GR1003419B - Process for the removal of aluminium and/or chromium from nickeland?or cobalt sulphate solutions at atmospheric pressure - Google Patents
Process for the removal of aluminium and/or chromium from nickeland?or cobalt sulphate solutions at atmospheric pressureInfo
- Publication number
- GR1003419B GR1003419B GR990100129A GR990100129A GR1003419B GR 1003419 B GR1003419 B GR 1003419B GR 990100129 A GR990100129 A GR 990100129A GR 990100129 A GR990100129 A GR 990100129A GR 1003419 B GR1003419 B GR 1003419B
- Authority
- GR
- Greece
- Prior art keywords
- nickel
- aluminium
- chromium
- cobalt
- removal
- Prior art date
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to the removal of aluminium and/or chronium from nickel and/or cobalt sulphate solutions, by chemical precipitation, at atmospheric pressure. The invention comprises a process for aluminium and/or chromium precipitation, as basic sulphate salts of alunite type, at atmospheric pressure and temperatures not exceeding 100 oC. It achieves equilibrium aluminum and/or chromium concentrations lower than 200 and 50 ppm, respectively as well as excellent filtering properties of the produced precipitate. The pH of the solution is slowly raised, by addition of a neutralizing agent, to a final value in the range 2.5 to 4.5. Addition of seed material is highly advantageous for minimizing the reaction time and enhancing crystal growth of the precipitate. The nickel and/or cobalt losses in the precipitates are kept low. The produced precipitate, after washing with water, is environmentally acceptable for disposal, according to standard tests. The disclosed method for the removal of aluminium and/or chromium enables the treatment of nickel and/or cobalt sulphate solutions, produced by sulphuric acid leaching of nickel ores, for nickel/cobalt separation and recovery by various techniques.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR99100129 | 1999-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GR1003419B true GR1003419B (en) | 2000-09-01 |
Family
ID=10943797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GR990100129A GR1003419B (en) | 1999-04-19 | 1999-04-19 | Process for the removal of aluminium and/or chromium from nickeland?or cobalt sulphate solutions at atmospheric pressure |
Country Status (1)
Country | Link |
---|---|
GR (1) | GR1003419B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA618826A (en) * | 1958-04-21 | 1961-04-25 | S. Simons Courtney | Recovery of nickel, cobalt and other valuable metals |
US4097575A (en) * | 1976-11-05 | 1978-06-27 | Amax Inc. | Roast-neutralization-leach technique for the treatment of laterite ore |
US4548794A (en) * | 1983-07-22 | 1985-10-22 | California Nickel Corporation | Method of recovering nickel from laterite ores |
AU4089096A (en) * | 1995-01-09 | 1996-07-18 | Lionore Australia (Avalon) Pty Ltd | The recovery of nickel and cobalt from lateritic ores |
US5674402A (en) * | 1993-06-17 | 1997-10-07 | Kemira Kemi Ab | Method for the treatment of water treatment sludge |
-
1999
- 1999-04-19 GR GR990100129A patent/GR1003419B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA618826A (en) * | 1958-04-21 | 1961-04-25 | S. Simons Courtney | Recovery of nickel, cobalt and other valuable metals |
US4097575A (en) * | 1976-11-05 | 1978-06-27 | Amax Inc. | Roast-neutralization-leach technique for the treatment of laterite ore |
US4548794A (en) * | 1983-07-22 | 1985-10-22 | California Nickel Corporation | Method of recovering nickel from laterite ores |
US5674402A (en) * | 1993-06-17 | 1997-10-07 | Kemira Kemi Ab | Method for the treatment of water treatment sludge |
AU4089096A (en) * | 1995-01-09 | 1996-07-18 | Lionore Australia (Avalon) Pty Ltd | The recovery of nickel and cobalt from lateritic ores |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ML | Lapse due to non-payment of fees |
Effective date: 20141104 |