Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Iron group metal
Patent
1987-10-13
1989-06-20
Stoll, Robert L.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Iron group metal
423139, 423140, 423592, 75 05AA, 75 05BA, 75119, 75101R, 75108, 75DIG2, 75DIG3, C01G 5100, C22B 2300
Patent
active
048407763
ABSTRACT:
A method is disclosed for purifying cobalt of sodium and ammonia which involves heating a solution of hexammine cobalt (III) chloride at a temperature of at least about 80.degree. C., adding sodium hydroxide to the solution at a rate of addition not exceeding about 0.22 moles of sodium hydroxide per mole of cobalt per minute with the total amount of sodium hydroxide not exceeding about 1.4 times the stoichiometric amount required to form cobaltic hydroxide, separating the resulting cobaltic hydroxide precipitate from the resulting liquor, washing the precipitate with hot deionized water to remove sodium so that the level of sodium in the cobaltic hydroxide is equal to or less than about 60 weight parts per million on a cobalt basis, and firing the resulting washed precipitate at a temperature of from about 180.degree. C. to about 850.degree. C. to remove essentially all of the water and ammonia therefrom.
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Castle Donald R.
GTE Products Corporation
Harvey Paige C.
Quatrini L. Rita
Stoll Robert L.
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