Verfahren zur Gewinnung von sehr reinem Nickelpulver

摘要

High purity nickel powder is produced by treating a slurry of nickel carbonate (up to 150 grams per litre of Ni) in aqueous ammonium carbonate solution (up to 1.5 moles CO2 per mole of Ni and up to 8 moles NH3 per mole of Ni) with hydrogen at a temperature above 100 DEG C. and with a partial pressure of hydrogen above 100 p.s.i. The density of the powder produced may be varied by controlling the conditions within the above ranges. The initial nickel carbonate slurry may be produced by heating an aqueous ammoniacal nickel ammonium carbonate solution (e.g. by steam injection) to precipitate basic nickel carbonate.