987-03-25 | 1989-08-18 | Rhone Poulenc Sante | ELECTROCHEMICAL PROCESS FOR RECOVERING METAL RHODIUM FROM AQUEOUS SOLUTIONS OF USED CATALYSTS |
-
1998
- 1998-02-05 DE DE19804534A patent/DE19804534C1/en not_active Expired - Fee Related
-
1999
- 1999-02-05 AU AU29205/99A patent/AU2920599A/en not_active Abandoned
- 1999-02-05 WO PCT/DE1999/000316 patent/WO1999040238A2/en not_active Ceased
- 1999-02-05 DE DE59900461T patent/DE59900461D1/en not_active Expired - Fee Related
- 1999-02-05 EP EP99910109A patent/EP1051541B1/en not_active Expired - Lifetime
- 1999-02-05 AT AT99910109T patent/ATE209709T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE59900461D1 (en) | 2002-01-10 |
| ATE209709T1 (en) | 2001-12-15 |
| WO1999040238A2 (en) | 1999-08-12 |
| EP1051541B1 (en) | 2001-11-28 |
| DE19804534C1 (en) | 1999-06-24 |
| WO1999040238A3 (en) | 1999-09-30 |
| EP1051541A2 (en) | 2000-11-15 |
| HK1034544A1 (en) | 2001-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK6 | Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase |