Purification of nickel chloride solutions
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United States of America Patent
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Sep 9, 1980
Grant Date -
N/A
app pub date -
Feb 16, 1979
filing date -
Feb 16, 1979
priority date (Note) -
Expired
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Abstract
Aqueous nickel chloride solutions containing such impurities as copper, iron, and zinc, and optionally, cobalt, and having an acid concentration ranging from about 0.2 N to 4 N HCl together with a total chloride concentration of about 4 N to 11 N are purified of said impurities by solvent extraction with an organic extractant of essentially tributyl phosphate (TBP) dissolved in a water-immiscible organic solvent, the solvent extraction being carried out at a selected concentration of TBP and a selected volume ratio of organic to the aqueous solution effective to produce a nickel raffinate substantially impoverished in said impurities.
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