DISSOLUTION METHOD OF CO PRECIPITATE WITH ACID

摘要

A dissolution method for Co precipitate containing at least Co and Fe hydroxides using acid, wherein the pH of the processing solution is kept in the range between 0.5 and 2.0, so that the Co dissolves into the processing solution together with the Fe, after which the pH of the processing solution is raised to the range between 2.0 and less than 3.0 to distribute the Fe preferentially into the precipitate.