Production of nickel powder from basic nickel carbonate
Abstract
Abstract SUBSTANTIALLY PURE NICKEL POWDER IS PRODUCED FROM NICKEL AND COBALT BEARING AQUEOUS AMMONIACAL AMMONIUM CARBONATE LIQUOR CONTAINING COPPER AND OTHER UNDERSIRABLE IMPURITIES SUCH AS ZINC, MAGNESIUM AND MANGANESE BY FIRST TREATING THE LIQUOR TO REMOVE ONLY SUFFICIENT COBALT TO PRODUCE A NICKEL TO COBALT MOLAR RATIO IN THE SOLUTION BETWEEN ABOUT 100 AND 200. THE SOLUTION IS THEN BOILED TO PRECIPITATE THE NICKEL AND RESIDUAL COBALT AS BASIC CARBONATES. THE BASIC CARBONATES PERCIPITATE IS SLURRIED IN AQUEOUS MEDIA AND IS REACTED WITH HYDROGEN AT ELEVATED TEMPERATURE AND PRESSURE UNDER CONDITIONS WHICH ARE CONTROLLED TO ENSURE THAT THE PH AT THE END OF THE REDUCTION REACTION IS BETWEEN ABOUT 2 AND ABOUT 3. CONTROL OF PH IN THIS RANGE AVOIDS CONTAMINATION OF THE NICKEL POWDER BY THE IMPURITIES. SPECIFICALLY, PH IS CONTROLLED BY ADJUSTMENT OF THE RELATIVE SULPHATE ION AND AMMONIA CONTENT OF THE REDUCTION FEED SLURRY.
Inventors
- 👤 D Weir
- 👤 W Seibt
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
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