METHOD OF SELECTIVELY PRECIPITATING METALS FROM SOLUTIONS

摘要

O F T H E D I S C L O S U R E A METHOD OF SELECTIVELY PRECIPITATING METALS FROM SOLUTIONS The invention is a method for selectively precipitating aluminum and iron from solutions initially having a pH of less than 4. The method involves reduction of any ingoing trivalent iron to divalent iron and then neutralizing the solution to a pH exceeding 4 so as to precipitate aluminum hydroxide. The iron in the remaining solution is then oxidized to trivalent state so that the iron content is caused to precipitate out in a compact readily filtered form.