Ammonium Oxalate → Cobaltous oxalate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of cobalt nitrate having a gravity of 1.30 g/cm3 was mixed homogeneously with a solution of yttrium chloride having a concentration of 67 g/l in a volume proportion of 520:1. The mixed solution was heated to 60° C. A solution of ammonium oxalate having a gravity of 1.06 g/cm3 and a pH 2.5 was added while stirring. The quantity of ammonium oxalate added was 1.5 mole equivalent per mole equivalent of cobalt nitrate and yttrium chloride. The precipitate of cobalt oxalate and yttrium oxalate was obtained after reaction and filtrated in a vacuum filtrator to remove mother liquid. The filtrate was washed by distilled water of 100° C. for 5 times, dried at 150° C., crushed and sieved by a 40 mesh sieve, reduced at 450° C. in hydrogen for 6 h. The reduced product was crushed again and sieved by a 120 mesh sieve. The cobalt powder thus prepared contains 0.3% (wt.) yttrium.

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