Patents Examined by Daniel G. Metzmaier
  • Process for producing a spherical silica gel
    Patent number: 6451862
    Abstract: A process for producing a spherical silica gel, which comprises supplying a liquid mixture of an alkali silicate solution and an acid solution to a spraying apparatus, spraying the liquid mixture to obtain droplets, bringing the droplets into contact with a liquid for recovering a silica gel, and recovering the formed spherical silica gel together with the liquid for recovering a silica gel, as a slurry.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: September 17, 2002
    Assignee: Asahi Glass Company, Limited
    Inventors: Makoto Kusaka, Hachiro Hirano, Masaharu Tanaka, Hiroo Mori