Forming Insoluble Substance In Liquid Patents (Class 423/55)
Ammoniating or nitrating (Class 423/56)
Sulfating (Class 423/57)
Forming compound containing plural metals (Class 423/58)
  • Treatment of chromium ore residues to suppress pollution
    Patent number: 3937785
    Abstract: Method for treating solid ore residue obtained by production of chromium chemicals from chromite ore, to reduce leaching of chromium compounds therefrom after disposal, which involves reducing the particle size of the residue prior to disposal so that at least about 20 percent by weight of the residue passes through a 200 mesh (U.S.) screen.
    Type: Grant
    Filed: September 17, 1974
    Date of Patent: February 10, 1976
    Assignee: Allied Chemical Corporation
    Inventors: Alan Brian Gancy, Christian Albert Wamser