Patents Examined by Paul E. Kanopka
  • Adsorbent for phosphorus and method for production of adsorbent for phosphorus
    Patent number: 5008224
    Abstract: An amorphous substance obtained by mixing volcanic ash with or without added clay and water and, if necessary, a surfactant, kneading the mixture, and shaping and firing. Additives such as camphor or naphthalene may be included prior to firing for plasticity and to form pores. The resultant mixture possesses an ability to adsorb phosphorus selectively. When this substance is placed in contact with a phosphorus-containing liquid, it removes phosphorus from the liquid.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: April 16, 1991
    Assignees: Agency of Industrial Science and Technology, Ministry of International Trade and Industry
    Inventors: Eiji Watanabe, Nasakazu Horio, Kenzi Suzuki