Patents Assigned to DOW METALS & MINING CO., LTD.
  • Publication number: 20080190779
    Abstract: There is provided a method for recovering indium, the method being capable of recovering indium having a high purity at simple and inexpensive steps in a short time and with a high recovery. After indium containing substances, such as ITO target scraps, are crushed, the crushed substances are ground until the percentage of coarse particles having a larger particle size than a predetermined particle size is not larger than a predetermined percentage. Thereafter, the ground substances are dissolved in an acid, and the solution thus obtained is neutralized with an alkali so that the pH of the solution is 0.5 to 4. Then, the solution is aged at a temperature of 60 to 70° C. for 3 hours or longer to deposit and remove hydroxides of predetermined metal ions in the solution.
    Type: Application
    Filed: January 27, 2006
    Publication date: August 14, 2008
    Applicant: DOW METALS & MINING CO., LTD.
    Inventors: Yuzuru Nakamura, Shigeru Ogasawara, Atsushi Komori, Hitoshi Aosaki