Patents Assigned to Guilini Chemie G.m.b.H.
  • Method for producing coarsely crystalline alumina
    Patent number: 4130402
    Abstract: Coarsely crystalline aluminum oxide is provided which contains the following trace elements: V.sub.2 O.sub.5 > 0.005 percent by weight, P.sub.2 O.sub.5 > 0.005 percent by weight, Na.sub.2 O > 0.8 percent by weight.A method is provided for producing such an aluminum oxide by calcining aluminum hydroxide in the presence of at least one flouride and of vanadium salt.
    Type: Grant
    Filed: May 24, 1977
    Date of Patent: December 19, 1978
    Assignee: Guilini Chemie G.m.b.H.
    Inventors: Bernhard Schepers, Heinz Hellinghausen, Alois Kramer